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Network Bottlenecks
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2015-04-25
11:03 AM
2015-04-25
11:03 AM
Network Bottlenecks
I currently am coming into troubleshooting performance issues when accessing the server in a small business. There is a 48 port 10/100 switch that is 95% full and outside of thise are a small handful of 5 port gigabit switches going to various workstations. I have a RN104 (6.2.2, 4 x 2TB drives) that we use strictly as a file server with 15 or so users. Typically there are not more than 3-5 accessing this unit at a given time which is all done through mapped network drives directly to the shares in Windows (mixture of 7 and 8.1 machines).
Over the past month performance has gotten noticeable worse with no apparent cause or changes in our network. When opening a folder on a share there is a good 45-60 second delay for the file structure to load from multiple different machines. This does seem to be worse and more reproducible in 2 specific share folders that are very large.
Any suggestions on where to start looking or apps to try and help me with this?
I am considering an upgrade to a RN512 unit down the road and a Gigabit switch but that isn't in our budget right now and I have been tasked with getting performance back to the 10mbs mark we were hitting before.
Over the past month performance has gotten noticeable worse with no apparent cause or changes in our network. When opening a folder on a share there is a good 45-60 second delay for the file structure to load from multiple different machines. This does seem to be worse and more reproducible in 2 specific share folders that are very large.
Any suggestions on where to start looking or apps to try and help me with this?
I am considering an upgrade to a RN512 unit down the road and a Gigabit switch but that isn't in our budget right now and I have been tasked with getting performance back to the 10mbs mark we were hitting before.
Message 1 of 5
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2015-04-25
03:18 PM
2015-04-25
03:18 PM
Re: Network Bottlenecks
Do you have snapshots enabled? If so, you could be getting fragmentation.
Perhaps start with deleting existing snapshots on the one of the shares that is slow (assuming snapshots are enabled), and then run a defrag on the volume. Running a balance might be a good idea also.
Perhaps start with deleting existing snapshots on the one of the shares that is slow (assuming snapshots are enabled), and then run a defrag on the volume. Running a balance might be a good idea also.
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2015-04-27
06:02 AM
2015-04-27
06:02 AM
Re: Network Bottlenecks
I did run a balance over the weekend. Snapshots are currently disabled.
I was able to get the NAS backend back up with help from MGM over the weekend.
One of the folders we are having issues with specifically has 532 sub folders in it. Is this why it is taking so long to load? If that is the case maybe speed could be an issue?
I have a 5 port Gigabit switch I am considering tagging into our main switch and having a couple of our heavy hitting users plug directly into the same gigabit switch as the NAS would that be a good test?
I was able to get the NAS backend back up with help from MGM over the weekend.
One of the folders we are having issues with specifically has 532 sub folders in it. Is this why it is taking so long to load? If that is the case maybe speed could be an issue?
I have a 5 port Gigabit switch I am considering tagging into our main switch and having a couple of our heavy hitting users plug directly into the same gigabit switch as the NAS would that be a good test?
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2015-04-27
08:51 AM
2015-04-27
08:51 AM
Re: Network Bottlenecks
Here is a copy of my NAS performance tester results:
Running a 400MB file write on Z: 5 times...
Iteration 1: 11.57 MB/sec
Iteration 2: 8.17 MB/sec
An error occured: The file 'Z:\3test.tmp' already exists.
Running a 400MB file read on Z: 5 times...
Iteration 1: 1.66 MB/sec
Iteration 2: 11.45 MB/sec
Iteration 3: 0.85 MB/sec
Iteration 4: 4.82 MB/sec
Iteration 5: 1.30 MB/sec
-----------------------------
Average (R): 4.02 MB/sec
-----------------------------
Running a 400MB file write on Z: 5 times...
Iteration 1: 11.57 MB/sec
Iteration 2: 8.17 MB/sec
An error occured: The file 'Z:\3test.tmp' already exists.
Running a 400MB file read on Z: 5 times...
Iteration 1: 1.66 MB/sec
Iteration 2: 11.45 MB/sec
Iteration 3: 0.85 MB/sec
Iteration 4: 4.82 MB/sec
Iteration 5: 1.30 MB/sec
-----------------------------
Average (R): 4.02 MB/sec
-----------------------------
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2015-04-27
11:31 AM
2015-04-27
11:31 AM
Re: Network Bottlenecks
Those times are not good at all.
Could you try a test with a direct connect from the PC to the NAS?
Could you try a test with a direct connect from the PC to the NAS?
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