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Jon Haddad commented on CASSANDRA-8460:
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Would you mind sharing the commands you used to set up the LVM Cache? It's
pretty easy to accidentally set up the pool as a balance of the 2 drives rather
than using the SSD as a cache.
Both implementations are going to work best with TWCS, so I think that testing
the workload with TWCS using time series writes is going to be a lot more
productive than random writes, as you've noted.
> Make it possible to move non-compacting sstables to slow/big storage in DTCS
> ----------------------------------------------------------------------------
>
> Key: CASSANDRA-8460
> URL: https://issues.apache.org/jira/browse/CASSANDRA-8460
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Marcus Eriksson
> Assignee: Lerh Chuan Low
> Priority: Major
> Labels: doc-impacting, dtcs
> Fix For: 4.x
>
>
> It would be nice if we could configure DTCS to have a set of extra data
> directories where we move the sstables once they are older than
> max_sstable_age_days.
> This would enable users to have a quick, small SSD for hot, new data, and big
> spinning disks for data that is rarely read and never compacted.
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