Date: Tue, 15 Aug 2006 11:20:47 -0700 From: Chuck Swiger <cswiger@mac.com> To: Phil Regnauld <regnauld@catpipe.net> Cc: freebsd-net@FreeBSD.ORG, Brian Candler <B.Candler@pobox.com> Subject: Re: Redundant/failover NFS servers - stale NFS file handle Message-ID: <6FAF95DA-76D5-4D72-A3C5-88AEA6F13267@mac.com> In-Reply-To: <20060815123032.GR8503@catpipe.net> References: <200608141555.k7EFthXw092647@lurza.secnetix.de> <44E0C450.8050602@fsn.hu> <20060815122533.GB89848@uk.tiscali.com> <20060815123032.GR8503@catpipe.net>
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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. -- -Chuck
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