[Lustre-discuss] Upgrade from 1.8.6 to 2.1?

Andreas Dilger adilger at whamcloud.com
Sun Oct 23 23:05:04 PDT 2011

On 2011-10-23, at 10:55 PM, Brett Worth wrote:
> On 22/10/11 03:10, Prakash Surya wrote:
>> On Fri, Oct 21, 2011 at 08:58:39AM -0700, David Noriega wrote:
>>> Also could I have the servers move to 2.1 while still having the
>>> clients at 1.8.6?
>> AFAIK, yes this is possible.
> What about running 1.6.5 clients to connect to a 2.1 server?
> We have an old legacy system which has 1.6.5 which is currently connecting to a 1.8.6 
> server.  Will a 2.1 server still talk to something that old?

No that won't work.  1.8 clients have added code to handle the
protocol changes with 2.x servers.  There were a number of bug
fixes related to corner cases in protocol interoperability, so
it is recommended to use at least 1.8.5 clients, but 1.8.6 is

Cheers, Andreas
Andreas Dilger 
Principal Engineer
Whamcloud, Inc.

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