[ https://issues.apache.org/jira/browse/HDFS-5933?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Chris Nauroth resolved HDFS-5933. --------------------------------- Resolution: Fixed Fix Version/s: HDFS ACLs (HDFS-4685) +1 for the v2 rebase patch. I committed it to the HDFS-4685 branch. Thanks again, Haohui. > Optimize the FSImage layout for ACLs > ------------------------------------ > > Key: HDFS-5933 > URL: https://issues.apache.org/jira/browse/HDFS-5933 > Project: Hadoop HDFS > Issue Type: Sub-task > Components: hdfs-client, namenode, security > Affects Versions: HDFS ACLs (HDFS-4685) > Reporter: Haohui Mai > Assignee: Haohui Mai > Fix For: HDFS ACLs (HDFS-4685) > > Attachments: HDFS-5933.000.patch, HDFS-5933.001.patch, > HDFS-5933.002.patch > > > The current serialization of the ACLs is suboptimal. ACL entries should be > serialized using the same scheme that the PB-based FSImage serializes > permissions. > > An ACL entry is represented by a 32-bit integer in Big Endian format. The > bits can be divided in four segments: > [0:2) || [2:26) || [26:27) || [27:29) || [29:32) > [0:2) -- reserved for futute uses. > [2:26) -- the name of the entry, which is an ID that points to a string in > the StringTableSection. > [26:27) -- the scope of the entry (AclEntryScopeProto) > [27:29) -- the type of the entry (AclEntryTypeProto) > [29:32) -- the permission of the entry (FsActionProto) -- This message was sent by Atlassian JIRA (v6.1.5#6160)