218z/TPF and WebSphere Application Server in a Service Oriented Architecture
z/TPF out-performs even fault tolerant products for overall availability. This is not only
because z/TPF has many fault tolerant features (as well as the zSeries box itself) but is also
due to the fact there are many features that avoid outages for common maintenance. For
example, entire application packages can be loaded and removed while messages are in
flight.
Databases and even network configurations can also be changed without an outage. Truly
going the distance, you can even migrate from TPF to z/TPF without and outage. As a result
many existing customers report overall availability numbers from a low of 97.8% to as much
as 99.999%. In practice, it is extremely ...
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