BC license in EVA

[Azadeh]

Hi

with BC license in EVA we can have snapshot and snapclone ... what's the difference between this kind of backup and the software one (ARCserve) ???

Is it possible to have snapshot (with BC license in EVA ) on tape ???

[Johan Guldmyr]

On your second question:

you make a snapshot of a vdisk/LUN (specific point in time). Then you can present/mount this snapshot to a server. Then the server can put this disk on a tape.

[Bhavnish Kamboj (BK)]

yes with BC license you can create snapshot, snapclones but only on EVA. Then you can take the backup from the snapshot by mounting it to any host.

Snapshot is just point it time copy so whenever you read data from sanpshot it actually reads it from its original location. Only changed data gets copied from original location to snapshot one

BK

[Shayne Heidemann]

Straight from the guide.

Snapshots: A standard snapshot (full allocated) is a point-in-time virtual copy of the data, created in seconds and usable immediately, providing maximum flexibility for user applications. Disk capacity is reserved to accommodate the original size of the source volume. This process may be completed by allowing HP Business Copy EVA to automatically execute all tasks in the snapshot creation, or by creating a target container (3-Phase) to accelerate the snapshot creation. Please review the HP Business Copy documentation for more information on this feature.

Vsnaps: Virtually capacity free snapshots (demand allocated) allow the user to create a point-in-time copy, or demand allocated snapshot, of a specified Virtual Disk (LUN). Vsnap is similar to the standard snapshot (fully allocated) except that it does not reserve the same amount of disk capacity as the production volume being copied. The amount of disk capacity used by the copy volume will grow as data in the production volume changes over time or if the Vsnap is set to read/write, and data is written directly to the Vsnap. The result is that a Vsnap is a true space-efficient copy where capacity is not wasted reserving space. This saves valuable capacity and reduces workload by automatically using space as needed.

MirrorClone: MirrorClone provides an alternative to a snapshot by allowing the user to make a full, byte-for-byte, point-in-time copy of a source LUN that can be mounted to a secondary server. MirrorClone will track all changed blocks and can re-sync with the source LUN to create a new point-in-time copy, or can be used to instantly restore the source.

Snapclones: A Snapclone is a complete clone copy of a specified Virtual Disk (LUN). With traditional arrays, a clone can take hours to build depending on its size. Unlike traditional clones, HP Business Copy EVA Snapclones are available virtually immediately. Within a few seconds of when the Snapclone is taken, the entire clone copy is available for use. The Snapclone normalizes in the background so that no time is wasted waiting for the copy to complete. Enterprise Snapclones can also be taken in any redundancy level (RAID 0, 1, or 5). Snapclones provide the ability to take and use a clone without extensive advance preparation. Long "re-synch" times are also eliminated with Snapclones since a current clone copy can be available for use in minutes, not hours. Snapclones can also be created in different disk groups allowing users to copy the data to lower cost drives such as FATA. This process may be completed by allowing HP Business Copy EVA to automatically execute all tasks in the Snapclone creation, or by creating a target container (3-Phase) to accelerate the Snapclone creation. Please review the HP Business Copy documentation for more information on this feature.