Hi! We've put 28x 750GB SATA drives in a RAIDZ2 pool (a single vdev) and we get about 80MB/s in sequential read or write. We're running local tests on the server itself (no network involved). Is that what we should be expecting? It seems slow to me. Please read the ZFS best practices guide at http://www.solarisinternals.com/wiki/index.php/ZFS_Best_Practices_Guide To summarise, putting 28 disks in a single vdev is nothing you would do if you want performance. You'll end up with as many IOPS a single drive can do. Split it up into smaller (<10 disk) vdevs and try again. If you need high performance, put them in a striped mirror (aka RAID1+0) A little addition - for 28 drives, I guess I'd choose four vdevs with seven drives each in raidz2. You'll loose space, but it'll be four times faster, and four times safer. Better safe than sorry.... Vennlige hilsener / Best regards roy -- Roy Sigurd Karlsbakk (+47) 97542685 [email protected] http://blogg.karlsbakk.net/ -- I all pedagogikk er det essensielt at pensum presenteres intelligibelt. Det er et elementært imperativ for alle pedagoger å unngå eksessiv anvendelse av idiomer med fremmed opprinnelse. I de fleste tilfeller eksisterer adekvate og relevante synonymer på norsk.
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