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Re: large scale (audio) file I/O on OS X : help or insight requested
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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: Hamilton Feltman <email@hidden>
  • Date: Wed, 11 Mar 2015 20:57:31 -0700

> On Mar 11, 2015, at 8:26 PM, Paul Davis <email@hidden> wrote:
>
> The math all looks good. Unfortunately, Robin's test is not indicative of the correct use case. I suspect most people would be OK with the idea that you can only handle about 50 tracks on an external USB2 drive. The harder results to explain come from internal drives. I will definitely get my own mac mini with a spinner inside running tomorrow and re-run the test there with your additional line, and then redo the math you just did above.

Interested to hear the results, more data points.

> We know by existence proof (aka Logic) that the system can handle 128 or more tracks.

Yep, the tests you posted confirm it’s possible. Just double your buffer size from 65536 to 131072. Half the number of seeks, and track count goes from 49 to 100.


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References: 
 >Re: large scale (audio) file I/O on OS X : help or insight requested (From: Hamilton Feltman <email@hidden>)
 >Re: large scale (audio) file I/O on OS X : help or insight requested (From: Paul Davis <email@hidden>)
 >Re: large scale (audio) file I/O on OS X : help or insight requested (From: Hamilton Feltman <email@hidden>)
 >Re: large scale (audio) file I/O on OS X : help or insight requested (From: Paul Davis <email@hidden>)
 >Re: large scale (audio) file I/O on OS X : help or insight requested (From: Hamilton Feltman <email@hidden>)
 >Re: large scale (audio) file I/O on OS X : help or insight requested (From: Paul Davis <email@hidden>)
 >Re: large scale (audio) file I/O on OS X : help or insight requested (From: Hamilton Feltman <email@hidden>)
 >Re: large scale (audio) file I/O on OS X : help or insight requested (From: Paul Davis <email@hidden>)
 >Re: large scale (audio) file I/O on OS X : help or insight requested (From: Hamilton Feltman <email@hidden>)
 >Re: large scale (audio) file I/O on OS X : help or insight requested (From: Paul Davis <email@hidden>)

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