[Samba] samba 4.x slow ...

[Dr. Peer-Joachim Koch]

On 02.11.2017 18:57, Jeremy Allison via samba wrote:
> On Thu, Nov 02, 2017 at 02:05:18PM +0100, Dr. Peer-Joachim Koch via samba wrote:
>> Hi,
>>
>>
>> we are running samba 4.4 on two machines as file servers.
>>
>> Both are running a GFS (stornext). The storage is attached using 8G HBA.
>>
>> You can get up to 800MB/s local speed. We are exporting the shares
>> using 2x1GB
>>
>> and 2x10G. However the clients are only getting 40-50MB/s. With
>> samba3 I think we had up to 80-90MB/s.
>>
>> Using a 100MB/s link for the client we see 12-13MB/s (wire speed).
>>
>> Using NFS (3) we see up to 120MB/s (GB). How can we improve the speed ?
>>
>> How can we find the bottle neck ? (I tested already various samba
>> versions (4.4{5,6}) without
>>
>> any success.
> What clients ? What protocol are they using ? What is your
> smb.conf. These are some basics we'll need to proceed.
>
Hi,

sorry for the missing information's. Most of the clients are windows 7, 
we still have also
some older windows versions. Also  all kind of MAC (10.6-12) is in use. 
I did all measurements using a windows 7
system (dual boot linux). The folder I used contains only 50 ISO-files. 
I copied one ISO (2.5GB) multiple times (3-5) in both
directions.

We have two different samba setups, one we created(A) which was a little 
bit modified from Björn Jacke when we moved our domain to samba4.
The second one is from a appliance (Quantum so called work flow 
extender(WFE)-(B)). This system is preconfigured from quantum.
Both setups are showing for large files the same (bad) performance 
(40-50MB/s).


smb.conf (A) running on SuSE SLES 11 SP2 (sernet-samba-4.4.14-40)

[global]
         workgroup = BGC
         client ldap sasl wrapping = sign
         server string = DVA. BGC New SNFS Fileserver for Group folders 
(Minerva)
         interfaces = lo bond0:min
         security = ads
         load printers = No
         show add printer wizard = No
         log level = 4 winbind:5
         printcap cache time = 0
         map to guest = Bad User
         log file = /var/log/samba/%I.log
         read only = no
         max disk size = 4194300
         idmap config BGC : backend = ad
         idmap config BGC : range = 100-999999
         idmap config * : backend = tdb
         idmap config * : range = 1000000-1999999


smb.conf (B) running CENTOS 6.6 (sernet-samba-4.2.12-20)

[global]
     workgroup       = BGC
     server string   = "Quantum Appliance Controller"
     security        = ads
     password server = *
     passdb backend  = tdbsam
     template shell  = /bin/bash
     template homedir = /home/%u
     winbind separator = +
     local master    = no
     domain master   = no
     auth methods    = guest sam_ignoredomain winbind
     guest ok        = no
     winbind use default domain = yes
     allow trusted domains = yes
     winbind enum users = no
     winbind enum groups = no
     winbind nss info = template
     winbind nested groups = yes
     idmap config BGC : backend = ad
     idmap config BGC : default = yes
     idmap config BGC : range = 100-33554431
     idmap config BGC : schema_mode = rfc2307
     idmap config * : range = 33554432-67108862
     idmap config * : backend = tdb
     printing        = bsd
     load printers   = no
     disable spoolss = yes
     printcap name   = /dev/null
     log level       = 1
     log file        = /var/log/samba/samba.log.%m
     debug timestamp = yes
     oplocks         = 1
     unix extensions = yes
     smb ports       = 445, 139
     mangled names   = yes
     default case    = lower
     preserve case   = yes
     short preserve case = yes
     enable core files = no
     winbind max clients = 1000
     winbind request timeout = 60
     bind interfaces only = yes
     case sensitive       = auto


What else would be helpfull ?

Thanks a lot!

-- 
Bye,
     Peer
________________________________________________________

Max-Planck-Institut für Biogeochemie
Dr. Peer-Joachim Koch
Hans-Knöll Str.10            Telefon: ++49 3641 57-6705
D-07745 Jena                 Telefax: ++49 3641 57-7705