[linux-lvm] Very slow i/o after snapshotting

Micky mickylmartin at gmail.com
Tue Jul 9 01:37:01 UTC 2013

On a machine, where weekly snapshots are created for dumping raw data,
the overall disk i/o has drastically degraded to few megabytes per
second. It is quite random and so slow that commands freeze often.

I was using chunk size of 512K and same byte size with dd.

Is it quite common; I read that such freezes require a reboot. Is
there a way to avert?
What am I missing here?

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