[Mimedefang] ramdisks on Linux

[Jon R. Kibler]

Mark Wiater wrote:
> 
> Thanks John.
> 
> When you were there, did you measure performance when using a command
> line scanner? Do you know if the performance benefit warrants the three
> issues?
> 
> 1. could be worth the effort depending on your findings above?
> 
> 2. I'm using both trend command line and mcafee command line,
> 
> 3. I've already got a script pulling the sigs from a central machine,
> shouldn't be a problem to drop them on the ramdisk too.
> 
> Really curious about your findings,
> 
> Thanks
> 
> Mark
> 

Mark,

We found that for uvscan, using RAMDISK cut the scan time by anywhere 
from 1/2 to 2/3 the scan time of using sigs on HDD. No difference was
found for clamd.

The tests were run on a Sparc w/ 2GB RAM, with a LA around 3, and a
context change rate around 3K to 4K/sec, and a page rate of next to 
zero. I suspect that if you try this on a system with any degree of 
paging, that your results will not be as good.

Hope this helps!

Jon
-- 
Jon R. Kibler
Chief Technical Officer
A.S.E.T., Inc.
Charleston, SC  USA
(843) 849-8214




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