Which policy determines the priority of reconstructing data after a failure?

Rebuild throttling is the specific policy that controls the I/O resources and priority assigned to the data reconstruction process (rebuild) following a component failure. Administrators can adjust this policy to either accelerate the rebuild process to restore full redundancy quickly, which may impact front-end application performance, or to slow it down, minimizing the impact on active workloads but extending the time the system is in a degraded state. This directly determines the priority of reconstructing data.

1. Dell PowerFlex: Introduction to PowerFlex (Version 4.5

April 2023)

Page 18

Section: Rebuilds and rebalances: "PowerFlex rebuilds and rebalances are background I/O activities that run in the storage pool. The system administrator can control the I/O priority of these background activities to favor either the background activity or the foreground application I/O." This directly links the control of I/O priority to the rebuild process.

2. Dell PowerFlex: Best Practices Guide (Version 4.5

April 2023)

Page 21

Section: Rebuild and rebalance performance: "The rebuild and rebalance processes are background activities that consume I/O resources. PowerFlex allows you to control the performance of these activities to balance between the time it takes to complete the activity and the impact on the application performance." This confirms that throttling policies are used to manage the priority and impact of rebuilds.