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No, the distributed filesystem is decoupled from the real servers.
The realservers just access what seems to be a remote file system, they don't
have to know that it is distributed.
They may not even know it's remote - depending on how those technologies are
accessed (ideally they would be mounted as a local
filesystem, transparent to the apps - like NFS).
So at that point it is a problem of the underlying distributed DFS (ditributed
filesystem, whichever it is that you use) to cope
with failing storage nodes, synchronization etc, but that's the main purpose it
was made for, so shouldn't be too big of a deal.
Of course, if you wanted to, you can use the same real servers (physically) for
both storage and mail service, but you would still
have a logically decoupled configuration.
MARK
> -----Original Message-----
> From: lvs-users-bounces@xxxxxxxxxxxxxxxxxxxxxx
> [mailto:lvs-users-bounces@xxxxxxxxxxxxxxxxxxxxxx] On Behalf
> Of Joseph Mack NA3T
> Sent: Thursday, December 15, 2005 11:54 AM
> To: LinuxVirtualServer.org users mailing list.
> Subject: RE: Load balanced mail system
>
>
> On Thu, 15 Dec 2005, Mark wrote:
>
> > How about having a distributed file system (DRBD or
> redhat's "Global
> > File System (GFS)") distributed over 2 or 3 servers to keep the
> > mailbox files, and then having LVS POP clients access those?
>
> if the distributed filesystem is spread amongst the
> realservers, what happpens when a realserver fails or you
> need to shutdown a realserver for maintenance?
>
> Joe
> --
> Joseph Mack NA3T EME(B,D), FM05lw North Carolina
> jmack (at) wm7d (dot) net - azimuthal equidistant map
> generator at http://www.wm7d.net/azproj.shtml
> Homepage http://www.austintek.com/ It's GNU/Linux!
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