Robust Cyrus design

[Rob Siemborski]

On Thu, 29 Jan 2004, Prentice Bisbal wrote:

> Proposed Design 2:
> ------------------
> Use 3 servers set up in a Murder aggregate as described
> http://asg.web.cmu.edu/cyrus/ag.html. It is believed that this will
> provide some failover protection, but I disagree. Again, the files will
> be stored on the SAN.

This depends on what you mean by "some failover protection".  (Also what
you mean by "3 servers"  -- 3 frontends, 3 backends, etc?)

It makes the failure of some part of the system more likely (more pieces
make things more likely to break).  However, in the event of a failure,
you will only loose a portion of the system (provided, of course, you
don't mean 1 frontend, 1 backend, and 1 mupdate server).

-Rob

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Rob Siemborski * Andrew Systems Group * Cyert Hall 207 * 412-268-7456
Research Systems Programmer * /usr/contributed Gatekeeper