SOLVED: Samba speed so slow. History one of not a software problem.

pentagrammer · 27. April 2020

I use OMV from 2.x till atm.

My NAS configuration: AMD C60 + 8GB RAM + 4x2TB (RAID5) + 2x4TB(mirror)+SSD_32GB(system)+Gigabit ethernet

1 week ago I was upgrade my NAS from latest OMV 4 to OMV5.4.2 for get posiibillity to get updates.

In my home net live several devices with windows 7, android and with linux onboard.

After upgrade process samba speed was decreased. Write speed was before upgrading: 60-70MB/s, after 7-10MB/s, reading speed was 70-90MB/s, after 12-17MB/s

Any my changes in special options in samba/CIFS setup in OMV have no success. Differents speed after changes +/-2MB/s

O'cource before maked changes in special options I was read topics about samba speed tuning here, but it have no results.

Yesterday I was reinstall OMV5.4.2 on my NAS. And Samba speed stay so slow.

Please heeeeeelp, I think it can linked with samba version, but I possible have mistake with that. I have no any changes in my net, only OMV version changed.

auanasgheps · 27. April 2020

That's weird. What SMB options are you using?

What is the CPU % usage when transferring files? Also makes these tests with a large file (>2GB) if possible.

pentagrammer · 27. April 2020

For check speed Im try to copiing file with size 1.2GB:

As you can see - really speed nearly 10Mb/s.

Also I was checked write speed on shared from console on the server (via dd and file size ~1Gb) - results: write speed between 120Mb/s -180Mb/s.

Now I planned check the net interface speed via ipref...

I still have not any idea...

auanasgheps · 27. April 2020

Check all interfaces are linked to 1000 Mbps.

Check server CPU utilization when copying the file.

pentagrammer · 27. April 2020

Samba params at the moment (Part1):

Code

# Global parameters
[global]
abort shutdown script =
add group script =
add machine script =
addport command =
addprinter command =
add share command =
add user script =
add user to group script =
afs token lifetime = 604800
afs username map =
aio max threads = 100
algorithmic rid base = 1000
allow dcerpc auth level connect = No
allow dns updates = secure only
allow insecure wide links = No
allow nt4 crypto = No
allow trusted domains = Yes
allow unsafe cluster upgrade = No
apply group policies = No
async smb echo handler = No
auth event notification = No
auto services =
binddns dir = /var/lib/samba/bind-dns
bind interfaces only = No
browse list = Yes
cache directory = /var/cache/samba
change notify = Yes
change share command =
check password script =
cldap port = 389
client ipc max protocol = default
client ipc min protocol = default
client ipc signing = default
client lanman auth = No
client ldap sasl wrapping = sign
client max protocol = default
client min protocol = CORE
client NTLMv2 auth = Yes
client plaintext auth = No
client schannel = Yes
client signing = default
client use spnego principal = No
client use spnego = Yes
cluster addresses =
clustering = No
config backend = file
config file =
create krb5 conf = Yes
ctdbd socket =
ctdb locktime warn threshold = 0
ctdb timeout = 0
cups connection timeout = 30
cups encrypt = No
cups server =
dcerpc endpoint servers = epmapper, wkssvc, rpcecho, samr, netlogon, lsarpc, drsuapi, dssetup, unixinfo, browser, eventlog6, backupkey, dnsserver
deadtime = 0
debug class = No
debug hires timestamp = Yes
debug pid = No
debug prefix timestamp = No
debug uid = No
dedicated keytab file =
default service =
defer sharing violations = Yes
delete group script =
deleteprinter command =
delete share command =
delete user from group script =
delete user script =
dgram port = 138
disable netbios = No
disable spoolss = Yes
dns forwarder =
dns proxy = No
dns update command = /usr/sbin/samba_dnsupdate
dns zone scavenging = No
domain logons = No
domain master = Auto
dos charset = CP850
dsdb event notification = No
dsdb group change notification = No
dsdb password event notification = No
enable asu support = No
enable core files = Yes
enable privileges = Yes
encrypt passwords = Yes
enhanced browsing = Yes
enumports command =
eventlog list =
get quota command =
getwd cache = Yes
gpo update command = /usr/sbin/samba-gpupdate
guest account = nobody
homedir map = auto.home
host msdfs = Yes
hostname lookups = No
idmap backend = tdb
idmap cache time = 604800
idmap gid =
idmap negative cache time = 120
idmap uid =
include system krb5 conf = Yes
init logon delay = 100
init logon delayed hosts =
interfaces =
iprint server =
keepalive = 300
kerberos encryption types = all
kerberos method = default
kernel change notify = Yes
kpasswd port = 464
krb5 port = 88
lanman auth = No
large readwrite = Yes
ldap admin dn =
ldap connection timeout = 2
ldap debug level = 0
ldap debug threshold = 10
ldap delete dn = No
ldap deref = auto
ldap follow referral = Auto
ldap group suffix =
ldap idmap suffix =
ldap machine suffix =
ldap page size = 1000
ldap passwd sync = no
ldap replication sleep = 1000
ldap server require strong auth = Yes
ldap ssl = start tls
ldap ssl ads = No
ldap suffix =
ldap timeout = 15
ldap user suffix =
lm announce = Auto
lm interval = 60
load printers = No
local master = Yes
lock directory = /var/run/samba
lock spin time = 200
log file = /var/log/samba/log.%m
logging = syslog
log level = 2
log nt token command =
logon drive =
logon home = \\%N\%U
logon path = \\%N\%U\profile
logon script =
log writeable files on exit = No
lpq cache time = 30
lsa over netlogon = No
machine password timeout = 604800
mangle prefix = 1
mangling method = hash2
map to guest = Never
max disk size = 0
max log size = 1000
max mux = 50
max open files = 16384
max smbd processes = 0
max stat cache size = 256
max ttl = 259200
max wins ttl = 518400
max xmit = 16644
mdns name = netbios
message command =
min receivefile size = 0
min wins ttl = 21600
mit kdc command =
multicast dns register = No
name cache timeout = 660
name resolve order = lmhosts wins host bcast
nbt client socket address = 0.0.0.0
nbt port = 137
ncalrpc dir = /var/run/samba/ncalrpc
netbios aliases =
netbios name = MYNAS
netbios scope =
neutralize nt4 emulation = No
NIS homedir = No
nmbd bind explicit broadcast = Yes
nsupdate command = /usr/bin/nsupdate -g
ntlm auth = ntlmv2-only
nt pipe support = Yes
ntp signd socket directory = /var/lib/samba/ntp_signd
nt status support = Yes
null passwords = No
obey pam restrictions = No
old password allowed period = 60
oplock break wait time = 0
os2 driver map =
os level = 20
pam password change = Yes
panic action = /usr/share/samba/panic-action %d
passdb backend = tdbsam
passdb expand explicit = No
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
passwd program = /usr/bin/passwd %u
password hash gpg key ids =
password hash userPassword schemes =
password server = *
perfcount module =
pid directory = /var/run/samba
preferred master = Auto
prefork children = 1
preload modules =
printcap cache time = 750
printcap name = /dev/null
private dir = /var/lib/samba/private

