matt,
thnx for the suggestions..can u explain in detail..or if u have any procedures
to increase parallelism
rgds,
kurian
Matt Robert wrote:
> This email is to be read subject to the disclaimer below.
>
> Gives you more bandwidth to your backup server so you can increase
> parallelism.
>
> Say you max out the NIC on the backup server with 6 streams going at once,
> if you enable client side compression, (assume 2:1) you can now get 12
> streams onto your tape drives at once.
>
> Cheers,
> Matt
>
>
>
>
> Curtis Preston <cpreston < at > GLASSHOUSE.COM>
> Sent by: EMC NetWorker discussion <NETWORKER < at > LISTSERV.TEMPLE.EDU>
> 26/08/2008 08:51 AM
> Please respond to
> EMC NetWorker discussion <NETWORKER < at > LISTSERV.TEMPLE.EDU>; Please
> respond
> to
> Curtis Preston <cpreston < at > GLASSHOUSE.COM>
> All email is logged and may be reviewed - Refer policy FP105
>
> To
> NETWORKER < at > LISTSERV.TEMPLE.EDU
> cc
>
> Subject
> Re: [Networker] enabling compression
>
>
>
>
>
>
> But now that I think about it, if you're backing up this way, there really
> is NO value in using client compression (the directives with compression),
> (there hardly ever is).
>
> You're not saving any bandwidth, as all the data will still come across
> the network. You're then compressing it with software in NetWorker. This
> takes longer and won't be as efficient than just using the tape drive
> compression.
>
> Why would you want to do it this way?
>
>
> Curtis Preston | VP Data Protection
> GlassHouse Technologies, Inc.
>
> T: +1 760 710 2004 | C: +1 760 419 5838 | F: F: +1 760 710 2009
> cpreston < at > glasshouse.com | www.glasshouse.com
> Infrastructure :: Optimized
>
> -----Original Message-----
> From: EMC NetWorker discussion [mailto:NETWORKER < at > LISTSERV.TEMPLE.EDU]
> On
> Behalf Of kurianv
> Sent: Monday, August 25, 2008 2:58 PM
> To: NETWORKER < at > LISTSERV.TEMPLE.EDU
> Subject: [Networker] enabling compression
>
> hi,
> thanx for the valuable suggestions...but davina how can we force the tape
> drives not to compress if we are using "NT with compressed directives".
>
> thnx,
> kurian
>
>
>
> davina wrote:
>
> > kurianv wrote:
> >
> >
> > > hi,
> > > sorry i did not tell in detail...actually we are using sdlt tape
> > >
> >
> drives of 320 GB capacity
>
> >
> > > And whereas in the case of netapp filer..what we have done is that now
> > >
> >
> we have mapped the drives of filer in a windows server. So now the client
> is windows server. And when the backup is taken the maapped drives of the
> filers are also backed up....
>
> >
> > >
> > > Please can u suggest on the way how we can enable compression in this
> > >
> >
> case..?
>
> >
> > The best compression will come by using the compression of the SDLT
> > drives. If you insist on using software compression you do this by
> > selecting "NT with compression directives" in the client resource. If
> > you do this I suggest that you force the tape drives NOT to compress, as
> >
>
>
> > double compressing negates the effect and sometimes ends up backing up
> > more data than just using hardware or software compression.
> >
> > Software compression is (IMHO) best reserved for those cases where the
> > client is connected to the storage node via a very slow network
> >
> connection.
>
> >
> >
> > via RSS at http://listserv.temple.edu/cgi-bin/wa?RSS&L=NETWORKER
> >
>
>
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