[Lustre-discuss] mdt mgs ost's on same node?

[Cliff White]

Brock Palen wrote:
> On Nov 7, 2007, at 4:34 PM, Oleg Drokin wrote:
> 
>> Hello!
>>
>> On Nov 7, 2007, at 3:52 PM, Brock Palen wrote:
>>
>>> We would like to run a mdt and mgs on a node that will also have
>>> devices providing some ost's  is this a problem?  Does it run into
>>> the same problems as a client thats also a server has leaving us in
>>> unrecoverable state?
>> Yes, this has similar recovery implications at the moment - this  
>> configuration will not have recovery working, because mds that is a  
>> client of ost is not available for replay. But we plan to fix this  
>> eventually.
> 
> Whoops I guess I confused some people (or im confused now)  the  
> server would not be a clinet of the file system, but would be a mds  
> and oss at teh same time.  Is this a problem?  No repeat No OSS MDS  
> or MGS will mount the final filesystem.

No confusion. The MDS is actually a 'client' of the OSS, so you have the
same deadlock/recovery issue that exists with the filesystem mount client.
cliffw


> 
>> Bye,
>>     Oleg
>>
>>
> 
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