Oracle VM Oracle RAC(Real Application Clusters) by slappypappy123

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									50 | 2009 Summer                     Oracle Korea Magazine
*Technology & Developer | Oracle VM                                Oracle RAC(Real Application Clusters)




                                    , April 2009

        Oracle VM                                                      Oracle RAC(Real Application Clusters)
             _Daniel Dibbets, Markus Michalewicz
             _           Linux Architect,            Linux & Open Source




“                                                             Oracle VM                             RAC                                                                           .
    .                                       Oracle VM                  Oracle RAC                                            Oracle RAC                                 , Oracle VM
                                    (Best Practice)                                                            Oracle RAC                                                         .
         .”


Oracle VM        Oracle RAC                                                                         Oracle RAC                                         Oracle Database Enterprise
                                                                               .                    Edition                . Oracle RAC                   (shared-nothing)
                                                                                                             (shared-disk)


                                                                                                                                               .
                                                                           .                        Oracle RAC      Oracle                                                        .
                                                                                                    Oracle RAC                                                               Oracle
                                                               .                                    Clusterware                 . Oracle Clusterware           (farm)
Oracle VM                                                                            .                                 .
                                (Oracle VM)                                                                                        . Oracle Clusterware
Oracle RAC                                                                                                                                         Oracle
                                                 ,                                              .                                  .
Oracle VM        Oracle RAC                                                         (CPU                       Oracle RAC                 Oracle Automatic Storage Management
                           CPU                                Oracle RAC                            (ASM)                                                  .
                                                                   )
    (Sub-Capacity License)                                                                                             .                                                     Oracle
         .       ,                                   (                                              Database                                ASM
                     ,                                        )             .      Oracle VM          raw I/O                          . Oracle Automatic Storage Management
Oracle RAC                                                                                          Oracle
                                                 .                         Oracle VM       Oracle          . Oracle VM
                                                                                                                                                                                                                               51




                                                        . Oracle VM
                                                                                            . Oracle           .                                               (Oracle Clusterware                                 )
VM        Oracle RAC                                                          Oracle                                                            .
                                    .
                                                                                                                                           .
Oracle RAC                              Oracle Database
    ( : Oracle Ebusiness Suite, Peoplesoft, Siebel, SAP) OLTP, DSS                                         . Oracle RAC             Oracle Database                                             Oracle Database
                                                                                                                            ,                                                                          .
                                                                                        .
                                                                                                       Oracle VM                ?
Oracle RAC                                                                                             Oracle VM
RAC Database                                                      .                                                                                             . Oracle VM
                                                                          .                                                                                                                                     . Oracle VM
                    SMP(Symmetric Multi-Processor)                                                                                                  .
                                                .
                                                          .                                                Oracle VM Manager : Oracle VM Server                                                                ADF(Application
                                                                                                           Development Framework)                                                                                          .
                            .                   ,                     (interconnects)
                                                                                                                                (VM)                           VM           , VM                ,          ,           ,
              (redundant)                                                                                                                                 VM             (lifecycle)                   . ISO           , VM
          .                                                       SPOF(Single Point-Of-Failure)                                                                                  .

                                                              .                                            Oracle VM Server : VM                                                     ,
                                                                                                                                                                            . Oracle VM Server                                      Xen
                                                                                                           hypervisor                                                                     Oracle VM Agent                           .
                                                                                                           Oracle VM Agent : Oracle VM Server                                                   . VM                   Oracle VM
                                                                                                           Manager                     .

                                                                                                                                                                  Oracle VM

                                                                                                                                                             Oracle VM Manager

                                                                                                                                                        Web Browser-based User Interface
                                                                                                              Oracle VM
                                                                                                               Manager
                                                                                                                                                        JavaTM-based Management Server
                                                                                                              Repository
                                                    SAN(Storage Area Network)


                                                                                                                                                               Oracle VM Server

                                                                                                                                    Oracle VM Agent
                                                                                                                                               dom0                  domU                domU       domU
<       1> Oracle RAC
                                                                                                                                                                    Hypervisor

                                                                                                                                               Host Hardware, CPU, Memory, Network, Disk

        Oracle Database                                   Oracle RAC
                                                                                                       <     2> Oracle VM
          (                                                                                     )
Oracle Database(
    .                                                                          )            .
                                (                                     )
52 | 2009 Summer                                  Oracle Korea Magazine
*Technology & Developer | Oracle VM                                                   Oracle RAC(Real Application Clusters)




Oracle VM                           Oracle RAC
                                                                                                                                              Oracle VM HA(           HA)    Oracle VM               Oracle Clusterware(            HA)    Oracle VM
               Oracle VM                               Oracle RAC                                                                                                 /                                                                           /

       .                                                             .


