On 16 mai 2012, at 16:06, Manik Surtani wrote:


On 14 May 2012, at 18:48, Emmanuel Bernard wrote:

I agree with Sanne, Cassandra is very good at that use case due to the way they store things. OTOH, that's their best use case by far :)

We could think about a way to mix together:

- fine grained locking
- AtomicMap
- partial load

basically we could imagine some new primitive features for AtomicMap like:

- get subkeys between x and y
- add subkey (not requiring to load the AtomicMap)

That would get us a long way towards some of what MongoDB does wrt partial document update.

Don't we have a good deal of this already with Randall's schematic patch (currently as a part of ModeShape, targeted for inclusion in Infinispan 5.2.0)?

https://issues.jboss.org/browse/ISPN-1103
https://github.com/ModeShape/modeshape/tree/master/modeshape-schematic

It certainly does partial update, but not the partial load required to do the time range query described. Unless schematic goes beyond what I think it does.