Re: Determining Cassandra System/Memory Requirements

2010-05-03 Thread Jonathan Ellis
Short answer: no, there is no formula into which you can plug numbers. Longer answer: benchmark with a subset of your data and extrapolate. The closer the test data is to real data, the more accurate it will be. Yes, compaction is O(N) wrt the amount of data in the system, so don't do it more tha

Determining Cassandra System/Memory Requirements

2010-05-03 Thread Jon Graham
Hello Everyone, Is there a practical formula for determining Cassandra system requirements using OrderPreservingPartitioner ? We have hundreds of millions of rows in a single column family with a potential target of maybe a billion rows. How can we estimate the Cassandra system requirements give