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ZFS - zpool administration Create 7 files using mkfile command to perform all zpool related activities. [root@geekyfacts]# mkdir /pool
[root@geekyfacts]# cd /pool
[root@geekyfacts]# ls
[root@geekyfacts]# mkfile 100m disk1 disk2 disk3 disk4 disk5 disk6
[root@geekyfacts]# mkfile 50m disk7
[root@geekyfacts]# ls -l
total 1332048
-rw------T 1 root root 104857600 Dec 22 23:59 disk1
-rw------T 1 root root 104857600 Dec 22 23:59 disk2
-rw------T 1 root root 104857600 Dec 22 23:59 disk3
-rw------T 1 root root 104857600 Dec 22 23:59 disk4
-rw------T 1 root root 104857600 Dec 22 23:59 disk5
-rw------T 1 root root 104857600 Dec 22 23:59 disk6
-rw------T 1 root root 52428800 Dec 23 00:00 disk7
[root@geekyfacts]#
zpool create zpool create - dry run without creating the pool [root@geekyfacts]# zpool create -n testpool /pool/disk1 /pool/disk2
would create 'testpool' with the following layout: testpool
/pool/disk1
/pool/disk2
[root@geekyfacts]#
zpool create with two disks in the pool [root@geekyfacts]# zpool create testpool /pool/disk1 /pool/disk2
[root@geekyfacts]# zpool status
pool: testpool
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
testpool ONLINE 0 0 0
/pool/disk1 ONLINE 0 0 0
/pool/disk2 ONLINE 0 0 0 errors: No known data errors
[root@geekyfacts]#
[root@geekyfacts]# zpool destroy testpool
zpool create with pool properties configured during creation
[root@geekyfacts]# zpool create -o autoreplace=on testpool /pool/disk1 /pool/disk2
[root@geekyfacts]# zpool get autoreplace testpool
NAME PROPERTY VALUE SOURCE
testpool autoreplace on local
[root@geekyfacts]#
[root@geekyfacts]# zpool destroy testpool
zpool create with custom mount point configuration
[root@geekyfacts]# zpool create -m /poolmnt testpool /pool/disk1 /pool/disk2
[root@geekyfacts]# zpool list
NAME SIZE USED AVAIL CAP HEALTH ALTROOT
testpool 191M 103K 191M 0% ONLINE -
[root@geekyfacts]# df /poolmnt
/poolmnt (testpool ): 325435 blocks 325435 files
[root@geekyfacts]#
[root@geekyfacts]# zpool destroy testpool
zpool create with mirror configuration [root@geekyfacts]# zpool create testpool mirror /pool/disk1 /pool/disk2
[root@geekyfacts]# zpool status
pool: testpool
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
testpool ONLINE 0 0 0
mirror ONLINE 0 0 0
/pool/disk1 ONLINE 0 0 0
/pool/disk2 ONLINE 0 0 0 errors: No known data errors
[root@geekyfacts]#
[root@geekyfacts]# zpool destroy testpool
zpool create with mirror + striping configuration
[root@geekyfacts]# zpool create testpool mirror /pool/disk1 /pool/disk2 mirror /pool/disk3 /pool/disk4
[root@geekyfacts]# zpool status
pool: testpool
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
testpool ONLINE 0 0 0
mirror ONLINE 0 0 0
/pool/disk1 ONLINE 0 0 0
/pool/disk2 ONLINE 0 0 0
mirror ONLINE 0 0 0
/pool/disk3 ONLINE 0 0 0
/pool/disk4 ONLINE 0 0 0 errors: No known data errors
[root@geekyfacts]#
[root@geekyfacts]# zpool destroy testpool
zpool create with raidz1 configuration
