Xen FAQ High Availability

High Availability Questions

Services

What software exists for Xen to handle high availability?

A (HA1.0): Here are several tools that currently exist:

• CentOS Cluster
• Project Kemari - http://www.osrg.net/kemari/
• Project Remus - http://blog.xen.org/index.php/2009/04/02/project-remus-released/
• Linux Cluster Resource Manager - http://clusterlabs.org/mediawiki/images/f/fb/Configuration_Explained.pdf

How do snapshots work on Xen?

I'm not sure about how snapshots works on Xen. For example, if I snapshot a DomU with 10GB HD will take, for example, 30 seconds. But, if I snapshot a DomU with a 100GB HD will take longer (I guess).

So, I wanna know how the snapshot works on xen. What if I want to move a snapshotted with a 100GB HD from a Dom0 to another Dom0? I've to move a 100GB file?

You could try this approach:

http://www.infohit.net/blog/post/using-lvm2-snapshots-to-provide-rollback-functionality-for-xen.html

Makes snapshots quite quick.