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Hibernate version: 1.2

Name and version of the database you are using: SQL Server 2000

Hi,

Does the in-memory caching of NHibernate objects have any issue in a load-balanced web farm or are objects only cached for the life of a sesssion (e.g. Page Request).

Kind regards,

Stuart Jones

I'm sure this is an easy question....

However, I've found after much searching the first level cache survives the length of the session but second level cache is process wide.

NHibernate, according to at least one 3rd party vendor, does not support distributed second level caching meaning it should effectively be disabled in this scenario (e.g. when using Windows load-balanced web servers).

Would this be the consensus or are there any distributed second level cache projects out there aside from commercial implementations?

There is a commercial distributed cache implementation (search this forum), you could try the memcache client cache provider in 1.2, and I've been slowly trying to write a distributed cache for NH for a long time.

It's not that NH doesn't support it, but that distributed caching is rare in .NET so there are few options.

To be honest, I am not bothered about second level caching at present but I do work with load balanced web servers - hence I'd much rather not risk integrity issues and just disable 2nd Level caching for now.

I guess all I am asking now is is that a common policy?