[
https://issues.apache.org/jira/browse/HDFS-11597?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16029221#comment-16029221
]
Tsz Wo Nicholas Sze commented on HDFS-11597:
--------------------------------------------
[~anu], you are right that RatisManagerImpl is to takes care of forming Ratis
clusters.
> Then this information is used to create a Ratis cluster dynamically, which is
> not part of this patch, ...
This patch indeed creates Ratis clusters via the createRatisCluster(..) method,
which further invokes the RaftClient.reinitialize(..). After HDFS-11865,
Datanode startup only initializes a Ratis RPC server but not forming any Ratis
cluster. RatisManagerImpl uses RaftClient.reinitialize(..) to reinitialize the
datanode Ratis server to form Ratis cluster.
For example, TestRatisManager starts 5 datanodes. It uses
createRatisCluster(..) to form three Ratis clusters
- ratis0: DN0, DN1, DN2
- ratis1: DN3
- ratis2: DN4
Then, it randomly closes two clusters by calling closeRatisCluster(..).
Finally, it uses updateDatanodes(..) to update the chosen cluster to include
the datanodes from the two closed clusters.
> Ozone: Add Ratis management API
> -------------------------------
>
> Key: HDFS-11597
> URL: https://issues.apache.org/jira/browse/HDFS-11597
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ozone
> Reporter: Tsz Wo Nicholas Sze
> Assignee: Tsz Wo Nicholas Sze
> Attachments: HDFS-11597-HDFS-7240.20170522.patch,
> HDFS-11597-HDFS-7240.20170523.patch, HDFS-11597-HDFS-7240.20170524.patch,
> HDFS-11597-HDFS-7240.20170528b.patch, HDFS-11597-HDFS-7240.20170528.patch,
> HDFS-11597-HDFS-7240.20170529.patch
>
>
> We need APIs to manage Ratis clusters for the following operations:
> - create cluster;
> - close cluster;
> - get members; and
> - update members.
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
