Unfortunately no one can be told what fun_plug is - you have to see it for yourself.
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I have (2)x1TB Samsung spin point drives set up separately in a DNS-323 (1.5FW) with jumbo frames set to 4k on both NAS and PC nik card.
I have a gigabit cat 6 network setup and I transferred 100 gigs to my vol 1 drive which took 4 hours. I transferred approx 400 gigs to vol 2 and it took 12 hours.
My method was simply using a Win XP SP3 machine which I network browsed to the NAS and copied over files right from Win Explorer.
I would of though performance would have been better. Is this the norm or is something wrong?
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If my match is correct, those translate to approximately 6.9MB/s and 9.3MB/s?
Sounds a bit slow to me. Without jumbo frames, you should expect about 14-18MB/s; with jumbo frames, the speed can exceed 20MB/s. Of course, I don't know enough about the rest of your setup, these are generic figures.
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I think its more an issue with CPU horsepower on the DNS. When copying a large file from the DNS to my XP/SP3 machine via Gigabit network, I am seeing the SAMBA process on the DNS that supports the copy operation running at >90% CPU. The SAMBA process is very CPU intensive.
Even with normal frame size, I can achieve about 1 Gig a minute copying data to or from the DNS via SAMBA.
I will do some copies using FTP (which is arguably a lot more efficient than SAMBA) and see what throughput I can get.
Last edited by jesbo (2008-11-06 21:16:16)
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1 Gig a minute translates to 16.7MB/s, which is inline with my expectations.
bent98 is getting significantly slower speeds, which means that the problem is probably somewhere else.
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The computer is a C2D overclocked @ 3.6ghz.
Should be enough horsepower?
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bent98 wrote:
The computer is a C2D overclocked @ 3.6ghz.
Should be enough horsepower?
Of course.
Turn jumbo frames off and see what you can get.
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What is not discussed here is the file size - based on my experience the only way to get 14~18 MB/sec with jumbo frame and >20 MB/sec with jumbo frame is when transferring large files - when transferring small files the performance drops considerably.
If you like you can try transferring a single 2GB file and compare it to 1000 x 2MB files.
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well I i will test when I get home. I was transfering thousands of small files and maybe 10% large files.
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My 1 Gig per minute throughput was based on transferring a 30 Gig File. I agree transferring lots of small files really degrades performance as there is a lot of overhead creating new files, opening and closing files, etc.
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