Russell Alexander Spitzer created CASSANDRA-7631:
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Summary: Allow Stress to write directly to SSTables
Key: CASSANDRA-7631
URL: https://issues.apache.org/jira/browse/CASSANDRA-7631
Project: Cassandra
Issue Type: Improvement
Components: Tools
Reporter: Russell Alexander Spitzer
One common difficulty with benchmarking machines is the amount of time it takes
to initially load data. For machines with a large amount of ram this becomes
especially onerous because a very large amount of data needs to be placed on
the machine before page-cache can be circumvented.
To remedy this I suggest we add a top level flag to Cassandra-Stress which
would cause the tool to write directly to sstables rather than actually
performing CQL inserts. Internally this would use CQLSStable writer to write
directly to sstables while skipping any keys which are not owned by the node
stress is running on. The same stress command run on each node in the cluster
would then write unique sstables only containing data which that node is
responsible for. Following this no further network IO would be required to
distribute data as it would all already be correctly in place.
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