Rucio Development Meeting
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Europe/Zurich
Martin Barisits
(CERN)
Description
Zoom: https://cern.zoom.us/j/413496641
Meeting ID: 413 496 641
Find your local number: https://cern.zoom.us/u/aT2QQfXAo
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15:00
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15:10
News 10m
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15:10
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15:20
News from the experiments 10m
- ATLAS
- Issue with loadbalancer
- Possible to log rucio server being used in the backend to client
- Backend server part of header?
- Can be put into header by each server anyway, no matter if loadbalancer is used or not
- Thomas will have a look
- Potential issue with submitter?
- Some requests staying stuck in Q state and are not submitted to FTS
- Seen before also on CMS instance
- Needs further investigation
- Martin will look into it
- "Lost" files on e.g. read-only file systems can not be declared LOST in the current workflow
- Dimitrios will create issue
- Dumps: Possibility in replicas dump to flag a replica as being "the last"?
- Thomas currently in the process of re-writing dump scripts in Spark, can be added
- Issue with loadbalancer
- CMS
- Auth issue in JS
- Thomas is investigating, no news yet
- Auth issue in JS
- Belle II
- Monitoring
- New daemon or possible put into hermes?
- MultiVO
- Upgrade RAL rucio instance version
- DUNE/Ikarus/LSST/*
- Getting Rucio cluster to run
- ATLAS
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15:20
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15:30
Hot topics 10m
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15:30
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15:55
Developers roundtable 25m
- Burn chart and progress
- 1.23.0 LTS "The Incredible Donkey" priority followup
- In Progress
- Documentation overhaul [Martin, Dimitrios]
- Expand Kubernetes Usage [Thomas]
- Waiting for Ricardo for node investigation
- Reaper2 constantly increasing memory usage (until limit is hit) and restarts
- Confirmed by CMS too
- ~50 RSEs processed in reaper
- ATLAS made big jump to 300+ RSEs
- Being investigated
- Check memory usage
- ATLAS sees this on reaper1 now as well
- Related to gfal?
- Needs followup
- Confirmed by CMS too
- Debug features with attachable containers coming soon
- MultiZone cluster available now
- Increasing cluster size next week
- AAI/OIDC Testing and Improvements [Jaroslav]
- Test of propagation of account to transfertool
- New patch release to deploy the recent developments on WLCG DOMA cluster
- MultiVO Functionality #2635 [Eli]
- Bringing work up to date
- Meeting later on to specify next steps
- Discussion: Administration of different VOs
- Securing VOs, Accounts etc.
- List of code-parts which needs specific changes to enable Multi-VO
- Issue with migration script under py3.6 and oracle
- Unification of metadata interfaces #3096 [Aris]
- PR submitted, waiting for comments
- New Code management Model #3417 [Martin, Ben]
- Tested github actions to automate testing of cherry-picks against release branches
- Tests for PR would still run in travis, cherry-picks would be tested in github actions
- Might make sense to move everything to github actions
- Looked into different branching models
- Python 3 #3420 [Martin]
- rucio-clients setup.py fixed
- Starting to test py3 server again with travis
- To do
- Done
- In Progress
- Gitlab vs Github
- Worth to move (back) to GitLab
- At the moment no strong benefit, but might change in the future?
- Worth to move (back) to GitLab
- Auditor #3437 [Dimitrios]
- Comparison with old auditor
- Would be useful if CMS colleagues can test/compare the functionality as well
- Unit tests missing, but should come soon
- 2020-04-09
- Auditor #3437 [Dimitrios]
- Went through code
- Started to work on core function
- Test cases are missing
- Side-effects of only taking a dump with AVAILABLE replicas?
- Object stores
- Possible to get file lists from object stores (list buckets)
- Still two lists to compare
- Possible extra intelligence needed to handle corner cases
- Monitoring [Cedric, Thomas]
- For ATLAS monitoring aggregations are done in the monitoring infrastructure
- A light version of this would be useful for other communities too
- Tool/Daemon which does this aggregation
- Traces [Thomas]
- Trace infrastructure for CMS
- Actually not easy to do, since there is no documentation and schema
- Only Kronos daemon expects certain fields in the traces
- Setup (and enforce) a base schema on the server
- Decline and/or monitor the traces failing schema validation
- Kronos daemon has lots of ATLAS specifics
- Kronos2.0 makes experiment specific pluginable
- Auditor #3437 [Dimitrios]
- 2020-04-02
- Handling of lost files in archives in the necromancer [Cedric, Tomas]
- Tomas can look into it
- Will require additional queries to check for archives
- Auditor discussion [Dimitrios, Tomas]
- Input 2 files: DB Dump, Storage Dump
- Can Auditor not directly get DB information from Rucio (instead of relying on DB Dump)?
- Possible to do both ways?
- Difficult, since not all information is available in the db for past replica states
- Possible to do both ways?
- Auditor compares the 2 states (DB, Storage)
- Auditor might as well work on DB dump (without generated PFNs) and generate the PFNs during processing
- pre, common, post actions
- Directories for DB, Storage dump being filled (externally)
- Auditor runs and fetches data from the directories
- Auditor produces output
- Dimitrios will create a ticket to collect ideas/workflows and we move forward from there
- Collect usecases there, verify that it works (compared to old auditor)
- Handling of lost files in archives in the necromancer [Cedric, Tomas]
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15:55
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16:00
AOB 5m
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15:00
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15:10