dCache Developers' Workshop 2009

4 May 2009, 08:00 → 8 May 2009, 18:00 US/Central

Fermilab, Wilson Hall 3NW (mo, tu, fr), FCC2a (we, th)

Timur Perelmutov (FNAL)

A week long meeting dedicated to the joint design of the new features, planning and coordinating the work for the next 6 months of the dCache project.

Monday, 4 May

09:00 → 10:30 Gridka Operations

Discussion of Operational experiences and issues

10:30 → 12:00 Fermilab Operations

Discussion of Operational experiences and issues

US CMS T1 Issues US-CMS-T1-Issues.txt

US CMS T1 Issues Discussion US-CMS-T1-Issues-Discussion.txt

12:00 → 12:30 Lunch

12:30 → 14:30 Configuration, Packaging and Deployment design

Distribution vehicles for additional tools
Common Object Relation Mapping (ORM) library
Common log4j configuration
Optimize SRM packaging, deployment and upgrades
Modular domain definitions, cell mobility
Support for Multiple Gridftp/Kerberos doors on the same host by dcache script
Distributed Log file management, tools and procedures for distributed log analysis for problem detection and root cause analysis.

Minutes Configuration-Packaging-and-Deployment-Design-minutes_.txt

Minutes from Day 2 Day2-Configuration,_Packaging_and_Deployment_design.txt

14:30 → 15:30 Hands On 1: Log Fair

Collection and analysis of log files of several production systems. Scan for error and exception stack traces, identify bugs behind them.

15:30 → 17:00 Hands On 2: Break You dCache

Discuss dCache code structure.
Identify as many bugs as you can. Bugs have to be reproducable or identified in the code. Winner gets a price, a free dCache installation DVD + bragging rights.

Tuesday, 5 May

09:00 → 11:00 Project developement procedures and tools

Review of existing and alternative software development tools and procedures.
Communications and dispute resolutions.

Minutes Day2-development-procedures-and-tools.txt

10:00 → 11:00 Fermilab Operations, Day2, follow up to the day 1 discussion

Minutes US-CMS-T1-Issues-Discussion-Day2.txt

11:00 → 12:00 Release and Deployment

release schedules, deployment procedures, upgrade issues

Minutes Day2-Release-and-deployment-minutes.txt

12:00 → 12:30 Lunch

12:30 → 14:30 Chimera

Presentation of the Chimera features and status. Migration to Chimera, performance measurements, requirements. Chimera Deployment schedule.

14:30 → 15:00 ACLS

dCache NameSpace ACLs, ACLs for other objects in dCache

15:00 → 16:00 PnfsManager

PnfsManager performance improvements, support for dir listing
Horizontal scalability

16:00 → 17:00 Authorization and Identity Management

New features in gPlazma, authorization record
JAZ

Wednesday, 6 May

09:00 → 12:00 SRM Protocol Improvements

Review of the WLCG SRM Protocol improvement initiatives (SRM-BUSY, Async LS)
Transport Layer Security alternatives to GSI, delegation optimization, delegation in TLS
Client behavior optimization
Planning for upcoming Meeting on the future of the storage control protocols
Providing monitoring and usage info for CMS-T1 SRM at FNAL for DESY SRM meeting.

Minutes Day3-SRM.Prot.Improvements.txt

12:00 → 12:30 Lunch

12:30 → 14:30 Storage Resource Manager

Architecture Review
Ease and completeness of administrative functionality
Per user resource utilization limits (Pins, Space Reservations)

14:30 → 15:30 SRM Review Outcome

SRM Review Results. Review Recommendations implementation plan. Brainstorming of further improvements.

Minutes Day3-minutes.txt

15:30 → 17:00 Space Management support in dCache

Refactoring spaces, integration of all space/location management services

Minutes Day4-SRM-Space-Manager.txt

Thursday, 7 May

09:00 → 10:00 Door scalability and performance

Authorization caching
Distribution of the PoolManager pool selection functionality
NFS 4.1 Door

Minutes Day4-Door-Scalability-and-Performance.txt

Pnfs NFS Attribute caching discussion Day4-PnfsCacheing.discussion.txt

10:00 → 11:00 Re-balancing of File Distribution

Pool migration module, current functionality and future improvements and extensions
Other tools for rebalanced

Minutes Day4-Rebalansing-pools.txt

11:00 → 12:00 JMS support in Cells

Present support
Future functionality

12:00 → 12:30 Lunch

12:30 → 14:00 Dcache pool manager functionality

14:00 → 15:00 Information system interface

15:00 → 17:00 Cost functionality

Does it work for various loads and usage patters?
Improvement proposals

Friday, 8 May

09:00 → 10:30 Workshop Wrap up

Final Agreements ( or Agreeing to Disagree)

Minutes Day5-minutes.txt

10:30 → 12:00 Public Summary of the workshop