die kooperation von forschungszentrum karlsruhe gmbh und universität karlsruhe (th) dcache t1...
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![Page 1: Die Kooperation von Forschungszentrum Karlsruhe GmbH und Universität Karlsruhe (TH) dCache T1 admins and experts Welcome to FZK](https://reader034.vdocuments.site/reader034/viewer/2022042814/55204d7f49795902118d126f/html5/thumbnails/1.jpg)
Die Kooperation von Forschungszentrum Karlsruhe GmbH
und Universität Karlsruhe (TH)
dCache T1 adminsand experts
Welcome to FZK
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Die Kooperation von Forschungszentrum Karlsruhe GmbH
und Universität Karlsruhe (TH)
Shouting at storage
http://www.youtube.com/watch?v=tDacjrSCeq4
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Die Kooperation von Forschungszentrum Karlsruhe GmbH
und Universität Karlsruhe (TH)
Moral
• You never now what next interferes with your storage: monkeys, alpha waves, users?
• Without passengers most trains even in Germany would run in time.
• Without users most middleware components even dCache would run perfect
• Without admins everything will be …
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Die Kooperation von Forschungszentrum Karlsruhe GmbH
und Universität Karlsruhe (TH)
From the secretariat• Coffee breaks• Lunch no later than 13:00• Closure 17:45 max (bus leaves 18:00)• WLAN access
– user:dCache pw:dCacheT1ws• Notes and scripts
– Christopher and Xavier– Please send them your slides and scribbles
• SCC machine room visit– bring ID
• Sponsors– SCC – DataDirectNetworks
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Die Kooperation von Forschungszentrum Karlsruhe GmbH
und Universität Karlsruhe (TH)
Goals (to stability)1) Improve cooperation between T1 dCache sites and communication
with experiments2) identify instabilities of the setup
- single points of failure- common hardware failures- timeouts, VO reporting, site monitoring- known (site specific) bottlenecks
3) Identify experiment problems with the storage / dCache- what does not work that should work because it is needed- what does not work but you just have to deal with it
4) Identify and locate instabilities of the storage MW components- bugs/problems with SRM, FTS, gridFTP and used clients
4) Identify components that work like a swiss clock- start from there
We should try to work these out with the assistance of the developers and the experiments which I see in a supporting role only.
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Die Kooperation von Forschungszentrum Karlsruhe GmbH
und Universität Karlsruhe (TH)
Agenda
• Morning– admins union– tech session part 1a: what we have
• Afternoon– techsession part 1b: big issues
• Morning– techsession part 2: our todo’s and must haves
• Afternoon• declaration of goals• visit GridKa
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Die Kooperation von Forschungszentrum Karlsruhe GmbH
und Universität Karlsruhe (TH)
Agenda
• topics missing?• schedule changes?
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Die Kooperation von Forschungszentrum Karlsruhe GmbH
und Universität Karlsruhe (TH)
Readiness
• Service challenges 2004 - 2007• CCRC08, CCRC09, CCRC09.5• Experts
– Storage task force• part 1 storage architectures costs• part 2 tape systems (was never executed)
– Storage classes working group• diverted into SRM adaption to classes• fireworks at Mumbai
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Die Kooperation von Forschungszentrum Karlsruhe GmbH
und Universität Karlsruhe (TH)
Goal 1dCache admins unite
• agenda changes/wishes/requests• what can we deliver till 1/8/9 (7 months)• how do we handle experiment requests• how do we handle feature requests• how can we improve mutual assistance• how can we share experiences• peering? • how do we secure dCache future• how complicated is dCache. Scale 1-10• how many experts do you need to run the site
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Die Kooperation von Forschungszentrum Karlsruhe GmbH
und Universität Karlsruhe (TH)
Peer review?
• How do the setups compare– pool sizes, # write pools vs. read pools, costs calc.– failover (of pools, servers, wan)– what happens when chaotic access (analysis)
• People involved– 1st line, 2nd line
• Can we re-use efforts– tools repository?– guest logins (e.g. to compare configs)
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Die Kooperation von Forschungszentrum Karlsruhe GmbH
und Universität Karlsruhe (TH)
Sekretariat
• Lunch break• People leaving before 18:00
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Die Kooperation von Forschungszentrum Karlsruhe GmbH
und Universität Karlsruhe (TH)
Focus during talks andquestions and answers
• What does not work or reduces stability• What components are involved that
reduce stability• How do you intent to fix this• What works exceptionally well