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Well, that must be a special case. I only know of raw-disk access. Used it for a while back in the 80s for performance on database servers.

But whether by raw-disk or other means, does this piano software bypass the cache? And if so, why would it? You play the same notes on the piano again and again, so you need the same data repeatedly. The disk cache is a fine way to accomplish that.

If the software bypasses the cache, it would have to implement its own caching. Why invent what's already there?

MacMacMac: As I said, on Windows the samples are read through the file system cache - I have proved it IMHO. Chances are it's the same situation on the Mac, but we don't know for sure yet. If it DOES, then to re-iterate my original point: it seems plausible that if Kontakt has caused the file cache to grow appreciably, and then something (another app, or even Kontakt itself) needs to allocate some memory, rather than page out memory that is already in use, it would probably use some memory from the file cache instead, which would cause no disk activity at all. (until of course the sample data that was in those pages of memory is needed again)

I agree that it is more likely than not that the file cache is used for Kontakt on the Mac.

Greg.

(and to prove that files can be accessed without the cache on Unixes, you could try the fio file system exerciser. See the "direct=[true|false]" flag. I have tried this on Ubuntu. )

Greg.

Hi,
I am running Vintage D 1.2 on Kontakt 5 full, my system is an Intel Quad Core Q9400 2.66Ghz 8GB ram winx64 with Creative Audigy 4 pro, asio 24/96, latency 7.0 mseg, buffer 672 samples, pre-load 240KB. My keyboard Yamaha S90xs and CME GPP-3 tri pedal.On Kontakt 4 I did not have drop out but, with Kontakt 5 if I enable repedalling on Vintage D, cpu load increases and then drop out, maybe,it is too much information midi of the continuos sustain pedal.I have run latency check and my system is enabled, then, what is the problem?