HP Cluster Test Software manual NFS performance tuning, Nfs

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9 NFS performance tuning

NOTE: This section applies only to the image version of Cluster Test.

Cluster Test Image allows some kernel parameter tuning that improves NFS performance and slow node booting when all the compute nodes are booted simultaneously. These parameters are optimal values derived after evaluation with supported HP hardware.

The RPCNFSDCOUNT value is increased to 128 from the default value of 8 in /etc/sysconfig/

nfs.

These are the TCP tuning parameters implemented in /etc/sysctl.conf file.

net.core.rmem_default 524288 net.core.rmem_max 524288 net.ipv4.tcp_rmem "8192 262144 524288" net.ipv4.tcp_wmem "8192 262144 524288"

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Contents HP Cluster Test Administration Guide January Contents Sample test output Useful files and directories Utility commandsDocumentation feedback Glossary Index Varieties of Cluster Test CT Image using a networkCT Image RPM Running cluster tests Cluster Test GUIStarting Cluster Test Files generated by Cluster TestCluster Test GUI Running cluster tests Configuration settings Running tests in a batch Using scripts to run tests Running cluster tests CrissCross Test descriptionsNodes monitoring window Monitoring tests and viewing resultsTest output window Monitoring tests and viewing results Performance analysis Test report Checking the InfiniBand fabric Cluster Test toolbar menus Cluster Test toolbar menusStarting accelerator tests Accelerator test GUIFiles generated by accelerator test GPU detection Running accelerator testsVerify Memory Test Sgemm Single Precision General Matrix Multiply TestDgemm Double Precision General Matrix Multiply Test BandWidth GPU Bandwidth TestNvidia Linpack Cuda Accelerated Linpack Benchmark Configuring Cluster Test when using RPM Cluster Test procedure as recommended by HPAdditional software Accelerator test procedure Cluster Test procedure as recommended by HP Cluster Test procedure # checkadm Cluster Test procedure Cluster Test procedure as recommended by HP Performance monitor utility Performance monitorPerformance Monitor toolbar menu Xperf utility Hardware Inventory Cluster Test toolsFirmware Summary Server health check Excluding the head node from tests Disk Scrubber Cluster Test tools Running tests in parallel An example per-node directory Creating and changing per node filesAn example cloned per-node directory Nfs NFS performance tuningDetecting new hardware TroubleshootingCluster Test Troubleshooting Guide Troubleshooting Cluster TestContacting HP Support and other resourcesScope of this document Intended audienceWebsites New and changed information in this editionRelated information DocumentationCustomer self repair Typographic conventionsCustomer self repair Cluster Test Useful Files and Directories Useful files and directoriesAnalyze Utility commandsConrep Files generated by ibfabriccheck Inspectibfabric.pl Inspectibfabric.pl Utility commands Ipmitool Pdsh CrissCross Sample test outputSample test output Test4 Pallas Mpibyte Sample test output Stream Node24 Triad 3078.7949 3355 3488 3536 CPU Disk TestUTK LinpackPassed Passed Passed Documentation feedback CMU GlossaryIndex MPI Accelerator

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