Jianfei Jiang created HDFS-13063:
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Summary: Fix the incorrect spelling in markdown file
HDFSHighAvailabilityWithQJM.md
Key: HDFS-13063
URL: https://issues.apache.org/jira/browse/HDFS-13063
Project: Hadoop HDFS
Issue Type: Improvement
Reporter: Jianfei Jiang
Assignee: Jianfei Jiang
The word JournalNode in this markdown file is incorrect spelled.
In order for the Standby node to keep its state synchronized with the Active
node, both nodes communicate with a group of separate daemons called
"JournalNodes" (JNs). When any namespace modification is performed by the
Active node, it durably logs a record of the modification to a majority of
these JNs. The Standby node is capable of reading the edits from the JNs, and
is constantly watching them for changes to the edit log. As the Standby Node
sees the edits, it applies them to its own namespace. In the event of a
failover, the Standby will ensure that it has read all of the edits from the
{color:#333333}*JounalNodes*{color} before promoting itself to the Active
state. This ensures that the namespace state is fully synchronized before a
failover occurs.
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