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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: [Xen-users] Xen 4.0 feature request
More than thinking that it is possible, I do it every single day. It works, and it works well. :) There's no reason not to have dedicated Logical Volumes for every domU. It makes dealing with the data backend a lot easier, as the volume management becomes incredibly logical and well labeled. Best Regards Nathan Eisenberg Sr. Systems Administrator Atlas Networks, LLC support@xxxxxxxxxxxxxxxx http://support.atlasnetworks.us/portal -----Original Message----- From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Enrico Valsecchi Sent: Tuesday, July 07, 2009 6:48 AM To: Simon Hobson Cc: xen-users@xxxxxxxxxxxxxxxxxxx Subject: 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. > Sorry, 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.... ....good? 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?????????? Enrico _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users
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