[HDDS-759] Create config settings for SCM and OM DB directories

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.4.0
• Assignee: Arpit Agarwal
• Reporter: Arpit Agarwal
• Created: 30/Oct/18 00:21
• Updated: 31/Oct/18 21:18
• Resolved: 31/Oct/18 18:47

Description

Currently SCM, OM and DN all use ozone.metadata.dirs for storing metadata.

Looking more closely, it appears that SCM and OM have no option to choose separate locations. We should provide custom config settings. For most production clusters, admins will want to carefully choose where they place OM and SCM metadata, similar to how they choose locations for NN metadata.

To avoid disruption, we can have them fallback to ozone.metadata.dirs.