On Wed, Apr 19, 2006 at 05:31:50PM -0400, Matt London wrote: > The problem comes when trying to capture video using Adobe > Premiere 6.5 and write straight to the share - we get a > *lot* of dropped frames (somewhere in the region of 25%+). > Yet the same job to an Adaptec Snap server (which is samba > on adaptec's guardianOS) works fine, even through it can > only sustain 10MB/s.
There are a lot of variables here that need quite thorough testing. Does Adobe Premiere write a single big file? If it does, what is the write performance that you get with for example xcopy or a copy by explorer. This gives you some indication, but it is by no means the full story. Next step in analyzing this is watching the *exact* pattern of write calls that Adobe Premiere uses and look for latencies there. Even the network card drivers can have a big influence on a workload like that, also fibre channel is not always the silver bullet that people believe it is. FC drivers can also introduce stalls that influence streaming performance. Lots of diagnosis work for you I'm afraid. Volker
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