Re: [Networker] Cloning parallelism
2008-01-23 12:14:50
We use a 4Tb EMC AX150 LUN as a disk device and stage off that just
to solve the parallelism issue (we do 28 sessions). This comes at the
cost of lots of staging.
EAlbert wrote:
After a little whining about single processor programming, some
recommendations from friends (/Wave Hi Stan/Conrad) I have a key word for
you guys...
T2000
I am not a sales guy for anyone, but the T2000 + single processor
programming = ZOOOOM (kind of like the Mazda commercial <insert singing:
zoom-zoom-zoom...>
As far as your backup times...
Turn the parallelism way up... You can process more than you think; but I
recommend you experiment with a lab before live data.
Also, when parallelism goes up your backup time goes waaay down, but your
restore time goes waaay up...
My boss doesn't usually care how long backups take as long as they do not
interfere with production... My boss will squeal like a stuck pig when our
customers start complaining how long their critical restore takes... So pick
your poison carefully...
/signed
NtwrkrSerf
-----Original Message-----
From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] On
Behalf Of Stan Horwitz
Sent: Wednesday, January 23, 2008 9:37 AM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: Re: [Networker] Cloning parallelism
On Jan 23, 2008, at 9:19 AM, Goslin, Paul wrote:
Here Here !
I'm glad to see we are not the only ones who have noticed this lack of
multi-processor support. It's like having a HUMMER with an V8, but
only
3 spark plugs, looks impressive , but don't expect it use all the
power
that's available to it... Or accomplish as much as it could...
We've asked EMC about this, and the only suggestion they made was "try
increasing the server parallelism", which has made no measurable
difference that we can see. Then they closed the case without our
consent without answering our initial question: Why doesn't networker
utilize multiple processors ????
Perhaps if enough customers who desire that capability ask EMC to
imbue NetWorker with multi-processor capability, EMC's product
managers might be convinced that a valid business case exists to
include that feature.
The lack of multiple processor support is a major issue for me. I run
NetWorker 7.4 on Solaris 10. I have several NDMP clients that I back
up using the history feature. When the index data is in the process of
being sorted, it kills the processor on my 32-processor Sun T2000 is
where everything involving NetWorker runs. As a result, I have a fast
server that slows to a craw at least once a week because of
NetWorker's uni-processor limitation.
I would be happy to compile the list of customers who want NetWorker
to utilize multiple processors. I sure am one of them. Feel free to
write to me privately via stan AT temple DOT edu and/or reply to this message
publicly. There are several EMC people subscribed, so if you complain
directly to this list, they will see your emails. What I will do is
wait until next week and submit an RFE on this issue via PowerLink and
I can attach a list of customers who need multi-processor capability
if you speak up.
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--
-- Yaron.
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