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From ruslan usifov <ruslan.usi...@gmail.com>
Subject Re: Add node to balanced cluster?
Date Fri, 25 Mar 2011 22:01:06 GMT
2011/3/25 Eric Gilmore <eric@datastax.com>

> Ruslan, I'm not sure exactly what risks you are referring to -- can you be
> more specific?
>
> Do the CPU-intensive operations one at a time, including doing the cleanup
> when it will not interfere with other operations, and I think you should be
> fine, from my understanding.
>

I afraid about disk IO.

I think that move and cleanup opperations consume many IO, so when they run
- throughput of the cluster can degrade seriously? And this nut problem if
this operations took 5-10 minutes, but they cant run hours (1,5 - 2)  - and
this is on one node, so fully rebalance can took days with the seriouse
problems in throuput at that period.

Or i exaggerate?

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