[Samba] Samba - slow performance
Jagga Soorma
jagga13 at gmail.com
Tue May 15 00:20:57 UTC 2018
Hello,
We have a small setup where we write files on a Windows system to a
samba mounted location coming from a linux system. This linux system
has NVME disks and 10gige connections. We are getting slow write
performance and our setup should be able to get better write speeds.
I am attaching our config files and hoping someone can assist with
tuning our smb.conf for getting better performance:
--
# cat /etc/samba/smb.conf
[global]
workgroup = XXX
server string = Samba Server %V
security = ADS
realm = XXX.XXX.XXX.XXX
encrypt passwords = yes
netbios name = newark
netbios aliases = newark
map to guest = bad user
dns proxy = no
log level = 1
log file = /var/log/samba/log.%m
max log size = 1000
keepalive = 0
local master = No
domain master = No
strict locking = no
[local_scratch]
follow symlinks = yes
wide links = yes
comment = “local data collection”
path = /local/scratch/
browseable = yes
guest ok = no
writable = yes
valid users = @cfygrp4
create mask = 764
directory mask = 775
force group = cfygrp4
# cat /etc/redhat-release
CentOS release 6.9 (Final)
# rpm -qa | grep -i samba | sort
samba-3.6.23-45.el6_9.x86_64
samba4-libs-4.2.10-12.el6_9.x86_64
samba-client-3.6.23-45.el6_9.x86_64
samba-common-3.6.23-45.el6_9.x86_64
samba-winbind-3.6.23-45.el6_9.x86_64
samba-winbind-clients-3.6.23-45.el6_9.x86_64
**dump of all options via testparm -vs**
# testparm -vs
Load smb config files from /etc/samba/smb.conf
rlimit_max: increasing rlimit_max (1024) to minimum Windows limit (16384)
Processing section “[local_scratch]"
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_DOMAIN_MEMBER
[global]
dos charset = CP850
unix charset = UTF-8
display charset = LOCALE
workgroup = XXX
realm = XXX.XXX.XXX.XXX
netbios name = NEWARK
netbios aliases = newark
netbios scope =
server string = Samba Server %V
interfaces =
bind interfaces only = No
security = ADS
auth methods =
encrypt passwords = Yes
client schannel = Auto
server schannel = Auto
allow trusted domains = Yes
map to guest = Bad User
null passwords = No
obey pam restrictions = No
password server = *
smb passwd file = /var/lib/samba/private/smbpasswd
private dir = /var/lib/samba/private
passdb backend = tdbsam
algorithmic rid base = 1000
root directory =
guest account = nobody
enable privileges = Yes
pam password change = No
passwd program =
passwd chat = *new*password* %n\n *new*password* %n\n *changed*
passwd chat debug = No
passwd chat timeout = 2
check password script =
username map =
password level = 0
username level = 0
unix password sync = No
restrict anonymous = 0
lanman auth = No
ntlm auth = Yes
raw NTLMv2 auth = No
client NTLMv2 auth = Yes
client lanman auth = No
client plaintext auth = No
client use spnego principal = No
send spnego principal = No
preload modules =
dedicated keytab file =
kerberos method = default
map untrusted to domain = No
log level = 2
syslog = 1
syslog only = No
log file = /var/log/samba/log.%m
max log size = 1000
debug timestamp = Yes
debug prefix timestamp = No
debug hires timestamp = Yes
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
log writeable files on exit = 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
allow dcerpc auth level connect = No
use spnego = Yes
client signing = required
client ipc signing = required
server signing = No
client use spnego = Yes
client ldap sasl wrapping = sign
enable asu support = No
svcctl list =
deadtime = 0
getwd cache = Yes
keepalive = 0
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
ctdb timeout = 0
ctdb locktime warn threshold = 0
smb2 max read = 65536
smb2 max write = 65536
smb2 max trans = 65536
smb2 max credits = 8192
load printers = Yes
printcap cache time = 750
printcap name =
cups server =
cups encrypt = No
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 =
username map cache time = 0
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 = No
domain master = No
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 deref = auto
ldap follow referral = Auto
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/lib/samba
state directory = /var/lib/samba
cache directory = /var/lib/samba
pid directory = /var/run
utmp directory =
wtmp directory =
utmp = No
default service =
message command =
get quota command =
set quota command =
remote announce =
remote browse sync =
socket address = 0.0.0.0
nmbd bind explicit broadcast = Yes
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 = No
usershare max shares = 0
usershare owner only = Yes
usershare path = /var/lib/samba/usershares
usershare prefix allow list =
usershare prefix deny list =
usershare template share =
allow insecure wide links = No
async smb echo handler = No
multicast dns register = Yes
panic action =
perfcount module =
host msdfs = Yes
passdb expand explicit = No
idmap backend = tdb
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 max clients = 200
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 sealed pipes = Yes
winbind normalize names = No
winbind rpc only = No
create krb5 conf = Yes
ncalrpc dir = /var/ncalrpc
winbind max domain connections = 1
idmap config * : backend = tdb
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
print notify backchannel = Yes
print ok = 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
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 = No
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 =
--
Thanks in advance for your help!
-J
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