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