[Lustre-discuss] question about failnode with mixed networks

[Brian J. Murrell]

On Fri, 2009-11-13 at 14:34 -0800, John White wrote: 
> 
> In a failover situation, it would appear that tcp connected clients do not get the hint to switch over to the secondary MDS

Clients don't (yet) get "hints" to switch servers.  Clients continue to
use a server until they don't get a response, at which time they cycle
through their list of NIDs for the unresponsive service.

> When I initially set up the file system, I specified --failnode for the @o2ib interfaces,

Only the @o2ib interfaces?

> should I have also specified NIDs for the @tcp0 during the fs construction?

Yes.  You specify the NIDs for all servers that should be considered for
that service.

> If so, is it possible to add this as an afterthought?

You want tunefs.lustre.

b.

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