Date: Wed, 11 May 2005 14:55:16 -0400 From: Chuck Swiger <cswiger@mac.com> To: Mario Lopez <mario@lar3d.com> Cc: freebsd-isp@freebsd.org Subject: Re: File system mirroring for SMTP/POP Servers Message-ID: <42825514.60105@mac.com> In-Reply-To: <6.1.1.1.2.20050511200547.03d10418@mail.lar3d.com> References: <6.1.1.1.2.20050511200547.03d10418@mail.lar3d.com>
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Mario Lopez wrote: [ ...failover for POP... ] > I have read about file system mirroring over NFS but it looks like > something in development than a mature solution. This is a really hard problem domain to deal with. The reason why you see references to NFS is that people used to provide redundant mail spool access via NFS or one of the more complex network filesystems like AFS (which would provide read-write access, rather than read-only access in the case of the main server going down). Given that reading mail directly via an NFS-mounted spool predates remote mail access via POP/IMAP, I'm not convinced you're going to find a solution you consider "mature", so you might wish to re-evaluate this criteria. :-) How many hours of unexpected downtime has this mail server had over the past year? What is your budget? Are you willing to pay for a SAN and fibre channel connectivity for parallel mailreader boxes, rather than going the NAS route, then? -- -Chuck
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