Re: Redundant/failover NFS servers - stale NFS file handle

On Tue, Aug 15, 2006 at 11:20:47AM -0700, Chuck Swiger wrote:
On Aug 15, 2006, at 5:30 AM, Phil Regnauld wrote:
Brian Candler (B.Candler) writes:
So to make an update, you would have to unmount from box 2,
remount RW on
box 1, make the change, remount RO on box 1, and mount RO again on
box 2.

To make it short: if you want a reliable NFS head, you need NetApp.
If you want to make failover, you'll need something like WAFL that
has virtual inodes and allows for concurrent access from multiple
writers. This is more of a freebsd-fs discussion.

I think Solaris also makes a reliable NFS platform, and it even
supports failover and replication for read-only mounts. For read/
write replicated filesystems, you're probably looking at AFS (Andrew
File System, but an opensource version is at www.openafs.org from
IBM, who apparently bought out Transarc) or maybe Coda.

Hmm, I'm not sure I'd want to run Maildir on either of those, or at least
Coda. When I looked at Coda, ISTR you could have conflicting updates in
disconnected operation which required manual intervention to fix. Admittedly
this was a few years ago, maybe things have moved on since then.

Regards,

Brian.
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