Re: Help with non-standard mod to NFS Kernel daemon ...
Dale Harris (rodmur@maybe.org)
Tue, 30 Nov 1999 10:26:02 -0700
On Tue, Nov 30, 1999 at 04:55:52PM +0000, Mark O'Neill elucidated:
> One of the nicest aspects of this system is a shared heap model which
> permits processes to use mmap() (as opposed to sbrk() to create and share
> data heaps. The problem is while this works very nicely if the
> co-operating processes are on the same machine, it fails under NFS because
> user processes on a client machine cannot tell the NFS kernel daemon on
> that machine to flush all cached data back to the physical file on the
> NFS server. How hard would it be to implement an additional system call
> [say nfssync()] to perform this function? Typically this would not impinge
> on NFS filesystem performance, as this (slow) operation would only need to
> be called when a process has finished modifying a shared heap in order to
> provide up-to-date data for other clients of that heap.
>
I wonder if it would be better to use CODA, or similar shared FS, as
opposed to NFS in this situation. I don't have any strong knowledge of
NFS standards, but I wonder if a nfssync() would be possible, and still
be compliant with the standards out there. It wound't seem useful if it
only worked on Linux boxen.
--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Dale Harris <rodmur@maybe.org> GPG key: 372FBD57 http://www.maybe.org/
Maybe is an Ambivalent Yet Beguiling Enigma
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