Dian Fu created HDFS-6467:
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Summary: Format mirror cluster with primary cluster's
NamespaceInfo in the runtime
Key: HDFS-6467
URL: https://issues.apache.org/jira/browse/HDFS-6467
Project: Hadoop HDFS
Issue Type: Sub-task
Affects Versions: 3.0.0
Reporter: Dian Fu
Fix For: 3.0.0
When a DFSClient write data to datanodes, it will specify a block pool id which
is used by datanodes to distinguish the federation this
data belongs to. We know that block pool id is generated by namenode when doing
format, so different namenodes will have different block
pool id.
In the sync mode of DR, a DFSClient in the primary cluster will write data to
Datanodes both in primary cluster and mirror cluster. So we
need guarantee that the block pool id of primary cluster and mirror cluster are
the same.
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