[root@geekyfacts]# zpool create testpool raidz /pool/disk1 /pool/disk2 /pool/disk3
[root@geekyfacts]# zpool status
pool: testpool
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
testpool ONLINE 0 0 0
raidz1 ONLINE 0 0 0
/pool/disk1 ONLINE 0 0 0
/pool/disk2 ONLINE 0 0 0
/pool/disk3 ONLINE 0 0 0 errors: No known data errors
[root@geekyfacts]# zpool destroy testpool
zpool create with raidz + striping configuration
[root@geekyfacts]# zpool create testpool raidz /pool/disk1 /pool/disk2 /pool/disk3 raidz /pool/disk4 /pool/disk5 /pool/disk6
[root@geekyfacts]# zpool status
pool: testpool
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
testpool ONLINE 0 0 0
raidz1 ONLINE 0 0 0
/pool/disk1 ONLINE 0 0 0
/pool/disk2 ONLINE 0 0 0
/pool/disk3 ONLINE 0 0 0
raidz1 ONLINE 0 0 0
/pool/disk4 ONLINE 0 0 0
/pool/disk5 ONLINE 0 0 0
/pool/disk6 ONLINE 0 0 0 errors: No known data errors
[root@geekyfacts]# zpool destroy testpool
[root@geekyfacts]#
zpool create with raidz2 configuration
[root@geekyfacts]# zpool create testpool raidz2 /pool/disk1 /pool/disk2 /pool/disk3
[root@geekyfacts]# zpool status
pool: testpool
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
testpool ONLINE 0 0 0
raidz2 ONLINE 0 0 0
/pool/disk1 ONLINE 0 0 0
/pool/disk2 ONLINE 0 0 0
/pool/disk3 ONLINE 0 0 0 [root@geekyfacts]# zpool destroy testpool
zpool create with hot spare disks [root@geekyfacts]# zpool create testpool /pool/disk1 /pool/disk2 spare /pool/disk3
[root@geekyfacts]# zpool status
pool: testpool
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
testpool ONLINE 0 0 0
/pool/disk1 ONLINE 0 0 0
/pool/disk2 ONLINE 0 0 0
spares
/pool/disk3 AVAIL errors: No known data errors
[root@geekyfacts]# zpool destroy testpool
zpool create with mismatched replication levels( not recommended , use -f to force the creation)
[root@geekyfacts]# zpool create testpool mirror /pool/disk1 /pool/disk2 raidz /pool/disk4 /pool/disk5 /pool/disk6
invalid vdev specification
use '-f' to override the following errors:
mismatched replication level: both mirror and raidz vdevs are present
[root@geekyfacts]#
zpool create with mirroring disks of different sizes( not recommended, use -f to force the creation)
[root@geekyfacts]# zpool create testpool mirror /pool/disk1 /pool/disk7
invalid vdev specification
use '-f' to override the following errors:
mirror contains devices of different sizes
[root@geekyfacts]#
zpool add [root@geekyfacts]# zpool create testpool /pool/disk1 /pool/disk2
[root@geekyfacts]# zpool status
pool: testpool
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
testpool ONLINE 0 0 0
/pool/disk1 ONLINE 0 0 0
/pool/disk2 ONLINE 0 0 0 errors: No known data errors
[root@geekyfacts]# zpool add testpool /pool/disk3
[root@geekyfacts]# zpool status
pool: testpool
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
testpool ONLINE 0 0 0
/pool/disk1 ONLINE 0 0 0
/pool/disk2 ONLINE 0 0 0
/pool/disk3 ONLINE 0 0 0 errors: No known data errors
[root@geekyfacts]#
zpool remove
zpool remove can be used only to remove the hot spare devices.
