DOMA / TPC Meeting

Wednesday 15 Aug 2018, 17:30 → 18:30 Europe/Zurich

HTTP update

Derek presented the status of http TPC testing which is progressing quite steadily.

There is no yet a full matrix of connectivity EOS was added this week while ECHO and STORM are still missing.

The storages that were already there and were yellow/red last week on the matrix have become green.

An extra DPM point (Glasgow) was added as well as EOS (CERN).

There is a list in the slides of known issues that are being followed up.

Integrating with rucio hasn't gone ahead yet, but Mario said they requested a new project on openstack for this at CERN so there should be progress in the next two weeks.

Andrea reported the FTS (GFAL?) patches made by Brian have been applied and can be tested.

There is a 10TB test which needs space at the participating sites. Paul will check if he can add 10TB for testing at DESY and Shawn offered AGLT2 as well. So this test should be covered.

Xrootd update

There is now an xrootd DTN container to possibly simplify the installation at sites that request it (BNL for example). DTN is a a front end service that does the TPC with external sites and then transfers to the local storage. It can work with any type of storage.

Wei said he would like to drop lcmaps authorization in favour of vomsxrd.

Paul asks how the authorization on the backend storage would be done. At the moment is done with host certificates but in the future it should be done with proxy delegation. there were some questions on how xrootd does proxy delegation, but we postponed the answer to when Andy will be present.

Alessandra commented that while the DTN is an important piece of deployment it will not be the way most sites will do TPC and we should push to have a testbed for a more direct aproach which differently from http is not there yet.

xrootd tpc is also a bit behind for development since only native xrootd with version >4.9 has it. Dcache has now implemented it but it is not yet tested. Sites have to install the new code. DPM depends on native xrootd.

But the first thing is to select participating sites and build a matrix like the http testing people are doing. So

DESY and AGLT2 are the sites volunteering to test xrootd development.

Glasgow can test also xrootd on DPM.  We will have to involve more sites for this.

 

 

 

 

17:30 → 17:50 HTTP Protocol Update

Speakers: Brian Paul Bockelman (University of Nebraska Lincoln (US)), Derek John Weitzel (University of Nebraska Lincoln (US))

HttpTpcUpdate-15-Aug.pdf

17:50 → 18:10 Xrootd Protocol Update

Speaker: Wei Yang (SLAC National Accelerator Laboratory (US))

18:10 → 18:20 Discussion