question What stores clusterID, namespaceID, and blockpoolID? in Archives of Support Questions (Read Only)

What stores clusterID, namespaceID, and blockpoolID?

toide — Tue, 18 Sep 2018 10:43:13 GMT

What stores clusterID, namespaceID, and blockpoolID?

As far as I know...

${dfs.namenode.name.dir}/current/VERSION stores clusterID, namespaceID, and blockpoolID.

${dfs.journalnode.edits.dir}/${nameservice}/current/VERSION stores clusterID and namespaceID.

${dfs.datanode.data.dir}/current/VERSION stores clusterID.

Directory name under ${dfs.datanode.data.dir}/current includes blockpoolID.

${dfs.datanode.data.dir}/current/${blockpoolID}/current/VERSION stores namespaceID and blockpoolID.

Is there any other file or file name/directory name storing those IDs?

sandyy006 — Wed, 19 Sep 2018 15:57:15 GMT

The file/directory you mentioned are correct, apart from that i don't think there is any other location/file which has this information. Ref: https://hortonworks.com/blog/hdfs-metadata-directories-explained/

toide — Wed, 19 Sep 2018 17:14:25 GMT

That reference link is also helpful!

Srm — Tue, 28 Apr 2020 07:25:15 GMT

Hi,

I have a question regarding Cluster version.

There are separate nodes for primary and secondary machines, so the cluster version will be same or unique in this scenario?