                   : CPU                                       CPU                                  Oracle RAC                                                        Shared Cache/RAC                                                        Protected App A



                                                                                                             .                                                                            Oracle Clusterware
                                                                                                                                                       Guest OS                      Guest OS                        Guest OS                    Guest OS
                                                                   Oracle RAC                                         ( : CPU
       )                                                                                        .            ,                                      Guest VM                         Guest VM                        Guest VM                    Guest VM



                                              Oracle RAC                                                         Oracle VM                              DOM-0                                                   Hypervisor

                            .
                                                                                                                                                                                     x86/64 Bare-Metal Server
                                    (Sub-Capacity License)                       :
 Oracle RAC                                                                                    CPU                                                                CPU        Mem                                              Mem          CPU
                        .                         Oracle RAC                                             CPU
                                              .                                                                  Oracle VM
                            .                                                            CPU                                          <        3> Oracle VM HA          Oracle RAC
               ,                                  CPU                                                    .
                                                                                                                                  .                                            1                                                             , Oracle VM
 Oracle VM                                                                                Oracle VM                                   HA                                                                                 Oracle VM
                                          .                                                                                                                              .      ,                    Oracle VM                VM
                                    : Oracle VM
                                                                                                                                                                                                     VM
           .                                               ,
   .           Oracle RAC                                                                                             .
                                                                                                                                                         .                                                                                Oracle VM
                                                                             .                                                                                                                         Oracle VM
                    /                                                                                                                                                                                                                                .
                                :                                                                    (                            )
                                                                                                                                      Oracle VM
                                                                                                    . Oracle VM
                                                                                                                                                                             Oracle Clusterware(Oracle RAC                                       )
                                                               .         ,                                                .
                                                  (Oracle RAC)                                                                .                                   HA                                    .
                                                                                                                                                                                Oracle VM
                                    , HA(High Availability)                                                                                                                           . Oracle VM HA                                       HA                   HA
                                                                                              , Oracle RAC                                                                                                                ,
  Oracle Database                                                                                                                                  Oracle RAC( )                                                                                 Oracle VM
                                                               .                                             Oracle VM                HA                (rule engine)                                                                                    .
HA(            HA)          Oracle Clusterware                       (               HA, Oracle RAC                       )               ,             Oracle RAC                                                                  Oracle VM
                                      2           HA                                     (<         3>           ).                             Oracle VM HA                                                         .          HA
                                                                                                                                                              (                       )                          .


                                                                                                                                               1. Oracle Real Application Clusters High Availability and Scalability

                                                                                                                                                  a.                    Oracle VM               HA

                                                                                                                                                  b. Oracle VM                      HA

                                                                                                                                               2. Oracle Clusterware(                                       )                   HA

                                                                                                                                                  a.                    Oracle VM               HA
                                                                                                                                                                                                                 53




             b. Oracle VM                    HA                                                                        RAC                                                    2          Oracle VM
        3.                Oracle VM                HA(Oracle RAC                                    )                                                            .


                                                                                                                                                    Guest Domain 1
        ,
                                                                                                (continuous
                                                                                                                                                                            Database 1
                                                                                                                                 ASM Instance + ASM1
availability)                                (fault tolerant)                                                                                                               Instance 1

    .
                                                                                                                                                   Oracle ClusterWare
                                                             .         ,
                                                                                                                                                  Oracle Enterprise Linux
                  .           ,                                                                                                                                                                              Database1

                              . Oracle RAC                                             1a(               Oracle                                     Guest Domain 2
VM                    HA                  Oracle RAC HA                        )                          ,
                                             Oracle RAC HA                                                         .             ASM Instance + ASM 2
                                                                                                                                                                            Database 1
                                                                                                                                                                            Instance 2
        ,                                                                                  1b(Oracle VM
        HA                                Oracle RAC HA                        )                           .                                       Oracle ClusterWare

                              3(             Oracle VM           HA)                                                                              Oracle Enterprise Linux

             .            ,
                                      .                                                                                                                 Domain-0


                                                         .       2(Oracle Clusterware [
                      ]       HA)                                                                                      <     4> Oracle VM    Oracle RAC:

                                                                                                               .
Oracle VM                                   Oracle Clusterware                                          , Oracle                                                                                         Oracle VM
Metalink Note 790189.1 -Oracle Clusterware                                     Application Failover                    Oracle RAC(Oracle RAC on Oracle VM)                                 .
Management                                                                         .                                                             Oracle RAC                                                      .
http://otn.oracle.com/clusterware                                                  .                                                      (Oracle RAC on Oracle VM)
                                                                                                                                                                                 .
Oracle VM                          Oracle VM                                                                   ,
         ,                                                             Oracle RAC                                      Oracle RAC               Oracle VM                                               HA
                  .                                                                                                                                                                                 . SPOF
                                                                                                                                    2        Oracle VM                                              .


