FS System: How to Enable or Disable Automatic QoS (Quality of Service) Rebalancing (Doc ID 2045089.1)

Last updated on JULY 17, 2017

Applies to:

Oracle FS1-2 Flash Storage System - Version 6.1 and later
Information in this document applies to any platform.

Goal

The intent is to provide detailed instructions to enable or disable the Automatic QoS Rebalancing.

What is Automatic QoS Rebalancing?

When a LUN is created, the Oracle FS System might provision the volume across fewer drive groups than the optimal number that would satisfy the desired QoS settings for the volume. This situation can occur, for example, when an insufficient number of drive groups are available in the Storage Domain in which the volume is created. When the Automatic QoS Rebalancing feature is enabled for a Storage Domain, the Oracle FS System runs daily scans for any volumes that are sub-optimally provisioned across the Drive Groups. If sufficient space exists in the Storage Domain, the system begins migrating the data for those volumes to the available space. This situation can also occur when a Drive Enclosure is added to the Storage Domain.

Automatic QoS rebalancing occurs for auto-tiered LUNs and for single-tiered LUNs.

The scanning and the migration depend on the Storage Class of each volume in the Storage Domain. The migration occurs only when sufficient free space exists in the same Storage Class that is configured for the volume. 

Refer to <Document 2044829.1> FS System: Automatic QoS (Quality of Service) Rebalancing Recommended Setting for FS1-2 for important information.

 

Solution

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