[ale] OT: NDMP

[John C]

USUALLY, the way NDMP works is the back up software tells the NAS that it's
time to backup. The NAS takes a snapshot of whatever's on disk, and then a
background process dumps that data to a directly attached tape drive.
Usually, there is a separate processor that takes care of this, so that
normal disk/network IO isn't affected during backup.

Other vendors might do NDMP a little differently, and that's up to them to
do that.  They might be able to take snapshots of a subnet of data, etc and
then back it up.

NDMP is a protocol, so it can be implemented a little differently by
different vendors and still work.

NetApp was the company that originally came up with it, so check their web
site for more info.


John

On 7/10/07, Greg Freemyer <greg.freemyer at gmail.com> wrote:
>
> All,
>
> I need to understand ndmp and what it is beyond a backup protocal for
> NAS devices.
>
> Anybody know any whitepapers or background sites I can read.
>
> In particular I need to understand if ndmp is used in conjunction with
> a NAS holding an Exchange Server repository and if ndmp is somehow
> smart enough to only send the new emails of the day.  Or in that case
> would it have to do a full backup.
>
> FYI: My client has some NAS servers and we're trying to use a ndmp
> backup spoofer to index the daily e-mails.  A weird concept to me, but
> the manufacturer of the spoofer claims it will work.
>
> Greg
> --
> Greg Freemyer
> The Norcross Group
> Forensics for the 21st Century
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>
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