[root@geekyfacts]# zpool create testpool /pool/disk1 /pool/disk2 spare /pool/disk3
[root@geekyfacts]# zpool status
pool: testpool
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
testpool ONLINE 0 0 0
/pool/disk1 ONLINE 0 0 0
/pool/disk2 ONLINE 0 0 0
spares
/pool/disk3 AVAIL errors: No known data errors
[root@geekyfacts]# zpool remove testpool /pool/disk3
[root@geekyfacts]# zpool status
pool: testpool
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
testpool ONLINE 0 0 0
/pool/disk1 ONLINE 0 0 0
/pool/disk2 ONLINE 0 0 0 errors: No known data errors
[root@geekyfacts]#
zpool list [root@geekyfacts]# zpool create testpool /pool/disk1 /pool/disk2 /pool/disk3
[root@geekyfacts]# zpool status
pool: testpool
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
testpool ONLINE 0 0 0
/pool/disk1 ONLINE 0 0 0
/pool/disk2 ONLINE 0 0 0
/pool/disk3 ONLINE 0 0 0 errors: No known data errors
[root@geekyfacts]# zpool list
NAME SIZE USED AVAIL CAP HEALTH ALTROOT
testpool 286M 97K 286M 0% ONLINE -
[root@geekyfacts]#
List zpool details in script mode
[root@geekyfacts]# zpool list -H
testpool 286M 97K 286M 0% ONLINE - [root@geekyfacts]#
List only specified zpool parameters [root@geekyfacts]# zpool list -o size,health
SIZE HEALTH
286M ONLINE
[root@geekyfacts]#
zpool destroy
[root@geekyfacts]# zpool create testpool /pool/disk1 /pool/disk2
[root@geekyfacts]# zpool destroy testpool
zpool iostat [root@geekyfacts]# zpool iostat
capacity operations bandwidth
pool used avail read write read write
---------- ----- ----- ----- ----- ----- -----
testpool 114K 286M 0 1 1.84K 26.3K
[root@geekyfacts]# List iostat of each disks involved in the pool
[root@geekyfacts]# zpool iostat -v
capacity operations bandwidth
pool used avail read write read write
------------- ----- ----- ----- ----- ----- -----
testpool 114K 286M 0 0 815 11.3K
/pool/disk1 41K 95.5M 0 0 272 3.79K
/pool/disk2 32K 95.5M 0 0 271 3.76K
/pool/disk3 41K 95.5M 0 0 272 3.79K
------------- ----- ----- ----- ----- ----- -----
[root@geekyfacts]#
List iostat of pool in specific intervals [root@geekyfacts]# zpool iostat 1 5
capacity operations bandwidth
pool used avail read write read write
---------- ----- ----- ----- ----- ----- -----
testpool 114K 286M 0 0 867 12.1K
testpool 114K 286M 0 0 0 0
testpool 114K 286M 0 0 0 0
testpool 114K 286M 0 0 0 0
testpool 114K 286M 0 0 0 0
[root@geekyfacts]#
zpool status
[root@geekyfacts]# zpool status
pool: testpool
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
testpool ONLINE 0 0 0
/pool/disk1 ONLINE 0 0 0
/pool/disk2 ONLINE 0 0 0
/pool/disk3 ONLINE 0 0 0 errors: No known data errors [root@geekyfacts]#
Display status of pool which is not healthy [root@geekyfacts]# zpool status -x
all pools are healthy
[root@geekyfacts]#
zpool offline
[root@geekyfacts]# zpool create testpool mirror /pool/disk1 /pool/disk2 /pool/disk3
[root@geekyfacts]# zpool status
pool: testpool
state: ONLINE
scrub: none requested
config: NAME STATE READ WRITE CKSUM
testpool ONLINE 0 0 0
mirror ONLINE 0 0 0
/pool/disk1 ONLINE 0 0 0
/pool/disk2 ONLINE 0 0 0
/pool/disk3 ONLINE 0 0 0 errors: No known data errors
[root@geekyfacts]# zpool offline testpool /pool/disk3
[root@geekyfacts]# zpool status
pool: testpool
state: DEGRADED
status: One or more devices has been taken offline by the administrator.
Sufficient replicas exist for the pool to continue functioning in a
degraded state.
action: Online the device using 'zpool online' or replace the device with
'zpool replace'.
