A while back, I attended a NEJUG Spring SIG presentation made by Oracle on its new Coherence product. This product is an implementation of an in-memory cache (now known as a “data grid”). Although there are a number of holes in the implementation, there is much promise in this technology and it is worth a look. Check it out by clicking here.

Note that the other big player in this space is GemStone’s GemFire. This product is based on the GemStone in memory cache system that was used in their Object Database product line for 20+ years. Understandably, it is more mature with more of the “holes” covered. You can see info on GemFire here