                                                                                                                                                                                           <            5>           Oracle
    .                                                        '         (worn-out)'                                     RAC                                                           Oracle VM                        (
                                                                           .                                           2 )            1             Oracle VM                                   .
Oracle VM                 Oracle RAC                                                                                                                                                        .
                                                                                       .                               Oracle RAC                                                Oracle VM
<            4>       Oracle VM                                    /                                                                                                         1                 Oracle VM
Oracle RAC                                     .                                       /                                                                       SPOF(Single Point-Of-Failure)
    , Oracle                      1         Oracle VM                                           1        Oracle              .
54 | 2009 Summer                          Oracle Korea Magazine
*Technology & Developer | Oracle VM                                         Oracle RAC(Real Application Clusters)




                                                                                                                      Oracle RAC
                  Guest Domain 1                                                   Guest Domain 1
                                                                                                                         Oracle RAC               Oracle Clusterware 10.2.0.4                                             .
     ASM Instance             Database 1                                   Database 1          ASM Instance
       + ASM1                 Instance 1
                                                    Database1
                                                                           Instance 1            + ASM 2                       32                 64                                                          .

              Oracle ClusterWare                                                  Oracle ClusterWare
                                                                                                                               Oracle VM
             Oracle Enterprise Linux                                              Oracle Enterprise Linux                      Oracle VM                      : 2.1.2.
                                                                                                                                              Oracle RAC /                             Oracle Clusterware                                      .
                  Guest Domain 2                                                   Guest Domain 2
                                                                                                                         Oracle RAC                            :
     ASM Instance             Database 1                                   Database 2          ASM Instance
       + ASM1                 Instance 1            Database2              Instance 2            + ASM 2                         VCPU                                                            .
                                                                                                                             Oracle RAC VM                                                                                    .
              Oracle ClusterWare                                                  Oracle ClusterWare

             Oracle Enterprise Linux                                             Oracle Enterprise Linux
                                                                                                                      Oracle VM
                                                                                                                                                           (para-virtualized)                                 .
                    Domain-0                                                           Domain-0
                                                                                                                         Oracle Enterprise Linux 5.1                           (OEL 5.1          )

<    5> Oracle VM           Oracle RAC:                                                                                  Oracle VM                            32                   64       Linux                                 .


                                                                                                                      Oracle RAC                  Oracle VM VCPU
                                                                                                                                         ,                 CPU
                                                                                                                                                                                                         .        ,           CPU
Oracle VM                              Oracle RAC                      .
                                                                                                                                              .              , Oracle RAC / VM                               VCPU
                                                                .
                                                                                                                                     .
                                                                                                                         dom-0                Oracle VM                            VCPU                           . Oracle VM          dom-0
                            Oracle VM                Oracle RAC                                                                      CPU                                       1         VCPU                             .
                                                                                                                                             (Oracle RAC                                    )                VCPU                     Oracle VM
    Oracle RAC
                                                                                                                                                   CPU /                           2                                  .
              .
                                                                                                                                                                         VCPU                   Oracle VM                                 CPU /
                   Oracle RAC                                         Oracle VM                                                                                            .
                      .                                                                                                  CPU         (pinning)                                                                    .

                               .                                                                                                                   CPU                                               .


