QoS support for autorecovery

When QoS is configured, the autorecovery process runs in a QoS class.

To get QoS support for autorecovery, you must enable QoS and assign IOPS to the maintenance and other classes of the storage pools that you want autorecovery to restore. For more information, see Setting the Quality of Service for I/O operations.

In IBM Storage Scale 4.2.1.x and 4.2.2.x, the autorecovery process always runs in the QoS maintenance class. If you assign a smaller share of IOPS to the maintenance class, this setting ensures that autorecovery does not compete with normal processes for I/O operations.

In IBM Storage Scale 4.2.3 and later, the autorecovery process runs in the QoS maintenance class only if one replica is lost. If more than one replica is lost, the autorecovery process runs in the QoS other class so that it completes faster.