ZFS pool upgrade on production filer? Do I need maintenance window?

[electricd7]

Hello,

I recently updated a FreeNAS box from 8.0.4 to 8.3.x. Everything is working fine. The filer is hosting some VMs via NFS mounts. I still need to issue the zfs pool upgrade to get it to version 28. Do I need to do this via a maintenance window (ie, shut down the VMs which are using NFS mounts to the pool), or can it be done live? Thanks in advance.

ED7

 

[James]

There is no need to shutdown the VMs as this can be done live.

 

[electricd7]

Thanks

 

[ixdwhite]

'zpool upgrade' will suspend I/O for a short period while the conversion happens, but should be nearly instantaneous on a quiet pool. You should wait for a quiet time, or quiesce clients beforehand, as to reduce the impact of the delay.

As always with any maintenance activity, ensuring relevant backups are current before starting is a good idea. It never hurts to be prepared. :)

 

[electricd7]

Thanks. I was able to upgrade the pool successfully without turning off the VMs this morning.