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Installation and Configuration of A-REX

Installation and Configuration of A-REX. Iván Márton (NIIFI) Zsombor Nagy (NIIFI). Components to be installed. GridFTPd Grid Manager / A-REX ARIS. GridFTPd. Receives job description document and proxy-certificate Validates proxy-certificate Accepts the job. Grid Manager / A-REX.

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Installation and Configuration of A-REX

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  1. Installation and Configuration of A-REX Iván Márton (NIIFI) Zsombor Nagy (NIIFI)

  2. Components to be installed • GridFTPd • Grid Manager / A-REX • ARIS EMI Tutorial for Resource Administrators

  3. GridFTPd • Receives job description document and proxy-certificate • Validates proxy-certificate • Accepts the job EMI Tutorial for Resource Administrators

  4. Grid Manager / A-REX • Goes through accepted jobs, starts downloaders for requested files • Caches files and manages the cache • Executes plugins • Transforms job description to LRMS-specific shell-scripts • Submits job to LRMS (SGE, PBS/Torque, SLURM, LoadLeveler, LSF, Condor) • Regularly polls LRMS to see if jobs has completed • Finishes jobs, starts uploaders for output-files • Writes information for URLogger that reports to SGAS • Can provide WS interface to submit and manage jobs and handle related data EMI Tutorial for Resource Administrators

  5. ARIS (Arc Resource Information Service) • ARIS is the local information system • it contains information about cluster, queues, jobs • (started by the ‘grid-infosys’ init script) EMI Tutorial for Resource Administrators

  6. Tutorial environment • OS: SL5 (EMI supported) • Other supported platforms: • Fedora / Redhat • Debian / Ubuntu • Solaris • Mac OS X • Gentoo • etc. EMI Tutorial for Resource Administrators

  7. Discover your disc! • Installed software: /usr/ • Configuration files: e.g. /etc/ • Log files: e.g. /var/log/arc/ • The location of additional files is configurable: e.g. /var/spool/arc • session directory • stores working directories • control directory • job metadata (states, etc.) EMI Tutorial for Resource Administrators

  8. Clients for testing • arcproxy • creating and managing proxy certificates • arcsub • communicate with infosys • do brokering • move input files • submit jobs to cluster • arcstat • query cluster for job status • arccat • print standard output and error of job • arcget • get results of a job and clean from cluster EMI Tutorial for Resource Administrators

  9. Ready… steady… go! http://bit.ly/arc-egi Password: NA59::gf8 Survey: http://www.surveymonkey.com/s/TLQ9BHZ www.nordugrid.org nordugrid-discuss@nordugrid.org EMI Tutorial for Resource Administrators

  10. Thank you!

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