Lustre discuss - Feb 2013 - Upgrade from 1.8.4-oracle to 1.8.8-whamcloud question

We are still running 1.8.4 back when Lustre was still hosted by Oracle, and
its been mostly stable except for a few bugs here and there that I see have
been fixed in the last 1.8.8 release from whamcloud. I''m wondering, can
I
update the server side with the whamcloud''s rpms without updating the
client side right away(thus requiring a full shut down).
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In General, running mixed version client / server is NOT recommended. 
I''ve personally run into problems with 1.8.4 clients running against 
newer 1.8.8 servers. These problems are NOT server related but client 
related and due cause some issues. However, if your clients are stable 
now, likely you''re not going to run into it.

Unfortunately without testing you''ll never know what the end result 
might be. I recommend you upgrade across the board as client upgrade 
should not require a reboot. You can also follow the wiki.lustre.org 
procedure on rolling updates which may also help you avoid downtime.

-cf

On 02/19/2013 02:23 PM, David Noriega wrote:
> We are still running 1.8.4 back when Lustre was still hosted by 
> Oracle, and its been mostly stable except for a few bugs here and 
> there that I see have been fixed in the last 1.8.8 release from 
> whamcloud. I''m wondering, can I update the server side with the 
> whamcloud''s rpms without updating the client side right away(thus 
> requiring a full shut down).
>
>
>
> _______________________________________________
> Lustre-discuss mailing list
> Lustre-discuss at lists.lustre.org
> http://lists.lustre.org/mailman/listinfo/lustre-discuss

In my experience, even 1.8.6 client did not work with 1.8.7 servers
correctly. (file names appear corrupted.)
If you are going to upgrade servers, the servers have downtime. you can
upgrade clients meanwhile.

2013/2/20 Colin Faber <colin_faber at xyratex.com>
> In General, running mixed version client / server is NOT recommended.
> I''ve personally run into problems with 1.8.4 clients running
against
> newer 1.8.8 servers. These problems are NOT server related but client
> related and due cause some issues. However, if your clients are stable
> now, likely you''re not going to run into it.
>
> Unfortunately without testing you''ll never know what the end
result
> might be. I recommend you upgrade across the board as client upgrade
> should not require a reboot. You can also follow the wiki.lustre.org
> procedure on rolling updates which may also help you avoid downtime.
>
> -cf
>
> On 02/19/2013 02:23 PM, David Noriega wrote:
> > We are still running 1.8.4 back when Lustre was still hosted by
> > Oracle, and its been mostly stable except for a few bugs here and
> > there that I see have been fixed in the last 1.8.8 release from
> > whamcloud. I''m wondering, can I update the server side with
the
> > whamcloud''s rpms without updating the client side right
away(thus
> > requiring a full shut down).
> >
> >
> >
> > _______________________________________________
> > Lustre-discuss mailing list
> > Lustre-discuss at lists.lustre.org
> > http://lists.lustre.org/mailman/listinfo/lustre-discuss
>
> _______________________________________________
> Lustre-discuss mailing list
> Lustre-discuss at lists.lustre.org
> http://lists.lustre.org/mailman/listinfo/lustre-discuss
>


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Jongwoo Han
Techical consulting/Architect
jw.han at apexcns.com
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Mobile:+82-505-227-6108
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