Joe - good ideas! As a debugging step we even ran the LM daemon as root, ulimit -a reports a file limit of 65535...
It's a permanently running daemon, not going through xinetd and it, annoyingly, produces no logs or sends anything to syslog. Thanks for your thoughts... Simon -----Original Message----- From: Joe Landman [mailto:[EMAIL PROTECTED] Sent: 2007 Jun 17 2:52 PM To: Galton, Simon Cc: '[email protected]' Subject: Re: [Beowulf] Concurrently open sockets limit on Linux system Hi Simon Galton, Simon wrote: > (according lsof on the system running the license manager) seems to hold > a socket open during the duration of the job. > > We want to run a couple of hundred of these jobs on our cluster, but > after job 126 the client can no longer connect to the license manager. This seems to suggest somewhere that there is a 128 socket limit on the service. How is the license manager run? What does limit or ulimit -a tell you for the user that the license manager runs as? Any notes in system logs? > The server hosting the license manager is otherwise fine, and you can > continue to perform network-based operations on and against it... > > The vendor feels that they have not coded a specific limit; I'm > wondering if it's file descriptors or somesuch. I raised the limit of > FDs on the system to 65000+ and verified that the change took effect; no > change to the applications behaviour. It's a c-based app, compiled with > gcc on a Fedora Core 6 system, I believe. Doesn't sound like an FD limit, but as a socket limit. Older inetd's had something like 20-40 connections per process. If you are serving this through xinetd or similar, you might be able to raise these limits. Joe > > Any thoughts? > > Simon > > > > > CONFIDENTIAL AND PRIVILEGED INFORMATION NOTICE > > This e-mail, and any attachments, may contain information that > is confidential, subject to copyright, or exempt from disclosure. > Any unauthorized review, disclosure, retransmission, > dissemination or other use of or reliance on this information > may be unlawful and is strictly prohibited. > > AVIS D'INFORMATION CONFIDENTIELLE ET PRIVILÉGIÉE > > Le présent courriel, et toute pièce jointe, peut contenir de > l'information qui est confidentielle, régie par les droits > d'auteur, ou interdite de divulgation. Tout examen, > divulgation, retransmission, diffusion ou autres utilisations > non autorisées de l'information ou dépendance non autorisée > envers celle-ci peut être illégale et est strictement interdite. > > > ------------------------------------------------------------------------ > > _______________________________________________ > Beowulf mailing list, [email protected] > To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf -- Joseph Landman, Ph.D Founder and CEO Scalable Informatics LLC, email: [EMAIL PROTECTED] web : http://www.scalableinformatics.com http://jackrabbit.scalableinformatics.com phone: +1 734 786 8423 fax : +1 866 888 3112 cell : +1 734 612 4615 CONFIDENTIAL AND PRIVILEGED INFORMATION NOTICE This e-mail, and any attachments, may contain information that is confidential, subject to copyright, or exempt from disclosure. Any unauthorized review, disclosure, retransmission, dissemination or other use of or reliance on this information may be unlawful and is strictly prohibited. AVIS D'INFORMATION CONFIDENTIELLE ET PRIVILÉGIÉE Le présent courriel, et toute pièce jointe, peut contenir de l'information qui est confidentielle, régie par les droits d'auteur, ou interdite de divulgation. Tout examen, divulgation, retransmission, diffusion ou autres utilisations non autorisées de l'information ou dépendance non autorisée envers celle-ci peut être illégale et est strictement interdite.
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