Using the Linux cpuplugd Daemon to manage CPU and memory resources from z/VM Linux guests
The following paper is available at developerWorks www.ibm.com/developerworks/linux/linux390/perf/tuning_cpuhotplug.html#cpuplugd IBM Information Center http://publib.boulder.ibm.com/infocenter/lnxinfo/v3r0m0/index.jsp?topic=%2Fliaag%2Fl0cpup00_2012.htm Sizing Linux z/VM guests can be a challenging task. Oversized guests often cause additional management effort by the Hypervisor and undersized guests often have performance-related issues with workload peaks. A large amount of guests with large ratios of resource overcommitment (more virtual resources than are physically available) and changing workload characteristics over time makes a correct sizing even more challenging. There is an updated version of the cpuplugd daemon available starting with SUSE Linux Enterprise Server (SLES) SP2 or Red Hat Enterprise Linux (RHEL) 6.2, which greatly enhances the capability to define rules and the available performance parameters for the rule set. This tool now provides exactly what is required to enable the operating system of the guest to manage the resources within the range of the guest definition. This study analyzes various rules for the Linux cpuplugd daemon, which can be used to automatically adjust CPU and memory resources of a Linux z/VM guest. Dorothea Matthaeus Linux on System z Information Development IBM Deutschland Entwicklung GmbH Mit freundlichen Grüßen / Kind regards Dr. Dorothea Matthaeus Planning, Project Management, and Strategy for ID deliverables IBM Systems &Technology Group, Systems Software Development / SW Information Entwicklung & Service -------------------------------------------------------------------------- ----------------------------------------------------------------- IBM Deutschland Schoenaicher Str. 220 71032 Boeblingen Phone: +49-7031-16-2791 E-Mail: d...@de.ibm.com -------------------------------------------------------------------------- ----------------------------------------------------------------- IBM Deutschland Research & Development GmbH / Vorsitzende des Aufsichtsrats: Martina Koederitz Geschäftsführung: Dirk Wittkopp Sitz der Gesellschaft: Böblingen / Registergericht: Amtsgericht Stuttgart, HRB 243294 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
