VO Frontend

Installed on voatlas195. Random commands(to explain more later)
$ voms-proxy-init -cert /etc/grid-security/hostcert.pem_a -key /etc/grid-security/hostkey.pem_a -valid 800:00 -out /data/atlpan/autopyfactory/proxy/host

Reconfigure and restart the frontend after a change to the xml config file. The PATH manipulation picks up the native python to avoid and error (No module named M2Crypto).

export PATH=/usr/bin:$PATH
/data/atlpan/glideinWMS/frontstage/frontend_ATLAS-voatlas195-v1_0/frontend_startup reconfig /data/atlpan/glideinWMS/frontstage/instance_v1_0.cfg/frontend.xml


Condor Batch System

Central services are installed on voatlas92: Negotiator and Collector. There is a 1-level hierarchy of Collectors in order to handle authentication load from many starting glideins. It is an approximation to mult-threading the Collector, and works because much of the auth time is in WAN delays. Collector on non-standard port 20618, because default one 9618 was firewalled.

Scalability Notes

  • /proc/sys/net/ipv4/netfilter/ip_conntrack_max should be increase from the 64k default, or turn off iptables.
  • Increase the max files per process for the Collectors 8in init.d script or otherwise) and run more secondary collectors

The Schedd is on voatlas195. it is not the root installed version, but one recommended by gildeinWMS support. Setup env with

source /data/atlpan/glideinWMS/glidecondor/

This needs the SHARED_PORT config or it runs out of ports. It runs as atlpan so that the mapping to canonical user works - this is needed for the fairshare. So far it is only between analysis and production, and the smaller EP is better.

$ condor_userprio 
Last Priority Update:  4/11 10:36
User Name                           Priority 
------------------------------      ---------           823.59           1343.73

Major updates:
-- RodneyWalker - 10-Apr-2012

Responsible: RodneyWalker

Never reviewed

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Topic revision: r4 - 2012-05-02 - RodneyWalker
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