<!-- 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> <ul> <ul> <li> ---+++++ Understand the Federation layout </li> * [[%ATTACHURL%/Swiss-ATLAS-Federation-layout.pdf][Swiss-ATLAS-Federation-layout.pdf]] : Swiss ATLAS Federation layout </ul></ul></ul></ul> ---+++++ Understand CSCS storage layout for dCache and how to map it to DPM <ul> <li> ---+++++ Understand the network layout between the two sites </li> <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 /></a></li> <li><a href="https://traffic.lan.switch.ch/vip/international-map/" target="_blank">https://traffic.lan.switch.ch/vip/international-map/</a></li> <li>Direct link between Bern and Lugano with 100G capacity. Currently limited at 40G at the Bern border<br /><br /></li> <li>Bern SE to CSCS 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> </li> <li>Bern SE to CSCS 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> </li> <li>BERN SE to the outside, e.g. NDGF</li> <li> <verbatim>[root@dpm ~]# traceroute piggy.ndgf.org traceroute to piggy.ndgf.org (109.105.124.142), 30 hops max, 60 byte packets 1 beethoven-67.unibe.ch (130.92.67.1) 0.362 ms 0.314 ms 0.283 ms 2 castorfw-inside.unibe.ch (130.92.0.36) 0.234 ms 0.258 ms 0.189 ms 3 castor-inside.unibe.ch (130.92.244.3) 0.824 ms 0.810 ms 0.882 ms 4 swiBE3-40GE-0-1-0-0-0.switch.ch (195.176.3.1) 0.703 ms 1.678 ms 1.675 ms 5 swiCE4-100GE-0-0-0-2.switch.ch (130.59.37.146) 3.687 ms 3.363 ms 3.693 ms 6 swiCE1-B4.switch.ch (130.59.36.69) 3.650 ms 5.370 ms 5.344 ms 7 switch.mx1.gen.ch.geant.net (62.40.124.21) 3.108 ms 3.107 ms 3.103 ms 8 ae6.mx1.par.fr.geant.net (62.40.98.183) 12.194 ms 12.023 ms 11.990 ms 9 ae5.mx1.lon2.uk.geant.net (62.40.98.178) 16.713 ms 16.657 ms 16.860 ms 10 ae6.mx1.lon.uk.geant.net (62.40.98.36) 17.574 ms 17.694 ms 17.381 ms 11 nordunet-gw.mx1.lon.uk.geant.net (62.40.124.130) 17.545 ms 17.531 ms 17.517 ms 12 dk-uni.nordu.net (109.105.97.126) 37.190 ms 37.187 ms 36.999 ms 13 dk-ore.nordu.net (109.105.97.132) 37.446 ms 38.076 ms 37.996 ms 14 dk-ore2.nordu.net (109.105.102.119) 53.793 ms 49.192 ms 49.131 ms 15 piggy.ndgf.org (109.105.124.142) 37.613 ms 37.508 ms 37.412 ms</verbatim> </li> <li><span style="background-color: transparent;">Work in progress: move Bern ARC CEs and SE nodes in DMZ</span></li> <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>
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Swiss ATLAS Federation layout
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