Windows NT 4.0 servers in a high-availability cluster. In eWeek Labs' tests, the product performed admirably, failing-over to a secondary server within just a few seconds when we disconnected test machines from a cluster.
Many companies now provide clustering technology to produce high availability.
Tandem Computers, Sun Microsystems Inc. and Stratus Tech nologies Inc. have very competitive products for the Unix environment, which has long been known for its reliability and scalability. Marathon officials said that an Endurance 6200 array provides nonstop processing, continuous data access, uninterrupted connectivity and disaster tolerance using standard NT and shrink-wrapped applications. Failover is quicker with Marathon's product than with Microsoft's because the Endurance 6200 works as an array. When something goes wrong with one server, users don't see a difference in performance and, after the problem is fixed, the two servers performing as compute elements mirror each other to capture changes in data. In tests of Endurance 6200, we focused on its failover capability and the reliability of data exchanges.