Hi everyone I have started a discussion about NameNode Fine-grained Locking to improve performance of write operations in NameNode.
I started this discussion again for serval main reasons: 1. We have implemented it and gained nearly 7x performance improvement in our prod environment 2. Many other companies made similar improvements based on their internal branch. 3. This topic has been discussed for a long time, but still without any results. I hope we can push this important improvement in the community so that all end-users can enjoy this significant improvement. I'd really appreciate you can join in and work with me to push this feature forward. Thanks very much. Ticket: HDFS-17366 <https://issues.apache.org/jira/browse/HDFS-17366> Design: NameNode Fine-grained locking based on directory tree <https://docs.google.com/document/d/1bVBQcI4jfzS0UrczB7UhsrQTXmrERGvBV-a9W3HCCjk/edit?usp=sharing>
