[Cialug] Disk Performance and Measurement

[Nathan C. Smith]

Those are both good questions.  My first instinct would be that a hardware based disk system like the Compaq and the 3WARE would degrade less under load, but the AoE is so elegantly simple it is hard to imagine it has more than a slight impact on the system in a heavy load.

Right now these systems are  mostly pieces of my backup solution and so those questions are not as relevant to my application as they would be to something like a file, web, or a database server.  All these speeds are more-than-acceptable to me right now because they far outpace the speed that my backup software can copy and process the files on my systems.  

-Nate



From: cialug-bounces at cialug.org [mailto:cialug-bounces at cialug.org] On Behalf Of Matthew Nuzum
Sent: Friday, October 30, 2009 4:32 PM
To: Central Iowa Linux Users Group
Subject: Re: [Cialug] Disk Performance and Measurement

On Fri, Oct 30, 2009 at 4:11 PM, Nathan C. Smith <nathan.smith at ipmvs.com> wrote:
What is acceptable performance?  I realize that is a really open-ended question because it depends on the application.  None of my machines are serving big databases, mostly just shuffling files.  I did a straight PATA disk and got 132 MB in  3.00 seconds =  43.99 MB/sec so I'm thinking anything better than that is an improvement.  But I'd like to learn about the experiences of others.

That's pretty interesting stuff. First question that comes to my mind is, "what happens when there are concurrent users?"

Second question is, "How does this affect system load?" 

-- 
Matthew Nuzum
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