Re: DirectoryStorage on NFS?

On Friday 05 Nov 2004 20:57, J C Lawrence wrote:
> On Thu, 4 Nov 2004 08:29:21 +0000
> Toby Dickenson <[email protected]> wrote:
> > On Thursday 04 Nov 2004 00:59, J C Lawrence wrote:
> >> Will DirectoryStorage run correctly in a situation where the database
> >> is on an NFS mountpoint?
> >
> > I dont see why it shouldnt work, but Im happy to admit to being an NFS
> > novice.
>
> Me also in this degree.
>
> > I *think* all directory operations are synchronous on NFS, so it
> > should be safe without that operation.
>
> The only thing that I'm absolutely certain on with regard to NFS is that
> the only operation which NFS guarantees to be atomic is creat(2).  There
> are no guaranteed atomic operations under NFS prior to NFS v4.  That
> translates to most directory semantics being synchronous, just not quite
> all.

There are few guaranteed atomic operations between independent NFS clients, or 
between NFS clients and local (non-NFS) access to the same files. Im sure 
that means you dont want to allow concurrent access to your storage data from 
seperate NFS clients. 

> > Try this patch for now. If it works out we can create a configuration
> > file option.
>
> It works!

Hurrah. A configuration option for this will be in 1.1.13


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