Re: [Qemu-devel] [RFC] live snapshot, live merge, live block migration

2011-05-15 Thread Jagane Sundar
Hello Dor, One important advantage of live snapshot over live backup is support of multiple (consecutive) live snapshots while there can be only a single live backup at one time. This is why I tend to think that although live backup carry some benefit (no merge required), the live snapshot + liv

Re: [Qemu-devel] [RFC] live snapshot, live merge, live block migration

2011-05-16 Thread Dor Laor
On 05/16/2011 12:38 AM, Jagane Sundar wrote: Hello Dor, One important advantage of live snapshot over live backup is support of multiple (consecutive) live snapshots while there can be only a single live backup at one time. This is why I tend to think that although live backup carry some benefi

Re: [Qemu-devel] [RFC] live snapshot, live merge, live block migration

2011-05-16 Thread Jagane Sundar
Hello Dor, Let me see if I understand live snapshot correctly: If I want to configure a VM for daily backup, then I would do the following: - Create a snapshot s1. s0 is marked read-only. - Do a full backup of s0 on day 0. - On day 1, I would create a new snapshot s2, then copy over the snapsho

Re: [Qemu-devel] [RFC] live snapshot, live merge, live block migration

2011-05-17 Thread Dor Laor
On 05/16/2011 11:23 AM, Jagane Sundar wrote: Hello Dor, Let me see if I understand live snapshot correctly: If I want to configure a VM for daily backup, then I would do the following: - Create a snapshot s1. s0 is marked read-only. - Do a full backup of s0 on day 0. - On day 1, I would create a

Re: [Qemu-devel] [RFC] live snapshot, live merge, live block migration

2011-05-18 Thread Jagane Sundar
Hello Dor, I'm glad I could convince you of the value of Livebackup. I think Livesnapshot/Livemerge, Livebackup and Block Migration all have very interesting use cases. For example: - Livesnapshot/Livemerge is very useful in development/QA environments where one might want to create a snapshot