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Multithreaded Read & Write Patterns

The multithreaded tests simulate a situation when there are one to four clients accessing the hard disk at the same time – the clients’ address zones do not overlap. We will discuss diagrams for a request queue of 1 as the most illustrative ones. When the queue is 2 or more requests long, the speed doesn’t depend much on the number of applications. You can also click the following links for the full results:

It’s simple with multithreaded reading: Seagate’s HDDs suffer the most from the addition of new data threads. Western Digital’s HDDs cope somewhat better and the Hitachi 7K2000 is the winner with the lowest performance hit at multiple threads.

The newcomers are all good at multithreaded writing, but the Seagate Barracuda XT on the ICH7 has a sudden performance hit at two data threads but then improves. The Hitachi 7K2000 is slower than the others at three and four threads, though. This may be due to its smaller cache.

 
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