Re: [Veritas-bu] ESL Poor LAN Performance

2013-11-19 13:44:55
Subject: Re: [Veritas-bu] ESL Poor LAN Performance
From: Simon Weaver <Simon.Weaver AT iscl DOT net>
To: "'Bluejay Adametz'" <bluejay AT fujifilm DOT com>, "VERITAS-BU AT mailman.eng.auburn DOT edu" <VERITAS-BU AT mailman.eng.auburn DOT edu>
Date: Tue, 19 Nov 2013 18:44:43 +0000
The Data is millions upon millions on 2-5kb files.
So from a Network point, it is just about acceptable. It would be a SAN Media 
Server or Client if they paid for it!
The estimate I gave, wasn't even close to the overall capacity.
It is a 1GB Network. But the environment is running flat-out 24 x 7 - There is 
so much going on.
I can change the Multiplexing.... but it will not help much as the data is 
stored in the most unusual structure!

I did want Flash backups, as I tested this before and got much better 
improvement (much!)

-----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 Bluejay 
Sent: 19 November 2013 16:01
To: VERITAS-BU AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu] ESL Poor LAN Performance

> To give you an idea, 20 hours to backup 100GB.
> I cancel the job, revert backup policy to the LTO4 library, same media server 
> and backups of the same capacity done in 2 hours.

Someone check my math, but 100gb in 2 hours, 50gb/hour, 853mb/hour, or 
14mb/sec. I wonder if the LTO4 is able to slow down to match that rate, while 
that knocks the LTO5 out of streaming?

What sort of network connection does this server have? If it's 1gb/sec, it 
should support faster than 14mb/sec; maybe increase your multiplexing?

                                                         - Bluejay Adametz

"It is belief and desire that determine all things."
 - Thea Alexander, in "2150 A.D."


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