IBM Power Ideas Portal


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Status Future consideration
Workspace AIX
Created by Guest
Created on Jun 14, 2023

RELATED IDEAS

Request for the additional parameter/function for detaching DDM from LVM Mirror

・Requested function: 
- I want to request a timeout parameter to enable users to adjust IO timeout to detach each hdisk from LVM Mirror configuration. 
- I want to request a function that enables a detachment of a DDM under LVM Mirror, in case its IO response slows down at extreme level comparing with another DDM under LVM mirror.

・Background: 
Currently, in LVM mirrors, IO failures are managed by default timeout values in device side and do not allow custom adjustment of IO for each hdisks in LVM function; it also takes too much time before it reaches the timeout value, especially for internal HDDs. Therefore, if a slowdown occurs in an unhealthy situation before an individual hdisk fails, the IO completion is dragged down by the slowdown. On the other hand, customers want to time out IO at an earlier timing when an individual hdisk slows down, consider the individual hdisk as fail, and disconnect it to eliminate the impact on IO speed.

Idea priority High

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