QNAP 559 Pro II rsync unusably slow

[lodester]

Hi everyone,

I am trying to figure out why my new 559 P2 rsync jobs are stuck at around 10MB/sec. Some facts:
1) The two NAS's are on the same switch and negotiate to gigabit speeds.
2) There is no other activity on either NAS
3) The target (ix4-200d) is capable of far greater write throughput
4) Almost all the files are large(200+MB), solid archives. so this can't be explained by a lot of windowing in TCP to ramp up the throughput

I don't really know what to do. It is very difficult getting a hold of qnap support but I will try again today. Any tips on how to get qnap's attention are also welcome.

It sure looks like there is some kind of 100Mb throughput limitation but I just can't figure where it is coming from.

Thanks in advance for any help

 

[thiggins]

NAS read/write performance doesn't really predict its rsync performance. Go look at the charts and compare http://www.smallnetbuilder.com/nas/nas-charts/bar/57-network-backup to, say http://www.smallnetbuilder.com/nas/nas-charts/bar/1-filecopy-write.

 

[lodester]

Thanks for the reply. I understand that there are multiple factors that determine throughput capacity for any given transfer - my point was it is clearly not the hardware holding things back.

a 75% reduction in capacity though is a pretty unacceptable software implementation. How can anyone use rsync if this is anything close to a normal result? I was hoping I could use a native nas-to-nas solution but I guess the low end market just isn't there yet.

 

[JoeJoe]

What does the cpu graph show?

Did you select encryption or compression?

 

[thiggins]

What "cpu graph"?

All backup tests are run without encryption and compression.

 

[JoeJoe]

http://docs.qnap.com/nas/eng/resource_monitor.htm