On Fri, 12 Apr 2002, John Orthoefer wrote:
>
>
> Rich Graves wrote:
>
> >Mailbox replication is nearly impossible due to locking problems and other
> >race conditions. You can route around this in two ways: get clever down the
> >stack with a snapshotting filesystem (LVM or if you have the means, get a
> >pair of NetApps with SnapMirror), or get clever up the stack by rethinking
> >the application.
> >
> I don't think it's right to call it "nearly impossible". If you dump
> your e-mail into an Oracle DB, you can use Oracle to keep each
> transaction against several datastores in sync. And I can't claim to be
> a DBA or anything but I've been told that Oracle can keep several copies
> of a database in-sync with fall-back servers and all.
>
> I don't know of one...but I wouldn't be suprised if Oracle didn't have
> an IMap client that uses the database as the storage. And it should be
> preaty trival to do.
Unless they have changed it recently, AOL uses a large Oracle farm to
handle their email. Granted, they have their own protocol on top of it
instead of imap, but it is a proof of concept.
Andt
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