This topic explains the cluster contraction procedure, which involves reducing a cluster's size by removing nodes sequentially, increasing the load on remaining nodes, and making decommissioned slots unavailable until re-enabled by operator input.
A cluster contraction is a cluster management operation that reduces a cluster’s size by removing one node at a time within legal boundaries, increases computational and memory load on the remaining nodes, and makes the decommissioned cluster slot unavailable until re-enabled by operator input.
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Reduces a cluster’s size by removing one node at a time within legal boundaries.
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Increases computational and memory load on the remaining nodes.
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Makes the decommissioned cluster slot unavailable until re-enabled by operator input.
Cluster contraction procedure
When contracting the cluster, always decommission the last APIC in the sequence first and proceed in reverse order. For example:
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Decommission APIC4 before APIC3.
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Decommission APIC3 before APIC2.