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 !