should i select software compression if the tape drive compression is
already on?
----- Original Message -----
From: "Matt Moody" <mattm AT m-c-s DOT com>
To: "Sen" <discussion.groups AT gmx DOT net>; "Paul Winkeler"
<pwinkeler AT pbnj-solutions DOT com>
Cc: <veritas-bu AT mailman.eng.auburn DOT edu>
Sent: Tuesday, May 06, 2003 2:09 AM
Subject: RE: [Veritas-bu] number of tapes
> You can select compression within the backup policy. Just remember, this
> will take additional CPU cycles on the client side and may not raise your
> compression level any further than what the drive can do. Your best bet
> would be to send the data to the tape drive as fast as possible and allow
> the drive to compress it. To determine if software compression will help,
> create a directory with a set amount of data in it, back it up without
> software compression, then try again with it.
>
> Tuning is a crap-shoot in some cases....
>
> Matthew Moody
> MCSI
>
> -----Original Message-----
> From: veritas-bu-admin AT mailman.eng.auburn DOT edu
> [mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu]On Behalf Of Sen
> Sent: Monday, May 05, 2003 10:21 AM
> To: Paul Winkeler
> Cc: veritas-bu AT mailman.eng.auburn DOT edu
> Subject: Re: [Veritas-bu] number of tapes
>
>
> how do i configure NBU to compress the data that it is going to backup?
>
> ----- Original Message -----
> From: "Paul Winkeler" <pwinkeler AT pbnj-solutions DOT com>
> To: "'Sen'" <discussion.groups AT gmx DOT net>
> Cc: <veritas-bu AT mailman.eng.auburn DOT edu>
> Sent: Monday, May 05, 2003 7:21 PM
> Subject: RE: [Veritas-bu] number of tapes
>
>
> Sen
>
> You cannot set the ratio (wish that you could though!) You can control
> compression on a yes/no basis by configuring your OS appropriately but
after
> that compression is as good as the source data will let it be.
>
> Why would you not compress?
>
> PaulW
>
> www.pbnj-solutions.com IT Solutions That Stick
> (216) 533-5708
>
>
> > -----Original Message-----
> > From: veritas-bu-admin AT mailman.eng.auburn DOT edu
> > [mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu] On Behalf Of Sen
> > Sent: Monday, May 05, 2003 6:50 AM
> > To: Matt Moody
> > Cc: netbackup-l; nbu-lserv; veritas-bu AT mailman.eng.auburn DOT edu
> > Subject: Re: [Veritas-bu] number of tapes
> >
> >
> > how do i set the Compression ratio ??
> >
> > ----- Original Message -----
> > From: "Matt Moody" <mattm AT m-c-s DOT com>
> > To: "Sen" <discussion.groups AT gmx DOT net>
> > Sent: Sunday, May 04, 2003 3:35 PM
> > Subject: RE: [Veritas-bu] number of tapes
> >
> >
> > > DLT8k drive assuming non-compressed will require 4 tapes for the
> > > backup. Compressed 2:1 will require 2 tapes.
> > >
> > > ASCII data (text) is highly compressable whereas .pdf's and
> > some image
> > types
> > > are not very compressable. Assume 3 tapes, expect less required.
> > >
> > > Matthew Moody
> > > MCSI
> > >
> > > -----Original Message-----
> > > From: veritas-bu-admin AT mailman.eng.auburn DOT edu
> > > [mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu]On Behalf Of Sen
> > > Sent: Sunday, May 04, 2003 1:07 AM
> > > To: Matt Moody; netbackup-l; nbu-lserv;
> > > veritas-bu AT mailman.eng.auburn DOT edu
> > > Subject: Re: [Veritas-bu] number of tapes
> > >
> > >
> > > i am using DLT 40/80
> > > how do i know the estimated data compression?
> > > its a 1 time backup, keep for 1 month
> > >
> > > ----- Original Message -----
> > > From: "Matt Moody" <mattm AT m-c-s DOT com>
> > > To: "Sen" <discussion.groups AT gmx DOT net>; "netbackup-l"
> > > <netbackup-l AT yahoogroups DOT com>; "nbu-lserv"
> > > <nbu-lserv AT dsihost-srv01 DOT com>; <veritas-bu AT mailman.eng.auburn
> > > DOT edu>
> > > Sent: Sunday, May 04, 2003 2:00 PM
> > > Subject: RE: [Veritas-bu] number of tapes
> > >
> > >
> > > > What tape drives will you be using? How much estimated data
> > compression?
> > > > Are you talking a one-time backup or a backup rotation. If
> > > > rotation,
> > how
> > > > long will you be keeping the data?
> > > >
> > > > Matthew Moody
> > > > MCSI
> > > >
> > > >
> > > >
> > > > -----Original Message-----
> > > > From: veritas-bu-admin AT mailman.eng.auburn DOT edu
> > > > [mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu]On Behalf Of Sen
> > > > Sent: Saturday, May 03, 2003 11:34 PM
> > > > To: netbackup-l; nbu-lserv; veritas-bu AT mailman.eng.auburn DOT edu
> > > > Subject: [Veritas-bu] number of tapes
> > > >
> > > >
> > > > Hi,
> > > > how many backup tapes do you think is required for 150GB of data?
> > > >
> > > > Thanks
> > > >
> > > > _______________________________________________
> > > > Veritas-bu maillist - Veritas-bu AT mailman.eng.auburn DOT edu
> > > > http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
> > > >
> > > >
> > > >
> > >
> > >
> > > _______________________________________________
> > > Veritas-bu maillist - Veritas-bu AT mailman.eng.auburn DOT edu
> > > http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
> > >
> > >
> > >
> >
> >
> > _______________________________________________
> > Veritas-bu maillist - Veritas-bu AT mailman.eng.auburn DOT edu
> > http://mailman.eng.auburn.edu/mailman/listinfo> /veritas-bu
> >
>
>
>
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