IBM Spectrum Scale Sharing Nothing Cluster performance tuning guide has been posted and please refer to link before you doing the below change.

A restart of IBM Spectrum Scale will be needed to bring into effect any configuration option changes that do not successfully complete with the ‘-i’ (immediate) option to mmchconfig (e.g. changing minMissedPingTimeout requires a restart).

The following configurations can be changed by using ‘mmchconfig’ as per the needs of the system workload:

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