                                                                                                                      VCPU
                                                :
                                                                                                                              1: 8            (                 CPU 2 )
               2          Oracle VM
       Public         Private                                          2          Ethernet NIC
                                                                                                                                                       (                   CPU                   )
         .                                                            3          Ethernet NIC                     .
                                                                                                                         Dom-0       8            VCPU                 (                    )
                                   1      Gbit Ethernet                     .
                                                                                                                                              1(RAC                )   8               VCPU
                                                                                             NIC
                                                                                                                                              2(RAC                )   4               VCPU
                     (4-6       NIC                       ).
                                                                                                                                              3(RAC                )   2               VCPU
                                                     2         HBA              SCSI                          .
                                                                                                                                              4(RAC                )   2               VCPU

                                                :
               Oracle VM
                                                                                                                         Dom-0       4            VCPU                 (                                 )
                                   .
                                                                                                                                             1:                        dom-0 VCPU
                                                                    Oracle VM
                                                                                                                                              1(RAC                )   10               VCPU
                               .
                                                                                                                                             2:              VCPU                  (10) >       CPU           (8)
                                                                                                     .
                                                                                                                                              2(RAC                )   6               VCPU
                                                                                                                                                                                                                55




                              3(RAC            )        8        VCPU                                                                                                       2                               .
                             3:                VCPU (24) >                             CPU       2 (16)

                                                                                                                                 Dom-0

                2: 24             (6-         CPU 4 )                                                                                                                            dom-0                          ,
                                                                                                                                                                                                        .

                                    (CPU                                           )
          Dom-0         24         VCPU                     (                  )
                                                                                                                                                                                                                        .
                              1(RAC            )        12         VCPU
                                                                                                                             dom-0                                   .
                              2(RAC            )        2        VCPU
                              3(RAC            )        4        VCPU                                                             Dom-0                                               Oracle RAC
                              4(RAC            )        6        VCPU                                                                    SAN /
                                                                                                                                         iSCSI /
                                                                                                                                         SAN / OCFS
                                                                                                                                         iSCSI / OCFS
          Dom-0         32         VCPU                     (                            )
                                                                                                                                         NFS
                             1:                         dom-0 VCPU
                              1(RAC            )        28         VCPU                                                                  iSCSI
                             2:           VCPU                  (28) >             CPU          (24)                                     NFS
                              2(RAC                                )       8            VCPU                                 <   1> Oracle RAC

                              3(RAC            )        12         VCPU
                                                                                                                             Oracle VM             Oracle RAC -                       (Best Practice)

Oracle RAC                        Oracle VM                                                                                  Oracle VM               Oracle RAC
Oracle VM                                                                                                                .                                           Oracle RAC
Oracle RAC              Oracle Clusterware                          Oracle VM                                                                                                .
                                                                       .                                                                              .


        Dom-0
         DOM0                           SAN            NAS                                                 NAS               Oracle Clusterware           diagwait


                        DOMO Mgmt                                Workload                     Workload                                                          (CPU                  )        Oracle RAC               ,
                         & Control                               Apps, etc.                   Apps, etc.
                          Domain                                                                                  NFS                    diagwait         13                                       .
                                                   1
                NAS                                                    Guest OS                   Guest OS
                                                                                                                                  (eviction)                           ,
                         NFS Client
                                                   2
                iSCSI                                            Guest VM                     Guest VM                                                . Oracle VM                 Oracle RAC
                        OCFS Storage                                                                             iSCSI
                SAN                                3                           Hypercall API                                                                               diagwait       13
                        Block Devices
                iSCSI                                                          Hypervisor
                                                                                                                                  .
                                                                                                                             diagwait                                Metalink Note 559365.1(Oracle Clusterware
                                              X86/64 Bare-Metal Server
                                                                                                                                                                                                       Diagwait
                         CPU            Mem                                             Mem            CPU
                                                                                                                                            )               .

    1        NFS
    2                    (loop-back)
    3


<        6> Oracle VM
                                                                                                                             Oracle VM                    Domain0                                                   .
                                                                                                                                                           Oracle RAC
56 | 2009 Summer                     Oracle Korea Magazine
*Technology & Developer | Oracle VM                                       Oracle RAC(Real Application Clusters)




         (time drift)                                             .        , Oracle VM          Oracle   Oracle RAC                                      Oracle VM Guest

RAC                                                                             .
                                                                                                         Oracle RAC
        /etc/sysctl.conf            xen.independent_wallclock=1                     (
                                                                                                                                                     .         Oracle RAC 10g                       2
              ).                                  (paravirtualized)
                   .
                                                                                                         RAW                                         . Linux                udev                              Oracle VM

        dom-0            NTPD             .                                                                                                                                        RAW
                                     NTPD                   .                                                                     .
                            Metalink Note 580296.1(OVM                                  Dom-0    Dom-    Oracle RAC                                                                                Oracle Automatic
U                               )                       .                                                Storage Management(ASM)                                                   RAW
                                                                                                             .                 , OS
                                                                                                         ASMLib                                  .
Domain-0

