OK…here’s the numbers:
No software encryption – 60 MB per
sec per tape drive
With software encryption – 6 MB per
sec per tape drive
CPU load with 128 bit encryption – (normal
system load is 0.89%) to 20.83% load average
Load average went from 20.83% to 28.97%
when switched from 128 bit to 256 bit encryption.
There is a tad bit of “lag time”
when software encryption is turned on and used during backup.
Thank You,
Dennis Peacock
EBCA
Acxiom Corporation
501-342-6232 (office)
From: Peacock Dennis -
dpeaco
Sent: Thursday, December 11, 2008
12:02 PM
To: Peacock Dennis - dpeaco;
Jeffery Price; veritas-bu AT mailman.eng.auburn DOT edu
Subject: RE: [Veritas-bu]
Encryption - LTO-4 or Media Server
OK….hang on…I’m
researching my email string from our testing.
I believe it’s more like 60 MB/Sec
without s/w encrypt and 6 MB/Sec With S/W encrypt.
I’ll get the real numbers for you
shortly.
Thank You,
Dennis Peacock
EBCA
Acxiom Corporation
501-342-6232 (office)
From:
veritas-bu-bounces AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Peacock Dennis - dpeaco
Sent: Thursday, December 11, 2008
11:43 AM
To: Jeffery Price;
veritas-bu AT mailman.eng.auburn DOT edu
Subject: Re: [Veritas-bu]
Encryption - LTO-4 or Media Server
From 600 MB/Sec per tape drive to 6 MB/Sec
per tape drive. How’s that for a performance hit?? J
Thank You,
Dennis Peacock
EBCA
Acxiom Corporation
501-342-6232 (office)
From:
veritas-bu-bounces AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Jeffery Price
Sent: Thursday, December 11, 2008
11:38 AM
To:
veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] Encryption -
LTO-4 or Media Server
Hi All,
We are considering NBU Media Server encryption rather then
LTO-4 encryption. I know there is potentially a performance hit at the media
server, but also a potential performance increase due to multiple streams being
converted to a single, larger, encrypted stream being written to tape.
We are NBU 6.5.2a Solaris 9 master, another Solaris 9 media,
stretched metro SAN, LTO-2 drives (moving to LTO-4), EMC CDL700 (moving to
DL3D). Hardware for both master and media is SUN V440 4CPU@1062MHz
8GB RAM. Also use VCB proxy host (W2K3), and remote media servers
(windows) for Puredisk.
Just wanted to see what others are doing, and if anyone has
any good/bad experiences with either one.
Thanks.
--Jeff
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