Hi Curtis
Well, IMHO (and the opinion of the many people who use this option) the
advantage is that the 'production' storage nodes and the production SAN
are not burdened with cloning; this is all done internally to the EDL.
Yes, it does put a load on the EDL engine. But SOME system has to take
on the burden, and I'd rather have it be a dedicated backup appliance
than, say, my database server.
As to slowing things down, the EDL engine has finite resources, of
course. So the best practice would be to schedule the cloning to occur
during the [insert wishful thinking here] time when the EDL was not busy
accepting new backups.
Thanks for this dialogue!
tl
-----Original Message-----
From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On
Behalf Of W. Curtis Preston
Sent: Wednesday, March 25, 2009 2:16 AM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: Re: [Networker] Clone from EDL to library
Terry,
I'm honestly trying to figure out how this is better. It's better in
that
you don't need a separate storage node, but how ELSE is it better? He's
still got to figure out how to tell NW to do all this; the queries and
commands are all the same.
And as to it being better... Here's my thought, PLEASE tell me what I
don't
understand. The VTL is still bringing the data into one I/O path and
out
another. In addition to the load this places on the CPU, you add the
load
of the storage node processing. Doesn't this add additional load to the
VTL
and inevitably slow things down?
-----Original Message-----
From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On
Behalf Of Terry Lemons
Sent: Sunday, March 22, 2009 7:38 PM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: Re: [Networker] Clone from EDL to library
Hi
One option you can consider is using the EDL NetWorker embedded storage
node option. This would be an additional purchase, but would allow the
EDL itself to read from the VTL and clone to the physical tape library.
This is better than reading the data back into your storage node and
writing the data to the physical tape library - the embedded storage
node option does all of the cloning work.
tl
-----Original Message-----
From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On
Behalf Of Gordon
Sent: Saturday, March 21, 2009 1:38 AM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: [Networker] Clone from EDL to library
What is the best way to do this?
I have all backup pools run in a VTL and I need 2 clones on real tape
every day, the first copy stay in the same building in a fire proof
safe-deposit box, the second copy is transported daily to another safe
location.
I need to make today a clon of all yesterday savesets twice, each ones
on a diferent clone pool. To do that I make this mminfo query, I like to
know your opinion about this. Thanks!
mminfo -q 'savetime>=yesterday 00:00:00, savetime<=23:59:59 yesterday ,
pool=filesystemW, pool=filesystemP, pool=Default, pool=filesystemL,
!incomplete, !suspect' -r "volume, barcode, volid, ssid, cloneid, name,
client, copies"|awk '{print $4 "/" $5}'|tail +2>ssid.cloneid
nsrclone -S -f ssid.cloneid -b Copy1
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