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[Veritas-bu] Re: [BackupScripts-L] restoration time

2003-04-22 05:08:00
Subject: [Veritas-bu] Re: [BackupScripts-L] restoration time
From: Sen" <discussion.groups AT gmx DOT net (Sen)
Date: Tue, 22 Apr 2003 17:08:00 +0800 
i can actually manually set NBU to have more than 1 stream per drive.
how do i go about improving on the backup time?

----- Original Message ----- 
From: "Shafto, Eric" <Eric.Shafto AT DrKW DOT com>
To: "'Sen'" <discussion.groups AT gmx DOT net>
Sent: Tuesday, April 22, 2003 12:56 AM
Subject: RE: [Veritas-bu] Re: [BackupScripts-L] restoration time


> Then it doesn't matter how you set streaming. For better or worse, NBU
only
> starts one stream per drive to be backed up (sorry I wasn't clearer in my
> question -- yes, it was disk drives I was referring to).
>
> So you're going to get one stream no matter what you do. Now, if you had
C:,
> D:, and E: drives to be backed up and you set multistreaming to 3, you'd
> have three streams going at once.
>
> -----Original Message-----
> From: Sen [mailto:discussion.groups AT gmx DOT net]
> Sent: Monday, April 21, 2003 11:38 AM
> To: Shafto, Eric
> Cc: netbackup-l; nbu-lserv; veritas-bu AT mailman.eng.auburn DOT edu
> Subject: Re: [Veritas-bu] Re: [BackupScripts-L] restoration time
>
>
> P1000 (3 tape drives) connected to the veritas master
> 1x 150GB drive from client to be backup.
>
> ----- Original Message ----- 
> From: "Shafto, Eric" <Eric.Shafto AT DrKW DOT com>
> To: "'Sen'" <discussion.groups AT gmx DOT net>
> Sent: Monday, April 21, 2003 3:03 AM
> Subject: RE: [Veritas-bu] Re: [BackupScripts-L] restoration time
>
>
> > How many drives on the W2K server?
> >
> > -----Original Message-----
> > From: Sen [mailto:discussion.groups AT gmx DOT net]
> > Sent: Saturday, April 19, 2003 1:28 AM
> > To: Steve Dvorak; Christopher Baughman
> > Cc: netbackup-l; nbu-lserv; veritas-bu AT mailman.eng.auburn DOT edu
> > Subject: [Veritas-bu] 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
> > > >
> > > >
> > > >
> > >
> > >
> >
> >
> > _______________________________________________
> > Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
> > http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
> >
> >
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>
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