Re: [Veritas-bu] Encryption - LTO-4 or Media Server

Here are the results from a test I did back in June 2007, NBU 6.0 I think.

The data set is a mix of windows installers, tar.gz's, and executables.
Total size: 3.2GB - LTO1 drive on a SCSI LVD160 card.
Reading from a Vxfs filesystem on Solaris 10, local disks
aes128 encryption and lzrw3 compression.
Sun E220, dual 450MHz with 2GB ram.
Number tape buffers = 16, tape buffer size 256K.

One stream, using the MSEO device without encryption: 18MB/sec
System load was never more than 1.00

One stream,  using the MSEO device WITH encryption:  13MB/sec
System load peaked at 2.5, but remained
 responsive.

The speeds were reported in the BPTM log files and activity monitor.
I know this is a long way from LTO4 or any current hardware, but it demonstrated a nominal performance hit.
It is significantly cheaper than losing corporate financial data.
-Jon

From: Jeffery Price <jeffery.price AT AES DOT com>
To: veritas-bu AT mailman.eng.auburn DOT edu
Sent: Thursday, December 11, 2008 9:37:52 AM
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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