[
https://issues.apache.org/jira/browse/HDDS-12722?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Sumit Agrawal updated HDDS-12722:
---------------------------------
Description:
If duplicate replica are present for EC, currently it just have WARN log and
ignore further replica.
Where for Ratis, it is deleting duplicate replica based on BCSID.
For EC, there are below cases,
1. if replica is present with same replica index
* It is simple to delete duplicate replica index
2. if replica is present with different replica index
Solution needs to identify which one is last replica to be given preference.
*Container Id and state* during creation is kept in metadata path of datanode
(common place). It can keep additional information of replica index during:
* import of the EC container
* reconstruction of EC container on completion
This information can be used during startup to provide preference of EC replica
index.
For different index, it will be handled as part of
https://issues.apache.org/jira/browse/HDDS-13174
was:
If duplicate replica are present for EC, currently it just have WARN log and
ignore further replica.
Where for Ratis, it is deleting duplicate replica based on BCSID.
For EC, there are below cases,
1. if replica is present with same replica index
* It is simple to delete duplicate replica index
2. if replica is present with different replica index
Solution needs to identify which one is last replica to be given preference.
*Container Id and state* during creation is kept in metadata path of datanode
(common place). It can keep additional information of replica index during:
* import of the EC container
* reconstruction of EC container on completion
This information can be used during startup to provide preference of EC replica
index.
> EC duplicate replica handling in datanodes
> ------------------------------------------
>
> Key: HDDS-12722
> URL: https://issues.apache.org/jira/browse/HDDS-12722
> Project: Apache Ozone
> Issue Type: Sub-task
> Components: Ozone Datanode
> Reporter: Sumit Agrawal
> Priority: Major
>
> If duplicate replica are present for EC, currently it just have WARN log and
> ignore further replica.
> Where for Ratis, it is deleting duplicate replica based on BCSID.
>
> For EC, there are below cases,
> 1. if replica is present with same replica index
> * It is simple to delete duplicate replica index
> 2. if replica is present with different replica index
> Solution needs to identify which one is last replica to be given preference.
> *Container Id and state* during creation is kept in metadata path of datanode
> (common place). It can keep additional information of replica index during:
> * import of the EC container
> * reconstruction of EC container on completion
>
> This information can be used during startup to provide preference of EC
> replica index.
> For different index, it will be handled as part of
> https://issues.apache.org/jira/browse/HDDS-13174
>
>
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@ozone.apache.org
For additional commands, e-mail: issues-h...@ozone.apache.org
