[PVFS-users] mmargo

[Nathan Poznick]

Thus spake Ron W. Green:
> Martin,
> 
> We seem to get those "failed on enqueue" quite often.  Of course, our 
> cluster is much bigger too.  I've scratched my head on this, and looked 
> at the code.  The best I can tell it is when the pvfs client attempts a 
> metadata operation to the mgr node.  I suspect that the mgr is slow in 
> responding and/or has run out of queueing space to enqueue the metadata 
> operation request (create or stat).
> 
> Anyone on the list know if mgr has a fixed queue size?  Or can we jack 
> up the client timeouts?  Multithread mgr?
> 
> From our testing we're quite convinced the problem lies in mgr, that it 
> can't keep up with metadata requests from the clients.

Actually those messages are not referring to any sort of queuing on the
manager at all - they refer to the pvfsdev_enqueue/dequeue functions in
the kernel module which add/remove messages from the /dev/pvfs-req
device.


-- 
Nathan Poznick <poznick at conwaycorp.net>

Three may keep a secret if two of them are dead. - Benjamin Franklin

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