You're lucky your environment is as large as it is.

In my experience, the larger the environment, the better the success
rate.

Large environments tend to have more tape drives, more robots, and more
budget.
Hence you lose one out of 50 tape drives, you're still likely to have
better than 99% success.
In an environment with 10 drives, you lose one drive, you could lose
5-10%, depending on how thin your overhead is.

I've supported Netbackup environments with 100 to 2500 backup jobs.
10 failures daily, out of 2500 wasn't uncommon.
That's only about 1/2 of a percent.
You could lose an entire media server and still have over 95% success on
a given night.

In an environment with 100 clients, 2-4 failures is not
uncommon......that's a much bigger hit.
Lose a media server early in your backup window an you could have 0%
success on a given night.
Not to mention, the smaller environments usually have less strict change
control, which means clients are being patched, upgraded, have untested
software installed, have different NIC drivers, etc, etc.

That being said, I'm personally very uncomfortable with backup success
rates < 98%.

Paul


-- 


> -----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 Randy Samora
> Sent: January 4, 2008 8:15 AM
> To: bobbyrjw AT comcast DOT net; VERITAS-BU AT mailman.eng.auburn DOT edu
> Subject: Re: [Veritas-bu] Enterprise Backup Success Rate (Non 
> Technical)
> 
> 
> 700+ Windows clients, 2 Masters, 21 Media/SAN Media servers . 
> . .  if my
> success rate falls below 99%, I lose my quarterly bonus.
> 
====================================================================================

La version française suit le texte anglais.

------------------------------------------------------------------------------------

This email may contain privileged and/or confidential information, and the Bank 
of
Canada does not waive any related rights. Any distribution, use, or copying of 
this
email or the information it contains by other than the intended recipient is
unauthorized. If you received this email in error please delete it immediately 
from
your system and notify the sender promptly by email that you have done so. 

------------------------------------------------------------------------------------

Le présent courriel peut contenir de l'information privilégiée ou 
confidentielle.
La Banque du Canada ne renonce pas aux droits qui s'y rapportent. Toute 
diffusion,
utilisation ou copie de ce courriel ou des renseignements qu'il contient par une
personne autre que le ou les destinataires désignés est interdite. Si vous 
recevez
ce courriel par erreur, veuillez le supprimer immédiatement et envoyer sans 
délai à
l'expéditeur un message électronique pour l'aviser que vous avez éliminé de 
votre
ordinateur toute copie du courriel reçu.

_______________________________________________
Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu