Re: [Samba] extremely low performance on Samba 4.2.14-Debian
- Date: Thu, 17 Aug 2017 09:00:22 +0100
- From: Rowland Penny via samba <samba@xxxxxxxxxxxxxxx>
- Subject: Re: [Samba] extremely low performance on Samba 4.2.14-Debian
On Wed, 16 Aug 2017 23:28:08 +0200
"L.P.H. van Belle via samba" <samba@xxxxxxxxxxxxxxx> wrote:
> I HATE these auto send keys.. Did i tell that already..
> ( see below )
> > -----Oorspronkelijk bericht-----
> > Van: L.P.H. van Belle [mailto:belle@xxxxxxxxx]
> > Verzonden: woensdag 16 augustus 2017 23:22
> > Aan: 'samba@xxxxxxxxxxxxxxx'
> > Onderwerp: RE: [Samba] extremely low performance on Samba
> > 4.2.14-Debian
> > Hai Emmanuel,
> > But ive re-read the complete thread.
> > Its strange that the old machine is so much faster.
> > In thinging a bit, and it can go two ways..
> > I'm trowing in things i get in my head based on experiance
> > aka wild guesses, but review it i suggest.
> > Samba bug/problem in settings combinations ( or wait for
> > multi threaded samba 4.7. and test that)
> > Hardware/linux (driver/setting) combination, i'll come to
> > that later on..
> > For samba.
> > Can try with the following to see if one of these is slowing
> > things down.
> > In thinking in (kernel higher = better cifs (smb protocol
> > support), and maybe improvements in xfs support (i haven't
> > checked that).
> > And check with modinfo the nic driver.
> > I want to know if it possible to see the (by samba) detected
> > interface speed. ( and mtu/tcp size rwin ).
> > Smb.conf suggestions, and test order.
> > Change:
> > server signing = auto
> > Test,
> > Then again add:
> > ntlm auth = no
> > Test,
> > And im questioning these 2.
> > In global you set.
> > restrict anonymous 2
> > In the share.
> > guest ok = no
> > The google translater makes crap off: This parameter
> > nullifies the benefits of setting restrict anonymous = 2 :-/
> > Are these to settings conflicting or not.. In not sure here.
> > From man smb.conf
> > guest ok (S)
> > If this parameter is yes for a service, then no
> > password is required to connect to the service. Privileges
> > will be those of the guest account.
> > This parameter nullifies the benefits of setting
> > restrict anonymous = 2
> > See the section below on security for more
> > information about this option.
> > Default: guest ok = no
> > About the hardware/linux.
> > Did you install/setup the hardware, (not judging your
> > knowlidge, my thoughts) When you installed it, did you check
> > the pci-e bus and the irq relations in the bios.
> > It is possible, the 40G nic is shareing the bus with the raid
> > 6 contoller.
> > That can slow down things.
> > Bios raid/hdds/mainboard up to date, so changelog review cant harm.
> > Is the nic using firmware?
> > The output of :
> ethtool -i
> So few thing, i can think of i would check.
> Its a pain, special when its far, the samba options are thing you
> might be able to remotely check. Maybe it helps a bit.
I would suggest that the OP tries this smb.conf:
netbios name = storiq-111
server string = %h server (Samba, Debian)
security = ADS
workgroup = TEST
realm = AD.TEST.COM
winbind refresh tickets = yes
winbind use default domain = yes
winbind cache time = 7200
winbind offline logon = yes
idmap config *:backend = tdb
idmap config *:range = 2000-9999
idmap config TEST:backend = rid
idmap config TEST:range = 10000-50000000
template shell = /bin/bash
template homedir = /mnt/raid/%u
log file = /var/log/samba/smbd.log
max log size = 50
vfs objects = acl_xattr
map acl inherit = yes
store dos attributes = yes
# Set ACLs from Windows
comment = Utilisateurs de test_tr
path = /mnt/raid/test_tr
read only = no
It doesn't have any default settings or any settings that might slow
things down (I also do not understand the reason behind having smb.conf
in three sections.)
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