O'Reilly logo

IBM WebSphere eXtreme Scale 6 by Anthony Chaves

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

BackingMap and Loader

The following problem does not exist in WebSphere eXtreme Scale version 7.0 and later. eXtreme Scale 7.0 solved the problem of writing data to a database out of order. The problem applies only to eXtreme Scale pre-7.0. The solution to this problem is left in as an example of using "soft references" to other objects and it remains a useful technique. We've seen that each BackingMap has its own instance of a Loader. Because each BackingMap uses the Loader to sync with the database according to its own conditions, we end up with different BackingMaps syncing at different times. Most of the time, we expect this to be a good thing. There are only four BackingMaps in our application that sync with the database (as seen below), ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required