1 / 6

Atlas POOL Replacement

Atlas POOL Replacement. Developer workshop on I/O and persistence evolution LAL, Orsay, 20-22 Feb 2012 Marcin Nowak (PAS BNL). POOL Code Migration. POOL code was migrated into ATLAS offline codebase in Q3 2011 Location: SVN, AtlasCore, Database/APR New requirement files

lowell
Télécharger la présentation

Atlas POOL Replacement

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Atlas POOL Replacement Developer workshop on I/O and persistence evolution LAL, Orsay, 20-22 Feb 2012 Marcin Nowak (PAS BNL)

  2. POOL Code Migration • POOL code was migrated into ATLAS offline codebase in Q3 2011 • Location: SVN, AtlasCore, Database/APR • New requirement files • 75% of the migration effort spent • Take from POOL only what ATLAS is actually using • Package-level granularity – see next slide • Minimize changes to the files and code • .cpp extensions! • Easier to keep in synch with LCG POOL • Gradual progress instead of big bang approach • Safer and more practical • Migration of tests was tricky (CMT) • Half of the integration tests is gone (no more DataSvc) • All remaining are working and run nightly • but without full automatic results validation • OVAL -> ? Marcin Nowak BNL PAS Group

  3. POOL Packages • Migrated packages POOLCoreStorageSvcRootStorageSvc FileCatalog XMLCatalogPersistencySvcImplicitCollectionCollectionBase RootCollectionRelationalCollectionCollectionUtilitiesTests • Packages not migrated • ObjectRelationalAccessRelationalStorageServiceRulesFileCatalogRelationalFileCatalogLFCCatalogDataSvcCollection Marcin Nowak BNL PAS Group

  4. APR – Athena Integration • New package : Database/APR in AtlasCore • Included in 17.5.0 release and 17.6.0 nightlies • Builds are based on LCG62 releases without POOL • External/AtlasPOOL glue package redirects to APR • Simple and fully transparent for “all” client packages • 3 packages using DataSvc for “trivial” purposes had to be adapted to PersistencySvc • A package importing LCG POOL directly were causing build process to freeze • Python utility loading RootCollection library (dictionary) explicitly had to be modified • In summary: relatively smooth migration • Developing and fixing of APR components much easier and faster now • But lack of any usable Athena release makes this a bit pointless still Marcin Nowak BNL PAS Group

  5. The “old” POOL • “old” POOL code remains in the LCG CVS repository • Still part of LCG60 and LCG61 nightly builds and new releases • LCG61 is used in Athena 17.1.X releases • Repository remains open for as long as ATLAS continues to use LCG61 • POOL and APR code is still identical • We hope to get any necessary ROOT-related fixes to RootStorageSvc from Markus and propagate them to APR • has not happened so far • I am developing Collection packages in APR and porting changes back to POOL • happens frequently • There are no Atlas-specific features introduced to APR yet Marcin Nowak BNL PAS Group

  6. New Possibilities with APR • Things we can do now that APR is part of Athena: • Move/merge TrigCollQuery with CollectionUtilities • Better integration • Easier tag acceptance for releases • Integrate/expose file management (FileManager?) • Collections, THistSvc • Do something about File Catalog • Seems like we treat it more like a nuisance than a useful feature • Integrate/replace Token with Athena/Gaudi navigation • Introduce dataset notion to navigation • Try to remove unused POOL persistency features • Listing for completeness, but not recommending Marcin Nowak BNL PAS Group

More Related