I have two storages, both on snv133. Both filled with 1TB drives. 1) stripe over two raidz vdevs, 7 disks in each. In total avalable size is (7-1)*2=12TB 2) zfs pool over HW raid, also 12TB.
Both storages keeps the same data with minor differences. First pool keeps 24 hourly snapshots + 7 daily snapshots. Second one (backup) keeps only daily snapshots, but for longer period (2 weeks for now). But they reports strangely different sizes which can't be explained by differences in snapshots I believe. 1) # zpool list export NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT export 12.6T 3.80T 8.82T 30% 1.00x ONLINE - # zfs list export NAME USED AVAIL REFER MOUNTPOINT export 3.24T 7.35T 40.9K /export 2) # zpool list export NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT export 12.6T 3.19T 9.44T 25% 1.00x ONLINE - # zfs list export NAME USED AVAIL REFER MOUNTPOINT export 3.19T 9.24T 25K /export As we see, both pools have the same size according to "zpool". As we see, for second storage size reported by "zpool list" and sum of used and avail in "zfs list" are in agreement. But for first one, 2TB is missing somehow, sum of USED and avail is 10.6 TB. Also what makes me a bit wonder, is that I would expect more space to be used on backup pool (more daily snapshots), but if "zfs list" can be explained that amount taken by hourly snapshots is bigger than amount taken by extra 7 daily snapshots on backup storage (difference is 50GB which is still pretty big, taking into account that on backup storage we have also extra 10 gig of backup of rpool from primary storage), there is no way for this explanation to be valid for difference in USED reported by "zpool list". 600GB is much more than any possible difference coming from storing different snapshots, because our guys just don't produce so much of data daily. Also I tried to look how much of space is refereed by hourly snapshots - no way to be even close to 600GB. What's wrong there? My main concern, though, is difference between zpool size and sum of used+avail for zfs on primary storage. 2TB is 2TB! -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
