Oracle_Exadata-RDMA_Attached_Storage

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					        RDMA Attached Storage




   Bob Pearson - System Fabric Works

www.openfabrics.org
RDMA Attached Storage

How does it work?
Why is it interesting?
hat is available today?
SFW and storage




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How does it work?

     System           IO Virtual                   Controller   Persistent
     Memory           Memory          CDB          Buffers      Storage

                                   Data Transfer




                                     Status
      TODO list for user
      1. Create (fast) MR
      2. Send CDB
      3. Read Status



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How does an HBA work?

     System                                 Controller   Persistent
     Memory           HBA                   Buffers      Storage
                               CDB

                            Data Transfer




                              Status




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Both RDMA solution and HBA solutions are
 very efficient for the storage client
RDMA solution is just software using a
 general purpose IO channel with a rich set of
 transports




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What is out there?

  Conventional products                 RDMA based solutions
   SAN                                  SAN
        FCP (SCSI/FC)                          SRP (SCSI(+)/IB or iWARP)
        SAS (SCSI/serial link)                 iSER (iSCSI(+)/IB or iWARP)
        iSCSI (SCSI/TCP/IP/Ethernet)    NAS
   NAS                                         rNFS (NFS(+)/IB or iWARP)
        NFS (NFS/TCP/IP/Ethernet)       PFS
   PFS (parallel file systems)                 Lustre(+), gpfs(+)
        Pnfs, lustre, gpfs, etc.        Intelligent Storage
   Intelligent Storage                         E.g. Oracle Exadata
        E.g. Data bases
                                        (+)   plus RDMA

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Why is it interesting?

High (relative) performance
      As efficient as specialized adapters with very low
       overhead, and similar cost
High (absolute) performance
      4X absolute performance advantage today
Flexibility
      One interface supports entire range of storage
       types DAS/SAN/NAS and beyond

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System Fabric Works

 SFW is a service oriented company
 Our goal is to provide a broad range of
  professional services for RDMA fabric
  technologies and OFA software
 RDMA storage and file systems have been a
  major part of our practice including:
      Development of RDMA software solutions for
       storage OEMs
      Integration of RDMA storage solutions for end users
      Specialized storage solutions HW and SW

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posted:6/22/2012
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