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gLite Middleware Architecture

gLite Middleware Architecture. Dusan Vudragovic dusan@phy.bg.ac.yu Scientific Computing Laboratory Institute of Physics Belgrade, Serbia. Set of basic Grid services. Job submission/management File transfer (individual, queued) Database access Data management (replication, metadata)

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gLite Middleware Architecture

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  1. gLite Middleware Architecture Dusan Vudragovic dusan@phy.bg.ac.yu Scientific Computing Laboratory Institute of Physics Belgrade, Serbia

  2. Set of basic Grid services Job submission/management File transfer (individual, queued) Database access Data management (replication, metadata) Monitoring/Indexing system information Introduction to Cluster and Grid Computing in Mechanical Engineering

  3. VOMS (1/4) Virtual Organization Membership Service Introduction to Cluster and Grid Computing in Mechanical Engineering

  4. VOMS (2/4) • Grid Security Infrastructure (GSI) enables secure authentication and communication over an open network • Public key encryption • Digital X.509 certificate • Secure Sockets Layer (SSL) communication protocol • Certification Authority (CA) • grid-mapfile mechanism • LCAS/LCMAPS mechanism allow for a more detailed definition of user privilege • VOMS server example https://voms.phy.bg.ac.yu:8443/voms/aegis Introduction to Cluster and Grid Computing in Mechanical Engineering

  5. VOMS (3/4) Introduction to Cluster and Grid Computing in Mechanical Engineering

  6. VOMS (4/4) ComputingCenter Service Rights VO ComputingCenter • Use delegation to establish dynamic distributed system Introduction to Cluster and Grid Computing in Mechanical Engineering

  7. BDII GStat http://goc.grid.sinica.edu.tw/gstat/ GOC DB https://goc.gridops.org/ Berkely Database Information Index • Information Service (IS) • Globus Monitoring and Discovery Service (MDS) • GLUE Schema • Lightweight Directory Access Protocol (LDAP) • Distinguished Name (DN) • Directory Information Tree (DIT) • Grid Resource Information Server (GRIS) • Relational Grid Monitoring Architecture Introduction to Cluster and Grid Computing in Mechanical Engineering

  8. RGMA Relational Grid Monitoring Architecture • Global distributed relational database • Model is more powerful than the LDAP-based one • Advance query operations • Architecture consists of three major components • Producers - provide the information • Consumers - request the information • Registry - mediates the communication between the Producers and the Consumers EGEE Accounting Portal http://www3.egee.cesga.es/gridsite/accounting/CESGA/egee_view.php Introduction to Cluster and Grid Computing in Mechanical Engineering

  9. WMS & LB • When a user submits a job, JDL options are to: • Specify CE • Allow WMS to choose CE (using optional tags to define requirements) • Specify SE (then WMS finds “nearest” appropriate CE, after interrogating File catalogue service) Run the Workload Management System • To accept job submissions • Dispatch jobs to appropriate Compute Element (CE) • Allow users • To get information about their status • To retrieve their output A configuration file on each UI node determines which WMS node(s) will be used Logging and Bookkeeping service • Who did what and when? • What’s happening to my job? • Usually runs on WMS node Introduction to Cluster and Grid Computing in Mechanical Engineering

  10. CE A CE is a grid batch queuewith a “grid gate” front-end: Information system Job request L&B Logging Loc. Info system Gatekeeper A&A Grid gate node Local resource management system:Condor / PBS / LSF master Homogeneous set of worker nodes Computing Element Introduction to Cluster and Grid Computing in Mechanical Engineering

  11. A&A SE File transfer Requests L&B GridFTP EventLogging Gatekeeper Info system Loc. InfoSystem Disk arrays or tapes Storage Element Introduction to Cluster and Grid Computing in Mechanical Engineering

  12. Other Grid services PX (MyProxy) FTS (File Transfer Service) LFC (Logical File Catalog) AMGA (ARDA Metadata Grid Application) Introduction to Cluster and Grid Computing in Mechanical Engineering

  13. Job Query Publish Storage Element What really happens User interface File catalogue Input “sandbox” WMS DataSets info Information Service Output “sandbox” Job Submit Event SE & CE info Auth. &Auth. Input “sandbox” + Broker Info Job Status Output “sandbox” Job Status Computing Element Logging & Book-keeping Introduction to Cluster and Grid Computing in Mechanical Engineering

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