PowerScale OneFS 9.2.1.0 CLI Administration Guide

PDF

Default file pool requested protection settings

Default protection settings include specifying the data storage target, snapshot storage target, requested protection, and SSD strategy for files that are filtered by the default file pool policy.


Settings (Web Admin)	Settings (CLI)	Description	Notes
Storage Target	--data-storage-target --data-ssd-strategy	Specifies the storage pool (node pool or tier) that you want to target with this file pool policy. CAUTION If existing file pool policies direct data to a specific storage pool, do not configure other file pool policies with anywhere for the Data storage target option. Because the specified storage pool is included when you use anywhere, target specific storage pools to avoid unintentional file storage locations. Select one of the following options to define your SSD strategy: Use SSDs for metadata read acceleration Default. Write both file data and metadata to HDDs and metadata to SSDs. Accelerates metadata reads only. Uses less SSD space than the Metadata read/write acceleration setting. Use SSDs for metadata read/write acceleration Write metadata to SSD pools. Uses significantly more SSD space than Metadata read acceleration, but accelerates metadata reads and writes. Use SSDs for data & metadata Use SSDs for both data and metadata. Regardless of whether global namespace acceleration is enabled, any SSD blocks reside on the storage target if there is room. Avoid SSDs Write all associated file data and metadata to HDDs only. CAUTION Use this to free SSD space only after consulting with PowerScale Technical Support; the setting can negatively affect performance.	NOTE If GNA is not enabled and the storage pool that you choose to target does not contain SSDs, you cannot define an SSD strategy. Use SSDs for metadata read acceleration writes both file data and metadata to HDD storage pools but adds an additional SSD mirror if possible to accelerate read performance. Uses HDDs to provide reliability and an extra metadata mirror to SSDs, if available, to improve read performance. Recommended for most uses. When you select Use SSDs for metadata read/write acceleration , the strategy uses SSDs, if available in the storage target, for performance and reliability. The extra mirror can be from a different storage pool using GNA enabled or from the same node pool. Neither the Use SSDs for data & metadata strategy nor the Use SSDs for data & metadata strategy result in the creation of additional mirrors beyond the normal requested protection. Both file data and metadata are stored on SSDs if available within the file pool policy. This option requires a significant amount of SSD storage.
Snapshot storage target	--snapshot-storage-target --snapshot-ssd-strategy	Specifies the storage pool that you want to target for snapshot storage with this file pool policy. The settings are the same as those for data storage target, but apply to snapshot data.	Notes for data storage target apply to snapshot storage target
Requested protection	--set-requested-protection	Default of storage pool. Assign the default requested protection of the storage pool to the filtered files. Specific level. Assign a specified requested protection to the filtered files.	To change the requested protection , select a new value from the list.