Home | Chapter 1. Web site performance
Web site caching
In the first part of this Redbook we introduce Web site caching. If DynaCache is new to you, we recommend you read the first four chapters and then skip chapters 4 and 6 and go to the second part of the Redbook.
Chapter 1, Web site performance, is important especially if you haven't thought about the underlying strategies you need adopt to build web sites with good performance. Performance is not something that can be compartmentalized into a tuning task right at the end of testing a web site. It should be a main consideration before, during and after development, as no web site ever stands still.
Chapter 2, Caching, starts and the beginning - how do caches work? By the end of the chapter you should understand how to define a cache for WebSphere Commerce and how to store and retrieve items from the cache.
In Chapter 3, DynaCache invalidation, we discuss how to evict items from the cache. This is just as import as building and using the cache. If stale items are left in the cache then the web site will display wrong, out of date information.
Chapter 5, Caching strategy steps back from the mechanics of defining a cache and putting items in and getting them out. We invite you to think about what to cachem and how to design a good caching policy for a web site.
Chapter 4, Clustering DynaCache shows how to use the symmetric clustering in WebSphere Network Deployment, with DynaCache. It explains how to control cache replication across a cluster. How do you achieve the best balance between using multiple processors and moving cached items to different servers on the cluster. Appendix | , Caching in WebSphere Extended Deployment takes the use of clustering in WebSphere Commerce a further step and shows how to partition a cache to make the most use of in memory caching.
Chapter 6, Advanced topics covers a number of topics including what's new in WebSphere Commerce v6, and tuning the cache. There is also a short reference section which adds some additional usage notes to the descriptions in the Infocenter.
Chapter 7, FAQs answers some commonly asked questions about WebSphere Commerce and DynaCache.