[Samba] Slow Samba transfer

[L.P.H. van Belle]

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

Im using the default config. 

Which XEN are you running, XEN Server, or Debian XEN and which version. 
And type samba -V and post your output. 

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? 
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.. 

Louis



>-----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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