Samba PDC share slow with LDAP backend
- by hmart
The scenario
I have a SUSE SLES 11.1 SP1 machine as Samba master PDC with LDAP backend. In one share there are Database files for a Client-Server application.
I log XP and Windows 7 machines to the local domain (example.local), the login is a little slow but works.
In the client computers have an executable which opens, reads and writes the database files from the server share.
The Problem
When running Samba with LDAP password backend the client application runs VERY SLOW with a maximum transfer rate of 2500 MBit per second.
If disable LDAP the client app speed increases 20x, with transfer rate of 50Mbit/sec and running smoothly.
I'm doing test with just two users and two machines, so concurrency, or LDAP size shouldn't be the problem here.
The suspect
LDAP, Smb.conf [global] section configuration.
The Question
What can I do? I've googled a lot, but still have no answer.
Slow smb.conf WITH LDAP
[global]
workgroup = zmartsoft.local
passdb backend = ldapsam:ldap://127.0.0.1
printing = cups
printcap name = cups
printcap cache time = 750
cups options = raw
map to guest = Bad User
logon path = \\%L\profiles\.msprofile
logon home = \\%L\%U\.9xprofile
logon drive = P:
usershare allow guests = Yes
add machine script = /usr/sbin/useradd -c Machine -d /var/lib/nobody -s
/bin/false %m$
domain logons = Yes
domain master = Yes
local master = Yes
netbios name = server
os level = 65
preferred master = Yes
security = user
wins support = Yes
idmap backend = ldap:ldap://127.0.0.1
ldap admin dn = cn=Administrator,dc=zmartsoft,dc=local
ldap group suffix = ou=Groups
ldap idmap suffix = ou=Idmap
ldap machine suffix = ou=Machines
ldap passwd sync = Yes
ldap ssl = Off
ldap suffix = dc=zmartsoft,dc=local
ldap user suffix = ou=Users
