[Samba] Samba 4 slower file transfer under AD DC mode

[Dante Colo]

Hi, 


I´m running a samba 4.0.16 under Debian Squeeze 6.0.9, i´ve noted under standalone role mode file transfer on shares is almost twice as fast compared to AD DC mode for big and small files .Settings for the shares when was testing under standalone mode was exactly the same, any suggestions ? 



root at pdc:~# testparm 
Load smb config files from /etc/samba/smb.conf 
rlimit_max: increasing rlimit_max (1024) to minimum Windows limit (16384) 
Processing section "[netlogon]" 
Processing section "[sysvol]" 
Processing section "[share1]" 
Processing section "[share2]" 
Processing section "[SALAMONE_LOCAL]" 
Loaded services file OK. 
WARNING: You have some share names that are longer than 12 characters. 
These may not be accessible to some older clients. 
(Eg. Windows9x, WindowsMe, and smbclient prior to Samba 3.0.) 
Server role: ROLE_ACTIVE_DIRECTORY_DC 
Press enter to see a dump of your service definitions 

[global] 
workgroup = SALAMONE 
realm = SALAMONE.LOCAL 
server string = %L 
server role = active directory domain controller 
passdb backend = samba_dsdb 
syslog = 0 
log file = /var/log/samba/log.%M 
max log size = 2048 
debug prefix timestamp = Yes 
debug class = Yes 
server max protocol = SMB2 
socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192 
dns forwarder = 172.17.100.249 
rpc_server:tcpip = no 
rpc_daemon:spoolssd = embedded 
rpc_server:spoolss = embedded 
rpc_server:winreg = embedded 
rpc_server:ntsvcs = embedded 
rpc_server:eventlog = embedded 
rpc_server:srvsvc = embedded 
rpc_server:svcctl = embedded 
rpc_server:default = external 
idmap config * : backend = tdb 
map archive = No 
map readonly = no 
store dos attributes = Yes 
vfs objects = dfs_samba4, acl_xattr 


[netlogon] 
path = /var/lib/samba/sysvol/salamone.local/scripts 
read only = No 


[sysvol] 
path = /var/lib/samba/sysvol 
read only = No 


[share1] 
path = /data/share1 
read only = No 
aio read size = 16384 
aio write size = 16384 
map acl inherit = Yes 
vfs objects = aio_pthread, acl_xattr 
acl_xattr:ignore system acls = yes 


[share2] 
path = /data/share2 
read only = No 
aio read size = 16384 
aio write size = 16384 
map acl inherit = Yes 
write cache size = 262144 
vfs objects = aio_pthread, acl_xattr 
acl_xattr:ignore system acls = yes 


[SALAMONE_LOCAL] 
path = /data/salamone 
read only = No 
aio read size = 16384 
aio write size = 16384 
map acl inherit = Yes 
write cache size = 262144 
vfs objects = aio_pthread, acl_xattr 
acl_xattr:ignore system acls = yes