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OtterScale

Pool

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The Pool page allows you to manage Ceph storage pools, which are logical partitions for storing objects. Pools provide a layer of abstraction between clients and the underlying OSDs, allowing you to configure data durability, availability, and performance policies.

Statistics Overview

Section titled “Statistics Overview”

At the top of the page, you will find a dashboard summarizing the state of pool configuration within the cluster:

Pool

The total number of storage pools currently defined in the system.

Introduction

Section titled “Introduction”

The Pool page displays a list of all storage pools. The table includes the following information:

ColumnDescription
NameThe name of the pool. A spinner icon indicates if the pool is currently updating.
TypeThe type of the pool, either Replicated (copies data) or Erasure (uses erasure coding for efficiency). It also displays configuration details like replica count or erasure coding profile (k+m).
ApplicationsThe applications enabled for this pool (e.g., rbd, cephfs, rgw).
PG StateThe state of the Placement Groups (PGs) within the pool (e.g., active, clean, degraded).
UsageA progress bar indicating the amount of data stored in the pool relative to its total logical capacity.

Create Pool

Section titled “Create Pool”

You can create new storage pools to meet specific application requirements. The create dialog includes configuration fields for pool type, replica size or erasure coding settings, application assignment, and optional quotas.

  1. Click the Create button.
  2. Name: Enter a unique name for the pool.
  3. Type: Select the pool type:
    • Replicated: Stores multiple copies of data. Ideal for high performance and fast recovery.
      • Replicated Size: Specify the number of replicas (e.g., 3).
    • Erasure: Uses erasure coding to save space. Ideal for cold storage or large datasets.
      • EC Overwrite: Enable if you need to support overwrites (required for RBD/CephFS on EC pools).
  4. Quota: Optionally set limits on the pool’s usage:
    • Max Bytes: The maximum amount of data (in GB or TB) the pool can store.
  5. Advanced Settings (Optional):
    • Max Objects: The maximum number of objects the pool can store.
  6. Click Confirm to create the pool.

Manage Pools

Section titled “Manage Pools”

You can modify or delete existing pools using the Actions menu.

Edit Pool

Section titled “Edit Pool”

Allows you to modify the pool’s configuration, such as quotas.

  1. Select Edit from the actions menu (pencil icon).
  2. Update the Quota Size, or Quota Objects as needed.
  3. Click Confirm to save changes.

Delete Pool

Section titled “Delete Pool”

Permanently removes a storage pool and all its data.

  1. Select Delete from the actions menu (trash icon).
  2. Type the name of the pool to confirm deletion.
  3. Click Confirm to permanently delete the pool.