Vinayakumar B created HDFS-7454:
-----------------------------------
Summary: Implement Global ACL Set for memory optimization in
NameNode
Key: HDFS-7454
URL: https://issues.apache.org/jira/browse/HDFS-7454
Project: Hadoop HDFS
Issue Type: Bug
Components: namenode
Reporter: Vinayakumar B
Assignee: Vinayakumar B
HDFS-5620 indicated a GlobalAclSet containing unique {{AclFeature}} can be
de-duplicated to save the memory in NameNode. However it was not implemented at
that time.
This Jira re-proposes same implementation, along with de-duplication of unique
{{AclEntry}} across all ACLs.
One simple usecase is:
A mapreduce user's home directory with the set of default ACLs, under which lot
of other files/directories could be created when jobs is run. Here all the
default ACLs of parent directory will be duplicated till the explicit delete of
those ACLs. With de-duplication,only one object will be in memory for the same
Entry across all ACLs of all files/directories.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
