IBM Power Systems 775 Manual

Contents

272 IBM Power Systems 775 for AIX and Linux HPC Solution5.2 Power 775 xCAT startup and shutdown proceduresThis section describes the steps that are used to start up and shut down the Power 775cluster.5.2.1 Startup proceduresThis section describes the steps that are used to start xCAT 2.66 and the Power 775hardware and software. The verification steps that are used as the system is started also aredescribed.The commands that are shown in this section are for an AIX environment. All examplesassume that the administrator has root authority on the EMS. This section is intended only asa post-installation startup procedure. Initial installation and configuration are not addressed inthis publication.For more information about the Power 775 related software, see these websites: https://www.ibm.com/developerworks/wikis/display/hpccentral/IBM+HPC+Clustering+with+Power+775+Overview https://www.ibm.com/developerworks/wikis/display/hpccentral/IBM+HPC+Clustering+with+Power+775+-+Cluster+GuideTerminologyThe following terms are used in this document: xCAT Direct FSP ManagementDirect FSP Management (DFM) is the name that is used to describe the ability of the xCATsoftware to communicate directly to the service processor of the Power system without theneed for the HMC management. Frame nodeThis node features the hwtype set to frame, which represents a high-end Power systemserver 24-inch frame. CEC nodeThis node features the attribute hwtype set to cec, which represents a Power system CEC(for example, one physical server). BPA nodeThis node features a hwtype set to BPA and represents one port on one bpa (each BPAhas two ports). For the purposes of xCAT, the BPA is the service processor that controlsthe frame. The relationship between the frame node and the BPA node from the systemadministrator's perspective is that the administrator must always use the frame nodedefinition for the xCAT hardware control commands. xCAT figures out which BPA nodesand their respective IP addresses to use for hardware service processor connections. FSP nodeThis node features the hwtype set to FSP and represents one port on the FSP. In one CECwith redundant FSPs, there are two FSPs and each FSP has two ports. There are fourFSP nodes that are defined by xCAT per server with redundant FSPs. Similar to therelationship between Frame node and BPA node, system administrators always use theCEC node for the hardware control commands. xCAT automatically uses the four FSPnode definitions and their attributes for hardware connections.