On Mon, Feb 10, 2003 at 11:24:07AM -0500, Teresa Biehler wrote:
>
> o Can you describe in more detail what you are doing for snapshotting?

It's a feature built into the Celerra and (I think) the clairiion line.
Basically, you make a read-only copy of the data without copying it.  Things
that change on the "real" data are written to different disk blocks
transparently.  If the user wants data that was there yesterday, we look
at /mount/snapshots/volume/yesterday and copy the data from there rather
than reading from tape.

> o What version of Networker are you using?
6.1.2 or something like that.

> o Do you know if other Networker features are expected to be included in
> later releases of the NDMP client?

I do not know.  They're probably waiting for the NDMP version 5 spec to be
finalized (www.ndmp.org) which supports these sorts of operations.

--Joe

> Joe Moore wrote:
> >
> > On Mon, Feb 10, 2003 at 09:04:20AM -0500, Teresa Biehler wrote:
> > > o Is anyone using NDMP to back up an EMC NAS?  Did NDMP work as
> > > advertized?  Did you have any problems?  If so, how were they resolved?
> > > We've got a Clariion/Celerra environment that we plan on backing up with
> > > NDMP.
> >
> > In short: Yes.  Yes.  Yes.  We told the customer that the restores may
> > be a lot of work.  They turned on snapshotting.
> >
> > A bit more:
> > We're backing up an EMC Celerra.  NDMP worked exactly as advertised, as
> > long as you notice in the advertisements which Networker features don't
> > work with NDMP.  Such as tape scanning (rebuilding index from tape),
> > staging, cloning, restoring from the middle of a saveset without reading
> > in the whole thing (this is fixed now).
> >
> > We had a few problems.  The biggest one was that NDMP doesn't seem to
> > support accurate reporting of library operations.  This showed itself
> > when we had the library (robot) attached to the celerra, and tried to
> > load a tape.  The library would start the "tape load", report that it
> > was complete, and Networker would immediately try to read from the drive.
> > Well before the drive was ready.  We had to set the "load sleep" value to
> > 90 seconds, which means inventorying the jukebox was incredibly slow.
> >
> > --Joe
> >
> > --
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--
Note: To sign off this list, send a "signoff networker" command via email
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