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RAID Performance Matrix

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by msullivan

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I am looking for detailed performance information on the difference between various raid implementations.

For example, in I/O per second how much faster is RAID 0+1 than RAID 5 in terms of reads and writes? What impact does multiple controllers have on the equation? What are the implications of block size?

Any white papers / web sites would be helpful

Thanks
Mike

7 replies

by ewing bettles

One of the better in-depth white papers I've found that directly relates to Microsoft's NT hardware/software performance is available through Technet - "BackOffice Server 4.5 on Windows 2000 Server Performance Characterization". The paper is not dedicated to RAID performance, but does offer some detailed insight regarding RAID stripe sizes compared with NTFS allocation sizes.

There is a very good article on RAID optimization from a UNIX view to be found at:

http://www.unixinsider.com/swol-09-1997/swol-09-raid.html

(please verify that no spaces have crept into the above link)

Also, I check the following link occasionally:

http://www.acnc.com/benchmarks.html

Currently, there is only I/O benchmarking tools available there (some quite good), but they promise to someday post results as well.

I know this doesn't cover all of what you seek, but hope that some of it is helpful.

-Ewing

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