TrueNAS

【TrueNAS】ZFS 管理

Posted by 西维蜀黍 on 2021-05-13, Last Modified on 2021-10-17

列出当前所有所有的 Pool

$ zpool list
NAME        SIZE  ALLOC   FREE  CKPOINT  EXPANDSZ   FRAG    CAP  DEDUP    HEALTH  ALTROOT
SWPool     16.4T  2.35T  14.0T        -         -     0%    14%  1.00x    ONLINE  /mnt
SWPoolSSD  1.86T   142G  1.72T        -         -     0%     7%  1.00x    ONLINE  /mnt
boot-pool   103G  1.18G   102G        -         -     0%     1%  1.00x    ONLINE  -

查看 Pool 的读写状态

# 每一秒更新一次所有 Pool 的读写状态
$ zpool iostat -n 1
              capacity     operations     bandwidth
pool        alloc   free   read  write   read  write
----------  -----  -----  -----  -----  -----  -----
SWPool      2.35T  14.0T     11     19  4.59M   296K
SWPoolSSD    142G  1.72T      6     13   722K   175K
boot-pool   1.18G   102G      0      1  2.64K   204K
----------  -----  -----  -----  -----  -----  -----

# 每一秒更新一次指定 Pool 的读写状态
$ zpool iostat SWPoolSSD -n 1
              capacity     operations     bandwidth
pool        alloc   free   read  write   read  write
----------  -----  -----  -----  -----  -----  -----
SWPoolSSD    142G  1.72T      6     13   738K   176K
SWPoolSSD    142G  1.72T      0      0      0      0

查看特定 Pool 健康状态

You can quickly review pool health status by using the zpool status command as follows:

$ zpool status -x
all pools are healthy

$ zpool status -v <pool name>
  pool: tank
 state: DEGRADED
status: One or more devices could not be opened.  Sufficient replicas exist for
        the pool to continue functioning in a degraded state.
action: Attach the missing device and online it using 'zpool online'.
   see: http://www.sun.com/msg/ZFS-8000-2Q
 scrub: scrub completed after 0h0m with 0 errors on Wed Jan 20 15:13:59 2010
config:

        NAME        STATE     READ WRITE CKSUM
        tank        DEGRADED     0     0     0
          mirror-0  DEGRADED     0     0     0
            c1t0d0  ONLINE       0     0     0
            c1t1d0  UNAVAIL      0     0     0  cannot open

errors: No known data errors

CRUD

Deleting a ZPool

Deleting a zpool and deleting all data within the zpool:

zpool destroy nameofzpool

Removing a Zpool

If you have a zpool on eg a usb drive, this command will allow you to safely remove it:

zpool export nameofzpool

If you want to import the zpool again:

zpool import nameofzpool

Running zpool import with no arguments will list all available zpools.

Creating a Zpool on a disk image

Though not recommended for normal use, it is possible to create a zpool on top of a file.

dd if=/dev/zero of=filename.img bs=1M count=1000
zpool create nameofzpool /absolute/path/to/filename.img

will create an image of 1GB. It is also possible to create a sparse image, to create an image that can hold 100GB:

dd if=/dev/zero of=filename.img bs=1k count=1 seek=100M

ZVol

Resize

$ zfs set volsize=new_size tank/name_of_the_zvol

Verify

$ zfs get volsize SSDPool2/VM/Ubuntu2
NAME                 PROPERTY  VALUE    SOURCE
SSDPool2/VM/Ubuntu2  volsize   200G     local

$ zfs list SSDPool2/VM/Ubuntu2
NAME                  USED  AVAIL     REFER  MOUNTPOINT
SSDPool2/VM/Ubuntu2  18.3G   774G     9.94G  -

Reference

FEATURED TAGS
algorithm algorithmproblem architecturalpattern architecture aws c# cachesystem codis compile concurrentcontrol database dataformat datastructure debug design designpattern distributedsystem django docker domain engineering freebsd git golang grafana hackintosh hadoop hardware hexo http hugo ios iot java javaee javascript kafka kubernetes linux linuxcommand linuxio lock macos markdown microservices mysql nas network networkprogramming nginx node.js npm oop openwrt operatingsystem padavan performance programming prometheus protobuf python redis router security shell software testing spring sql systemdesign truenas ubuntu vmware vpn windows wmware wordpress xml zookeeper
FRIENDS

TOC