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pentagrammer · 27. April 2020

Part2:

Code

raw NTLMv2 auth = No
read raw = Yes
realm =
registry shares = No
reject md5 clients = No
reject md5 servers = No
remote announce =
remote browse sync =
rename user script =
require strong key = Yes
reset on zero vc = No
restrict anonymous = 0
rndc command = /usr/sbin/rndc
root directory =
rpc big endian = No
rpc server dynamic port range = 49152-65535
rpc server port = 0
samba kcc command = /usr/sbin/samba_kcc
security = AUTO
server max protocol = SMB3
server min protocol = LANMAN1
server multi channel support = No
server role = auto
server schannel = Yes
server services = s3fs, rpc, nbt, wrepl, ldap, cldap, kdc, drepl, winbindd, ntp_signd, kcc, dnsupdate, dns
server signing = default
server string = %h server
set primary group script =
set quota command =
share backend = classic
show add printer wizard = Yes
shutdown script =
smb2 leases = Yes
smb2 max credits = 8192
smb2 max read = 8388608
smb2 max trans = 8388608
smb2 max write = 8388608
smbd profiling level = off
smb passwd file = /etc/samba/smbpasswd
smb ports = 445 139
socket options = TCP_NODELAY IPTOS_LOWDELAY
spn update command = /usr/sbin/samba_spnupdate
stat cache = Yes
state directory = /var/lib/samba
svcctl list =
syslog = 1
syslog only = No
template homedir = /home/%D/%U
template shell = /bin/false
time server = Yes
timestamp logs = Yes
tls cafile = tls/ca.pem
tls certfile = tls/cert.pem
tls crlfile =
tls dh params file =
tls enabled = Yes
tls keyfile = tls/key.pem
tls priority = NORMAL:-VERS-SSL3.0
tls verify peer = as_strict_as_possible
unicode = Yes
unix charset = UTF-8
unix extensions = Yes
unix password sync = No
use mmap = Yes
username level = 0
username map =
username map cache time = 0
username map script =
usershare allow guests = No
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 =
utmp = No
utmp directory =
web port = 901
winbind cache time = 300
winbindd socket directory = /var/run/samba/winbindd
winbind enum groups = No
winbind enum users = No
winbind expand groups = 0
winbind max clients = 200
winbind max domain connections = 1
winbind nested groups = Yes
winbind normalize names = No
winbind nss info = template
winbind offline logon = No
winbind reconnect delay = 30
winbind refresh tickets = No
winbind request timeout = 60
winbind rpc only = No
winbind scan trusted domains = Yes
winbind sealed pipes = Yes
winbind separator = \
winbind use default domain = No
wins hook =
wins proxy = No
wins server =
wins support = Yes
workgroup = HOME
write raw = Yes
wtmp directory =
fruit:aapl = yes
idmap config * : backend = tdb
access based share enum = No
acl allow execute always = No
acl check permissions = Yes
acl group control = No
acl map full control = Yes
administrative share = No
admin users =
afs share = No
aio read size = 16384
aio write behind =
aio write size = 16384
allocation roundup size = 1048576
available = Yes
blocking locks = Yes
block size = 1024
browseable = Yes
case sensitive = Auto
check parent directory delete on close = No
comment =
copy =
create mask = 0777
csc policy = manual
cups options =
default case = lower
default devmode = Yes
delete readonly = No
delete veto files = No
dfree cache time = 0
dfree command =
directory mask = 0777
directory name cache size = 100
dmapi support = No
dont descend =
dos filemode = No
dos filetime resolution = No
dos filetimes = Yes
durable handles = Yes
ea support = Yes
fake directory create times = No
fake oplocks = No
follow symlinks = Yes
force create mode = 0000
force directory mode = 0000
force group =
force printername = No
force unknown acl user = No
force user =
fstype = NTFS
guest ok = No
guest only = No
hide dot files = Yes
hide files =
hide special files = No
hide unreadable = No
hide unwriteable files = No
hosts allow =
hosts deny =
include =
inherit acls = No
inherit owner = no
inherit permissions = No
invalid users =
kernel oplocks = No
kernel share modes = Yes
level2 oplocks = Yes
locking = Yes
lppause command =
lpq command = %p
lpresume command =
lprm command =
magic output =
magic script =
mangled names = yes
mangling char = ~
map acl inherit = No
map archive = Yes
map hidden = No
map readonly = no
map system = No
max connections = 0
max print jobs = 1000
max reported print jobs = 0
min print space = 0
msdfs proxy =
msdfs root = No
msdfs shuffle referrals = No
nt acl support = Yes
ntvfs handler = unixuid, default
oplocks = Yes
path =
posix locking = Yes
postexec =
preexec =
preexec close = No
preserve case = Yes
printable = No
print command =
printer name =
printing = bsd
printjob username = %U
print notify backchannel = No
queuepause command =
queueresume command =
read list =
read only = Yes
root postexec =
root preexec =
root preexec close = No
short preserve case = Yes
smb encrypt = default
spotlight = No
store dos attributes = Yes
strict allocate = No
strict locking = Auto
strict rename = No
strict sync = Yes
sync always = No
use client driver = No
use sendfile = Yes
valid users =
veto files =
veto oplock files =
vfs objects =
volume =
wide links = No
write cache size = 0
write list =

