Questions about XenServer Delta Snapshots

[Mike Tutkowski <mi...@solidfire.com>]

Hi,

I've been playing around with XenServer snapshots a bit today and had a
couple questions.

This is in reference to the snapshot diagram here:

http://i.imgur.com/F1grmIp.png

If I revert my VM to state E:

1) Do I lose state D entirely (I believe I do unless I first take a
snapshot of it)?

2) If I start to write data to state E and later decide I didn't want that
data, is there a way to get back to a clean state E again?

Thanks!

-- 
*Mike Tutkowski*
*Senior CloudStack Developer, SolidFire Inc.*
e: mike.tutkowski@solidfire.com
o: 303.746.7302
Advancing the way the world uses the
cloud<http://solidfire.com/solution/overview/?video=play>
*™*

Re: Questions about XenServer Delta Snapshots

[Mike Tutkowski <mi...@solidfire.com>]

I've done more research into this and figured I'd send out my findings to
the group:

1) Yes

2) It seems you never write to state E. If you revert to state E, what
happens is you get a new state that is the same as state E (in the diagram,
envision state D being gone after reverting to state E and a new state F
that's the Active state alongside state E - F is the Active state, so
that's where your writes/reads go to).


On Fri, Dec 13, 2013 at 11:35 PM, Mike Tutkowski <
mike.tutkowski@solidfire.com> wrote:

> Hi,
>
> I've been playing around with XenServer snapshots a bit today and had a
> couple questions.
>
> This is in reference to the snapshot diagram here:
>
> http://i.imgur.com/F1grmIp.png
>
> If I revert my VM to state E:
>
> 1) Do I lose state D entirely (I believe I do unless I first take a
> snapshot of it)?
>
> 2) If I start to write data to state E and later decide I didn't want that
> data, is there a way to get back to a clean state E again?
>
> Thanks!
>
> --
> *Mike Tutkowski*
> *Senior CloudStack Developer, SolidFire Inc.*
> e: mike.tutkowski@solidfire.com
> o: 303.746.7302
> Advancing the way the world uses the cloud<http://solidfire.com/solution/overview/?video=play>
> *™*
>



-- 
*Mike Tutkowski*
*Senior CloudStack Developer, SolidFire Inc.*
e: mike.tutkowski@solidfire.com
o: 303.746.7302
Advancing the way the world uses the
cloud<http://solidfire.com/solution/overview/?video=play>
*™*