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From Oliver Plohmann <>
Subject Loading data on-demand in Cassandra
Date Sun, 12 Aug 2012 19:24:43 GMT

I'm looking a bit into Cassandra to see whether it would be something to 
go with for my company. I searched through the Internet, looked through 
the FAQs, etc. but there are still some few open questions. Hope I don't 
bother anybody with the usual beginner questions ...

Is there a way to do load-on-demand of data in Cassandra? For the time 
being, we cannot afford to built up a cluster that holds our 700 GB 
SQL-Database in RAM. So we need to be able to load data on-demand from 
our relational database. Can this be done in Cassandra? Then there also 
needs to be a way to unload data in order to reclaim RAM space. Would be 
nice if it were possible to register for an asynchronous notification in 
case some value was changed. Can this be done?

Thanks for any answers.
Regards, Oliver

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