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From James Golick <>
Subject Compaction bringing a node to its knees
Date Sat, 29 May 2010 19:55:07 GMT
I just experienced a compaction that brought a node to 100% of its IO
capacity and made its responses incredibly slow.

It wasn't enough to make the node actually appear as down, though, so it
slowed down the operation of the cluster considerably.

The CF being compacted contains a lot of relatively wide rows (hundreds of
thousands or millions of columns on the big end). Is that the problem?

Any suggestions on how to minimize impact here?

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