[Samba] Large Delays in Samba Responses
jra at samba.org
Tue Sep 15 17:53:28 UTC 2020
On Tue, Sep 15, 2020 at 09:35:30AM +1000, Matthew Jurgens via samba wrote:
> From time to time I get applications that use data on a Samba share locking
> up for long periods. Sometimes minutes.
> I am using a Windows 10 client and Samba 4.12.5 on Fedora 32
> smb.conf is pretty simple:
> // log file = /var/log/samba/%m.log//
> // writeable = yes//
> // workgroup = HOME//
> // hosts allow = 192.168.2.0/24 //
> // security = user//
> // passdb backend = tdbsam//
> // unix extensions = no//
> // load printers = no//
> // wide links = yes//
> // # trying disabling oplocks to see if that stops my hanging/delay
> // oplocks = no//
> // socket options = TCP_NODELAY IPTOS_LOWDELAY SO_RCVBUF=65536
> SO_SNDBUF=65536 SO_KEEPALIVE//
> // # needed for DDWRT routers//
> // ntlm auth = yes/
> with shares like:
> // path = /opt/msm//
> // create mask = 0765//
> // comment = Minecraft/
> Changing oplocks did not help.
> I've done some packet captures and they all look similar to this one:
> Here you can see long delays where nothing is happening on the network, and
> the server is not resource constrained. While this is happening applications
> that are trying to use files on the share lock up. In the screenshot shown,
> there was some operations on an "opencv" file which was not even open or
> being touched by the application that was hanging. In fact, it would have
> been days ago since I last used the file in a different application.
> smbstatus at the time did not list this file at all.
> I had this problem years ago and it just disappeared and it was fine for
> years, now it is back and don't know what it is.
> Any ideas? Any troubleshooting steps I can take?
This is from a Windows client, yes ?
Do you, or have you ever had the Windows Microsoft provided NFS client
loaded on that client ?
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