Zfs Notes

Simple commands

zfs list

zpool list

zfs get all <thing>

like

get all /mnt/tank/dataset_music

Compression

I'm pretty sure this has to do with high compression ratios set on the the zimbra backups volumes. I've lowered it before and it's gotten better, so I will lower it to gzip-3 form gzip-6. Let's see how this looks over the next week.

[root@sms-thumper /]# date ; zpool list tank ; zfs list -o name,type,volsize,quota,refer,avail,compressratio,usedbysnapshots,mountpoint -S refer
Mon May 13 10:46:39 EDT 2013
NAME   SIZE   USED  AVAIL    CAP  HEALTH  ALTROOT
tank  19.0T  15.4T  3.66T    80%  ONLINE  -
NAME                       TYPE        VOLSIZE  QUOTA  REFER  AVAIL  RATIO  USEDSNAP  MOUNTPOINT
tank/zimbra-msgstr-XX      filesystem        -     5T  3.61T  1.39T  1.38x         0  /tank/nfs/zimbra-msgstr-XX
rootpool                   filesystem        -   none    34K   385G  1.00x         0  /rootpool
rootpool/ROOT              filesystem        -   none    19K   385G  1.00x         0  /rootpool/ROOT
rootpool/export            filesystem        -   none    19K   385G  1.00x         0  /rootpool/export
[root@sms-thumper /]# zfs get compression tank/zimbra-msgstr-XX
NAME                   PROPERTY     VALUE     SOURCE
tank/zimbra-msgstr-XX  compression  gzip      local
[root@sms-thumper /]# zfs set compression=gzip-3 tank/zimbra-msgstr-XX
[root@sms-thumper /]# zfs get compression tank/zimbra-msgstr-XX
NAME                   PROPERTY     VALUE     SOURCE
tank/zimbra-msgstr-XX  compression  gzip-3    local
[root@sms-thumper /]#

zfs send

on freenas: http://doc.freenas.org/index.php/Replication_Tasks