Re: large scale (audio) file I/O on OS X : help or insight requested
Re: large scale (audio) file I/O on OS X : help or insight requested
- Subject: Re: large scale (audio) file I/O on OS X : help or insight requested
- From: Ross Bencina <email@hidden>
- Date: Thu, 05 Mar 2015 22:11:11 +1100
On 5/03/2015 5:45 PM, Hamilton Feltman wrote:
It’s completely related to block size. Running this test with large
block sizes, I could reach the maximum sequential read speed of the
drive.
The results on OSX might be related to block size. However according to
tests I've seen, the optimal block size for spinning disks (in general,
not OS-specific) is somewhere between 64k and 256k. I can dig out the
paper if anyone is interested.
It would be interesting to run the Windows test with all caching
disabled (requires page-aligning buffers, using Windows APIs etc.)
Another way to vary the test would be to generate a random layout of
blocks within one file to simulate streaming from many files. (i.e.
simulate a file system within a file).
Ross.
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