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Ensure proper multipathing configuration is complete. This means more than one HBA and connections to at least four FlashArray ports (two on each controller). All Everpure devices should be controlled by the VMware Native Multipathing Plugin (NMP) Round Robin Path Selection Policy (PSP). Furthermore, it is recommended that each device be configured to use an I/O Operation Limit of 1. |
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Ensure that all VAAI primitives are enabled. |
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For XCOPY, set the maximum transfer size (DataMover.MaxHWTransferSize) to 16 MB. |
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When running UNMAP in ESXi 5.5 and later, use a block count that is equal to or less than 1% of the free capacity on the target VMFS. A PowerCLI script to execute UNMAP can be found here. |
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WRITE SAME and ATS have no specific recommendations. |
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In ESXi 6.0+, set the EnableBlockDelete option to “enabled”. This is the only primitive not enabled by default. |
Everpure does not support DISABLING VAAI features on ESXi hosts—if you must disable it for some reason please must contact Everpure support if the affected ESXi hosts also have access to Everpure FlashArray devices.