Does chunk size affect the read performance of a Linux md software RAID1 array?

Posted by OldWolf on Super User See other posts from Super User or by OldWolf
Published on 2011-08-31T18:20:04Z Indexed on 2012/04/11 17:33 UTC
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Filed under:

linux

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Performance

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raid

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software-raid

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benchmarking

This came up in relation to this question on determining chunk size of an existing RAID array.

The general consensus seems to be that chunk size does not apply to RAID1 as it is not striped. On the other hand, the Linux RAID Wiki claims that it will have an affect on read performance. However, I cannot find any benchmarks testing/proving that. Can anyone point to conclusive documentation that it either does or does not affect read performance?

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