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Almudena Montiel GSI Darmstadt ALICE-LCG TF Meeting 28 jan 2010 1 What? AliEn Interface for Oracle RDBMS Why? To be able to run AliEn on Oracle To run the central services for CBM and Panda on a maintained, reliable, secure and fast central GSI service 2 Database.pm Uses DBI. Database independent interface for Perl 3 4 Data definition ◦ Data types: SERIAL, TEXT, BIGINT, DOUBLE, etc. only existing in MySQL. ◦ Reserved words: SIZE and TIMESTAMP are used as names for fields, but are reserved words for Oracle ◦ Autoincrement, only in MySQL. ◦ Implementation of user defined functions Data manipulation ◦ Be careful with the fields that changed their name for being reserved words. Utility ◦ Use “database” only MySQL Administration: ◦ SHOW TABLES, SHOW DATABASE only in MySQL 5 With DBI itself: ◦ For raw information about data types supported by the driver Perl::DBI::DatabaseHandle::type_info_all() ◦ To map data type codes to names Perl::DBI::DatabaseHandle::type_info() ◦ To show tables Perl::DBI::DataBaseMetaData::GetTables() … and more 6 The DRIVER used is indicated when creating an instance of Database The functionality is implemented by DBI Need to refactor the modules to make SQL portable 7 In the LDAP indicate, under Config ◦ For Oracle: catalogDriver=Oracle catalogueDatabase=no_host/Oracle/db-alice-test ◦ For MySQL catalogueDriver=mysql catalogueDatabase=“hostname”/mysql/db-alice-test Refactor the modules: ◦ ◦ ◦ ◦ ◦ Database/Catalogue/LFN.pm Database/Catalogue/GUID.pm Database/Catalogue/Shared.pm Database/Catalogue.pm Database.pm 8 Modified the test environment to run outside CERN Modifying the SQL code in the modules related to the FileCatalog 9 Modules affecting the FileCatalog (~1 week full time) ◦ LFN.pm, Shared.pm, GUID.pm, Catalogue.pm from the UI and Database packages ◦ CreateOrgDatabases.pl script Testing (~1 week full time) Make the SQL of the rest of the modules portable in order to be opened to future changes 10