GOC resilience John Gordon, STFC GridPP 22 microtalk.

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Presentation transcript:

GOC resilience John Gordon, STFC GridPP 22 microtalk

GOCDB Failover (1) Web portal –Master instance at RAL, UK –Replica instance at ITWM, Germany Database –Master instance at RAL, UK –Replica instance at CNAF, Italy Oracle Materialised Views –Local backup instance at RAL, UK Oracle 11g Oracle 10g Oracle Xpress

GOCDB Failover (2) Master DB Replica DB Backup DB Master web portal GOCDB-PI Replica web portal confGOCDB-PIconf DNS alias 3 rd party tools End users operator

APEL APEL is client software and a central respository that collects data from many sources, not just its own client. Because it only receives and sends information daily it doesnt really need many 9s –If a client fails to connect the same data is reposted next time it connects. –This is true for R-GMA and the Message Bus. –Even more true for the distributed architecture because there will be a hierarchy of repositories

Local APEL Resilience APEL servers will run on VMware ESX cluster Allows images to be dynamically migrated between nodes for load balancing and maintenance Automatic migration on failure of a physical node. Could add same features as GOCDB but felt to be less necessary Could duplicate flexible archiver to store into two independent databases. R-GMA SPOF in current production version –Latest version allows multiple registries. Similar with multiple message brokers.