Date: Wed, 4 Nov 1998 01:13:39 -0800 (PST)
From: Michael Callahan <mjc@rodagroup.com>
To: lwn@lwn.net
Subject: beta info for Understudy failover product for Linux (fwd)

My company, PolyServe, is currently in beta-test with a product that does
IP alias fail-over on Linux (also Solaris and soon NT).  Basically: you
install our product on a couple servers on the same subnet; daemons run on
both that monitor the health both at an OS and application level of one or
more IP aliases;  and in the event of hardware/OS/application failure, the
IP alias is moved from primary to backup.  Both machines can do other
things as well and, in fact, each can back up the other.  Our initial
product only handles clusters of two servers; of course, you can have
multiple pairs of machines in separate clusters.  The initial product also
doesn't handle replicating data; you have to do that yourself.

We'd be very glad to have more beta testers in the Linux community.
Please email mjc@rodagroup.com for more information if you're interested,
or if you have any comments or questions.