[Lustre-discuss] question about failnode with mixed networks
John White
jwhite at lbl.gov
Tue Nov 24 13:19:51 PST 2009
Excellent, thanks for the replies. One more question:
Is there a --failnode corollary for MGTs...? Does lustre support MGT/S failover?
On Nov 16, 2009, at 6:51 AM, Brian J. Murrell wrote:
> 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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----------------
John White
High Performance Computing Services (HPCS)
(510) 486-7307
One Cyclotron Rd, MS: 50B-3209C
Lawrence Berkeley National Lab
Berkeley, CA 94720
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