Re: [wgs-assembler-users] S. purpuratus parameters

[mathog <ma...@ca...>]

On 21-Jan-2015 00:39, Ludovic Mallet wrote:
> on debian-like at least, be root:
> 
> #setting the maximum number of file open
> sed -i 's/#<domain>      <type>  <item> <value>/#<domain>      <type>
> <item>         <value>\n\*               soft nofile          
> 65536\n#/'
> /etc/security/limits.conf
> 
> though it might be tweaked for RH flavors.
> Should be run on every node.

Added to limits.conf:
mathog           hard    nofiles         60000
mathog           soft    nofiles         60000

logged out, logged back in, and saw:
% ulimit -Sn
  1024
% ulimit -Hn
  4096
% ulimit -n
  1024
% ulimit -n 60000
  bash: ulimit: open files: cannot modify limit: Operation not permitted
% ulimit -n 4096
% ulimit -n
4096

The 4096 limit seems to be coming from /proc/1/limits which has:
Max open files            1024                 4096                 
files

root can set ulimit -n as high as it wants, while also running in bash.

Not sure where the 4096 being applied to normal processes is coming 
from.

Regards,

David Mathog
ma...@ca...
Manager, Sequence Analysis Facility, Biology Division, Caltech