There have been several previous posts and blog articles detailing Node Compatibility in OneFS.
As part of this feature, OneFS 7.2 and beyond also contain an SSD compatibility option, which allows nodes with dissimilar capacity SSDs to be provisioned to a single node pool.
For example, say you have a cluster with two S200 node pools: The first pool comprises of three S200 nodes, each containing a 400GB SSD, and the second pool contains three S200 nodes, each with 800GB SSDs. If you then wish to consolidate these two S200 pools into one, you can create an SSD compatibility to achieve this.
SSD compatibilities can be created for the following node types: S200, S210, X200, X210, X400, X410, NL400, and NL410.
The procedure to create an SSD compatibility is as follows:
1. Select File System > Storage Pools > SmartPools > Compatibilities > Create an SSD Compatibility.
The “Create a Compatibility” dialog box displays a drop-down lists of available SSD compatibilities.
2. From the “Available SSD Compatibilities” list, select the appropriate node type.
For example, if you select “S200”, all S200 nodes, regardless of their SSD capacities, become compatible and can be provisioned to the same node pool.
3. Click “Create an SSD Compatibility”.
A “Confirm Changes to this Cluster” dialog box appears with one or more check boxes that you must select before proceeding.
4. Select all check boxes, then click “Confirm”.
The SSD compatibility is created and described in the Compatibilities list, and is also displayed in the Tiers & Node Pools list.
Note: When creating this SSD compatibility, OneFS automatically checks that the two pools to be merged have the same tier, requested protection, and L3 cache settings. If these settings differ, the OneFS WebUI will prompt for consolidation and alignment of these settings, as shown in the following screenshot.