scrub: none requested
config: NAME STATE READ WRITE CKSUM
testpool DEGRADED 0 0 0
mirror DEGRADED 0 0 0
/pool/disk1 ONLINE 0 0 0
/pool/disk2 ONLINE 0 0 0
/pool/disk3 OFFLINE 0 0 0 errors: No known data errors
[root@geekyfacts]# Make disks offline temporarily
[root@geekyfacts]# zpool offline -t testpool /pool/disk3
zpool online
[root@geekyfacts]# zpool online testpool /pool/disk3
[root@geekyfacts]# zpool status
pool: testpool
state: ONLINE
scrub: resilver completed after 0h0m with 0 errors on Tue Dec 23 00:42:39 2008
config:
NAME STATE READ WRITE CKSUM
testpool ONLINE 0 0 0
mirror ONLINE 0 0 0
/pool/disk1 ONLINE 0 0 0
/pool/disk2 ONLINE 0 0 0
/pool/disk3 ONLINE 0 0 0 errors: No known data errors
[root@geekyfacts]#
zpool clear It clears the device errors in the pool [root@geekyfacts]# zpool clear testpool
zpool attach
[root@geekyfacts]# zpool create testpool mirror /pool/disk1 /pool/disk2 /pool/disk3
[root@geekyfacts]# zpool status
pool: testpool
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
testpool ONLINE 0 0 0
mirror ONLINE 0 0 0
/pool/disk1 ONLINE 0 0 0
/pool/disk2 ONLINE 0 0 0
/pool/disk3 ONLINE 0 0 0 errors: No known data errors
[root@geekyfacts]# zpool attach testpool /pool/disk3 /pool/disk4
[root@geekyfacts]# zpool status
pool: testpool
state: ONLINE
scrub: resilver completed after 0h0m with 0 errors on Tue Dec 23 00:46:48 2008
config:
NAME STATE READ WRITE CKSUM
testpool ONLINE 0 0 0
mirror ONLINE 0 0 0
/pool/disk1 ONLINE 0 0 0
/pool/disk2 ONLINE 0 0 0
/pool/disk3 ONLINE 0 0 0
/pool/disk4 ONLINE 0 0 0 errors: No known data errors
[root@geekyfacts]#
zpool detach [root@geekyfacts]# zpool status
pool: testpool
state: ONLINE
scrub: resilver completed after 0h0m with 0 errors on Tue Dec 23 00:46:48 2008
config: NAME STATE READ WRITE CKSUM
testpool ONLINE 0 0 0
mirror ONLINE 0 0 0
/pool/disk1 ONLINE 0 0 0
/pool/disk2 ONLINE 0 0 0
/pool/disk3 ONLINE 0 0 0
/pool/disk4 ONLINE 0 0 0 errors: No known data errors
[root@geekyfacts]# zpool detach testpool /pool/disk4
[root@geekyfacts]# zpool status
pool: testpool
state: ONLINE
scrub: resilver completed after 0h0m with 0 errors on Tue Dec 23 00:46:48 2008
config:
NAME STATE READ WRITE CKSUM
testpool ONLINE 0 0 0
mirror ONLINE 0 0 0
/pool/disk1 ONLINE 0 0 0
/pool/disk2 ONLINE 0 0 0
/pool/disk3 ONLINE 0 0 0 errors: No known data errors
[root@geekyfacts]#
zpool replace [root@geekyfacts]# zpool status
pool: testpool
state: ONLINE
scrub: resilver completed after 0h0m with 0 errors on Tue Dec 23 00:46:48 2008
config: NAME STATE READ WRITE CKSUM
testpool ONLINE 0 0 0
mirror ONLINE 0 0 0
/pool/disk1 ONLINE 0 0 0
/pool/disk2 ONLINE 0 0 0
/pool/disk3 ONLINE 0 0 0 errors: No known data errors
[root@geekyfacts]# zpool replace testpool /pool/disk3 /pool/disk4
[root@geekyfacts]# zpool status
pool: testpool
state: ONLINE
scrub: resilver completed after 0h0m with 0 errors on Tue Dec 23 00:49:38 2008
config:
NAME STATE READ WRITE CKSUM
testpool ONLINE 0 0 0
mirror ONLINE 0 0 0
/pool/disk1 ONLINE 0 0 0
/pool/disk2 ONLINE 0 0 0
replacing ONLINE 0 0 0
/pool/disk3 ONLINE 0 0 0
/pool/disk4 ONLINE 0 0 0 errors: No known data errors
[root@geekyfacts]# zpool status
pool: testpool
state: ONLINE
scrub: resilver completed after 0h0m with 0 errors on Tue Dec 23 00:49:38 2008
config:
NAME STATE READ WRITE CKSUM
testpool ONLINE 0 0 0
mirror ONLINE 0 0 0
/pool/disk1 ONLINE 0 0 0
/pool/disk2 ONLINE 0 0 0
/pool/disk4 ONLINE 0 0 0 errors: No known data errors
[root@geekyfacts]#
zpool scrub
[root@geekyfacts]# zpool scrub testpool
[root@geekyfacts]# zpool status
pool: testpool
state: ONLINE
scrub: scrub completed after 0h0m with 0 errors on Tue Dec 23 00:50:57 2008
config:
NAME STATE READ WRITE CKSUM
testpool ONLINE 0 0 0
mirror ONLINE 0 0 0
/pool/disk1 ONLINE 0 0 0
/pool/disk2 ONLINE 0 0 0
/pool/disk4 ONLINE 0 0 0
[root@geekyfacts]# Stop the running scrub operation [root@geekyfacts]# zpool scrub -s testpool
zpool export
[root@geekyfacts]# zpool export testpool
[root@geekyfacts]# zpool status
no pools available
[root@geekyfacts]#
zpool import Displays the list of pools which can be imported
[root@geekyfacts]# zpool import -d /pool
pool: testpool
id: 3250275846513037638
state: ONLINE
action: The pool can be imported using its name or numeric identifier.