                                                                                                                                                               Oracle VM
Oracle VM                  Oracle RAC                                                      (multipath)
                                                                                                             Guest 1                                                                                           Guest 2
                                                                                                                                  ASM Instance + ASM 1                      ASM Instance + ASM 2
                                          .                                               Domain-0
                                                                                                                                         VBD Driver                              VBD Driver
                                                                                                              /dev/xvda                                                                                      /dev/xvda
                       . Device Mapper, QLogic multipathing
                                      .                                                                      Domain-0
                                                                                                                                                                        /dev/sda
                                                                                                                                                          Multipathing Driver

                                                                                                                                                         SAN Host Bus Adapter
Domain-0                                                              .
                                                                                                                                            port-0                              port-1
                                Linux                           udev                                 .
         VM                                                               . Oracle VM
                                                                                                     .                    SAN Switch 1                                                        SAN Switch 2


                                                                                                                                 Processor 0                  SAN Storage          Processor 1
    <                                         >
    # xen cofig file example for RAC Guest Domain                                                                                                               LUN-1

    name = "vmhost01-g01"
                                                                                                         <    7> Oracle VM       SAN
    memory = "16384"
    disk = [
        'phy:/dev/shared/sdsk-al-120-spb, xvda, x!',                                                                                         ,                                                Oracle RAC
        'phy:/dev/shared/sdsk-al-121-spb, xvdb, x!',
        'phy:/dev/shared/sdsk-al-122-spb, xvdc, x!,
                                                                                                                  .                                              Oracle Cluster File System OCFS2
         ]
    vif = [                                                                                                                                               .
        'mac=00:16:3E:00:00:08, bridge=xenbr0',
        'mac=00:16:3E:10:A5:96, bridge=xenbr1',
         ]
    vfb = ["type=vnc, vncunused=1"]
    uuid = "3d6flde4-626c-e02a-42al-458c9c17e728"
    bootloader="/usr/bin/pygrub"
    vcpus=8
    on reboot = 'restart'
    on crash = 'restart'
                                                                                                                                                                                                                                       57




                                                             Oracle VM                                                                                                             Oracle VM

     Guest 1                                                                                                   Guest 2                  Guest 1                                                                                    Guest 2
                                                     OCFS filesystem                                                                                                    filer01.us.oracle.com/volume01
                                                                                                                                        /u01/oradata                                                                          /u01/oradata
                                 VBD Driver                                        VBD Driver
     /dev/xvda                                                                                               /dev/xvda                     Public         Private         Storage                Public       Private              Storage
                                                                                                                                          network         network         network               network       network              network
     Domain-0                                                                                                                               eth0              eth1          eth2                  eth0             eth1             eth2
                                                                         /dev/sda
                                                   Multipathing Driver
                                                                                                                                        Domain-0
                                                  SAN Host Bus Adapter
                                         port-0                                    port-1                                                            xenbr0                           xenbr1                              xenbr2

                                                                                                                                                     bond0                            bond1                               bond2

                                                                                                                                            eth0               eth1            eth2             eth3              eth4              eth5

                 SAN Switch 1                                                                 SAN Switch 2


                             Processor 0                SAN Storage                     Processor 1

                                                                                                                                     Pubic Network     Pubic Network    Private Network Private Network Storage Network Storage Network
                                                                 LUN-1                                                                 Switch 1          Switch 2           Switch 1        Switch 2       Switch 1        Switch 2

<    8> CFS           Oracle VM            SAN                                                                                                                  NetApp Filer: filer01.us.oracle.com
                                                                                                                                                                       Exported volume: volume01


                                                                                                                                 <     9> Oracle VM




Oracle VM                                  2                                                NIC                                  Oracle RAC                   Oracle VM

                                               NIC                             .            NIC                                                                                                                               Oracle VM
                                .           Oracle RAC                                                                                                                          . Oracle VM
                                                         .                                                                                                     Oracle RAC                                                 .

     1.       (Public)                                                                                                                                           .
     2.       (Private)
     3.                          (                           )                                                                   CPU


          Oracle VM                                                                                                      .       dom-0                                 VCPU
                                     Oracle VM                                              Oracle RAC VM                                            .2                                                                                      .
                         .                                                                                                   .


