Retaining commit logs

[Narendra Sharma]

Cassandra Version: 0.6.5

I am running a long duration test and I need to keep the commit log to see
the sequence of operations to debug few application issues. Is it possible
to retain the commit logs? Apart from increasing the value of
CommitLogRotationThresholdInMB
what is the other way to achieve this? The commit logs are deleted when
Memtable is flushed.

Thanks,
Naren