config:
testpool ONLINE
mirror ONLINE
/pool/disk1 ONLINE
/pool/disk2 ONLINE
/pool/disk4 ONLINE
[root@geekyfacts]# Import pool based on the ID
[root@geekyfacts]# zpool import -d /pool 3250275846513037638
[root@geekyfacts]# zpool status
pool: testpool
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
testpool ONLINE 0 0 0
mirror ONLINE 0 0 0
/pool/disk1 ONLINE 0 0 0
/pool/disk2 ONLINE 0 0 0
/pool/disk4 ONLINE 0 0 0 errors: No known data errors
[root@geekyfacts]# Display the list of pools destryed [root@geekyfacts]# zpool import -D -d /pool
pool: testpool
id: 3250275846513037638
state: ONLINE (DESTROYED)
action: The pool can be imported using its name or numeric identifier.
config: testpool ONLINE
mirror ONLINE
/pool/disk1 ONLINE
/pool/disk2 ONLINE
/pool/disk4 ONLINE
[root@geekyfacts]#
Import destroyed pool based on the ID [root@geekyfacts]# zpool import -D -d /pool 3250275846513037638
[root@geekyfacts]# zpool status
pool: testpool
state: ONLINE
scrub: none requested
config:
NAME STATE READ WRITE CKSUM
testpool ONLINE 0 0 0
mirror ONLINE 0 0 0
/pool/disk1 ONLINE 0 0 0
/pool/disk2 ONLINE 0 0 0
/pool/disk4 ONLINE 0 0 0 errors: No known data errors
[root@geekyfacts]#
zpool upgrade Display the pool formatted version
[root@geekyfacts]# zpool upgrade
This system is currently running ZFS pool version 10.
All pools are formatted using this version. [root@geekyfacts]#
Display the supported pool version [root@geekyfacts]# zpool upgrade -v
This system is currently running ZFS pool version 10. The following versions are supported: VER DESCRIPTION
--- --------------------------------------------------------
1 Initial ZFS version
2 Ditto blocks (replicated metadata)
3 Hot spares and double parity RAID-Z
4 zpool history
5 Compression using the gzip algorithm
6 bootfs pool property
7 Separate intent log devices
8 Delegated administration
9 refquota and refreservation properties
10 Cache devices
For more information on a particular version, including supported releases, see: http://www.opensolaris.org/os/community/zfs/version/N Where 'N' is the version number.
[root@geekyfacts]#
zpool get Display all parameter values set for the pool
[root@geekyfacts]# zpool get all testpool
NAME PROPERTY VALUE SOURCE
testpool size 95.5M -
testpool used 114K -
testpool available 95.4M -
testpool capacity 0% -
testpool altroot - default
testpool health ONLINE -
testpool guid 3250275846513037638 -
testpool version 10 default
testpool bootfs - default
testpool delegation on default
testpool autoreplace off default
testpool cachefile - default
testpool failmode wait default
[root@geekyfacts]# zpool get delegation testpool
NAME PROPERTY VALUE SOURCE
testpool delegation on default
[root@geekyfacts]#
zfs set
[root@geekyfacts]# zpool set autoreplace=on testpool
[root@geekyfacts]# zpool get autoreplace testpool
NAME PROPERTY VALUE SOURCE
testpool autoreplace on local
[root@geekyfacts]#
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