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https://issues.apache.org/jira/browse/HDDS-7327?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zita Dombi reassigned HDDS-7327:
--------------------------------
Assignee: Zita Dombi
> Recon to note down replica states
> ---------------------------------
>
> Key: HDDS-7327
> URL: https://issues.apache.org/jira/browse/HDDS-7327
> Project: Apache Ozone
> Issue Type: Task
> Components: Ozone Recon
> Reporter: Siyao Meng
> Assignee: Zita Dombi
> Priority: Major
>
> Related previous discussion: HDDS-7098
> Right now it seems that Recon only takes note of the overall container health
> state in the Recon SQL DB:
> {code:bash}
> ij version 10.14
> ij> connect 'jdbc:derby:ozone_recon_derby.db';
> ij> show tables;
> TABLE_SCHEM |TABLE_NAME |REMARKS
> ------------------------------------------------------------------------
> ...
> SYSIBM |SYSDUMMY1 |
> RECON |CLUSTER_GROWTH_DAILY |
> RECON |FILE_COUNT_BY_SIZE |
> RECON |GLOBAL_STATS |
> RECON |RECON_TASK_STATUS |
> RECON |UNHEALTHY_CONTAINERS |
> 28 rows selected
> ij> select * from RECON.UNHEALTHY_CONTAINERS;
> container_id |container_state |in_state_since
> |expected_r&|actual_rep&|replica_de&|reason
> -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
> 1 |UNDER_REPLICATED|1665692819704 |3 |2
> |1 |NULL
> {code}
> but Recon does not record the [health state of individual
> replicas|https://github.com/apache/ozone/blob/1e546103f0650dadc29cc5b6c931c0040e2d1d9c/hadoop-hdds/interface-server/src/main/proto/ScmServerDatanodeHeartbeatProtocol.proto#L209-L220]
> in the container. This will be useful for users to check replica states in
> Recon.
> We might want to persist the info to Recon SQL DB only when datanodes report
> that a replica is unhealthy. Do not persist healthy ones to avoid too many
> writes (can lead to performance issues)
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