[linux-lvm] Page cache corruption when creating a snapshot
Stuart D. Gathman
stuart at bmsi.com
Fri Feb 29 19:53:06 UTC 2008
On Fri, 29 Feb 2008 ghudson at MIT.EDU wrote:
> rm -rf /tmp/test
> mkdir /tmp/test
> # Put around 60MB of files into /tmp/test
> find /tmp/test -type f | xargs md5sum > /tmp/sum.pre
Ran the last four lines several times on my Centos-5 system with
/tmp and the snapshot VG on different volume groups. (/tmp on rootvg)
# du /tmp/test
84688 /tmp/test
# lvs backvg2/DFL
LV VG Attr LSize Origin Snap% Move Log Copy%
DFL backvg2 -wi-a- 10.00G
> lvcreate --size 2G --snapshot /dev/backvg2/DFL --name DFL_snap
> find /tmp/test -type f | xargs md5sum > /tmp/sum.post
> lvremove -f /dev/backvg2/DFL_snap
> diff -u /tmp/sum.pre /tmp/sum.
Doesn't seem to fail for us. (Sighs with relief.)
--
Stuart D. Gathman <stuart at bmsi.com>
Business Management Systems Inc. Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flammis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.
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