Samba -facing problem file lock on samba

[Mohamad Khir]

Clearcase is the major application in our environment. Recently we have upgraded my samba version from 2.0.7 to version 2.1.12. After upgraded samba, we are facing problem with file locks on samba. Most of the time hitting 100% and result users can’t use the application.



Server OS : HP-UX 11.00
Nflocks parameter value: 1024

[Sameer_Nirmal]

Hi,
I guess in the previous version 2.0.7 , there was explicit requirement of configuration for nflocks parameter.
But in the recent versions , this parameter is required to configure explicitly.

Generally the following equation is followed for this parameter
nflocks = 10 x max_connected_clients

I guess if there are around 100 clients , then the current value 1024 could be easily passed out.

So depending on the number of clients you have , increase this value , rebuild the kernel and restart the sytem.

[Mohamad Khir]

Thanks for your help

[Darren Prior]

Hi,

I think there were some significant changes to Samba after 2.0.7 which required greater resources - this is definitely covered in the CIFS manuals at http://docs.hp.com and refers to A.01.08 and above. I would point out that 2.1.12 is an old version, the latest CIFS for 11.00 from HP is based on a 2.2 release of Samba.

regards,

Darren.

[eric roseme]

As long as you are changing kernel parms, these should be set (for 2.2.12, which what I assume you mean. There never was a 2.1.12):

nflocks
(10*maximum smbd)+(other apps + system)
example 1000 connected clients and baseline NFS system
(10*1000)+(2048) = 12048
nfile
((23+opens_per_smbd)*maximum smbd)+(other apps+system))
example 1000 connected clients and baseline NFS system
((23+7)*1000)+(8192)=38192
nproc
(maximum smbd)+(other apps+system)
example 1000 connected clients and baseline NFS system
(1000)+(1024)=2024

Eric Roseme
Hewlett-Packard

[Mohamad Khir]

Thanks for any advice....
Regards
Khir