Re: [Veritas-bu] Sizing experiences ?

Michael
But the spec you have stated below (in your post) is very reasonable. I
cant recall how many clients you are intending to backup, but all I am
trying to put across is to invest the money now for the growth of
NetBackup. if you can goto 8GB great! anymore can be a bonus (for future
growth).

for example, if you have 50 client machines, then a Master server with a
spec you states shoudl be able to handle this, but if any of these
contain LARGE amounts of data (ie: TB's or you need FAST backups and
restores), consider SAN Media Servers, and SSO sharing the drives.

BTW, LTO3 drives with 8 are fine, as I have seen that spec and works
well. Also, alot will tend to rely on the throughput (I think as Ed
mentioned too).

Is there a budget you have to stick to? Or is it the company simply
having a lack of understanding, and need to see fancy power point
presentations with nice graphics to make them decide how and where to
invest the money?

Simon 

-----Original Message-----
From: Michael Graff Andersen [mailto:mian71 AT gmail DOT com] 
Sent: Friday, March 28, 2008 8:36 AM
To: WEAVER, Simon (external)
Cc: Ed Wilts; veritas-bu
Subject: Re: [Veritas-bu] Sizing experiences ?

Yes, but the managemnet want to see some numbers/reasons for the choosen
hardware other than it is big & fast

2008/3/28, WEAVER, Simon (external) <simon.weaver AT astrium.eads DOT net>:
>
> Mike
> From my view, 8GB is the bare min.... the more the better. The faster 
> the CPU or CPU's the better... the faster and bigger the disks are
,....
> even better :-)
>
> Simon
>
> -----Original Message-----
> From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
> [mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of 
> Michael Graff Andersen
> Sent: Wednesday, March 26, 2008 5:49 PM
> To: Ed Wilts
> Cc: veritas-bu
> Subject: Re: [Veritas-bu] Sizing experiences ?
>
> How do you arrive at 16 GB memory ?
>
> Regards
> Michael
>
> 2008/3/26, Ed Wilts <ewilts AT ewilts DOT org>:
> > You didn't specify the OS either.  You're going to need some serious

> > staging units since you have 400MB of theoretical bandwidth in and 
> > about twice that out to tape.  You either have too many tape drives 
> > or
>
> > they're going to be underutilized.
> >
> > No matter what OS, that memory seems awfully tight.  I wouldn't 
> > touch that config with under 16GB of memory.  Instead of 8 LTO-3 
> > drives on a
>
> > single master/media server, you should probably split that up into 
> > separate master and media servers.
> >
> > Do the I/O calculations very, very carefully.  You're probably not 
> > going to be able to pull that config off with any Windows server 
> > I've seen - you'll starve those tape drives since you likely won't 
> > even have enough HBA bandwidth to drive them.  You're far better off

> > driving 4 LTO-3 drives at full speed than 8 drives at a slow,
> shoe-shining speed.
> >
> > What kills most environments is not CPU but I/O.  Don't just assume 
> > that your disk I/O is adequate - we see destaging performance 
> > plummet when we write to the same disk at the same time.
> >
> >    .../Ed
> >
> >
> > On Wed, Mar 26, 2008 at 11:06 AM, Michael Graff Andersen 
> > <mian71 AT gmail DOT com>
> > wrote:
> > >
> > > Oops, didn't write that the master/media server will have 4x 1 
> > > Gbit NICs & 8x LT03 tape drives. Using the document I arrived at 8

> > > CPUs &
> > > 4.6 GB RAM
> > >
> > > Trying to get a server that can handle the NICs & tape drive at 
> > > full
>
> > > tilt & peoples experiences with using this document or other 
> > > methods
>
> > > of sizing
> > >
> > > Regards
> > > Michael
> > >
> > > 2008/3/26, Ed Wilts <ewilts AT ewilts DOT org>:
> > >
> > >
> > >
> > > > On Wed, Mar 26, 2008 at 10:26 AM, Michael Graff Andersen
> > <mian71 AT gmail DOT com>
> > > > wrote:
> > > >
> > > > > We are about to replace our backup server and I have used the 
> > > > > Backup Planning and Performance Tuning Guide for 6.0 to size 
> > > > > our
>
> > > > > new server
> > > > >
> > > > > Our server people think the sizing is wrong, more specifically

> > > > > that it gives to many CPUs
> > > > >
> > > > > What are you experience regarding sizing ?
> > > >
> > > > Rule #1.  There's no such thing as "too many CPUs or too much
> memory".
> > > > Rule #2.  See Rule #1
> > > > Rule #3.  Is your storage growing?  If it is, see rule #1.
> > > >
> > > > In general, the master server needs lots of memory and cpu and 
> > > > the
> media
> > > > servers need less memory but lots of I/O bandwidth.   All of
them
> need
> > > > plenty of disk space for logs - 20-50GB at a minimum and in a 
> > > > busy
>
> > > > environment while troubleshooting issues, 100GB of logs is not 
> > > > unheard
> > of.
> > > > Without significantly more details on what exactly you're trying

> > > > to accomplish and what config you came up with, we're not going 
> > > > to
>
> > > > be able
> > to
> > > > get more specific than that.
> > > >
> > > >    .../Ed
> > > >
> > > > --
> > > > Ed Wilts, Mounds View, MN, USA
> > > > mailto:ewilts AT ewilts DOT org
> > >
> > >
> > >
> > > _______________________________________________
> > > Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu 
> > > http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
> > >
> >
> >
> >
> > --
> > Ed Wilts, Mounds View, MN, USA
> > mailto:ewilts AT ewilts DOT org
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