[Xen-users] LVM backups, backup data not consistent?

Fabian Holler
Tue, 05 Sep 2006 10:07:10 -0000

Hello,

I read much about that LVM snapshot are the ideal way to backup XEN VMs.
But I''m not sure if the data in the snapshot will be really consistent.

AFAIK when i take the snapshot from dom0, the data on domU isn''t synced
to harddisk.
Maybe not all data was written to the harddrive and still stay in the
RAM. When a file wasn''t wrote completly to disk, the snapshot will
contain a corrupt file.
Maybe this is a important data file for an server application, and the
backuped data is corrupted then?
Am I completly wrong? When not what will be a better backup strategy to
ensure data consistency?


greetings

Fabian



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