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From Sylvain Lebresne <>
Subject Re: max_compaction_threshold removed - bad move
Date Wed, 09 Jan 2013 15:56:23 GMT
On Wed, Jan 9, 2013 at 4:21 PM, Radim Kolar <> wrote:

> removing max_compaction_threshold in 1.2 was bad move, keeping it low
> helps compaction throughput because it lowers number of disk seeks.

It hasn't been removed, it has been renamed max_threshold and moved into
the compaction options map for CQL3 (nothing has changed for thrift or
CQL2). The CQL3 reference doc hasn't been updated correctly however, which
I'll fix.

> if you have redhat linux, check during install category "performance
> tools" or something like that, you will get tools for disk monitoring.
> Learn to use them.

Obviously no Cassandra dev has ever heard of a "disk monitoring tool".
That's so helpful and not at all condescending for no good reason, thanks


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