Fwd: rbd: show the snapshot tree

[Dongsheng Yang <dongsheng.yang@xxxxxxxxxxxx>]

Resending.....

as the mailing list does not accept too large mail. I removed the
attachments from the original message.

Please refer to [1] for the pictures.

[1]: https://github.com/ceph/ceph/pull/13870#issuecomment-287042199

Thanx
Dongsheng

-------- Original Message --------

Subject:	rbd: show the snapshot tree
Date:	Fri, 17 Mar 2017 11:50:17 +0800
From:	Dongsheng Yang <dongsheng.yang@xxxxxxxxxxxx>
To:	'Ceph Users' <ceph-users@xxxxxxxxxxxxxx>
CC:	jason <jdillama@xxxxxxxxxx>, chenhanxiao@xxxxxxxxx

Hi guys,

     There is an idea about showing the snapshots of an image in a tree 
view, as
what vmware is doing in screenshot attached(vmware.jpeg).

     So I think that's a good to implement a similar feature in rbd, as 
attached(rbd_snap_tree.jpeg).
But, is that a hot requirement for us? as Jason mentioned, A rollback is 
a pretty large sledgehammer
(i.e. not efficient) approach to switch between a hierarchy of 
historical configurations. Maybe clone is
much better. If so, the hierarchy of snapshots is not a "tree", but a 
"line".

     Therefore, I am here to collect more opinions on this topic. What 
do you think about this feature?

BTW, Jason provide another idea, show a tree view about the relationship 
between parents and
children. Yea, that's another idea, but I think that's good. what do you 
think about this one?

Thanx
Dongsheng

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