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					2730/2730T/5730
Performance Comparison
20 May 2008
NDA Notification
 This presentation contains information related to projects that are currently in
 planning and/or development stages. This information represents the current
 intentions of Dot Hill Systems. However, all aspects of these projects, including,
 but not limited to funding, availability, shipping dates, configurations, capacities,
 performance, and all other characteristics are subject to change and/or
 cancellation without notice.

 This material is confidential to Dot Hill Systems and should be disclosed to
 external entities only under the terms of an executed non-disclosure agreement
 (NDA).

 Distribution of this material to Dot Hill Systems Field Representatives should be
 done through the Dot Hill Systems NDA process.

 The information contained herein is considered privileged, confidential and
 protected from disclosure. If you are not the intended recipient or their
 employee/agent responsible for its delivery, you are requested to refrain from
 any duplication or distribution of this message or its contents, in respect of the
 rights of the designated recipient and sender, and to delete it from your computer.


                    Dot Hill Systems Confidential / Covered under NDA            2
About This Presentation
   • Project Name “Neptune” refers to the 2730/2730T
   • Project Name “Krypton” refers to the 5730
   • The performance information contained in this
     presentation was obtained within the Engineering
     Verification Lab using IOMeter
   • Actual performance results within specific
     application use may vary from the contents of this
     presentation
   • This information is provided only as a reference
     point and no “performance tuning” has been
     applied

              Dot Hill Systems Confidential / Covered under NDA   3
2730 vs. 5730 Quick Reference
Sequential Access   2730/2730T             5730                  Comments

Read Disk           Fail-Over: 550 MB/s    Fail-Over: 790 MB/s 5730 44% faster read throughput
Bandwidth           Active/Active: 1100    Active/Active: 1580         •    PCIX/DDR dependent
                    MB/s                   MB/s
(RAID5)                                                                •    CPU independent

Write Disk          Fail-Over: 340/380     Fail-Over: 575 MB/s 5730 34% faster write throughput
                    MB/s
Bandwidth                                  Active/Active: 980          •    PCIX/DDR dependent primarily
                    Active/Active: 640/730 MB/s
(RAID5)                                                                •    CPU dependent on lower end
                    MB/s
Read Disk IOps      Active/Active: 29K/48K Active/Active:        5730 330% faster read transactions
                    IOPs                   112K/160K IOPs
                                                                       •    PCIX/DDR independent
                                                                       •    CPU dependent

Read Cache Hit      Active/Active:         Active/Active:        Same sector transaction rate shows the power of
                    100K/150K IOPs         320K/375K IOPs        5730 FC target and CPU low latency performance
Same Sector

Write Disk IOps     Active/Active: 11K/19K Active/Active:        5730 215% faster write transactions
                    IOPs                   33K/41K IOPs
(RAID5)                                                                •    PCIX/DDR independent
                                                                       •    CPU dependent



                            Dot Hill Systems Confidential / Covered under NDA                            4
5730 (5730) Performance Quick Reference
        Random Transaction Performance

        Controller                 Host     VDisk       Measurement
        Configuration              Access   Type
        Dual (Active/Active)       Read     All         24.9K IO/s
        Single (Fail-Over)         Write    RAID5       5.4K IO/s
        Dual (Active/Active)                RAID6       4.1K IO/s
                                            RAID0       3.1K IO/s
                                            RAID10      13.0K IO/s
                                                        8.3K IO/s
        Sequential Bandwidth Performance

        Controller        Host        VDisk          Measurement      Reference / Comments
        Configuration     Access      Type
        Dual              Read        All            1580MB/s         Four hosts systems connected, each accessing one LUN,
        (Active/Active)                                               two LUNs owned per controller.
                                                                      Note: RAID10 requires additional total drives to meet
                                                                      maximum number.
        Dual              Write       RAID0          1271 MB/s
        (Active/Active)               RAID5          987 MB/s
                                      RAID6          914 MB/s
                                      RAID10         882 MB/s
                                      RAID50         1003 MB/s
        Sequential Transaction Performance

