[GitHub] [ozone] guihecheng commented on pull request #2290: HDDS-5268. Ensure disk checker also scans the ratis log disks periodically

[GitBox <gi...@apache.org>]

guihecheng commented on pull request #2290:
URL: https://github.com/apache/ozone/pull/2290#issuecomment-852690836


   > Thanks @guihecheng for working on this. Two general comments,
   > 
   > 1. The config "hdds.datanode.failed.volumes.tolerated" takes failed metadata volumes into consideration.  I would suggest use seperate properties to control the metadata volumes and data volumes.
   
   I'm fine with this separation, for example we could have 'hdds.datanode.failed.data.volumes.tolerated' and 'hdds.datanode.failed.meta.volumes.tolerated' and check them each.
   
   > 2. Would it be more clear that using different MutableVolumeSet to hold the data volume set and meta volume set?
   
   Yes, I think they could be in separate VolumeSets, then I think we could extract the periodic disk checker into HddsVolumeChecker and let these 2 VolumeSets register there volumes for check, then we retain a single checker for different kinds of volumes. Then it should be easy to add the potential rocksdb volumes mentioned below, in the future.
   
   > Please also do consider if the current abstration is enough if rocksdbs are combined into one instance and saved on a different disk than current data disk in future.
   
   


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