I hear everyone's concerns about multiple parity disks. Are there any benchmarks or numbers showing the performance difference using a 15 disk raidz2 zpool? I am fine sacrificing some performance but obviously don't want to make the machine crawl.
It sounds like I could go with 15 disks evenly and have to sacrifice 3, but I would have 1 parity disk on each 7 disk raidz1 zpool and a hot spare to cover a failure on either pool: zpool create tank \ raidz disk1 disk2 disk3 disk4 disk5 disk6 disk7 \ raidz disk8 disk9 disk10 disk11 disk12 disk13 disk14 \ spare disk15 That's pretty much dual parity/dual failure for both pools assuming I swap out the dead drive pretty quickly. Yeah? And terminology-wise, one or more zpools create zdevs right? Oh, and does raidz2 provide more performance than a raidz1 as it is kind of like dual parity and can split up the parity traffic over two devices? Thanks :) This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