        Controller                 Host   VDisk Type Measurement         Comments / Reference
        Configuration              Access
        Dual (Active/Active)       Read   RAID5      143.1K IO/s         Four hosts systems connected, each accessing one
                                                     160K IO/s           LUN, two LUNs owned per controller.
        Single (Fail-Over)         Write  RAID5      39.4K IO/s
        Dual (Active/Active)                         25.5K IO/s
        Dual (Active/Active)       Same   N/A        375K IO/s           512B read same sector (cache hit) access using four
                                   Sector                                hosts systems connected, each accessing one LUN,
                                                                         two LUNs owned per controller.
                      Dot Hill Systems Confidential / Covered under NDA                                                  5
2730T vs. 5730 in RAID 5 & 6
            RAID 5 & 6 Sequential Write with 48 drives
                  Krypton AA SAS 48 Drives                                Neptune-T Write                Krypton Single Controller SAS 48 Drives                        Neptune-T Write
 (IOPs)           Sequential Performance (Base-2)                         Krypton Write           (IOPs) Sequential Performance (Base-2)                                Krypton Write
30000.0                                                                                          45000.0
                    25481




                                                                 K100B24p vs J200B26p                                                                           K100B24p vs J200B26p
                                                                                                 40000.0
                                                                 Vdisk = 12-Drive RAID5                                                                         Vdisk = 12-Drive RAID6




                                                                                                                   39409
25000.0
                                                                 4 Vdisk, 2/Cntl, 1 LUN/Vdisk    35000.0                                                        4 Vdisk, 1 LUN/Vdisk
                                                                 Win2003 Server MPIO                                                                            Win2003 Server MPIO
20000.0                                                                                          30000.0
          16965




                                                                 4 Port x 4Gb FC switched                                                                       4 Port x 4Gb FC switched
                                                                 Single Client access/LUN        25000.0                                                        Single Client access/LUN




                                                                                                           17853
15000.0                                                          Qd = 16/LUN                                                                                    Qd = 16/LUN
                                                                                                 20000.0

10000.0                                                                                          15000.0

                                                                                                 10000.0
 5000.0
                                                                                                  5000.0

    0.0                                                                                              0.0
             0.5K           1K   2K      4K     8K   16K   32K    64K   128K 256K 512K      1M              0.5K           1K   2K    4K      8K    16K   32K    64K   128K 256K 512K      1M
                                      (block size)                                                                                   (block size)


    5730’s storage controller processor accounts for the higher sequential write transaction
    performance both Active/Active and failed over. 5730 sustains between 150% and 220% higher
    write transaction performance than 2730T at deeper queued small block host request sizes.


                                                      Dot Hill Systems Confidential / Covered under NDA
2730T vs. 5730 in RAID 5 & 6
          RAID 5 & 6 Sequential READ with 48 drives
             Krypton AA SAS 48 Drives                              Neptune-T Read                                                                      Neptune-T Read
(MB/s)                                                                                     (MB/s) Krypton Single Controller SAS 48 Drives
             Sequential Performance (Base-2)                       Krypton Read                    Sequential Performance (Base-2)                     KryptonRead
1600.0                                                                                     900.0

          K100B24p vs J200B26p                                                                     K100B24p vs J200B26p
1400.0                                                                                     800.0
          Vdisk = 12-Drive RAID5                                                                   Vdisk = 12-Drive RAID6
          4 Vdisk, 2/Cntl, 1 LUN/Vdisk                                                     700.0   4 Vdisk, 1 LUN/Vdisk
1200.0
          Win2003 Server MPIO                                                                      Win2003 Server MPIO
                                                                                           600.0
1000.0    4 Port x 4Gb FC switched                                                                 4 Port x 4Gb FC switched
          Single Client access/LUN                                                         500.0   Single Client access/LUN
 800.0                                                                                             Qd = 16/LUN
          Qd = 16/LUN                                                                      400.0
 600.0
                                                                                           300.0
 400.0
                                                                                           200.0

