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Rn312 (and Duo v1): Transfer speeds - manage my expectations!
This is another quesiton about transfer speeds. I am aware that there are so many variables involved in optimising these so I'm going to state my situation and hope for some broad guidance on what my expectations about transfer rates should be. I don't expect definitive answers nor am I expecting advertised rates of transfer. However, with a new RN312, I'm hoping finally to get to the bottom of this and get better performance from my NAS.
Some info about my setup.
1 I have a RN Duo v1 and an RN312.
2 Both the Duo and the RN312 are plugged directly into the router (which has gigabit switches).
The Duo shows flashing green and sold amber lights on the ethernet port (not listed in the manual!) but frontview reports it connecting at 1000 full duplex
The RN312 shows a solid green and a flashing green. So I'm assuming this is connected at 1Gbps too.
3 My PC is attached to my router via this powerline adapter which I know does NOT have a gigapit port.
4 The MTU of my PC (win10), Readynas v1 and RN312 is set to 1492 on each. (Default was 1500 but really it seems to make little difference between these two values)
Q1: My PC reports via the ethernet connection properties (Link Speed) that it is connected at 1.00Gbps Full Duplex. How is this so when it is running over these powerline adapators?
Q2: Dragging a file via my PC (win10) to the NAS transfers at approx 7MB/s - is that an expected speed?
Q3: Dragging a file from my RN312 (or Duo) to the PC transfers at approx 3MB/s - is that an expected speed?
Please help. I've endured speeds around 5MB/s on my Duo for years and it's never been a big deal. However, with needs to transfer ever larger files over the network - mainly streaming >2GB files - I'm now determined to get better performance from a newer NAS.
EDIT: Duo = Radiator 4.1.14, RN312 = 6.5.0
4 Replies
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hander2 wrote:
Q1: My PC reports via the ethernet connection properties (Link Speed) that it is connected at 1.00Gbps Full Duplex. How is this so when it is running over these powerline adapators?The trendnet adapter DOES have a gigabit ethernet connection, and that is all the PC sees. The adapter can't deliver one gigabit over the power circuit, but that is a different matter.
hander2 wrote:
Q2: Dragging a file via my PC (win10) to the NAS transfers at approx 7MB/s - is that an expected speed?
Q3: Dragging a file from my RN312 (or Duo) to the PC transfers at approx 3MB/s - is that an expected speed?
Both speeds are slow, and the powerline link is almost certainly the reason. The only good way to confirm that is to move the PC so you can try a test connected directy to the router.
Options include:
-trying different outlet pairs. Try to connect directly to the wall outlet and not to a power strip.
-upgrading the AV-500 adapters to the newer AV-1200 standard
-look into powerline filters. Some powerline adapters have them built in, but not all.
You could also potentially switch to 5 Ghz 802.11ac wifi, but that might not work any better (both wifi and powerline performance depend on the details of the environment).
The highest performing option is of course to install gigabit ethernet.
Thanks Stephen. That's all really useful.
The link I provided was to a TP-LINK AV500 powerline adaptor (not trendnet) and if you scroll down the amazon page to the table, you'll see the PA411KIT doesn't have a gigabit ehthernet connection.
Here's the link again in case something is going awry above.
If you agree, my Q1 is still confusing me.
In the meantime, I will try a direct connection of the PC to the router too - just to rule out the powerline upgrading issue.
I'm going to try a q4, too. On a RSYNC backup from the Duo to the RN312, can I see the speed of that backupjob in the System>Performance>Network on front view of the RN312? If so, that's showing about 3-4MBps. But as I understood it, this is a NAS to NAS backup so why is it that slow?
hander2 wrote:
Thanks Stephen. That's all really useful.
The link I provided was to a TP-LINK AV500 powerline adaptor (not trendnet) and if you scroll down the amazon page to the table, you'll see the PA411KIT doesn't have a gigabit ehthernet connection.
I did click on the link, but entered the wrong thing when I googled for the specs (and when I posted). Some AV500 adapters do provide gigabit, the TP-Link seems to start that with their AV600 product.
That does make the PC report confusing on speed confusing.
hander2 wrote:
I'm going to try a q4, too. On a RSYNC backup from the Duo to the RN312, can I see the speed of that backupjob in the System>Performance>Network on front view of the RN312? If so, that's showing about 3-4MBps. But as I understood it, this is a NAS to NAS backup so why is it that slow?
It is NAS-NAS, but rsync is computationally more demanding than NFS or SMB. The duo's CPU is quite slow, and that is the limiting factor. Rsync is of course very robust, and incremental backups are usually small - the speed is enough to get the job done, but not stellar.
You can do a test using Windows (SMB) backup job on a test share. That should give you something in the 15-20 MB/s range (again limited by the older Duo).
Your large file copy speed from a new PC to the RN312 should be close to 100 MB/sec (see the RAID-1 performance results here: http://www.smallnetbuilder.com/nas/nas-reviews/32180-netgear-readynas-300-series-reviewed?showall=&start=1).
BTW, NasTester is a pretty good tool for performance measurements: http://www.808.dk/?code-csharp-nas-performance.
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