[Samba] Slow Samba transfer
L.P.H. van Belle
belle at bazuin.nl
Fri Feb 14 01:50:59 MST 2014
also,
what i forgot, om only getting the 110Mb/s + because of format.
I formatted with 4Mb block size, since this is a Movie share on my server.
the "normal" music share are 1Mb blocks formated. ( about 80-100Mb/s )
all my other default. ( variable from about 60-100Mb/s )
and on debian you can do a apt-get install iotop
and type iotop, to see you read/write speeds on the server and which apps are working.
Louis
>-----Oorspronkelijk bericht-----
>Van: dcmwai at gmail.com [mailto:samba-bounces at lists.samba.org]
>Namens Chan Min Wai
>Verzonden: vrijdag 14 februari 2014 9:37
>Aan: Mauro Condarelli
>CC: samba at lists.samba.org
>Onderwerp: Re: [Samba] Slow Samba transfer
>
>Dear Mauro,
>
>if you are using the latest version on samba 3.x and above (as
>I can recall)
>I would advise you to drop all the socket options and etc...
>
>
>The new version of samba with the new linux kernel are able to
>adjust that
>without much adjustment...
>
>However, since your are behind the vm...
>you might want to try a small fio test to see if the limit was
>vm or etc...
>
>http://www.linux.com/learn/tutorials/442451-inspecting-disk-io-
>performance-with-fio
>
>Hope this help...
>
>
>On Fri, Feb 14, 2014 at 7:51 AM, Mauro Condarelli
><mc5686 at mclink.it> wrote:
>
>> 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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