Storage and performance requirements

You must understand the storage and performance requirements for Storage Nodes hosted by virtual machines, so you can provide enough space to support the initial configuration and future storage expansion.

Performance requirements

The performance of the OS volume and of the first storage volume significantly impacts the overall performance of the system. Ensure that these provide adequate disk performance in terms of latency, input/output operations per second (IOPS), and throughput.

All StorageGRID Webscale nodes require that the OS drive and all storage volumes have write-back caching enabled. The cache must be on a protected or persistent media.

Storage requirements for Storage Nodes

A Storage Node can have 1 to 16 storage volumes; however, 3 or more storage volumes are recommended. Each storage volume should be 4 TB or larger.

Note that you must assign at least 3 TB to volume 0. This requirement is because StorageGRID Webscale reserves 3 TB of space on first storage volume (volume 0) of each Storage Node. The Metadata Reserved Space (CAWM) is required for object metadata and for essential database operations, such as compaction and repair.

If you assign additional space to volume 0, that space will be used for object storage. Assigning 4 TB or more to volume 0 is recommended.

Note: If you use only one storage volume for a Storage Node and you assign 3 TB or less to the volume, the Storage Node immediately enters the Storage Read-Only state on startup and stores object metadata only.
Note: If you assign less than 500 GB to volume 0 (non-production use only), 10% of the storage volume's capacity will be reserved for metadata.