New CIFS/Samba speed issues. *Fixed*

[michaeldk]

Hello again,

once again I got samba releated speed issues, that I can not figure out how to solve.

I did a clean install of the latest version of Nas4free (embedded version) and after that my download speed from cifs share is around 500 KB to 1,5 MB, before the clean install I had around 8-10 MB in download speed. When I upload to the server, there are no problems, it is going for full speed with 10 MB per second.

The two images shows respected speed for download and upload for the same file. As you can see there are a vast difference.

I have set my CIFS share as I did before, it follows :

Dos Charset : CP437 (Latin US)
Unix charset : UTF-8
Log level : minimum
Local master browser : yes
Time server : no

Map to guest : never
Buffer size : 64240
Large read/write : on
Sendfile : off (cant be turned on)
EA support : on
Store DOS attributes : on
AIO : off


I have been fiddling around with the options, but cant seem to change the speed.

When tested with scp filetransfer, both ways had around 11 MB transfer per second.

Can anyone help ?

Thanks in advance
Michael

[b0ssman]

can you give us some information on your hardware?

ram, cpu, mainboard, nic. filesystem?

also pls read

http://n4f.siftusystems.com/index.php/2 ... leshooting

[michaeldk]

Yes, have read it, but did not seem to find any help full information in it.

The hardware is as follows :
HP Proliant Micro server HP ProLiant AMD Athlon(tm) II Neo N36L Dual-Core Processor 992MiB RAM - with a Gigabit network card.

I have had the problem before, but last time it helped turning off the AIO function, this however, does not seem to improve performance in the latest version.

[b0ssman]

8-10 mbit for the n36l is far to low.

please post your results from that list.

[michaeldk]

FYI, While the server has an Gigabit networkcard, and the switch can use 1000 MB, all other computers are connected with 100 MB network card, thus making speed > 12,4 MB/s impossible.

Network speed:

Code: Select all

------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
[  4] local 10.0.0.19 port 5001 connected with 10.0.0.2 port 37641
[ ID] Interval       Transfer     Bandwidth
[  4]  0.0-10.0 sec   112 MBytes  94.3 Mbits/sec

Write

Code: Select all

Write speed DD
10000+0 records in
10000+0 records out
20971520000 bytes transferred in 506.901928 secs (41371948 bytes/sec)

Read:

Code: Select all

 Read speed DD
10000+0 records in
10000+0 records out
20971520000 bytes transferred in 475.465577 secs (44107336 bytes/sec)

I've tested the drives for error with fsck and got no errors reported.

Drives are formatted with 4K sectors

Power deamon disabled

I do not use ZFS, all drives are formatted UFS2.

[b0ssman]

40 /44 mbyte/sec read write for a single disc seems very low.

what model is the drive?

[michaeldk]

The drive is a VB0250EAVER HPG0

I dont think it is the drive which are the problem, since I can only get CIFS to transfer around 1-1,5 MB, if I roll back to previously freenas Version, I could get around 8-10 MB transfer when disabling AIO.

Also, upload to CIFS gets stable 10 MB/per second.

[raulfg3]

Try to disable EA, and try to use x2 or /2 in sendfilebuffer eg: try to use 128480 or 32120 and report new test.

[michaeldk]

Try to disable EA, and try to use x2 or /2 in sendfilebuffer eg: try to use 128480 or 32120 and report new test.

Hey, thank you for your answer.

By decreasing the sendbuffer option to 32120, I gained transfer speed to around 9 MB per second.

Am I wrong to think that a larger read buffer is preferable ? Can you give me information on why this had such an impact on the speed?

Anyway, thank you for your help, it really did the trick.