 200.0                                                                                     100.0

   0.0                                                                                       0.0
          0.5K   1K     2K       4K         8K   16K   32K   64K    128K   256K     512K           0.5K   1K    2K      4K      8K   16K   32K   64K    128K   256K     512K
                             (block size)                                                                            (block size)



         5730 controller read bandwidth is 800MB/s per controller versus 2730T peaking at 570MB/s. 5730 sustains
         40% higher read throughput then 2730T at large block sizes.

         The Active/Active 5730 read performance in the curve is limited by the four port FC host. 5730 Active/Active
         read performance can sustain 1600MB/s with multiple host systems accessing.
                                                  Dot Hill Systems Confidential / Covered under NDA
5730 Scalability Testing (24 – 60 Drives)
     Active/Active Controller Random Read/Write




Drive numbers have a much larger affect on random performance. For reads there is almost a direct
correlation between the total number of drives accessed and the total random transaction IOPS. The drive
random access performance is the limiting factor for reads in general.

Writes top out at 48 drives. Additional drives won’t improve random write numbers. The limit becomes the
controller processing and cache algorithm.
                              Dot Hill Systems Confidential / Covered under NDA
 5730 Max Configuration (108 Drive)
            Sequential Reads/Writes for Active/Active (Throughput & IOPS)


                    Krypton AA SAS 108 Drives                         Sum 2x Host Reads                               Krypton AA SAS 108 Drives                                            Sum 2x Host Reads
(MB/s)                                                                                                     (IOPs)
                    Sequential Performance (Base-2)                   Sum 2x Host Writes                              Sequential Performance (Base-2)                                      Sum 2x Host Writes
                                                                                                           150000.0
1500.0




                                                                                                                         143136
          K100A17p




                                                                                         1436
1400.0                                                                                                     140000.0                                                          K100A17p
          Vdisk = 4xRAID50x27Drives(3x9)                                                                   130000.0
1300.0                                                                                                                                                                       Vdisk = 4xRAID50x27Drives(3x9)
          1 LUN / Vdisk, Qd = 8 / LUN
1200.0                                                                                                     120000.0                                                          1 LUN / Vdisk, Qd = 32 / LUN
          Two Win2003 Hosts MPIO
                                                                                                           110000.0                                                          Two Win2003 Hosts MPIO
1100.0    2 port x 4Gb FC / Host




                                                                                                     980
                                                                                                           100000.0
                                                                                                                                                                             2 port x 4Gb FC / Host
1000.0    Each host accesses all 8 LUNs
                                                                                                                                                                             Each host accesses all 8 LUNs
 900.0                                                                                                      90000.0

 800.0                                                                                                      80000.0
 700.0                                                                                                      70000.0
 600.0                                                                                                      60000.0
 500.0                                                                                                      50000.0




                                                                                                                             25158
 400.0                                                                                                      40000.0
 300.0                                                                                                      30000.0
 200.0                                                                                                      20000.0
 100.0                                                                                                      10000.0
   0.0                                                                                                          0.0
          0.5K    1K      2K      4K       8K   16K     32K   64K   128K   256K   512K          1M                    0.5K           1K   2K   4K       8K      16K    32K   64K    128K    256K    512K       1M
                           (block size)                                                                                                                 (block size)


         The RAID50 VDisk in this configuration is 27-drives, with 3 sub-arrays of 9-drive RAID5.

         In this test configuration two dual port host systems are connected through the switch to 5730. Each host
         accesses the 4 LUNs presented by the 5730 Active/Active RAID system. Each host issues a queue depth /
         LUN, therefore each LUN sees 2x the total queue depth of each host.

                                                      Dot Hill Systems Confidential / Covered under NDA

				
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