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pentagrammer · 27. April 2020

Ethernet interface:

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pentagrammer · 27. April 2020

CPU & memory load:

pentagrammer · 27. April 2020

Stats by OMV under copiing from WS on OMV disk process:

CPU load: Load Average: Memory usage: Network interface load:

pentagrammer · 27. April 2020

Zitat von auanasgheps

Check all interfaces are linked to 1000 Mbps.
Check server CPU utilization when copying the file.

2auanasgheps: Damn! You're right!!!! Problem was not with OMV server!!!

I'm reread yours post and was try to check cable from my test PC - damn - net card of my test PC set speed to 100Mbit/s - I don't how it - but it is fact. After changed patchcord all seems OK - samba write speed between 60-75MB/s - as was before upgrading.

Thank you so much!

auanasgheps · 27. April 2020

Great to know the fix was easy. Ethernet isn't perfect: sometimes is the cable sometimes the plug. Happened to everybody, me included.

I had the suspect the issue could have been the connection because the speed was not a "random" value but capped to <10 MB/s.

I am also confident you could get higher speeds: the CPU is moderately used during a transfer, but things could be better. How's doing the CPU when transferring at 70 MB/s?

pentagrammer · 27. April 2020

System loads when copiing on OMV server file 6.5GB with via gigabit ethernet with speed 65-72MB/sec

Htop1:

Htop2:

OMV CPU LOAD:

OMV Memory Usage:

OMV Ethernet Interface:

OMV Load Average:

As we can see - CPU on internal gigabit ethernet not enought. I guess internal gigabit put huge load on CPU. May be intel net card would be better results, but I can't check - I haven't empty PCI-ex slot, in slot SATA extender card installed.

auanasgheps · 28. April 2020

Wow, your system is dying during copying. I think you'll have to settle with this until you change the whole platform.

My system (signature below) has only 15% of CPU used when copying over gigabit Ethernet at 110 MB/s.

pentagrammer · 28. April 2020

Zitat von auanasgheps

Wow, your system is dying during copying. I think you'll have to settle with this until you change the whole platform.
My system (signature below) has only 15% of CPU used when copying over gigabit Ethernet at 110 MB/s.

I'm not offten copiing files to OMV server, usually OMV used as storage for reading via dlna or some else. Load average small than 2 - it's not dying system, short load it is not a death That situation talk about only one: I can get from my system all perfomance what system have. As I wrote before - changing netcard can up net speed and take lower load on CPU. Internal net card working mostly in driver (software netcard), if in system would be install hardware netcard like Intel Pila series orIntel 8257x series - the system get lower CPU load during copiing process.

... My NAS older 7 years first system on it was be a FreeNas. So NAS on OMV living from 2.x version till atm. Give us all what we 're need, not planed to change platform at nearest time.

SOLVED: Samba speed so slow. History one of not a software problem.

pentagrammer 27. April 2020

pentagrammer 27. April 2020

pentagrammer 27. April 2020

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