Hi Yan, 27.04.2011 08:14, Yan Gao wrote: [snip] >> Do priorities work for "utilization" strategy? > Yes, the improvement works for "utilization", "minimal" and "balanced" > strategy: > > - The nodes that are more healthy and have more capacities get consumed > first (globally preferred nodes).
Does this still valid for current tip? I tried to use utilization to place resources (virtual machines) to nodes based on four parameters, cpu usage, ram usage and storage I/O usage (for two storages). While I see almost perfect balancing on first two parameters, other two (storage I/O) are not considered at all for resource placement. Here are excerpts from ptest -LUs output: Original: v03-a capacity: vds-ok-pool-0-usage=99999999 vds-ok-pool-1-usage=99999999 cpu-decipct=11000 ram-hugepages-mb=44360 Original: v03-b capacity: vds-ok-pool-0-usage=99999999 vds-ok-pool-1-usage=99999999 cpu-decipct=11000 ram-hugepages-mb=44360 ... native_color: vptest1.vds-ok.com-vm allocation score on v03-a: 0 native_color: vptest1.vds-ok.com-vm allocation score on v03-b: 0 calculate_utilization: vptest1.vds-ok.com-vm utilization on v03-b: vds-ok-pool-1-usage=100 cpu-decipct=330 ram-hugepages-mb=1024 native_color: vptest2.vds-ok.com-vm allocation score on v03-a: 0 native_color: vptest2.vds-ok.com-vm allocation score on v03-b: 0 calculate_utilization: vptest2.vds-ok.com-vm utilization on v03-a: vds-ok-pool-0-usage=100 cpu-decipct=330 ram-hugepages-mb=1024 ... Remaining: v03-a capacity: vds-ok-pool-0-usage=99996799 vds-ok-pool-1-usage=99999999 cpu-decipct=110 ram-hugepages-mb=10568 Remaining: v03-b capacity: vds-ok-pool-0-usage=99999899 vds-ok-pool-1-usage=99996899 cpu-decipct=980 ram-hugepages-mb=10568 After that virtual machines placed such way so one node uses only first storage, other uses almost only second one. Am I missing something? Also could you please describe algorithm used for placement in little bit more details, so I would ask less stupid questions. Does it have something related to linear programming (f.e. http://en.wikipedia.org/wiki/Simplex_method)? Best, Vladislav _______________________________________________ Pacemaker mailing list: Pacemaker@oss.clusterlabs.org http://oss.clusterlabs.org/mailman/listinfo/pacemaker Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
