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From Flavio Baronti <>
Subject Tiered compation on two disks
Date Thu, 21 Jun 2012 10:56:03 GMT

I have a Cassandra installation where we plan to store 1Tb of data, split between two 1Tb
Tiered compation should be better suited for our workload (append-only, deletion of old data,
few reads).
I know that tiered compaction needs 50% free disk space for worst case situation. How does
this combine with the disk 
split? What happens if I have 500Gb of data in one disk and 500Gb in the other? Won't compaction
try to build a single 
1Tb file, failing since there are only 500Gb free on each disk?


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