This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


Re: [Xen-users] Xen 4.0 feature request

Why can't you save only one VM with LVM snapshots? Sounds like you have an odd implementation, rather that there being a problem with LVM. We export two LVs per domU - 1 'data' and 1 'swap'. I can easily snapshot the 'data' LV of any single domU without a performance problem.

How do you deal with the fact that you are snapshotting a dirty state ? Unless you are using LVM inside the DomU (in which case Xen is irrelevant), then when you make a snapshot, it will NOT include any dirty blocks in the guests cache.

Unless you collaborate with the guest, get it to stop updating the filesystem, and flush it's cache - then you are pretty well guaranteed dirty (and probably corrupt) data.

but I think that are more cleaned that if you want manage a XEN consistent snapshot, XEN must have this function!

O.K., you CAN use other external tool to have a consistent snapshots.
Very unique mode are use LVM, BUT, if you want have use a LVM snapshot, you MUST have dedicated LMV volume for ANY virtual machine....

You think really that, in a scenario with 30/50/100/150 active virtual machine, is possible use a dedicated LVM volume for any machine??????????


Xen-users mailing list