On 3/11/2012 9:17 PM, Peter Schuller wrote: >> multithreaded_compaction: false > Set to true. I did try that. I didn't see it go any faster. The cpu load was lower, which I assumed meant fewer bytes/sec being compressed (SnappyCompressor). I didn't see multiple compactions in parallel. Nodetool compactionstats behaved strange and instead of showing individual compactions with a %-complete it showed a running count of total bytes compacted. (Darn, I don't have the output of that anymore in my terminal buffer.) It just didn't look good to me. Are you positive that it is faster with leveled compaction? I don't understand why I don't get multiple concurrent compactions running, that's what would make the biggest performance difference. Is the compaction parallelism perhaps only across multiple CFs? That would explain what I see.
Thorsten
