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Finalcut Pro and XRAID Scrubbing Issue Driving Us MAD !
Hi All – I really hope one of you guys have come across this and well … fixed it and it’s just me going mad!
We are in the process of build a SAN with Xsan and A Xserve and Xraid etc etc. We’re doing this to replace our slower system of gigabit network and server.
But we have run into a problem that existed on our previous Gigabit network…….but now its happening on a direct Fibre connection to the XRAID too !!! ???The problem is to do with scrubbing footage … say i take a DV Tape 9.24Gb in size Play the clip in FCP 5.1 from a SATA internal drive. Works great Scrubbs Fast.
Then you take the same clip and copy it to the XRAID which has two raid sides A and B each 2.2TB and HFS+ and also RAID5 Locally mounted and connected via a apple fibre card to a 5200 sanbox(Switch) and then to the XRAID. ……And it runs like crap ! really slow scrubbing …plays but really slow scrubbing ???
The raid is giving me the results below using IO Gauge … its running ok as far as i can see..copying files is very quick access fine etc … it’s just Final Cut pro …and also ive noticed a change in the speed of scrubbing using Quicktime Player … Normally this is very fluid and quick …but alas using the Xraid its slower. You can tell a big difference.
Has anyone else had this issue ? It was the same performace issue with QT and FCP when we had the normal gigabit lan and i thought it was somthing to do with the LAN – so we’re upgrading to fibre. It used to be like this on all of our Quads and G5’s. I dont think its an individual issue with this machine with the Xraid Attached.
Next week we have 4 seats of Xsan comming and another 2 Fibre Cards. I am worried that this issue wont go away with spending…
Is fibre for FCP really good ? – Does it make FCP fly and easy to scrub footage ? … i Mean its just DV ? 3.6Mbs.
Jimmy
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| Blocksize | IOPs | Throughput | User CPU | Avg Latency | Max Latency |
+———————+———-+————–+———-+————-+————-+
512 Seq Read 7359.6 3.594 MB/s 2.347 s 0.543 ms 29.319 ms
1 K Seq Read 7442.2 7.268 MB/s 1.187 s 0.537 ms 3.040 ms
2 K Seq Read 7451.5 14.554 MB/s 0.603 s 0.536 ms 5.291 ms
4 K Seq Read 7349.0 28.707 MB/s 0.315 s 0.544 ms 5.236 ms
8 K Seq Read 6800.9 53.132 MB/s 0.148 s 0.587 ms 5.329 ms
16 K Seq Read 5924.8 92.575 MB/s 0.076 s 0.674 ms 5.206 ms
32 K Seq Read 4940.9 154.404 MB/s 0.040 s 0.808 ms 5.448 ms
64 K Seq Read 2900.8 181.300 MB/s 0.021 s 1.376 ms 5.797 ms
128 K Seq Read 1457.5 182.183 MB/s 0.012 s 2.735 ms 16.455 ms
256 K Seq Read 724.5 181.127 MB/s 0.007 s 5.489 ms 19.220 ms
512 K Seq Read 374.9 187.469 MB/s 0.004 s 10.596 ms 19.344 ms
1 M Seq Read 62.6 62.553 MB/s 0.003 s 59.047 ms 431.397 ms
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4 Replies
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I would need more info on the way the system was set up in the server and the raid but you may want to try this. The Qlogic switch is a managed switch. you need to go into the software for the switch, go to port server tab and make your disable the I/O streamguard on your target ports. It’s also a good idea to make the right ports on the switch target ports and left ports the scource ports. You can get all the info on how to do that from the guide book that came with the switch or on the web.
Good luck.
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That’s a good suggestion… We’re scrubbing 1080 and 10-bit Uncompressed with no problems on a similar XSAN setup.
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Hi Guys thanks for comming back to me on this one.
The XSAN is not even set up yet . .. It’s just a local Connection to a volume that is Fibre. Fomatted using Disk Utility.
So…. from a G5 Fibre card to the Qlogic 5200 switch then to the XRAID.
IO Guage says its cranking out 170Mbs + but final cut scrubbs a 9.2 Gb DV file better using a local sata drive or even a Firewire drive ??
I will try the setting for stream guard under the switch panel…
Jimmy
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Ahh thanks … we sorted it or rather the person who said – to mess with the IO Streamguard in the SANbox 5200 san switch manager software under ports after selecting the port. -I switched it on the off on all ports then back into auto and for some reason it just started to work ! Even back to the auto setting as defualt ??
Anyway thnaks guys ! IT sorted problem IO Streamguard – mess with it !.
Now finalcut fly’s – Really smooth scrubbing and i get bout 16 DV streams from one side of the Xraid on Fibre – Thats about the max the MAC can display.
Although i would like to know where to get a new version of the Qlogic San Manager V5.0 – my version is 4.2 as it flags a message saying ” Firmware unsuported” as the firmware is 5.0.
Jimmy
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