[horde] Guidance on SQL vs. NoSQL storage

[Nels Lindquist]

Hi, all.

We recently added a node to our Horde access server, and I figured I'd 
take the opportunity to try out MongoDB as a NoSQL storage method for 
shared data across the cluster.

Unfortunately it hugely spiked the load on the server, and I ended up 
backing out the config and reverting to PostgreSQL for the shared storage.

Is there any guidance or recommendations for the kinds of data it might 
be appropriate to consider using one over the other? eg. ActiveSync 
caching vs. IMAP caching vs. session data, preferences, etc.?

Thanks very much.

Nels Lindquist
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<nlindq at maei.ca>