View source for Discussion of: RT data processing for ALICE HLT


* David:
** Parts of former (Run 1) compute infrastructure used for opportunistic GRID.
** RORC(ALICE) vs. FELIX(ATLAS, sPHENIX)
*** RORC: 12 optical links, 3 QSFPs  FELIX: 48 optical links, 2 MTPs
*** RORC: 79.2 Gbps (12x6.6Gpbs/channel) FELIX: up to 100Gbps
** Cluster management/OS: 
*** Booting, OS installation: Foreman + PXE-boot
*** OS: CERN CentOS 7
*** Package installation/configuration: Puppet
*** Node health and metrics: Zabbix 
*** "''...the complete cluster can be rebuilt, including the final configuration, in roughly three hours''"
** "''The old approach, using POSIX pipes, began to cause a significant CPU load through many system calls and was consequently replaced by a shared-memory based communication.''"