Hi,
i'd like to announce the relase of a plugin for the backup of LVM partitions.
I developed this scripts to handle the backup of my virtual servers.
This is an extract of the documentation:
While doing backups of virtual servers, there are typically two critical
requirements:
1. to have almost zero downtime for the services running on the virtual
machine (suppose that the machine is a web server or a database server);
2. the backup must be done syncing the file system in a consistent status;
a typical example is a database server that must be copied when the
processes
are idle, the cache is flushed and there is no stale data around.
These two requirements are conflicting: stopping the critical processes for
the time required by the backup is likely to cause a long downtime of the
services.
This BackupPC add-on helps you in solving this problem, by leveraging on the
snapshot features of LVM. The scripting framework will quickly take a
snapshot
of the virtual machines in idle status and, while the services become up
again, the backup system can take a backup of the frozen snapshot system
safely.
At the end of the process we will have a backup of any virtual machine with
a
service downtime of the order of few seconds.
I have been used this system over the past years so i can say that it works
pretty well for my xen virtual machines.
I'm waiting for the authorization to publish the documentation in the backuppc
wiki; for now you can find all the informations about this product here:
http://www.biodec.com/tools/software/backuppc-lvm
Kind regards.
Alberto Eusebi
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