Hi All,
I have TS1655 (10gbit) w/ quts hero 5.2.1 system volume on 2 ssds, 64gb ram and main volume 12x24TB (WD241KRYZ) RAID-6 64kbit block (207TB thick volume). File copy speed is fine no issues.
I am running adobe media encoder on Win10 to encode videos to ts1655 on my system and I also encode to 673a and 873a. 673a/873a (2.5gbit) has been working flawlessly, but I notice that ts1655 slows down when it creates a temporary file at the end of encoding. The encoding speed to ts1655 is fine-no issues it’s the creation of temporary file before finalizing the encoding that’s slow and is 2x slower than 873a. For example, 14min encode on 873a takes 24min on 1655 and it’s all in the temporary file writing at the end of the encoding.
I noticed that when i have qbitorrent on that’s when it happens- if i have qbitorrent off then i have NO issues-everything is fast and snappy on 1655 with encoding but with qbitorrent on and running, the browsing via windows explorer is a bit sluggish as well ts1655 with qbitorrent on - it just feels a step behind 873a/673a which run regular QTS. The file copy speed has no issues with qbitorrent on or off on ts1655. TS673a/873a are not affected by qbitorrent at all.
Do you know what might be causing it? Tried jumbo 1500/9000 no issues. Issues only start on ts1655 when i have qbitorrent on but i never had such issues on ts673a/873a which were flawless…
Any ideas what settings to try or is it a hardware thing and perhaps i should run 10gbit on a different subnet? Can i prioritize network traffic from adobe media encoder somehow ? Should I try switching from 10gbit adapter to 2.5gbit port and compare behaviour?
My switch is QNAP QSW-M3216R-8S8T-US.
Thank you.
Anatoli
The unit runs an Atom processor, so if you want full speed, make sure you are not running anything on the NAS that could eat CPU (e.g. a torrent program)
Thank you. Not running anything off the NAS. Qbitorrent is running on windows machine and writing/reading from NAS so no applications really running on NAS at all except one-way sync overnight-to local hard drive (wasn’t even running when i was testing adobe/qbitorrent). This kind of workload scenario TS1655 should handle with no issues in my config I think.
CPU utilization on NAS is maybe 15%. and RAM is about 20% (no ssd cache, no dedup/compression enabled) I need to monitor these in detail. If CPU would’ve been the bottleneck I should have seen much higher CPU utilization though right?
My next test would be to move the connection from 10gbit qnap card to 2.5qnap port and see if the issue persists. Any other ideas?
Can it be the 64kb block size I have on Raid-6 volume? Maybe I need to lower it if I have torrents running?
What about the option of ZIL synchronized I/O mode when creating pool? I think i disabled it as I have NAS on separate APC UPS and power loss is not a concern. Can it have anything to do with that? How can I check that setting after storage pool creation?
Thank you.
In that case, how large is that torrent library?
Maybe there is a lot of random IO happening that it slowing down the sequential file transfer (that temp file) you are trying to do.
Miraculously it has been working fine today! I haven’t done anything… Maybe network traffic got balanced out by the switch…Left it to run encoding tasks for a few days and will compare the times with my baseline and make a decision.
I noticed that during writing of the temp file CPU was mostly below 20% usage with occasional spikes to 38% and ram stable at 22% utilization.