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High I/O on idle Swift devices

 

Hi,

I built 4 node test swift cluster and stored one 100MB file. Cluster was running 24 hours without any load. During this period, I can see constant read I/O of 3MB/s on each swift device. When I shutdown object-server I/O goes to zero. I've also increased replicator's run_pause to 300 sec, but it didn't help at all.

Is that an expected behavior? What causes such a high I/O on idle system. How can I troubleshoot this?

Many thanks,
Rustam.



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