Snapshop and Snapclone

[Feljav]

What is the diference between snapclone and snapshop?

[Ivan Ferreira · Accepted solution]

A snapshot is intended to short term use, like backups. You can have demand allocated snapshots so you don't need to use the same storage space as the original device. You only will copy the data as is modified in the source disk. Snapshots normally are attached to the original disk, for example, if you erase the original disk, the snapshot have to be erased also.

Snapclones normally are intended for data that will persist a little for, for example, snapclones can be taken from production for pre-production processing or testing. Snapclones become totally independent disks.

[Amar_Joshi]

As I learned in my very first class.

Snapclone is used very often to creates exact copy of a volume. It uses the equal space of the original volume.

Snapshot creates an empty volume of ~0GB and fills it (and increases the size of snapshot volume) as the data changes occur on primary volume. Is a snapshot volume is presented to a host it will present the primary volume but any data, which is changed on Primary volume will be copied over to Snapshot volume and will be pointed there. So the host still see the data as of the time snapshot was created.

[Mark...]

Hi,
Just to clear up the above:
2 types of snapclone
1: demand allocated
2: fully alloacted
You also need a Business Copy [BC] licence
Both must be from the SAME disk group
demand allocated, only takes space as required but can grow to be the same size as the source LUN if left long enough. If you run out of unassigned space then your snapclone will be dissolved - called overcommit.
Fully allocated snapclone - you have to have enough unassigned space in the first place to create it, but it may never become full so can be a waste of space!
Max of 7 snapshots per LUN
You are not able to create a snapclone with a snapshot is in existance

Snapclone - as stated in a previous answer is a full copy, however space can be selected from a different disk group if you wish.

Mark...