Creating and assigning storage grades

A storage grade identifies the type of storage used by a Storage Node to store object data, for example, flash or spinning disk. If you use more than one type of storage, you can optionally create a storage grade to identify each type. Creating storage grades makes it easier to select the Storage Node when configuring storage pools.

Before you begin

If storage grade is not a concern (for example, your StorageGRID Webscale system only uses spinning disks), skip this procedure and instead use the system-generated storage grade “All Disks” when configuring a storage pool.

About this task

When creating storage grades, do not create more storage grades than necessary. For example, do not create one storage grade for each Storage Node. Instead, assign each storage grade to two or more nodes. Storage grades assigned to only one node can cause ILM backlogs if that node becomes unavailable.

Note: You cannot configure storage grades for Archive Nodes.

Steps

  1. Select ILM > Storage Grades.
  2. Create a storage grade:
    1. For each storage grade you need to define, click Insert insert icon to add a row and enter a label for the storage grade.
      The Default storage grade cannot be modified. It is reserved for new LDR services added during a StorageGRID Webscale system expansion.

      Storage Grades page
    2. To edit an existing storage grade, click Edit edit icon and modify the label as required.
      Note: You cannot delete storage grades.
    3. Click Apply Changes.
      These storage grades are now available for assignment to LDR services.
  3. Assign a storage grade to an LDR service:
    1. For each Storage Node's LDR service, click Edit edit icon and select a storage grade from the list.

      Storage Grades page
      Attention: Assign a storage grade to a given Storage Node only once. A Storage Node recovered from failure maintains the previously assigned storage grade. Do not change this assignment once the ILM policy is activated. If the assignment is changed, data is stored based on the new storage grade.
    2. Click Apply Changes.