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PowerScale OneFS 9.6.x.x CLI Administration Guide

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Storage pool functions

When a cluster is installed, and whenever nodes are added to the cluster, OneFS automatically groups nodes into node pools. Autoprovisioning of nodes into node pools enables OneFS to optimize performance, reliability, and data protection on the cluster.

OneFS uses specific criteria to determine how, or whether, to group nodes into node pools. Nodes are compatible if there are no restrictions between them, or if existing restrictions can be overridden ("soft restrictions"). Nodes are equivalent if no restrictions exist between them. Nodes are automatically provisioned together only if they are equivalent. If nodes are compatible but not equivalent, you can manually move them into the same node pool.

OneFS provides the following functions:

Autoprovisioning of node pools
Automatically groups equivalent nodes into node pools for optimal storage efficiency and protection. At least three equivalent nodes are required for autoprovisioning to work.
Tiers
Groups node pools into logical tiers of storage.
Default file pool policy
Governs all file types and can store files anywhere on the cluster.
Requested protection
Specifies a requested protection setting for the default file pool, per node pool, or even on individual files. You can leave the default setting in place, or choose the suggested protection that is calculated by OneFS for optimal data protection.
Virtual hot spare
Reserves a portion of available storage space for data repair in the event of a disk failure.
SSD strategies
Defines the type of data that is stored on SSDs in the cluster. For example, storing metadata for read/write acceleration.
L3 cache
Specifies that SSDs in nodes are used to increase cache memory and speed up file system performance across larger working file sets.
Global namespace acceleration
Activates global namespace acceleration (GNA), which enables data that are stored on node pools without SSDs to access SSDs elsewhere in the cluster to store extra metadata mirrors. Extra metadata mirrors accelerate metadata read operations.

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