Utterly slow SMB/CIFS network * Fixed *

[michaeldk]

Hello

I got a returning problem with my SMB shares on my Nas fopr Free server. Some of the files i transferring extremely slow, we are talking about 36 KB per second on a 100 MB/s network. When I use SCP the files are transfered with 11 Mb/s.

Some of the other files are transferring around 6 - 9 MB/s with the SMB protocol and others with less than 100 KB/s.

I tried running fsck on the disk and it replied no errors on filesystem I tried restarting the server with no change in speed.

I cant seem to figure out what is causing the problem, maybe some of you in here know how to get the speed up and running.

Thanks in advance

Michael

[kkd]

hello Michael,
can u post the hardware configuration and your cifs/smb settings?

[dnar]

Try enabling sendfile and AIO in the cifs page. You can also tweak the buffer sizes, but I have found the defaults to be ok.

[michaeldk]

Hi all and thanks for your replys

@ Kiss.daniel

The hardwáre it is running on is a HP Proliant Micro server @ NAS4Free 9.1.0.1 (revision 724) x64-embedded; HP ProLiant AMD Athlon(tm) II Neo N36L Dual-Core Processor 992MiB RAM - with a Gugabut network card.

My CIFS/SMB settings are pretty much standard.
Enable 'Asynchronous I/O (AIO)' switch
Enable 'Large read/write' switch
Enable 'Tuning' switch

For some reason I cant enable the Send file option. When I click save settings after I checked the box, the marker is gone again?

Is there any other information you need to help me?

Thanks

[michaeldk]

@dnar

Do you have any recommendations for the buffer size? I am not sure what I should try and could not find any helpful information on google

[kkd]

maybe u got lots of permissions and u copy lots of small files.
maybe u got lots of snapshots.

[michaeldk]

I've just tested a file transfer

When downloading a .tar.lzma file which is around 98 MB big, it downloads with around 100 KB per second. And the filed is corrupted when the transfer is done. But when I upload the same file, it upload with around 8 MB per second.

Any ideas ?

[michaeldk]

I've disabled the snapshots in the share tabs. Snapshots only work for ZFS right? I am running UFS file system.

[kkd]

maybe ur network card is not fully supported or u got same kind of hw failure like bad memory...

[kkd]

run smart tests

[kkd]

but 1st disable aio

[michaeldk]

Huh, disabling the AIO did the trick, I got full speed in downloading ! Thanks, that really helped me a lot !

Can you explain to me why that was the cause of the error ?

[kkd]

aio can cause low cache usage.