Describe about capacity design when adding storage nodes for HPEC 4D+2P.
The following is assumed:
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The valid physical capacity of each storage node to be added is the same as that of each existing storage node.
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The cluster does not have faulty storage nodes or faulty drives.
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The configuration, the capacity of each storage node, and the number of drives meet the system requirements.
For details about storage node requirements, see Storage node requirements in the VSP One SDS Block Setup and Configuration Guide for the model that you are using.
Under the assumptions, the increased logical capacity of the expansion storage
node is the same as the logical capacity of the storage node in the
pre-expansion configuration, so the total logical capacity can be calculated
using the following formula:
Total logical capacity after adding storage nodes = C × (N + A) / N
C: Total logical capacity before adding storage nodes
N: Number of storage nodes before adding storage nodes
A: Number of added storage nodes
(storage nodes can be added on a per-node basis)