Discussion in 'Windows Server' started by Antonio Jose Rodrigues Neto, Sep 3, 2004.

  1. [Only looking at Performance issues]

    Hi All,

    Sorry for wide distribution, but I would like to clarify my understanding
    about Performance - iSCSI vs Fibre Channel.

    For some time, I've been reading some performance books (e.g. Storage
    Network Performance Analysis (Huseyin Simitci), The Art of Computer Systems
    Performance Analysis (Raj Jain) and others) to understand some issues.

    I'd like to understand why the "Storage Market" is labeling iSCSI as a
    solution for small and midrange environments (departamental) and Fibre
    Channel as a solution for high-end environments (enterprise). In my opinion
    we can get high performance with iSCSI solution to address high-end

    In my opinion the fact to decide to go with iSCSI or FCP is related to the
    Application requirements (throughput, %CPU) and not a basic comparation
    between one protocol with another.

    Question: What does it mean small, midrange and high environments?

    For example, in the book "Practical Storage Area Networking" - Daniel
    Pollack, on page 36, he writes
    Table 2.2 - I/O Performance Ranges

    Host IOPS Channel IOPS
    Host Bandwith Channel Bandwith

    Low 0-3000 0-500
    0-50 MB/s 0-10 MB/s

    Average 3000-20000 500-1500
    50-200 MB/s 10-40 MB/s

    High > 20000 1500-10000
    200+ MB/s 40-100 MB/

    Do you agree with this table? Should we use a table like this to recommend
    iSCSI or FCP protocol ?

    Without a guideline is hard to define what protocol should be used.


    All the best my friends,

    Antonio Jose Rodrigues Neto, Sep 3, 2004
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