Re: [Moosefs-users] How to move the chunk server to another machine

[Anh K. H. <ky...@vi...>]

On Wed, 20 Jul 2011 07:06:34 -0400
Vineet Jain <vin...@gm...> wrote:

> This works great if you have the extra disks. However, what if you
> want to:
> 
> - shutdown foobar
> - move the physical disks to another server
> - startup foobar on another server.
> 
> Is that possible?

The answer depends on your MFS setup: number of chunk servers, goals
of all files, number of disks and the size of disks,... Could you
please give more details about your MFS configuration?

*For example*, if all files have at least goal 2 (this means you have
at least two chunk servers) and all files are good (check in
MFS.cgi), you may shutdown the chunk server "foobar" as you've said.
You should move the disks and server as soon as possible. Please note
this isn't the safest method to move chunk server. Actually I used
this way for one of my MFS setups, but I don't recommend it :D

Please note, when moving a chunk server, all MFS configuration and
variant files (/var/lib/mfs/) should be moved to new server.

Hope this helps.

Regards,

> On Wed, Jul 20, 2011 at 3:25 AM, Anh K. Huynh <ky...@vi...>
> wrote:
> > On Tue, 19 Jul 2011 14:02:04 -0400
> > Vineet Jain <vin...@gm...> wrote:
> >
> >> I currently have the mds server and chunk server running on one
> >> server. At some point I will have to move the chunk server to
> >> another machine. How would I go about doing that? Can I shut down
> >> everything. And just move the hard drives to another machine and
> >> make sure each hard drive gets mounted to the exact same point
> >> and restart the services?
> >
> > >From my practice:
> >
> > (1) Set up new chunk server and make it available on your MFS
> > setup (2) On the chunk server (Foobar) that want to destroy, mark
> > your disks as "removal" and reload/restart process
> > (3) Wait for the complete status of replication
> > (4) Shutdown the chunk server (Foobar)
> >
> > Feel free to read details at
> >  http://www.moosefs.org/moosefs-faq.html#add_remove
> >  http://www.moosefs.org/moosefs-faq.html#mark_for_removal
> > ...

-- 
Anh Ky Huynh @ ICT
Registered Linux User #392115