DPM Collaboration Board

Wednesday 14 Mar 2018, 14:00 → 16:00 Europe/Zurich

600/R-002 (CERN)

DPM Collaboration Board and Dev Meeting

• News from CERN

  • DPM Project Status

  • Effort projections

• DPM project strategy 2018

  • DPM 1.10 release

    • Testbeds

  • End of support for legacy components and Dome transition planning

  • Caching

• DPM Workshop 2018

• Collaboration

  • agreement

  • membership and tasks

• AOB

https://svnweb.cern.ch/trac/lcgdm/wiki/DPMCollaborationAgreement

# DPM Collaboration and Extended Dev Meeting
# Minutes

https://indico.cern.ch/event/713749/
Wed 14th March 2018

Present

Jiri Chudoba
Alessandra Doria
Fabrizio Furano
Oliver Keeble
Andrea Manzi
Andrea Sartirana
Sam Skipsey

# News from CERN

## DPM Project Status

The project is in a consolidation phase with no major developments planned. The priority is the infrastructure transition to Dome.

Andrea Manzi has taken over leadership of the FTS project and will have less time to dedicate to DPM support. He will continue to handle puppet.

##  DPM project strategy 2018

Oriented around DPM 1.10 release and transition to Dome.

# DPM 1.10 release

DPM 1.10 addresses all known issues. It is currently in EPEL-test where it will remain until the forthcoming xrootd release, at which point it will be rebuilt and pushed to stable. The current EPEL-test release is fully testable.

## Testbeds

We should use "WLCG middleware readiness" where possible to get experiment workflows onto Dome testbeds. DPM team wants to work with one or (preferably) two sites for each of Atlas and CMS in this way to ensure optimal pre-prod style test coverage.

Andrea S is ready to upgrade and trigger middleware readiness (CMS site).
Andrea will also ask LAPP (Atlas site).

Sam to get in touch with Edinburgh who are talking to Atlas about SE testing
 
Alessandra D. OK for upgrade after Easter (Atlas site).

## End of support for legacy components and Dome transition planning

The release of 1.10 to EPEL-stable will trigger the announcement of a 12-month support timetable for the "legacy components" (ie SRM, dpm, dpns, rfio). Support will end 12 months from that announcement.

## Caching
 
Fabrizio reiterated the presence of "volatile pools" in the latest DPM releases and their relevance to evolving Data Management scenarios in WLCG.

Alessandra has a fellow working on DPM caching.
  working on Atlas  
  ...may also try CMS

## Multi-site DPM

France and Italy indicated interest in this scenario. The Italian scenario is a multi-site cache.

Sam - UK decided that there wasn't much saving on a multi-site DPM - the cost of administering lower level storage remains

# DPM Workshop 2018

Alessandra: no big wish for "site reports" like before
  stick to highlights
  maybe more on caches
  space reservation details in Dome

Andrea S. agreed
  wld like feedback on particular experience (e.g. caches)
  also experiments if possible
  wld like hands-on session
  will collect main topics
  "Dome upgrade for CMS sites, Atlas sites etc"

Agreement that orienting sessions and advice by experiment would be beneficial.

Sam - agree on highlights only
  UK is a bit slow with puppet

Jiri - show some best practises
  e.g. we don't check logs until something breaks
  how can we compare protocol usage?
  is our SRM usage only tests? How do we know for sure we can turn it off?
  round table suggestions
    what are your best practise tips
    how do you analyse log files
    ...

Fabrizio - interested in have a more round-table, interactive style of meeting this time around.
  will shortly send out an announcement inviting registration for workshop
  will put an expiration date on registration to help planning

Times
  Decided 10am thu - 4pm fri
  We can put the core in Thu afternoon and Fri morning.

Still not sure about vid link - probably broadcast only.
  confirmation end of March.
  fee of 20-30 EUR
  dinner not included in fee.

# Collaboration

## agreement

No comments on agreement.

##  membership and tasks

### Italy
  as before
  + multi-site deployment
    e.g. multi-site cache, where cache is headless.

### France
  remove gridftp redir testing
  add multi-site DPM

### UK
  admin tools
  dome deployment
  Argus
  ansible
   will publish recipes
    
 
### Czech Rep.
  DPM workshop
  Dome upgrade, depending on availability

# AOB