[Samba] Slow Samba transfer

[Mauro Condarelli]

Thanks,
Comments below:

Il 14/02/2014 09:46, L.P.H. van Belle ha scritto:
> Hai,
>
> Im having the same setup here, and im able to get about 110MB/s+ so its a very low speed your getting.
>
> i suggest the following, since im having almost nothing tunned in my smb.conf.
> make a backup of your original smb.conf and start cleaning up.
>
> remove all of these.
>>     strict allocate = yes
>>     read raw = yes
>>     write raw = yes
>>     strict locking = no
>>     socket options = TCP_NODELAY IPTOS_LOWDELAY SO_RCVBUF=65536
>> SO_SNDBUF=65536 SO_KEEPALIVE
>>     min receivefile size = 16384
>>     use sendfile = true
>>     aio read size = 1
>>     aio write size = 1
>> ;   vfs objects = aio_fork
Will do, but that is exactly the situation I started from (all defaults, 
I mean).
Then I noticed the sslowness ands started adding things.
Nothing changed.
I will revert to basics.
>
> Im using the default config.
>
> Which XEN are you running, XEN Server, or Debian XEN and which version.
I'm using Debian XEN (xen-4.1).

> And type samba -V and post your output.
I assume You mean:
root at fileserver-pv-guest:~# smbd -V
Version 3.6.6

>
> There where some problems with pci passthrough on Debian Xen.
>
> If you type on the guest, ethtool eth0 ( of 1 depends on your interface )
> whats the speed your seeing?
uhm, I do not know ethtool and output seems a bit terse:
root at fileserver-pv-guest:~# ethtool eth0
Settings for eth0:
         Link detected: yes

Perhaps I shoud use some options?

> and, dont test with wifi (yet), start testing on the cable (utp) first.
> When your speed is ok with cable you can start testing with the wifi.
> Wifi tunning is lots different..
Agreed.

>
> Louis
Mauro
>
>
>
>> -----Oorspronkelijk bericht-----
>> Van: mc5686 at mclink.it [mailto:samba-bounces at lists.samba.org]
>> Namens Mauro Condarelli
>> Verzonden: vrijdag 14 februari 2014 0:51
>> Aan: samba at lists.samba.org
>> Onderwerp: [Samba] Slow Samba transfer
>>
>> Hi,
>> this is my first pos here, please be lenient.
>> My problem shuld be a FAQ and, in fact I found a lot of references
>> googling around, but nothing could really solve my problem, so
>> here I am.
>>
>> I have a Samba server:
>> Very basic wheezy amd64 installation on a small VIRTUAL server (Xen).
>> Only fancy thing is direct access to a couple of RAID1 (mirror) arrays
>> where data is stored.
>>
>> I normally access data from Windows (mostly Seven) machines connected
>> either via ethernet GB hub (but some machines are 100MB) or
>> via WLan(N).
>>
>> Problem is throughput is generally low (about 1 mb/s) and, for really
>> big files (> 1Gb) it drops with time going to the range of few
>> hunderd kb/s.
>>
>> Transferring a 4Gb file takes HOURS.
>>
>> I do not believe it's normal, is it?
>>
>> I started with the plain wheezy-provided setup and tried to improve it
>> following several advices found around the net, but I did not see any
>> difference.
>>
>> Things I tried are:
>>
>>     strict allocate = yes
>>     read raw = yes
>>     write raw = yes
>>     strict locking = no
>>     socket options = TCP_NODELAY IPTOS_LOWDELAY SO_RCVBUF=65536
>> SO_SNDBUF=65536 SO_KEEPALIVE
>>     min receivefile size = 16384
>>     use sendfile = true
>>     aio read size = 1
>>     aio write size = 1
>> ;   vfs objects = aio_fork
>>
>> in various combinations.
>> Last option does not seem to be supported in Wheezy:
>>
>> [2014/02/14 00:47:09.185334,  0] smbd/vfs.c:173(vfs_init_custom)
>>    error probing vfs module 'aio_fork': NT_STATUS_UNSUCCESSFUL
>> [2014/02/14 00:47:09.185397,  0] smbd/vfs.c:315(smbd_vfs_init)
>>    smbd_vfs_init: vfs_init_custom failed for aio_fork
>> [2014/02/14 00:47:09.185440,  0]
>> smbd/service.c:902(make_connection_snum)
>>    vfs_init failed for service IPC$
>>
>>
>> What should I do?
>> Thanks in Advance
>> Mauro
>>
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>>
>