When you start a volume level NDMP backup, Data ONTAP takes a snapshot, does its backup from that snapshot, then deletes that snapshot.  If the data is basically static at the time you wish to perform your backup then you could take your named snapshot for faster recovery purposes and immediately thereafter start the volume level NDMP backup - assuming you have available destination devices.  Otherwise, what you have described will likely give the best performance.

On Wed, May 9, 2012 at 2:33 PM, John Stoffel <john.stoffel@taec.toshiba.com> wrote:

Bill> Even if it is possible, I would recommend against it.
Bill> Performance of an NDMP backup from a named snapshot is
Bill> significantly slower than a volume level NDMP backup.

Blech, not good to hear.

Bill> Are you performing your backup directly from your source volume
Bill> or a snapvault secondary volume?

Ideally, directly from the source volumes, plural.  I'm going to need
to backup the volumes from a snapshot time that's as close as possible
to the same time, then I can take my time doing the actual NDMP to
tape of the data.

So it's looking like my best plan would be to just do:

  foreach v (data_a data_b data_c)
    snap create $v flexclone_backup
    vol clone create ${v}_clone_bkp -s none -b ${v} flexclone_backup
 done

then backup my new data_a_clone_bkup... volumes via NDMP.

John


Bill> On Wed, May 9, 2012 at 1:53 PM, John Stoffel
Bill> <john.stoffel@taec.toshiba.com>wrote:

>>
>> Guys,
>>
>> Anyone know if it's possible do an NDMP backup (using CommVault) of a
>> *named* snapshot?  Basically I need to snapshot two or more volumes at
>> the same time (I can do this in a pre-script) and then let the
>> snapshots be backed up.
>>
>> I guess I could be silly and just create a flex clone volumes and then
>> back those volumes up instead, which would get rid of the issue, but
>> would complicate things a bit more.
>>
>> Thanks,
>> John
>> John Stoffel - Senior Staff Systems Administrator - System LSI Group
>> Toshiba America Electronic Components, Inc. - http://www.toshiba.com/taec
>> john.stoffel@taec.toshiba.com - 508-486-1087
>> _______________________________________________
>> Toasters mailing list
>> Toasters@teaparty.net
>> http://www.teaparty.net/mailman/listinfo/toasters
>>