Storage Data TEG facetoface Summary and Outlook Wahid

Storage / Data TEG face-to-face Summary and Outlook Wahid Bhimji

The diagram Layers; Data / Storage Split; Experiment/ Site responsibilities. • A sub-group to develop – strawman to come from Dirk • Develop draft for Feb 7 th GDB ? • In parallel continue expanding along the topic lines

Topical editors Data TEG • Data placement and Federation – Andrew Hanushevsky • WAN Protocols and FTS - Markus Schulz • Catalogues and Namespaces - Brian Bockelman Both (or shift ownership (tomorrow) to security TEG? ) Security and Access Control (DM 6/SM 6) : Maarten Litmaath Storage TEG • Separation of Disk and Tape: Andrew Lahiff • Storage Interfaces (SM 4): SRM and Clouds : Paul Millar • Management and operation of storage at sites: Andreases Heiss and Petzold • Storage I/O, LAN Protocols: Giacinto Donvito Add experiment co-editor to these

Process • Writing group volunteers now + send names to editors. • Everybody (in TEG) will see report • And everybody should feed into the process • Send and notes from here to editors; • “New” ideas should use the list(s) to allow further discussion. • Next week circulate 3 -4 slides as input to Feb 7 th GDB – helpful if editors can present this. . . • End Feb? Draft of report bringing in feedback from GDB and wider

Structure Capture outputs discussed here. Work towards a “strategy” (as per mandate) • Focus on requirements / principles – As expressed by experiments, recognizing concerns of sites, and developers inputs. • Match existing technologies to principles – Use solutions open to changing technology

We’ve been (near) here before… The Demonstrators • • • ATLAS Dynamic data ARC Caching Speeding up SRM MSG/catalogue synchronisation & MSG/ACL propagation CHIRP Xrootd: ATLAS/IT large-scale tests ; ATLAS CMS NFS 4. 1 as access protocol Coral. CDN Cassandra/Fuse as LFC/SRM alternative Proxy Caches

Thanks for the discussions!