Please add to the list the differences on locally or remotely attach vdevs: FC, SCSI/SATA, or iSCSI. This is the part that is troubling me most, as there are wildly different performance characteristics when you use NFS with any of these backends with the various configs of ZFS. Another thing is when where cache should be or not be used on backend RAID devices (RAID vs JBOD point made already).
The wild difference is between small and large file writes, and how the backend can go from 10's of MB/sec to 10's of KB/sec. Really. On 6/1/06, Erik Trimble <[EMAIL PROTECTED]> wrote:
Maybe the best thing here is to have us (i.e. the people on this list) come up with a set of standard and expected use cases, and have the ZFS team tell us what the relative performance/tradeoffs are. I mean, rather than us just asking a bunch of specific cases, a good whitepaper Best Practices / Cookbook for ZFS would be nice. For instance: compare UFS/Solaris Volume Manager against ZFS in: [random|sequential][small|large][read|write] on UFS/SVM: Raid-1, Raid-5, Raid 0+1 ZFS: RaidZ, Mirrors Relative Performance of HWRaid vs JBOD e.g. 3510FC w/ RAID using ZFS vs 3510FC JBOD using ZFS I know a bunch of this has been discussed before (and I've read most of it :-), but collecting it in one place and filling out the actual analysis would be Really Nice. -- Erik Trimble Java System Support Mailstop: usca14-102 Phone: x17195 Santa Clara, CA Timezone: US/Pacific (GMT-0800) _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
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