[GE users] How to clear internal hostname cache?

Kim Leng Goh kimleng.goh at gmail.com
Wed Apr 5 10:25:43 BST 2006


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Hi Joe,
  Thanks for your suggestions and help. I've restarted rcsge on the
frontend node and everything's ok now.  Jobs that were running were
not affected.

KL

On 4/5/06, Joe Landman <landman at scalableinformatics.com> wrote:
> Kim Leng Goh wrote:
> > Hi Joe,
> >   Some update. First, thanks for your script. I edited it to become:
> >
> > #!/usr/bin/perl
> > @files = `find /`;
> > foreach $file (@files)
> >  {
> >   chomp($grep = `grep -i --exclude="/dev/*" network-0-0 $file`);
> >   printf "%s\n",$file if ($grep ne "");
> >  }
> >
> >
> > Here's the output at time of writing:
> > /proc/kcore
>
> Ok... this is just the memory of the machine.  You shouldn't be looking
> in there, as you could be regexing the image of the program that
> contains that string.
>
> I would suggest adding --exclude="/proc/*" --exclude="/sysfs/*"
>
> At this point I think you have two options.
>
> Option 1 is, using Rocks methodology, to re-install the head node and
> re-install the compute nodes.
>
> Option 2 is to decommission 5.3, and hand install 6.0u7.
>
> I don't recommend "1" apart from exceptional cases, it usually causes
> far more interruption than you need.  Option "2" is usually much
> easier/safer, and you can (as long as you run them on separate ports,
> and don't use the same compute nodes as execution hosts) run two
> schedulers at once for a cutover to the new installation.  Given the
> issues in the Rocks SGE (qrsh not working among other bits), I would
> recommend "2".
>
> Joe
>
> --
>
> Joseph Landman, Ph.D
> Founder and CEO
> Scalable Informatics LLC,
> email: landman at scalableinformatics.com
> web  : http://www.scalableinformatics.com
> phone: +1 734 786 8423
> fax  : +1 734 786 8452 or +1 866 888 3112
> cell : +1 734 612 4615
>
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