[Moin-user] 1.5.1 NFS safe?

David Paul Zimmerman dpz at ack.berkeley.edu
Fri Feb 3 14:33:50 EST 2006

On Feb 2, 2006, at 4:56 AM, Thomas Waldmann wrote:

>>> My hope is that moinmoin does nfs safe write locking of its data 
>>> files since they'll be shared between the load balanced servers that 
>>> way.
> I wouldn't recommend running moin over NFS for performance reasons 
> (except if your NFS stuff is as fast as a usual local disk :)).

I'll have to presume so :-)  (Actually, I think they have some 
high-performance NFS product in back.)

> Locking is a good question. :)
> If we lock at all, we use some platform independant code supporting 
> win32 and posix. See MoinMoin/util/lock.py for example. It is based on 
> directory creation (and failure of that if there is already one with 
> that name) and should work on all platforms.
> Some places still miss locking completely, but for usual use patterns, 
> this is rarely a problem.
> Some places use own "locking" code (also base on usual filesystem 
> operations) that rarely has problems.

Hm... I'll give lock.py a look.  I'll also come up with a Plan B.

Thanks for the insight!


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