zpool version needs to be upgrade whenever you are performing the OS patching .Because the newer version of zpool offers the more functionality and fixes a lot bugs. zpool upgrade can be performed on the fly without any impact to the data pools and rpool. But you need to consider lot of things prior the zpool upgrade. Because once you have upgrade the zpool, you can’t downgrade it . You may need to use the lower version of zpool ,if you need to migrate those pools to lower patch level system. The higher version of the zpool can’t be used on the lower patch level systems. So think before upgrading it .
Here we will see how we can upgrade the data pool and rpool .
1.To see the maximum level of zpool version supported on the system,use zpool version upgrade command.
root@UAAIS:~# zpool upgrade -v This system is currently running ZFS pool version 34. 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 11 Improved scrub performance 12 Snapshot properties 13 snapused property 14 passthrough-x aclinherit 15 user/group space accounting 16 stmf property support 17 Triple-parity RAID-Z 18 Snapshot user holds 19 Log device removal 20 Compression using zle (zero-length encoding) 21 Deduplication 22 Received properties 23 Slim ZIL 24 System attributes 25 Improved scrub stats 26 Improved snapshot deletion performance 27 Improved snapshot creation performance 28 Multiple vdev replacements 29 RAID-Z/mirror hybrid allocator 30 Encryption 31 Improved 'zfs list' performance 32 One MB blocksize 33 Improved share support 34 Sharing with inheritance For more information on a particular version, including supported releases, see the ZFS Administration Guide. root@UAAIS:~#
2.To check the current zpool version of specific zpool,
root@UAAIS:~# zpool get version oraz2
NAME PROPERTY VALUE SOURCE
oraz2 version 27 local
root@UAAIS:~# zpool status oraz2
pool: oraz2
state: ONLINE
status: The pool is formatted using an older on-disk format. The pool can
still be used, but some features are unavailable.
action: Upgrade the pool using 'zpool upgrade'. Once this is done, the
pool will no longer be accessible on older software versions.
scan: none requested
config:
NAME STATE READ WRITE CKSUM
oraz2 ONLINE 0 0 0
c8t6d0 ONLINE 0 0 0
errors: No known data errors
root@UAAIS:~#
3.To upgrade the zpool to specific version ,use the below command.Here the existing zpool versionof oraz2 is 27 and it has been upgraded to 30.The maximum supported version of zpool is 34.
root@UAAIS:~# zpool upgrade -V 30 oraz2 This system is currently running ZFS pool version 34. Successfully upgraded 'oraz2' from version 27 to version 30 root@UAAIS:~# zpool get version oraz2 NAME PROPERTY VALUE SOURCE oraz2 version 30 local root@UAAIS:~#
4.To update the zpool version to maximum version, use zpool upgrade command.
root@UAAIS:~# zpool upgrade oraz2 This system is currently running ZFS pool version 34. Successfully upgraded 'oraz2' from version 30 to version 34 root@UAAIS:~# zpool get version oraz2 NAME PROPERTY VALUE SOURCE oraz2 version 34 default root@UAAIS:~#
5.Once you have upgraded ,then there is no way to downgrade it .Read the below messages carefully.
root@UAAIS:~# zpool upgrade This system is currently running ZFS pool version 34. The following pools are out of date, and can be upgraded. After being upgraded, these pools will no longer be accessible by older software versions. VER POOL --- ------------ 27 oraz2 Use 'zpool upgrade -v' for a list of available versions and their associated features. root@UAAIS:~#
But you can re-create the zpool with lower zpool version using the below command.
root@UAAIS:~# zpool create -o version=27 oraz2 c8t6d0
root@UAAIS:~# zpool get version oraz2
NAME PROPERTY VALUE SOURCE
oraz2 version 27 local
root@UAAIS:~# zpool status oraz2
pool: oraz2
state: ONLINE
status: The pool is formatted using an older on-disk format. The pool can
still be used, but some features are unavailable.
action: Upgrade the pool using 'zpool upgrade'. Once this is done, the
pool will no longer be accessible on older software versions.
scan: none requested
config:
NAME STATE READ WRITE CKSUM
oraz2 ONLINE 0 0 0
c8t6d0 ONLINE 0 0 0
errors: No known data errors
root@UAAIS:~#
6.If you are planning to upgrade the rpool,please make sure you are running the “installgrub” on the rpool disk (X86).Otherwise system may not boot .Then you may need to boot with latest solaris DVD and run the “installgrub” to fix the booting issue.
root@UAAIS:~# zpool upgrade rpool This system is currently running ZFS pool version 34. Pool 'rpool' is already formatted using the current version. root@UAAIS:~#installgrub /boot/grub/stage1 /boot/grub/stage2 /dev/dsk/c0t0d0s0
Note:For solaris 11, you no need to run “installgrub” command.
7.If the zpool is mirrored , make sure that you are running the “installgrub” for both the disks.
8.zpool upgrade just upgrades the zpools version and it won’t upgrade the zfs dataset versions.Here is the command to see the maximum zfs version supported on this machine.
root@UAAIS:~# zfs upgrade -v The following filesystem versions are supported: VER DESCRIPTION --- -------------------------------------------------------- 1 Initial ZFS filesystem version 2 Enhanced directory entries 3 Case insensitive and SMB credentials support 4 userquota, groupquota properties 5 System attributes 6 Multilevel file system support For more information on a particular version, including supported releases, see the ZFS Administration Guide. root@UAAIS:~#
9.Like zpool, you can also upgrade the zfs to specific version.
root@UAAIS:~# zfs upgrade -V 5 oraz1/oracle4 1 filesystems upgraded root@UAAIS:~# zfs get version oraz1/oracle4 NAME PROPERTY VALUE SOURCE oraz1/oracle4 version 5 - root@UAAIS:~#
10.You can upgrade the zfs to maximum versions that supported by this system.
root@UAAIS:~# zfs get version oraz1/oracle4 NAME PROPERTY VALUE SOURCE oraz1/oracle4 version 5 - root@UAAIS:~# zfs upgrade oraz1/oracle4 1 filesystems upgraded root@UAAIS:~# zfs get version oraz1/oracle4 NAME PROPERTY VALUE SOURCE oraz1/oracle4 version 6 - root@UAAIS:~#
11.You have option also to create the lower version of zfs dataset .
root@UAAIS:~# zfs create -o version=4 oraz1/oracle4 root@UAAIS:~# zfs get version oraz1/oracle4 NAME PROPERTY VALUE SOURCE oraz1/oracle4 version 4 - root@UAAIS:~#
12.To upgrade the all zpool and zfs to maximum software version.
root@UAAIS:~# zpool upgrade -a This system is currently running ZFS pool version 34. Successfully upgraded 'oraz2' root@UAAIS:~# root@UAAIS:~# zfs upgrade -r oraz2 0 filesystems upgraded 1 filesystems already at this version root@UAAIS:~#
The above commands upgraded the all the zpools to the newer version and upgraded the all dataset to higher version on zpool oraz2.
Hope this article will help you to upgrade the zpools on your environemnt.
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