How do you measure the transfer rate of a network ?

[Yuval Dimnik]

Hi Francois.

Why don’t you contact Exanet support, tell them you have performance issue on client X, and have them analyse the problem for you with no charge?

Yuval

[Francois Xavier]

yes the Exanet people are reading us, good reactivity

I am not saying I have problems to pass video across the networtk because this is not my subject, for now. I am just talking about transfer finished rendered QuickTime files, because that’s the workflow I am confronted now.

Anyway if that network seemed slow to me I don’t see Exanet itself as a ” culprit”, maybe not enough ports…

now that you people have give some clearance, I am gonna talk to the central engineers …

as for the Aja test, even with Distant Volumes enabled in preferences it doesn’t see the dpshare volume on the desk. Even if I toss the test app on that volume and launch it from there… Maybe it doesn’t work on that configuration, maybe it’s an authorization problem? I shall try again

Documentary Director & Editor
Paris /France

[Chris Blair]

Blackmagic also has a speed test utility. Just go to their website and download the Intensity drivers (Mac or PC). You’ll get a dialogue asking you to give them your name, serial number etc. They make it look like it’s required. It’s not. Just skip it and hit “download.” Then install. It won’t install the drivers if you don’t have the hardware, but it will install the Blackmagic codecs, a nice little media player called Media Express, and the Blackmagic speed test utlity. We use it to test the speed of our Apace vStor across 4 edit systems. Works great and is very accurate.

By the way, we consistently get about 75-80MB/sec read and 85-95MB/write speeds on our systems. They have jumbo frames enabled and the MTU is set to 9100 on each system and the vSTor. Interestingly, Apace doesn’t enable this by default…yet we edited with this system without problems for several months until the drives got about half full. Then one capture station started dropping frames when trying to capture uncompressed SD. We enabled jumbo frames and were back in business.

Hope that helps

Chris Blair
Magnetic Image, Inc.
Evansville, IN
http://www.videomi.com

[Francois Xavier]

thank you all for all those infos

(I found out that I couldn’t test the distant volume because it’s first level is protected against any writing)

Documentary Director & Editor
Paris /France