On Wed, Oct 20, 2010 at 5:00 PM, Richard Elling <richard.ell...@gmail.com> wrote: >>> Now, is there a way, manually or automatically, to somehow balance the data >>> across these LVOLs? My first guess is that doing this _automatically_ will >>> require block pointer rewrite, but then, is there way to hack this thing by >>> hand? >> >> >> I described a similar issue in >> http://opensolaris.org/jive/thread.jspa?threadID=134581&tstart=30. My >> solution was to copy some datasets over to a new directory, delete the >> old ones and destroy any snapshots that retain them. Data is read from >> the old device and written on all, causing large chunks of space to be >> freed on the old device. >> >> I wished for a more aggressive write balancer but that may be too much >> to ask for. > > This can, of course, be tuned. Would you be interested in characterizing the > benefits and costs of a variety of such tunings?
If you're asking whether I wish to test and document my findings with such tunables, then yes, I'm interested, though this is a home file server so it's not exactly laboratory environment. I also think I can produce enough spare parts to do synthetic tests (maybe in a VM environment). I was not aware of such tunables, though it appeared there might be some emergency mode when a vdev has only a few percent space left. My server is currently running OI_147 but I haven't yet upgraded the pool so it's still version 14. I also have 111b and 134 boot environments standing by. -- - Tuomas _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
