1. Grid Research & educatiOn group @ IoWa (GROW) ITS Academic Technologies – Research Services The University of Iowa Iowa City, IA 52242, USA May 17, 2006 Using MonALISA Repository Anand Padmanabhan, Shaowen Wang

2. Introduction Agent- & service-based Agent- & service-based Monitoring repositories for VOs Monitoring repositories for VOs OSG Repositories OSG Repositories –Production http://grid02.uits.indiana.edu:8080/ http://grid02.uits.indiana.edu:8080/ –ITB http://madman.uits.indiana.edu:8888/ http://madman.uits.indiana.edu:8888/ http://madman.uits.indiana.edu:8888/ This presentation is based on the information from the MonALISA project This presentation is based on the information from the MonALISA project –We don’t represent the official view of MonALISA project i.e., any mistakes are ours i.e., any mistakes are ours

3. Repository Publish-subscribe model Publish-subscribe model Active services are discovered using JINI Active services are discovered using JINI Received values can be stored in databases Received values can be stored in databases –MySQL, PostgreSQL

4. Repository – cont Repositories subscribe to a set of parameters from services Repositories subscribe to a set of parameters from services –Subscription is specified in the following pattern: Farm / Cluster / Node / start_time / end_time / function_list. Subscription and storage are configured by Subscription and storage are configured by –MLrepository/JStoreClient/conf/App.properties

5. Info Retrieval from Repository Directly from DB Directly from DB –Using SQL queries –Not recommended Using web services interface Using web services interface –Java Axis, Perl, WSIF –Web service is flexible for distance connections

6. Other Methods Embedded Embedded –Include clients in your own Java applications –Store information collected to DB –Embed the repository Provide the best possible performance Provide the best possible performance Direct Direct –Collect information directly through TCP/IP –Recommended only for special cases

7. Thanks! Questions and comments? Questions and comments?