[Lustre-discuss] lustre interoperability

[Cliff White]

Jerome, Ron wrote:
> Thanks Andreas,
>  
> So I guess that means I can give it a try and hope for the best :-) or would I be wiser to go step by step given this is a production system serving 32 TB?
>  
> Ron.
> 
You should be able to jump from 1.6.0 to 1.6.3 without issues.
As Andreas said, we do not test more than one minor version, but there
are no changes in any protocol, configuration, or on-disk data.

We try very hard to make great big announcements/release notes when we 
_do make major changes.

cliffw

> ________________________________
> 
> From: lustre-discuss-bounces at clusterfs.com on behalf of Andreas Dilger
> Sent: Thu 10/18/2007 5:56 PM
> To: Jerome, Ron
> Cc: lustre-discuss at clusterfs.com
> Subject: Re: [Lustre-discuss] lustre interoperability
> 
> 
> 
> On Oct 18, 2007  10:49 -0400, Jerome, Ron wrote:
>> Could somebody (Andreas maybe :) give a definitive answer on this...
>>
>>>> Having said that, I believe 1.6.0 and 1.6.3 is actually something
>> that
>>>> will work, but I'm not 100% certain of this, so I'll allow others to
>>>> correct me.
>> ... as I would like to do just this, go from 1.6.0.1 to 1.6.3 and would
>> rather not have to go through the intermediate versions if I don't have
>> to.
> 
> I'm not aware of any incompatibilities between 1.6.0 and 1.6.3, and we
> have a good mechanism to handle protocol negotiation when we add features
> to Lustre (since 1.4.2).  That said, we can't possibly do an all-to-all
> test matrix, so we only test against the previous minor version (1.6.3
> against 1.6.2) and the upgrade from the most recent major version (1.4.12).
> 
> There have been no changes to the on-disk format since 1.4 days (excluding
> the config logs) that I'm aware of.
> 
> Cheers, Andreas
> --
> Andreas Dilger
> Principal Software Engineer
> Cluster File Systems, Inc.
> 
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