but if i turned off MultiStreaming and set MPX to 2, the backup will take
13hrs to run..
any help to reduce the backup time?
----- Original Message -----
From: "Steve Dvorak" <sdvorak AT veritas DOT com>
To: "'Sen'" <discussion.groups AT gmx DOT net>; "Christopher Baughman"
<baughmac AT overture DOT com>
Cc: "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: Monday, April 21, 2003 11:02 AM
Subject: RE: [BackupScripts-L] restoration time
> If you only have one RAID set, than make sure that MultiStreaming is
turned
> off for that client. Also, as I stated before, use 2-3 streams for
> Multiplexing(MPX). If you can meet your backup window without MPX then
set
> it to 1.
>
> Steve Dvorak
>
> Are you ready for VERITAS NetBackup? Test you knowledge on our NetBackup
> Self-Assessments:
> http://www.veritas.com/education/quicktips/Assessment.jhtml
>
>
> -----Original Message-----
> From: Sen [mailto:discussion.groups AT gmx DOT net]
> Sent: Friday, April 18, 2003 10:28 PM
> To: Steve Dvorak; Christopher Baughman
> Cc: netbackup-l; nbu-lserv; veritas-bu AT mailman.eng.auburn DOT edu
> Subject: Re: [BackupScripts-L] restoration time
>
>
> if i am doing a backup of 150GB of data from a single client running
windows
> 2000 server on raid 5 connected to a 3 drives tape library , how should i
> stream the backup?
>
> ----- Original Message -----
> From: "Steve Dvorak" <sdvorak AT veritas DOT com>
> To: "'Sen'" <discussion.groups AT gmx DOT net>; "Christopher Baughman"
> <baughmac AT overture DOT com>
> Cc: "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: Saturday, April 19, 2003 12:39 AM
> Subject: RE: [BackupScripts-L] restoration time
>
>
> > Keep in mind the reason for multiplexing is to get enough data to the
> > tape drive to keep it streaming at maximum speed (average 25GB/hr for
> > DLT
> 8000).
> > This means that if you have fast network pipes, and decent servers,
> > you should be able to achieve that thruput using 2-3 streams. In
> > other words,
> 6
> > is overkill. You need to strike a balance. Here are some documents
> > that should help you.
> >
> > NetBackup for Windows performance tuning:
> > http://seer.support.veritas.com/docs/248373.htm
> >
> > NetBackup for Unix performance tuning:
> > http://seer.support.veritas.com/docs/240733.htm
> >
> >
> > Steve Dvorak
> >
> > Are you ready for VERITAS NetBackup? Test you knowledge on our
> > NetBackup
> > Self-Assessments:
> > http://www.veritas.com/education/quicktips/Assessment.jhtml
> >
> >
> > -----Original Message-----
> > From: Sen [mailto:discussion.groups AT gmx DOT net]
> > Sent: Friday, April 18, 2003 8:22 AM
> > To: Steve Dvorak; Christopher Baughman
> > Cc: netbackup-l; nbu-lserv; veritas-bu AT mailman.eng.auburn DOT edu
> > Subject: Re: [BackupScripts-L] restoration time
> >
> >
> > multiplexing (MPX) is set to 6 during backup to reduce the backup
> > time. i
> am
> > backing up about 100GB of data files. Is there any other option to
> > speed
> up
> > the restoration time other than reducing the MPX no. ??
> >
> >
> > ----- Original Message -----
> > From: "Steve Dvorak" <sdvorak AT veritas DOT com>
> > To: "'Sen'" <discussion.groups AT gmx DOT net>; "Christopher Baughman"
> > <baughmac AT overture DOT com>
> > Cc: "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: Friday, April 18, 2003 10:02 PM
> > Subject: RE: [BackupScripts-L] restoration time
> >
> >
> > > Are you using multiplexing (MPX)? If so what value is it set to?
