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I/O performance and stripe_cache_size, contd.

There are some anomalies in the previous graphs, notably the incongruent results for stripe cache sizes of 768 and 32768. So I ran some more tests with a smoother range of  I/O blocksize.

NB : Each variable was tested three times, with all caches synced and flushed before and after. The average of those three tests were used to plot the data points on the graphs.

Caveat : I also reduced the test file size to 650MB (I know, I know, very bad practice to change multiple variables whilst testing).

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  1. Scott Schneider
    September 23, 2010 at 06:29

    I enjoyed looking at your graphs and am hoping to tweak my new setup. Could you please take a look at my post in the QNAP forums and offer any advice?
    Thanks!

    http://forum.qnap.com/viewtopic.php?f=25&t=34827

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