Short answer: No. Long answer: Not without rewriting the previously written data. Data is being striped over all of the top level VDEVs, or at least it should be. But there is no way, at least not built into ZFS, to re-allocate the storage to perform I/O balancing. You would basically have to do this manually.
Either way, I'm guessing this isn't the answer you wanted but hey, you get what you get. On Tue, Aug 3, 2010 at 13:52, Eduardo Bragatto <edua...@bragatto.com> wrote: > Hi, > > I have a large pool (~50TB total, ~42TB usable), composed of 4 raidz1 > volumes (of 7 x 2TB disks each): > > # zpool iostat -v | grep -v c4 > capacity operations bandwidth > pool used avail read write read write > ------------ ----- ----- ----- ----- ----- ----- > backup 35.2T 15.3T 602 272 15.3M 11.1M > raidz1 11.6T 1.06T 138 49 2.99M 2.33M > raidz1 11.8T 845G 163 54 3.82M 2.57M > raidz1 6.00T 6.62T 161 84 4.50M 3.16M > raidz1 5.88T 6.75T 139 83 4.01M 3.09M > ------------ ----- ----- ----- ----- ----- ----- > > Originally there were only the first two raidz1 volumes, and the two from > the bottom were added later. > > You can notice that by the amount of used / free space. The first two > volumes have ~11TB used and ~1TB free, while the other two have around ~6TB > used and ~6TB free. > > I have hundreds of zfs'es storing backups from several servers. Each ZFS > has about 7 snapshots of older backups. > > I have the impression I'm getting degradation in performance due to the > limited space in the first two volumes, specially the second, which has only > 845GB free. > > Is there any way to re-stripe the pool, so I can take advantage of all > spindles across the raidz1 volumes? Right now it looks like the newer > volumes are doing the heavy while the other two just hold old data. > > Thanks, > Eduardo Bragatto > _______________________________________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss > -- "You can choose your friends, you can choose the deals." - Equity Private "If Linux is faster, it's a Solaris bug." - Phil Harman Blog - http://whatderass.blogspot.com/ Twitter - @khyron4eva
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