Node class compatibilities

To be autoprovisioned, a node must be of the same equivalence class as the other nodes in the node pool. If a new node is not of the same equivalence class, you can enable the node to be provisioned to an existing node pool often by defining a node class compatibility.

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Isilon Infinity models cannot be made class compatible with any other node type.

If you have existing S200, X200, X400, or NL400 node pools, and you add fewer than three Isilon S210, X210, X410, or NL410 nodes, you can create node class compatibilities to provision the new nodes and make them functional within the cluster. Only S210, X210, X410, and NL410 nodes are currently eligible for node class compatibility with older node generations.

To be provisioned, the new nodes should have the same drive configurations as their older-generation counterparts and must have compatible RAM amounts, as shown in the following table:

S200/S210 Compatibility
X200/X210 Compatibility
X400/X410 Compatibility
NL400/NL410 Compatibility
S200 RAM
S210 RAM
X200 RAM
X210 RAM
X400 RAM
X410 RAM
NL400 RAM
NL410 RAM
24 GB
32 GB
6 GB
Not available
24 GB
32 GB
12 GB
Not available
48 GB
64 GB
12 GB
48 GB
64 GB
24 GB
24 GB
96 GB
128 GB
24 GB
24 GB
96 GB
128 GB
48 GB
48 GB
256 GB
48 GB
48 GB
192 GB
256 GB

If the new nodes have different drive configurations by virtue of having SSDs of varying capacities or counts, you need to create SSD capacity or SSD count compatibilities, in addition to node class compatibilities.

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After you have added three or more newer-generation nodes of a particular equivalence class to your cluster, you might want to remove the node class compatibilities that you have created. This step enables OneFS to autoprovision new S210, X210, X410, or NL410 nodes to their own node pools and take advantage of the higher performance specifications of the new node types. However, because larger node pools store data more efficiently, removing compatibilities can also reduce the amount of available storage on your cluster. If you are unsure whether to remove compatibilities, we recommend that you first consult with Isilon Technical Support.