On Tue, Oct 25, 2011 at 5:23 AM, Alexandru Sicoe <adsi...@gmail.com> wrote:

> At the moment I am partitioning the data in Cassandra in 75 CFs


You might consider not using so many column families. I am not a Cassandra
expert, but from what I've seen floated around, there is currently a unique
memtable, commit log, and sorted-table fileset per column-family. As a
result, you can both use less memory (for memtable) and get higher write
throughput by using one column family than 75.  An alternative to column
families is using key-prefixing.

Perhaps someone with more definitive knowledge can chime in.

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