[Samba] Low speed in Smaba sharing

Andreas Heinlein aheinlein at gmx.com
Tue Dec 5 07:52:31 UTC 2017


enforcement of smb signing is independent of whether the client is
joined to the DC or not. On Windows, it is controlled by a registry key
that applies to all SMB traffic. It is explained in detail here:

With samba, server signing is controlled by the value of "server
signing" in smb.conf. The default behaviour follows that of Microsoft's
recommendations, i.e. "mandatory" on a domain controller. You could try
to set "server signing = disabled" in your smb.conf, that should
increase your speed. Be sure you understand the security implications of


Am 05.12.2017 um 06:40 schrieb sam zand via samba:
> Hi friend,
> thanks fore your helps,
> but, you allow still i explain more about my problem,
> I setup DC but windows clients dont join in DC,
> how can increase speed? or how i have  AD feature in samba without decrease
> performance?
> thanks,
> On Mon, Dec 4, 2017 at 11:03 PM, Andreas Heinlein via samba <
> samba at lists.samba.org> wrote:
>> Am 04.12.2017 um 11:03 schrieb sam zand via samba:
>>> Hi dears,
>>> how are you?
>>> my friends, i installed samba 4.7 on centos 7 , i need to use Active
>>> Directory in Samba,
>>> i connect to sharing with windows client, through user and pass samba AD,
>>> i use 1G ethernet connection between client and file server,
>>> but when i copy a file  from windows to file server,
>>> speed copy is about 30-50 MB/s (show in copy progress in windows),
>>> while before i use from samba without AD , speed was about 110 MB/S,
>>> what happen in samba with Active Directory that causes speed be low?
>>> any way exist for solve it?
>> Are you running the AD DC and file sharing on the same samba? Don't do
>> that. Even Microsoft recommends that a DC is not used for file serving.
>> This is because SMB signing is required when talking to a DC, this also
>> applies to file sharing traffic. This puts heavy load on the server and
>> will limit the effective bandwidth. I tested this with a "real"
>> Microsoft Windows Server and got about the same figures as you: the same
>> hardware as DC gives 30-40 MB/s, as a member server I got ~100MB/s.
>> If you have only one physical machine, move the DC to a virtual machine.
>> Bye,
>> Andreas
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