[Gluster-users] upgrade best practices

[Poornima Gurusiddaiah]

On Fri, Mar 29, 2019, 10:03 PM Jim Kinney <jim.kinney at gmail.com> wrote:

> Currently running 3.12 on Centos 7.6. Doing cleanups on split-brain and
> out of sync, need heal files.
>
> We need to migrate the three replica servers to gluster v. 5 or 6. Also
> will need to upgrade about 80 clients as well. Given that a complete
> removal of gluster will not touch the 200+TB of data on 12 volumes, we are
> looking at doing that process, Stop all clients, stop all glusterd
> services, remove all of it, install new version, setup new volumes from old
> bricks, install new clients, mount everything.
>
> We would like to get some better performance from nfs-ganesha mounts but
> that doesn't look like an option (not done any parameter tweaks in testing
> yet). At a bare minimum, we would like to minimize the total downtime of
> all systems.
>
> Does this process make more sense than a version upgrade process to 4.1,
> then 5, then 6? What "gotcha's" do I need to be ready for? I have until
> late May to prep and test on old, slow hardware with a small amount of
> files and volumes.
>

You can directly upgrade from 3.12 to 6.x. I would suggest that rather than
deleting and creating Gluster volume. +Hari and +Sanju for further
guidelines on upgrade, as they recently did upgrade tests. +Soumya to add
to the nfs-ganesha aspect.

Regards,
Poornima

> --
>
> James P. Kinney III Every time you stop a school, you will have to build a
> jail. What you gain at one end you lose at the other. It's like feeding a
> dog on his own tail. It won't fatten the dog. - Speech 11/23/1900 Mark
> Twain http://heretothereideas.blogspot.com/
>
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