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Author Topic: Mount DNS-321 on Linux  (Read 7842 times)

chucker

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Mount DNS-321 on Linux
« on: January 14, 2010, 09:05:20 AM »

It was fairly easy for me to mount my DNS-321 volume on my Linux system (SLED 11):

fstab entry is:

//DNS-321_IPaddress/volume_1/folderName  mountPoint  cifs  guest,_netdev  0  0

Performance was a bit slower than I expected.  Roughly between 250 & 300 MB/S.

It is on a 1 GB network.  The DNS-321 is cable connected to the network.  The Linux system can be cable connected, but these measurements were using the wireless connection.

Are there special Linux mount option values, in addition to guest and _netdev, I can use to imporve performance on Linux?
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gunrunnerjohn

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Re: Mount DNS-321 on Linux
« Reply #1 on: January 14, 2010, 11:27:01 AM »

Wireless is a LOT slower than wired connections for file transfers.  Try a wired connection and see what your results are.
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Microsoft MVP - Windows Desktop Experience
Remember: Data you don't have two copies of is data you don't care about!
PS: RAID of any level is NOT a second copy.

chucker

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  • Posts: 3
Re: Mount DNS-321 on Linux
« Reply #2 on: January 14, 2010, 02:13:20 PM »

Thanks for reminding me about the wired vs. wireless comparisions.

One big oops on my part.  I was off by a factor of 1024 on my performance measurements.  They were really 250 - 300 Kbps on the wireless network.

On the wired network, the performance is much better but still seems slow.  11 Mbps on the wired network is almost 4 times better than the wireless network, but on a Gigabit network, I expect them to be much higher, in the 3 digit range of Mbps.

Looking for mounting options that might improve performance.  Is there a way to see from the DNS-321 what the Blocksize is, and possibly read-ahead parameters that work better than others?
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gunrunnerjohn

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Re: Mount DNS-321 on Linux
« Reply #3 on: January 14, 2010, 02:18:52 PM »

Is this megabytes/sec or megabits/sec?

You should see in the mid teens or a bit better with gigabit connections.  That's megabytes/sec I'm speaking of.

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Microsoft MVP - Windows Desktop Experience
Remember: Data you don't have two copies of is data you don't care about!
PS: RAID of any level is NOT a second copy.

chucker

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  • Posts: 3
Re: Mount DNS-321 on Linux
« Reply #4 on: January 14, 2010, 04:23:10 PM »

When the b is lower case, it is Megabits per second.  I calculated as follows:

bytes_xfered * 8 bits_per_Byte / (endtime - starttime) / 1024 / 1024

to get Megabits per second.

1104393107 * 8 / 721 / 1024 / 1024 = 11.686 Mbps.
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gunrunnerjohn

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Re: Mount DNS-321 on Linux
« Reply #5 on: January 15, 2010, 05:48:35 AM »

That seems a bit low, though I haven't run without jumbo frames for some time, so maybe my memory faded. :D
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Microsoft MVP - Windows Desktop Experience
Remember: Data you don't have two copies of is data you don't care about!
PS: RAID of any level is NOT a second copy.