Hi List, Thanks to Anthony D'Atri, DRoss-Smith, Chris Hoogendyk, Chris Banal, Hendrik Visage, Karl Fosburg, Francisco Roque, Eric D. Mudama Who all basically said not to put all the disks into a single raidz vdev for varying reasons. These included - Increased impact from disk failures. RAIDZ can tolerate two failures, anymore and the whole data needs restored (from tape) - Increased time to rebuild array from a single drive failure as the rebuild will need to access all the drives in the array. - The number of drives in a RAIDZ set should not exceed 9 drives (any more than 6 is viewed as "risky") Other general feedback included -RAIDZ is really only suited for large IO and if performance is more important look at mirrors (with the tradeoff of less usable space). -More RAIDZ pools gives better performance from an IOPS point of view than one large RAIDZ vdev. -There's a ZFS best practices guide at http://www.solarisinternals.com/wiki/index.php/ZFS_Best_Practices_Guide Thanks to you all for the constructive feedback - I am going to go with the first layout. Cheers, Iain. -- Iain Miller iainonthemove@gmail.com _______________________________________________ sunmanagers mailing list sunmanagers@sunmanagers.org http://www.sunmanagers.org/mailman/listinfo/sunmanagersReceived on Wed Jul 22 06:02:15 2009
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