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DS1019+ - UC5G1T suddenly writes slower #61
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How did you measure the throughput? |
To measured the speed I just started copying a large file (always the same file) to/from the NAS via a mapped network drive in Windows and looked at the speed it settles at after a few seconds. It's not very scientific. I set the MTU to 9000 and that did something. Here are the results reported by that NAS tester: Club 3D: Running a 2000MB file read on X: 5 times... QNAP: Running a 2000MB file read on X: 5 times... Unfortunately the QNAP adapter works somewhat unstable. I did a stress test and at around 7 TB of reading/writing I went and downloaded a thing (25 MB/sec or less) to the network drive and it just went unresponsive. Any program that tried to access the drive just froze. In further tests it would also happen after just a few GB without additional load. It seems to happen every few minutes now if too much data is being transferred. Also tried both USB ports and disabling the SSD read/write cache. The speed also varies quite a bit. Here is another QNAP test I just took: Running a 2000MB file write on X: 5 times... Running a 2000MB file read on X: 5 times... My network knowledge is kind of limited so I don't know if that's expected or not. Maybe the DiskStation was busy with something else, though I wouldn't know what. Or maybe it's the program. |
I guess that instability of performance is caused by storage and cache. So could you try to measure pure network throughput using iperf? |
I close this issue due to no response. Please feel free to re-open. |
Description of the problem
Not quite sure if this is even related to the driver.
Initially I had the Club 3D 2.5G adapter (with r8152-apollolake-2.15.0-5.spk) and it ran without problems. Reading and writing reached around 280 MB/sec. I didn't do any configuration changes.
Yesterday I got my hands on a QNA-UC5G1T and installed it just to see how much of a difference it makes (using aqc111-apollolake-1.3.3.0-5.spk). I can't quite remember but I'm pretty sure the write speed increased to about 360 MB/sec. Reading went up to 390 MB/sec.
Today I noticed that the write speed went down to around 220 MB/sec (reading is still at 390). I rebooted NAS, PC and router (just in case), reinstalled the driver, used the other USB port and checked if the Club 3D adapter still performs as before (it does). I also undid some of my cable management to make sure that no other cables get near the adapter.
The only thing I didn't test was replacing the USB C to A cable because I noticed that I don't have one with USB 3.
In short:
2.5G: 280/280
5G yesterday: 360/390
5G today: 220/390
I have no idea what changed.
Description of your products
DS1019+
Linux DS1019 4.4.180+ #42218 SMP Mon Oct 18 19:17:56 CST 2021 x86_64 GNU/Linux synology_apollolake_1019+
DSM 7.0.1-42218 Update 2
QNAP QNA-UC5G1T
Description of your environment
DS1019+ is directly connected to an AQtion AQC107 (10G, onboard) with a CAT 8.1 cable.
Output of
dmesg
commandOutput of
lsusb
commandOutput of
ifconfig -a
commandThe text was updated successfully, but these errors were encountered: