> Is there any way to decrease fragmentation of dr_tank ? > > ------------------------------ > > zpool list (Sum of RAW disk capacity without redundancy counted) > > ------------------------------ > > NAME SIZE ALLOC FREE EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT > > dr_slow 9.06T 77.6M 9.06T - 0% 0% 1.00x ONLINE - > dr_tank 48.9T 35.1T 13.9T - 23% 71% 1.00x ONLINE - > rpool 272G 42.1G 230G - 10% 15% 1.00x ONLINE -
Note that 'FRAG' probably doesn't mean what you expect it to mean, and you probably don't need to worry about it. The ZFS FRAG percentage here is how fragmented *free space* is, not how fragmented your data is, and the details are arcane. A pool with low FRAG has most of its free space in large contiguous segments; a pool with high FRAG has most of the free space broken up into small pieces. FRAG is essentially a measure of how hard ZFS will have to work to find space for new data. For more details, you can read: https://utcc.utoronto.ca/~cks/space/blog/solaris/ZFSZpoolFragmentationMeaning https://utcc.utoronto.ca/~cks/space/blog/solaris/ZFSZpoolFragmentationDetails (These were current as of late 2015, but the details might have changed slightly since then.) - cks _______________________________________________ OmniOS-discuss mailing list OmniOS-discuss@lists.omniti.com http://lists.omniti.com/mailman/listinfo/omnios-discuss
