Hi Bob
For a storage subsystem 'COMSTAR in itself' is only a component. Other
components are HBA, PCI, CPU, backend storage etc. Each one of those
influence the performance. But so far here is what we have found. Our
reference platform is x4500 (Thumper) and we use zfs raidz zvols as our
backend. Also the protocol for these tests is FC using Qlogic 4G HBAs.
I have to also note here that most of this is done as a part of our
performance regression testing, the purpose of which is to make sure
that any bugfixes we make don't regress the performance. There is no
formal performance data yet.
Max IOPS (Hitting the backend cache):
90K using one HBA(2 ports), 130K using 2 HBAs (4 ports)
Random IOPS (not hitting the backend cache at all). In this case the
backend is just all the 47 disks with no filesystem on them. Note that
this also requires some changes that went into B96 of SXCE.
4.3K (Limited by backend seek)
Max throughput (large block I/O)
760 MB/s (one HBA, 2 ports, reads)
850 MB/s (one HBA, 2 ports, read/write)
Sumit
Bob Friesenhahn wrote:
> COMSTAR seems quite promising and useful. Is there any benchmark data
> yet to compare COMSTAR + ZFS to a normal hardware-based RAID array?
> For example, test performance with fiber channel direct to a RAID
> array, and then (using same array hardware for storage) with COMSTAR +
> ZFS?
>
> It is useful to know if COMSTAR + ZFS boosts performance due to ZFS
> RAID smarts, much more powerful CPU, and massive caching in RAM, or if
> going through Solaris kernel and ZFS adds latency which hurts
> performance.
>
> Bob
> ======================================
> Bob Friesenhahn
> [EMAIL PROTECTED], http://www.simplesystems.org/users/bfriesen/
> GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
>
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>
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