S Series Balancing service

The S Series Balancing service is a configurable service that balances object data across S Series Nodes in the same storage pool. The service ensures that the percent of space used across S Series Nodes in a pool remains roughly equivalent. The service is particularly useful when one or more S Series Nodes in the same storage pool is added to, removed from, or retired from an HCP system.

When the S Series Balancing service runs, it evaluates the storage level of each node in a pool. If the levels differ by a wide margin, the service moves objects around to bring the levels closer to a balanced state.

For the purpose of S Series balancing, HCP treats the following items as individual objects:

Parts of multipart objects

Parts of in-progress multipart uploads

Chunks for erasure-coded objects

Chunks for erasure-coded parts of multipart objects

The S Series Balancing service is included in the HCP Default Schedule. However, it remains idle until storage pools are configured to take advantage of the service.

To ensure optimal system performance in deployments with S Series storage pools that include multiple S Series Nodes, you need to add the service to your active service schedule.

New installations and upgrades will benefit from the S Series Balancing feature only when an S Series pool with multiple S Series Nodes is configured to use the service.

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