[HDFS-10880] Federation Mount Table State Store internal API

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.9.0, 3.0.0
• Component/s: fs
• Hadoop Flags: Reviewed
• Assignee: Íñigo Goiri
• Reporter: Jason Kace
• Created: 20/Sep/16 23:19
• Updated: 13/Apr/18 15:38
• