[Samba] file share slowdown
James Hurlburt
hurlburtjl at gmail.com
Mon Mar 7 16:47:26 MST 2011
Sirs:
We are a Vinyl window manufacturing plant in central Washington State,
USA. We have been running linux with samba for file and print
services for eight or ten years now.
Much of our production software is in house, and built on CA clipper
5.2, using dbf files as the primary data store. The clipper dbf file
format supports both record locking and file locking along with shared
file access. This worked very well on Novell netware and was working
ok on samba 3.0.23.
We had a samba server running for several years. I believe it was
6.06 with samba 3.0.23 although I'm no longer certain of either of
those two versions.
We have about six stations running dos 6.22 and four running windows
98. They are part of production machines, and changing the operating
system is not an option.
I had managed to tweak the samba config file so that file sharing
wasn't a big problem, the system was responsive and running fairly
smoothly.
We have numerous clients running winXP with no obvious problems.
We are, and have been running the Samba server with User validation.
We are part of a windows domain, but haven't figured out a way to have
the dos machines login as domain members. The xp stations use the
domain for authentication, then we maintain a parallel set of logins
on the linux box and samba file server. Again, this was working OK,
pre crash.
A month or so ago, we lost two hard drives on the file server and had
to do a rebuild. I had tried to update the samba version a time or
two in the interem and failed. I couldn't get the dos machines to
connect to samba and access the necessary data files. One gentleman
on the samba list said that this was a problem with lanman protocol,
and aparently fixed it. Samba 3.4.7 allows logins file access without
any problems.
The current problem is that shared clipper files are very slow. It
appears as if record locking instead of file locking isn't being
recognized by Samba. When production is going, 20 second delays for
file access are common. This was not true six weeks ago before the
server crash.
I have studied on the smb.conf file at great length, trying several
variations without sucess.
Any advice or hints of what to study now would be most welcome,
Jim Hurlburt
Atrium Windows and Doors Northwest.
Yakima, WA USA
The global portion plus the mains share of the smb.conf file in
verbose mode.
*******************************************************
# Samba config file created using SWAT
# from UNKNOWN (10.23.0.118)
# Date: 2011/03/07 15:23:58
[global]
dos charset = CP850
unix charset = UTF-8
display charset = LOCALE
workgroup = ATRIUM-DW
realm =
netbios name = BBI-SAM-1-SRV
netbios aliases =
netbios scope =
server string = %h server (Samba, Ubuntu)
interfaces =
bind interfaces only = No
security = USER
auth methods =
encrypt passwords = Yes
update encrypted = No
client schannel = Auto
server schannel = Auto
allow trusted domains = Yes
map to guest = Bad User
null passwords = No
obey pam restrictions = Yes
password server = *
smb passwd file = /etc/samba/smbpasswd
private dir = /etc/samba
passdb backend = tdbsam
algorithmic rid base = 1000
root directory =
guest account = nobody
enable privileges = Yes
pam password change = Yes
passwd program = /usr/bin/passwd %u
passwd chat = *Enter\snew\s*\spassword:* %n\n
*Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .
passwd chat debug = No
passwd chat timeout = 2
check password script =
username map =
password level = 0
username level = 0
unix password sync = Yes
restrict anonymous = 0
lanman auth = Yes
ntlm auth = Yes
client NTLMv2 auth = No
client lanman auth = No
client plaintext auth = No
preload modules =
dedicated keytab file =
kerberos method = default
map untrusted to domain = No
log level = 0
syslog = 0
syslog only = No
log file = /var/log/samba/log.%m
max log size = 1000
debug timestamp = Yes
debug prefix timestamp = No
debug hires timestamp = No
debug pid = No
debug uid = No
debug class = No
enable core files = Yes
smb ports = 445 139
large readwrite = Yes
max protocol = NT1
min protocol = CORE
min receivefile size = 0
read raw = Yes
write raw = Yes
disable netbios = No
reset on zero vc = No
acl compatibility = auto
defer sharing violations = Yes
nt pipe support = Yes
nt status support = Yes
announce version = 4.9
announce as = NT
max mux = 50
max xmit = 16644
name resolve order = lmhosts wins host bcast
max ttl = 259200
max wins ttl = 518400
min wins ttl = 21600
time server = No
unix extensions = Yes
use spnego = Yes
client signing = auto
server signing = No
client use spnego = Yes
client ldap sasl wrapping = plain
enable asu support = No
svcctl list =
deadtime = 15
getwd cache = Yes
keepalive = 300
lpq cache time = 30
max smbd processes = 0
paranoid server security = Yes
max disk size = 0
max open files = 16384
socket options = TCP_NODELAY
use mmap = Yes
hostname lookups = No
name cache timeout = 660
ctdbd socket =
cluster addresses =
clustering = No
load printers = Yes
printcap cache time = 750
printcap name =
cups server =
cups connection timeout = 30
iprint server =
disable spoolss = No
addport command =
enumports command =
addprinter command =
deleteprinter command =
show add printer wizard = Yes
os2 driver map =
mangling method = hash2
mangle prefix = 1
max stat cache size = 256
stat cache = Yes
machine password timeout = 604800
add user script =
rename user script =
delete user script =
add group script =
delete group script =
add user to group script =
delete user from group script =
set primary group script =
add machine script =
shutdown script =
abort shutdown script =
username map script =
logon script =
logon path = \\%N\%U\profile
logon drive =
logon home = \\%N\%U
domain logons = No
init logon delayed hosts =
init logon delay = 100
os level = 20
lm announce = Auto
lm interval = 60
preferred master = No
local master = Yes
domain master = Auto
browse list = Yes
enhanced browsing = Yes
dns proxy = No
wins proxy = No
wins server =
wins support = No
wins hook =
kernel oplocks = Yes
lock spin time = 200
oplock break wait time = 0
ldap admin dn =
ldap delete dn = No
ldap group suffix =
ldap idmap suffix =
ldap machine suffix =
ldap passwd sync = no
ldap replication sleep = 1000
ldap suffix =
ldap ssl = start tls
ldap ssl ads = No
ldap timeout = 15
ldap connection timeout = 2
ldap page size = 1024
ldap user suffix =
ldap debug level = 0
ldap debug threshold = 10
eventlog list =
add share command =
change share command =
delete share command =
preload =
lock directory = /var/run/samba
state directory = /var/lib/samba
cache directory = /var/cache/samba
pid directory = /var/run/samba
utmp directory =
wtmp directory =
utmp = No
default service = global
message command =
get quota command =
set quota command =
remote announce =
remote browse sync =
socket address = 0.0.0.0
homedir map = auto.home
afs username map =
afs token lifetime = 604800
log nt token command =
time offset = 0
NIS homedir = No
registry shares = No
usershare allow guests = Yes
usershare max shares = 100
usershare owner only = Yes
usershare path = /var/lib/samba/usershares
usershare prefix allow list =
usershare prefix deny list =
usershare template share =
panic action = /usr/share/samba/panic-action %d
perfcount module =
host msdfs = Yes
passdb expand explicit = No
idmap backend = tdb
idmap alloc backend =
idmap cache time = 604800
idmap negative cache time = 120
idmap uid =
idmap gid =
template homedir = /home/%D/%U
template shell = /bin/false
winbind separator = \
winbind cache time = 300
winbind reconnect delay = 30
winbind enum users = No
winbind enum groups = No
winbind use default domain = No
winbind trusted domains only = No
winbind nested groups = Yes
winbind expand groups = 1
winbind nss info = template
winbind refresh tickets = No
winbind offline logon = No
winbind normalize names = No
winbind rpc only = No
comment =
path =
username =
invalid users =
valid users =
admin users =
read list =
write list =
printer admin =
force user =
force group =
read only = Yes
acl check permissions = Yes
acl group control = No
acl map full control = Yes
create mask = 0744
force create mode = 00
security mask = 0777
force security mode = 00
directory mask = 0755
force directory mode = 00
directory security mask = 0777
force directory security mode = 00
force unknown acl user = No
inherit permissions = No
inherit acls = No
inherit owner = No
guest only = No
administrative share = No
guest ok = No
only user = No
hosts allow =
hosts deny =
allocation roundup size = 1048576
aio read size = 0
aio write size = 0
aio write behind =
ea support = No
nt acl support = Yes
profile acls = No
map acl inherit = No
afs share = No
smb encrypt = auto
block size = 1024
change notify = Yes
directory name cache size = 100
kernel change notify = Yes
max connections = 0
min print space = 0
strict allocate = No
strict sync = No
sync always = No
use sendfile = No
write cache size = 0
max reported print jobs = 0
max print jobs = 1000
printable = No
printing = cups
cups options =
print command =
lpq command = %p
lprm command =
lppause command =
lpresume command =
queuepause command =
queueresume command =
printer name =
use client driver = No
default devmode = Yes
force printername = No
printjob username = %U
default case = lower
case sensitive = Auto
preserve case = Yes
short preserve case = Yes
mangling char = ~
hide dot files = Yes
hide special files = No
hide unreadable = No
hide unwriteable files = No
delete veto files = No
veto files =
hide files =
veto oplock files =
map archive = Yes
map hidden = No
map system = No
map readonly = yes
mangled names = Yes
store dos attributes = No
dmapi support = No
browseable = Yes
access based share enum = No
browsable = Yes
blocking locks = Yes
csc policy = manual
fake oplocks = No
locking = Yes
oplocks = Yes
level2 oplocks = Yes
oplock contention limit = 2
posix locking = Yes
strict locking = Auto
share modes = Yes
dfree cache time = 0
dfree command =
copy =
preexec =
preexec close = No
postexec =
root preexec =
root preexec close = No
root postexec =
available = Yes
volume =
fstype = NTFS
set directory = No
wide links = No
follow symlinks = Yes
dont descend =
magic script =
magic output =
delete readonly = No
dos filemode = No
dos filetimes = Yes
dos filetime resolution = No
fake directory create times = No
vfs objects =
msdfs root = No
msdfs proxy =
[bestbilt]
path = /atrium/bestbilt
valid users = @users
admin users = @admin
force group = users
read only = No
create mask = 0664
force create mode = 0664
directory mask = 0775
force directory mode = 0775
strict locking = No
fstype = FAT
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