As you probably know by now, we are using Couchbase for caching data on our web site. However Couchbase contains support for not just cache data, but also for persistent data that is stored on disk using a NoSQL architecture. Once we were actively using Couchbase for our caching tier, the next step was to use it for storing data. The first thing we decided to move to Couchbase, was our session data, which up until that point had been stored in MySQL.

Continue Reading →

In my previous blog post I discussed how we converted from a file based caching solution to one based on Couchbase. In this blog post I am going discuss the system we built to group cache entries together into logical groups, and the mechanism used to quickly invalidate all cache entries for a particular group using sentinels rather than lists.
Continue Reading →

Recently as we spent a lot of time trying to sort out performance issues on our web site, we spent a lot of time going over our caching system and working to improve it. Our old caching system was originally written to use the file system, which actually worked really well when the site used to run under Linux. But it was beginning to show it’s age and was really expensive to maintain, so we started looking for alternative. I looked at a number of different options, and had read a lot about memcached, but alas I could not find any good memcached implementations for Windows which I needed for our development and testing. That is until I came across Couchbase while I was researching the option of using NoSQL for parts of our web site for the future. Not only is Couchbase a super fast NoSQL database, it is also entirely memcached compatible so makes is a great commercial memcached implementation. And it runs on Windows!


Continue Reading →