> > > Multiplexing allows you to have multiple clients backup to a single
> > > tape device, thus driving the device at close to rated speeds, but
> > > it is interleaving data on the tape. I.e. if you have MPX set to
> > > 10, 10 clients would deliver data to the device and essentially
> > > Client1 would have a
> > piece
> > > of data every 10 "blocks". Therefore when doing a restore it would
> > > have
> > to
> > > read Client1 data, skip 9 "blocks", read more Client1 data, skip 9
> > "blocks",
> > > and so forth. This *could* be the reason, if you are using a high
> > > MPX number - recommendation for DLT 8000 drives is 2 to 3 MPX. Other
> > > factors that affect restore time are, how quickly the client can
> > write
> > > data to disk, speed of the network pipe, or even some erroneous bug
> > > somewhere. In general you should be able to restore 12-18GB per
> > > hour. Steve
> > >
> > >
> > > -----Original Message-----
> > > From: Sen [mailto:discussion.groups AT gmx DOT net]
> > > Sent: Thursday, April 17, 2003 7:03 PM
> > > To: Christopher Baughman
> > > Cc: netbackup-l; nbu-lserv; veritas-bu AT mailman.eng.auburn DOT edu
> > > Subject: Re: [BackupScripts-L] restoration time
> > >
> > >
> > > i am using a DLT 40/80, it took me 5+hrs to restore only 3.3GB
> > > of data!
> > > any idea?
> > >
> > >
> > > ----- Original Message -----
> > > From: "Christopher Baughman" <baughmac AT Overture DOT com>
> > > To: "Sen" <discussion.groups AT gmx DOT net>
> > > Sent: Friday, April 18, 2003 12:08 AM
> > > Subject: RE: [BackupScripts-L] restoration time
> > >
> > >
> > > It shouldn't take too long, but that can best be answered based
> > > almost entirely on your configuration. A good starting place,
> > > though, is to take how long it takes to back up that data, and
> > > multiply that by 1.5, or even double it. That is a very loose way
> > > to look at it that gives a fairly
> > close
> > > time range. It is rare that I get a restore time that equals the
> > > backup time.
> > >
> > > -----Original Message-----
> > > From: Sen [mailto:discussion.groups AT gmx DOT net]
> > > Sent: Thursday, April 17, 2003 8:33 AM
> > > To: netbackup-l; nbu-lserv; veritas-bu AT mailman.eng.auburn DOT edu
> > > Subject: [BackupScripts-L] restoration time
> > >
> > >
> > > hi all,
> > > can i have some feedback on how long it takes for you to restore 3
> > > GB of data using netbackup datacenter 3.4 ? thanks
> > >
> > >
> > > _______________________________________________
> > > NBU-LSERV AT datastaff DOT com - Advanced NetBackup Scripting Maillist
> > > http://dsihost-srv01.com/mailman/listinfo/nbu-lserv
> > > Check out the Advanced Scripting Website
> > > http://www.NetBackupCentral.com
> > >
> > >
> > >
> > >
> > > _______________________________________________
> > > NBU-LSERV AT datastaff DOT com - Advanced NetBackup Scripting Maillist
> > > http://dsihost-srv01.com/mailman/listinfo/nbu-lserv
> > > Check out the Advanced Scripting Website
> > > http://www.NetBackupCentral.com
> > >
> > > _______________________________________________
> > > NBU-LSERV AT datastaff DOT com - Advanced NetBackup Scripting Maillist
> > > http://dsihost-srv01.com/mailman/listinfo/nbu-lserv
> > > Check out the Advanced Scripting Website
> > > http://www.NetBackupCentral.com
> > >
> > >
> > >
> >
> >
>
> _______________________________________________
> NBU-LSERV AT datastaff DOT com - Advanced NetBackup Scripting Maillist
> http://dsihost-srv01.com/mailman/listinfo/nbu-lserv
> Check out the Advanced Scripting Website
> http://www.NetBackupCentral.com
>
>
>
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