              (Network Bonding)
                                                                                                                                              Oracle VM                                                      . Oracle RAC VM
                                                                         NIC(Network Interface Controller)                                                                                               Domain-0, Linux                         ,
                                     (Linux bonding)                                                                             Oracle Clusterware                                                               Oracle RAC
                  .                 ,<            9> (                                                         )                                                                                              .
    Oracle RAC                              Oracle VM                                           4      NIC(
                                                    )                               .
                                                                                                                                 Oracle VM                      Oracle RAC                                                    Oracle VM
                                                                                                                                                               2        NIC                              .
                                                                                                                                                          4                                                                                  .
                                                                                                                                                                   Oracle VM
58 | 2009 Summer                              Oracle Korea Magazine
*Technology & Developer | Oracle VM                                             Oracle RAC(Real Application Clusters)




                                          .                                         1GBit Ethernet                                                                                     (Oracle)
                                          (                              1 Gbit Ethernet                        ).                                                                                                .
                            VM
                                                                                                                                                    Core Router1                 Core Router2

        VM
    .                                                     Domain-0                                                       .
                                                                                                                                                                 Public Network                                    Private Network




Oracle VM                       Oracle RAC                       SAN                                    Oracle VM                Oracle VM Host 1                                          Oracle VM Host 2                                    Oracle VM Host 3

                                                                                                        HBA
                                                                                                                                                                        Cluster 1
           .                                                                                                         .
NAS                (                           iSCSI         )
                                                                                                                                                                        Cluster 2
                   NAS                                                               .
          (Public)                                   (Interconnect)                                                                                                     Cluster 3

               .                  NIC                                     NIC            SPOF(Single-Point-
                                                                                                                                                Domain-0                                       Domain-0                                  Domain-0
Of_Failure)
                                      .
                                                                                                                                              SAN Switch 1                                                                             SAN Switch 2


Oracle VM                Oracle RAC
                                                                                                                                                                  Domain-0                 SAN Storage                  Domain-0
               Oracle VM                           Oracle RAC                                                            .
                                                                                                                                                                                             LUN-2                                        Storage System
                                  .
                                                                                                                                                                           LUN-1
                                                                 .
 Oracle RAC                                                Oracle VM 2.1.2                      .
                                                                                                                             <          10>
                                  Oracle VM Server                                        .
                                                   Oracle VM                    Domain-0                    ,                                    Oracle VM                                 Oracle RAC                                                             .
                                      .                                                                                                                                                /
 Oracle RAC                                           (para-virtualized)
                                                                                                                                                   URL                                     (                   Oracle
                                                                     .
                                                                                                                             Oracle                                               .
 Oracle VM Manager                                        . Oracle VM Server                            4
                                          .                                                                                          ).
                                                            (Oracle Enterprise Linux 5.1). Oracle                            http://www.oracle.com/technology/global/kr/pub/articles/wartak-rac-vm.html
 Clusterware           Oracle RAC
                                          . udev                     Oracle RAC 10g                 2
                                                                                                                                        : Oracle VM         Oracle RAC(Real Application Clusters)             , 2009   4 ,     1.4
 raw                        .                      , OS                                                                                       : Wim Coekaerts, Adam Hawley, Rene Kundersma, Barb Lundhild, Michael Timpanaro-Perrotta, Nitin Vengurlekar

        ASMLib                                 .
                                                                                              Oracle Clusterware                 Oracle RAC              : http://otn.oracle.com/rac
                                                                                                                                 Oracle Clusterware                          http://otn.oracle.com/clusterware
   Oracle RAC 10.2.0.4                              . Oracle Enterprise Linux 5           Oracle 10gR2
                                                                                                                                 Oracle ASM                           http://otn.oracle.com/asm
                                                           Metalink note 414163.1( Oracle EL5, RHEL5                             Oracle VM              : http://www.oracle.com/virtualization
                                                                                                                                 Oracle VM       Oracle Enterprise Manager 10.2.0.5               : www.oracle.com/technology/software/products/oem/index.html
        SLES10              10gR2 RAC                        )                  .                                                                             : www.oracle.com/corporate/pricing/partitioning.pdf
                                                                                                                                 Oracle VM                         : www.oracle.com/technology/tech/virtualization/pdf/ovm-hardpart.pdf
                                                                                                                                 Linux           Oracle Clusterware     Oracle Real Application Clusters Installation Guide 10g Release 2 (10.2) -1.2


                                                                                                                                 Wiki     Oracle VM : http://wiki.oracle.com/Oracle+VM
Oracle VM                                                  Oracle RAC                                   ,                        Oracle ASMLib: http://www.oracle.com/technology/tech/linux/asmlib/index.html
                                                                                                                                 Oracle RAC           : http://download.oracle.com/docs/cd/B19306_01/install.102/b14203/toc.htm
                        <         10>

								
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