"kill performance" is relative. Leveled Compaction basically costs 2x disk IO. Look at iostat, etc and see if you have the headroom.There are also ways to bring up a test node and just run Level Compaction on that. Wish I had a URL handy, but hopefully someone else can find it.Also, if you're not using compression, check it out.--On Thu, Nov 8, 2012 at 11:20 AM, B. Todd Burruss <email@example.com> wrote:
we are running Datastax enterprise and cannot patch it. how bad is
"kill performance"? if it is so bad, why is it an option?
On Thu, Nov 8, 2012 at 10:17 AM, Radim Kolar <firstname.lastname@example.org> wrote:
> Dne 8.11.2012 19:12, B. Todd Burruss napsal(a):
>> my question is would leveled compaction help to get rid of the tombstoned
>> data faster than size tiered, and therefore reduce the disk space usage?
> leveled compaction will kill your performance. get patch from jira for
> maximum sstable size per CF and force cassandra to make smaller tables, they
> expire faster.
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