Technical Coordination Weekly

Tuesday 7 Nov 2017, 14:00 → 15:30 Europe/Stockholm

Skype

Balazs Konya (Lunds universitet)

Technical coordination group members and invited persons

07 November 2017, 14:05 - 14:47

Present:David, Maiken, Balazs, Aleksandr, Anders, Oxana

== News

Ljubljana ARC Camp is now officially announced starting morning 28.11, and ending 01.12 noon. Please book your travel as soon as possible. 

Anders reports that they have set up gitlab for themselves, not related to Deic. 

Nightlies are building nicely, smoother than for a long time in fact. Event-driven branch still does not build on el6, and some older fedora platforms. He thinks he remembers that the fix was easy, but not sure. El6 is important to keep supporting. Failure in compilation found to be easy fix according to David. Fix will be tried tonight. 

Status of event-driven branch: memory leaks in globus. But other than that ok to use as basis for ARC 6. 

Status of globus: Should use globus 6 for gridftp. Will need gridftp for transfers for clients. 

Another Harvester meeting Wednesday 08.11. Something based on aCT is the way to go for non-US HPC sites. What to do to get aCT doing what Harvester does. Want to get rid of pilot factories, reason for developing Harvester. aCT can replace pilot factories. Harvester for US HPCs, aCT for rest of the world. Already talked to a lot of people, there is understanding that this is the way to go. 

Oxana summarised a long thread on the WLCG Information system evolution task force email list. After a successful implementation of JSON for SEs, some would like to do the same for CEs and get rid of BDII (the original premise of the TF). There's a belief that BDII is the reason for wrong/missing info, like e.g. jobs per VO, and that developers refuse to patch BDII. Turned out that the patches in question were that to ARC infoproviders, not BDII, and are HTCondor-specific and some - for Glue 1.3 which is not supported by anybody but is still used by some VOs (ALICE?). Sysadmins clearly don't want to patch infoproviders themselves, neither do they want to develop generic patches that would apply to any LRMS. Bottom line: there is not enough understanding among customers what is needed and what the information means. The information system is probably way too complicated if clever people can not understand how and why it works.

Horizon 2020 Work Programme for years 2018-2020 is published; in terms of e-infrastructures it focusses on European Open Science Cloud (EOSC) and HPC in the context of PRACE. 

== Release

Nothing to report. 

== Bugs

Nothing new. One bug was accepted. 

== A.O.B

Next release 6 meeting will happen next week.  Report on each area of responsibility is expected.

14:00 → 14:20 News

ARC-related news from various activities

14:20 → 14:30 Actions follow-up

Follow-up on actions defined at the previous meeting

14:30 → 14:50 Release status

Coming release status

14:50 → 15:20 Bugs

New bugs since previous meeting, as well as blockers and critical ones

15:20 → 15:30 A.O.B.