Same dataset on two pools are different sizes?
Added by Ryan W about 1 year ago
After my tank crash a couple weeks back I'm finally getting data back on the disks. raidpool/GCMSBackup dataset is what I copied OFF my old tank pool as read only. It's 121G with 1.92x compression. When I copied (not zfs send|receive) raidpool/GCMSBackup back to tank/GCMSBackup the compression level is still 1.92x (same compression algorithm) but the dataset is 7GB larger. The only difference I can think of is the fact that tank has twice as many disks and perhaps it's extra partity metadata or something along those lines?
Neither dataset has snapshots as evident by the info below:
root@calculon:/volumes# zfs get all raidpool/GCMSBackup NAME PROPERTY VALUE SOURCE raidpool/GCMSBackup type filesystem - raidpool/GCMSBackup creation Mon Dec 5 22:48 2011 - raidpool/GCMSBackup used 121G - raidpool/GCMSBackup available 364G - raidpool/GCMSBackup referenced 121G - raidpool/GCMSBackup compressratio 1.92x - raidpool/GCMSBackup mounted yes - raidpool/GCMSBackup quota none default raidpool/GCMSBackup reservation none default raidpool/GCMSBackup recordsize 128K default raidpool/GCMSBackup mountpoint /volumes/raidpool/GCMSBackup inherited from raidpool raidpool/GCMSBackup sharenfs off default raidpool/GCMSBackup checksum on default raidpool/GCMSBackup compression on local raidpool/GCMSBackup atime on default raidpool/GCMSBackup devices on default raidpool/GCMSBackup exec on default raidpool/GCMSBackup setuid on default raidpool/GCMSBackup readonly off default raidpool/GCMSBackup zoned off default raidpool/GCMSBackup snapdir hidden default raidpool/GCMSBackup aclmode discard default raidpool/GCMSBackup aclinherit restricted default raidpool/GCMSBackup canmount on default raidpool/GCMSBackup xattr on default raidpool/GCMSBackup copies 1 default raidpool/GCMSBackup version 5 - raidpool/GCMSBackup utf8only off - raidpool/GCMSBackup normalization none - raidpool/GCMSBackup casesensitivity sensitive - raidpool/GCMSBackup vscan off default raidpool/GCMSBackup nbmand off default raidpool/GCMSBackup sharesmb off local raidpool/GCMSBackup refquota none default raidpool/GCMSBackup refreservation none default raidpool/GCMSBackup primarycache all default raidpool/GCMSBackup secondarycache all default raidpool/GCMSBackup usedbysnapshots 0 - raidpool/GCMSBackup usedbydataset 121G - raidpool/GCMSBackup usedbychildren 0 - raidpool/GCMSBackup usedbyrefreservation 0 - raidpool/GCMSBackup logbias latency default raidpool/GCMSBackup dedup off default raidpool/GCMSBackup mlslabel none default raidpool/GCMSBackup sync standard default raidpool/GCMSBackup nms:dedup-dirty off inherited from raidpool NAME PROPERTY VALUE SOURCE tank/GCMSBackup type filesystem - tank/GCMSBackup creation Tue Dec 6 16:19 2011 - tank/GCMSBackup used 128G - tank/GCMSBackup available 1.95T - tank/GCMSBackup referenced 128G - tank/GCMSBackup compressratio 1.92x - tank/GCMSBackup mounted yes - tank/GCMSBackup quota none default tank/GCMSBackup reservation none default tank/GCMSBackup recordsize 128K default tank/GCMSBackup mountpoint /volumes/tank/GCMSBackup inherited from tank tank/GCMSBackup sharenfs off default tank/GCMSBackup checksum on default tank/GCMSBackup compression on local tank/GCMSBackup atime on default tank/GCMSBackup devices on default tank/GCMSBackup exec on default tank/GCMSBackup setuid on default tank/GCMSBackup readonly off default tank/GCMSBackup zoned off default tank/GCMSBackup snapdir hidden default tank/GCMSBackup aclmode discard default tank/GCMSBackup aclinherit restricted default tank/GCMSBackup canmount on default tank/GCMSBackup xattr on default tank/GCMSBackup copies 1 default tank/GCMSBackup version 5 - tank/GCMSBackup utf8only off - tank/GCMSBackup normalization none - tank/GCMSBackup casesensitivity insensitive - tank/GCMSBackup vscan off default tank/GCMSBackup nbmand off default tank/GCMSBackup sharesmb name=GCMSBackup local tank/GCMSBackup refquota none default tank/GCMSBackup refreservation none default tank/GCMSBackup primarycache all default tank/GCMSBackup secondarycache all default tank/GCMSBackup usedbysnapshots 0 - tank/GCMSBackup usedbydataset 128G - tank/GCMSBackup usedbychildren 0 - tank/GCMSBackup usedbyrefreservation 0 - tank/GCMSBackup logbias latency default tank/GCMSBackup dedup off default tank/GCMSBackup mlslabel none default tank/GCMSBackup sync standard default
NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT raidpool 1.63T 913G 755G 54% 1.00x ONLINE - syspool 136G 19.3G 117G 14% 1.00x ONLINE - tank 3.25T 282G 2.97T 8% 1.00x ONLINE -