frank+lists/z...@linetwo.net said: > I remember, and this was a few years back but I don't see why it would be any > different now, we were trying to add drives 1-2 at a time to medium-sized > arrays (don't buy the disks until we need them, to hold onto cash), and the > Netapp performance kept going down down down. We eventually had to borrow an > array from Netapp to copy our data onto to rebalance. Netapp told us > explicitly, make sure to add an entire shelf at a time (and a new raid group, > obviously, don't extend any existing group).
The advent of aggregates fixed that problem. Used to be that a raid-group belonged to only one volume. Now multiple flex-vols (even tiny ones) share all the spindles (and parity drives) on their aggregate, and you can rebalance after adding drives without having to manually move/copy existing data. Pretty slick, if you can afford the price. Regards, Marion _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
