Hi, I'm getting tired of getting slow transfer speeds (13MB write and 24MB read) to my unraid and I know I could find the bottleneck with the proper tools. I have everything I need on my vista client machine but I need help on the linux side. Is there anything to monitor disk throughput and network transfer speed?

Try this nice little utility

 

http://sourceforge.net/projects/bwmng

 

for network monitoring.

 

Using it myself.

 

BR

Pre compiled slackware package here http://repository.slacky.eu/slackware-12.1/utilities/bwm-ng/0.6/

 

store it on your flash in /boot/packages

 

install wioth

 

installpkg /boot/packages/bwm-ng-0.6-i486-2bj.tgz 

 

to make it installed iupon every boot, put the installpkg command in your /boot/config/go script.

If I'm not mistaking the normal write speed is about 10 to 13 mb a sec, without a cache drive, with a cache drive i get 20 mb a seconds up and 25 to 30 mb download.

Oh, and i'm using gigabit switches and cards, and i'm using all the performance tweaks like ie: blockdev --setra 2048 $i

Thanks I will try this.....

 

I am getting the same type of performance on a new AMD Motherboard System with a really fast dual core proc. 2Gig of ram and 3 1.5TB drives...  Adding the read look ahead buffer got me from 20 to 24-26 Megabytes per second but its still dog slow compared to what it should be capable of... I was just reading the benchmarks on Small Net  builder and they are getting 3X the performance with slower HW....  I have AHCI enabled in the BIOS....

 

Any experienced users have any performance tips for newbies to unraid...

 

Sean

Thanks I will try this.....

 

I am getting the same type of performance on a new AMD Motherboard System with a really fast dual core proc. 2Gig of ram and 3 1.5TB drives...  Adding the read look ahead buffer got me from 20 to 24-26 Megabytes per second but its still dog slow compared to what it should be capable of... I was just reading the benchmarks on Small Net  builder and they are getting 3X the performance with slower HW....  I have AHCI enabled in the BIOS....

 

Any experienced users have any performance tips for newbies to unraid...

 

Sean

 

Small Net Builder made an Unraid box?  Link?

 

Are the performance measurement methods the same?  My Unraid box writes 50MB/sec and 10MB/sec, depending on how you measure performance.

 

 

Cheers,

Bill

http://www.smallnetbuilder.com/content/view/30247/75/

 

My measurements are reading and writing 4gig ISO files.

 

Sean

Please see this thread for a very interesting discussion of network latency.  This thread may also be pertinent.

 

Also see the Improving unRAID Performance wiki page.

latency should not be an issue.

 

I get 2x the performance from my other NAS all day long without issue and 3X that going peer to peer between two XP machines...  I know my XP machines have adequate TCP window size.  How can I increase the TCP window size on unraid and if that is the issue why is it not set for GigE from Lime Tech?

 

Sean

latency should not be an issue.

 

I get 2x the performance from my other NAS all day long without issue and 3X that going peer to peer between two XP machines...  I know my XP machines have adequate TCP window size.  How can I increase the TCP window size on unraid and if that is the issue why is it not set for GigE from Lime Tech?

 

Sean

 

2nd thread mentioned has no good info in there....  my wiring is all up to snuff and 2 other XP machines and infrant N5200 provide reference for the benchmarks. my issue is unraid...

 

Sean

Please see this thread for a very interesting discussion of network latency.  This thread may also be pertinent.

 

Also see the Improving unRAID Performance wiki page.

 

OK I had already went through the tips suggested on the performance wikki.  increasing the look ahead buffer defintely helped read performance but its still 1/2 to 1/3 the performance of this same HW running windows...

 

Any ideas?

 

Sean