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Evaluation of OGSA/Globus for Data-Intensive Applications

Preliminary results and current status of testing and evaluating OGSA/Globus for data-intensive applications. Includes testing of gLite components, OMII distribution, and security issues. Details performance, scalability, and future plans.

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Evaluation of OGSA/Globus for Data-Intensive Applications

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  1. OMII evaluation: Preliminary resultsCurrent status of T6.2 Subtask:OGSA/Globus evaluation for data intensive applications coordinator: A. Demichev (SINP MSU), V. Pose (JINR), V. Galaktionov (JINR), in collab. with KIAM RAS CERN-INTAS meeting, 14 March 2005, CERN

  2. Subtask T6.2: OGSA/Globus evaluation for data intensive applications • Based on the experience with OGSA/GT3 evaluation in 2003-2004 (T. Chen et al. “OGSA Globus Tolkit Evaluation Activity at CERN”, in Proc. of ACAT03, NIMA 534 (2004) 80) • Release of the Globus Toolkit 4 is currently scheduled for April 29, 2005 www-unix.globus.org/toolkit/docs/development/4.0-drafts/GT4Facts • Therefore: testing/evaluation of other OGSA/WS systems potentially interesting for LCG/EGEE CERN-INTAS meeting, 14 March 2005, CERN

  3. Subtask T6.2: OGSA/Globus evaluation for data intensive applications (2) • Testing of gLite components: • Fireman (file + replica) and Metadata catalogs (V.Pose) • Workload Management System (V.Galaktionov) • IO-server (A.Demichev) • The work was carried out in framework of the ARDA Team (partially supported by the INTAS-CERN project) and in close collaboration with EGEE JRA1 Team CERN-INTAS meeting, 14 March 2005, CERN

  4. Subtask T6.2: OGSA/Globus evaluation for data intensive applications (3): OMII testing/evaluation • Testing/evaluation of OMII distribution of grid (WS-based) infrastructure (www.omii.ac.uk) is interesting from the point of view of potential use of some its components for future LCG/EGEE MW • By now - two milestones of the plan coordinated with ARDA and JRA1: • Tests to prove correct installation and basic functionality • Performance, scalability and robustness tests CERN-INTAS meeting, 14 March 2005, CERN

  5. Subtask 6.2: OGSA/Globus evaluation for data intensive applications (4): Tests to prove OMII correct installation • Successful: • general installation; • running test scripts (available in OMII dist.); • Tightly bounded to SuSE 9.0 (attempts to install on SuSE 9.2 failed; problems even with SuSE 9.0 updates) • Some problems (Tomcat & Postgresql DB mngt; Windows client conf.) were detected and fixed with the help of OMII support service CERN-INTAS meeting, 14 March 2005, CERN

  6. Subtask 6.2:OGSA/Globus evaluation… (5): Testing the OMII basic functionality • Applications must be pre-installed on the (Job Service) server; an execution of programs prepared on client side is impossible. • No such core services like RB, IS, RC • Management of (grid) accounts is not well scalable, not well suitable for management of large dynamic VOs • Clients must be installed for each user separately (e.g., not under root) • Failed to deploy a new custom service into the OMII container • Report was submitted to JRA1 and OMII Support CERN-INTAS meeting, 14 March 2005, CERN

  7. Subtask 6.2: OGSA/Globus evaluation for data intensive applications (6):Performance, scalability and robustness tests(www.jinr.ru/~vpose/2nd_milestone_of_OMII_evaluation.doc) • The OMII 1.1.1 Job service was found to be robust in a test with 20 concurrent clients • The maximal job submission rate ~ 6 jobs/min • no bulk batch mode for job submission --> problem for submitting large number of jobs • The Data Service was found to work stable with up to 5 concurrent clients and a file size of up to 10MB (no tests beyond this limits yet). CERN-INTAS meeting, 14 March 2005, CERN

  8. Subtask T6.2: OGSA/Globus evaluation for data intensive applications (7):Security issues • currently not supported: • certificates with 4096 bit CA public key (e.g., from Russian CA valid for LCG/EGEE); 2048 bit is supported • proxy certificates • passwords for the Keystore (used to store the certificates) and for private keys of the certificate are stored as a clear text in a text file. CERN-INTAS meeting, 14 March 2005, CERN

  9. Subtask T6.2: OGSA/Globus evaluation for data intensive applications (8): Current work and future plans: • Further testing OMII MW • Studying GT4Beta; • Developing/discussing plans for GT4 testing and evaluation • Waiting for GT4 release... CERN-INTAS meeting, 14 March 2005, CERN

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