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From Roland Gude <>
Subject AW: AW: Two versions of schema
Date Tue, 19 Apr 2011 13:01:54 GMT
Yeah it happens from time to time even if everything seems to be fine that schema changes don't
work correctly. But it's always repairable with the described procedure. Therefore the operator
being available is a must have I think.

Drain is a nodetool command. The node flushes data and stops accepting new writes. This just
speeds up bringing the node back up again in this case. Probably a flush is equally acceptable.

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Von: mcasandra [] 
Gesendet: Montag, 18. April 2011 18:27
Betreff: Re: AW: Two versions of schema

In my case all hosts were reachable and I ran nodetool ring before running
the schema update. I don't think it was because of node being down. I tihnk
for some reason it just took over 10 secs because I was reducing key_cache
from 1M to 1000. I think it might be taking long to trim the keys hence 10
sec default may not be the right way.

What is drain?

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