Tags:
view all tags
<!-- keep this as a security measure:<br /> * Set ALLOWTOPICCHANGE = Main.TWikiAdminGroup,Main.LCGAdminGroup,Main.EgiGroup<br /> * Set ALLOWTOPICRENAME = Main.TWikiAdminGroup,Main.LCGAdminGroup<br /> #uncomment this if you want the page only be viewable by the internal people<br /> #* Set ALLOWTOPICVIEW = Main.TWikiAdminGroup,Main.LCGAdminGroup,Main.ChippComputingBoardGroup<br />--> ---+ ATLAS resources federation * *Zoom link*: https://ethz.zoom.us/j/91556179990 <br />%TOC% Plan to federate two ATLAS sites into one. CSCS-LCG2 (dCache), UNIBE-LHEP (DPM) => CHIPP-CH (DPM) Note: the CSCS storage will physically remain at CSCS Step 1 storage: <ul type="square"> <li>Drain internally one dCache "storage unit" at CSCS, re-install it as a DPM "storage unit" and attach it to the Bern DPM head node</li> <li>Operate in this mode for a minimum of 6-8 weeks</li> <li>If no blocking issues are discovered: transition all storage pools from dCache to the DPM head node in Bern.</li> <li>Strategy to define, but can hope to drain and re-install as DPM (most of) them one by one internally if possible (to reduce load on DDM ops). This will shrink the size of the CSCS storage and increase that of the Bern storage.</li> <li>At some point during this procedure, move CSCS Panda queues to the Bern storage</li> <li>Make CSCS storage RO and finalise its draining and pool transition to the Bern storage</li> </ul> Step 2 create the new ATLAS site: <ul type="square"> <li>Transition the Bern DPM endpoints to the new site</li> </ul> Step 3 Panda queues <ul type="square"> <li>Move the Panda sites CSCS-LCG2 and UNIBE-LHEP (or create new ones) to the ATLAS site CHIPP-CH</li> </ul><blockquote> ---++ Technical meeting with the following goals: <ul> <ul> <li> ---+++++ Understand the Federation layout </li> * [[%ATTACHURL%/Swiss-ATLAS-Federation-layout.pdf][Swiss-ATLAS-Federation-layout.pdf]]<span style="background-color: transparent;">: Swiss ATLAS Federation layout</span> </ul></ul> <ul> <li> ---+++++ Understand CSCS storage layout for dCache and how to map it to DPM </li> <li> ---+++++ Understand the network layout between the two sites </li> * <a href="https://traffic.lan.switch.ch/vip/swiss-map/index.html" target="_blank">https://traffic.lan.switch.ch/vip/swiss-map/index.html<br /><br /></a> * Direct link with 100G capacity. Currently limited at 40G at the Bern border<br /><br /> * SE to SE path: <verbatim>[root@dpm ~]# traceroute se33.cscs.ch traceroute to se33.cscs.ch (148.187.19.183), 30 hops max, 60 byte packets 1 beethoven-67.unibe.ch (130.92.67.1) 0.342 ms 0.876 ms 0.276 ms 2 castorfw-inside.unibe.ch (130.92.0.36) 0.825 ms 0.815 ms 0.849 ms 3 castor-inside.unibe.ch (130.92.244.3) 1.008 ms 0.997 ms 1.366 ms 4 swiBE3-40GE-0-1-0-0-0.switch.ch (195.176.3.1) 1.317 ms 1.305 ms 1.254 ms 5 swiLG1-100GE-0-0-0-3.switch.ch (130.59.36.102) 4.201 ms 4.200 ms 4.157 ms 6 100G-C-IPv4.cscs.ch (148.187.0.10) 5.976 ms 3.717 ms 3.782 ms 7 se33.cscs.ch (148.187.19.183) 3.542 ms 3.509 ms 3.306 ms</verbatim> <p> </p> * SE to CE path (probably behind firewall):<br /> <verbatim>[root@dpm ~]# traceroute arc04.lcg.cscs.ch traceroute to arc04.lcg.cscs.ch (148.187.19.136), 30 hops max, 60 byte packets 1 beethoven-67.unibe.ch (130.92.67.1) 0.317 ms 0.310 ms 0.271 ms 2 castorfw-inside.unibe.ch (130.92.0.36) 0.830 ms 0.831 ms 0.930 ms 3 castor-inside.unibe.ch (130.92.244.3) 1.464 ms 1.551 ms 1.527 ms 4 swiBE3-40GE-0-1-0-0-0.switch.ch (195.176.3.1) 1.110 ms 1.547 ms 1.049 ms 5 swiLG1-100GE-0-0-0-3.switch.ch (130.59.36.102) 4.303 ms 4.297 ms 4.271 ms 6 * * *</verbatim> <p> </p> </ul> <ul> * <p>Work in progress: move Bern ARC CEs and SE nodes in DMZ </p> <li> ---+++++ Understand current network rates and data paths to/from dCache at CSCS </li> <li> ---+++++ Plan concretely the first step </li> <li> ---+++++ Lay a tentative plan out for the following step </li> <li> ---+++++ AOB </li> </ul></blockquote>
Attachments
Attachments
Topic attachments
I
Attachment
History
Action
Size
Date
Who
Comment
pdf
Swiss-ATLAS-Federation-layout.pdf
r1
manage
235.0 K
2020-07-20 - 08:08
GianfrancoSciacca
Swiss ATLAS Federation layout
Edit
|
Attach
|
Watch
|
P
rint version
|
H
istory
:
r8
|
r5
<
r4
<
r3
<
r2
|
B
acklinks
|
V
iew topic
|
Raw edit
|
More topic actions...
Topic revision: r3 - 2020-07-20
-
GianfrancoSciacca
LCGTier2
Log In
(Topic)
LCGTier2 Web
Create New Topic
Index
Search
Changes
Notifications
Statistics
Preferences
Users
Entry point / Contact
RoadMap
ATLAS Pages
CMS Pages
CMS User Howto
CHIPP CB
Outreach
Technical
Cluster details
Services
Hardware and OS
Tools & Tips
Monitoring
Logs
Maintenances
Meetings
Tests
Issues
Blog
Home
Site map
CmsTier3 web
LCGTier2 web
PhaseC web
Main web
Sandbox web
TWiki web
LCGTier2 Web
Users
Groups
Index
Search
Changes
Notifications
RSS Feed
Statistics
Preferences
P
View
Raw View
Print version
Find backlinks
History
More topic actions
Edit
Raw edit
Attach file or image
Edit topic preference settings
Set new parent
More topic actions
Warning: Can't find topic "".""
Account
Log In
Edit
Attach
Copyright © 2008-2024 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding TWiki?
Send feedback