[CentOS] Disk accounting with LVM Snapshots
Mike Fedyk
mfedyk at mikefedyk.com
Thu May 17 19:35:38 UTC 2007
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=240476
Mike Fedyk wrote:
> Hi,
>
> I was reading a lot of data from one LVM logical volume and wanted to
> watch the disk statistics with iostat today. To my surprise, I was
> seeing the same activity on two logical volumes (LV) and the physical
> disk containing the two.
>
> A little investigation showed that one LV was a snapshot of the other,
> and I was reading from one of the snapshots.
>
> While I understand that the two LVs share some common Logical Extents
> (LE), I believe it is a bug that the disk statistics show the activity
> on both logical volumes.
>
> Should I report this in the centos bugzilla or upstream's bts?
>
> Thanks,
>
> Mike Fedyk
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