Owen Synge DCache 1.6.6-1 Slide 1

D-Cache Status Report

Owen Synge

Owen Synge DCache 1.6.6-1 Slide 2

Overview + Changes

• D-Cache– Has an SRM front end and a GsiFTP front end.– A single namespace distributed file system.– Deployed at multiple sites in GridPP– Based upon PNFS service

• NFS like server written in ANSI C– Many Java components providing functionality coupled to service in

async way.• PNFS manager, Location manager, Replica Management ..

• D-cache Updates– PNFS updates

• Supports New Postgres as storage backend• Supports space reservation (For SRM2)

– Improved configuration and packaging• Requiring new configuration management

– Billing Data Base– Cosmetic changes

Owen Synge DCache 1.6.6-1 Slide 3

Status of Testing

• RAL Teir 1 is upgrading to 1.6.6-1 to overcome performance issues with last release– Verified basic functionality an now preparing for

performance metrics.

• Upgrading process tested.• Verified functionality.

– Installation– DCAP– SRM copy– The user interfaces

Owen Synge DCache 1.6.6-1 Slide 4

YAIM Installation / Configuration Management

• YAIM entering testing phase for new release.– For installation not production upgrades– Complete rewrite of D-Cache module (configuration changes)

• Based upon work by – J Mencak, J Novak,L Poncent, O Keeble, L Field and M Aart– GridPP’s testing has been very useful

• Install differences insulated for Site Admins (Done)• New features under testing (Not finished)

– Three reinstall variables» Wipe PNFS Namespace» Drop Databases (Excluding PNFS Namespace)» Wipe D-Cache configuration files

– Separate configuration of admin, doors and pools• Planed (Not Started)

– Configuring Information system in YAIM– Creating PNFS databases per VO directory.

Owen Synge DCache 1.6.6-1 Slide 5

Quattor Installation / Configuration Management

• Quattor entering testing phase for new release.– New system for D-Cache 1.6.6-1 also version

specific.– Not yet committed to Quattor CVS– Written by Stijn De Weirdt based upon original

work by Andreas Nowack.– Based upon Postgres 8.1

• I have no Quattor experience so cant comment on solution further

Owen Synge DCache 1.6.6-1 Slide 6

Summary

• D-Cache 1.6.6-1 looks good– Too soon to say it is good, deployment systems

just coming on line (YAIM, Quattor)• Required for wide spread testing in next couple of weeks.

– Expect to upgrade all sites soonish!• For better auditing (See gregs talk?)• Not curtain when

– More testing/bug fix releases may effect schedules.• New bug fix release due in next couple of days

– Will be 1.6.6-2

• Production version 1.6.6 Upgrade talk by Greg follows !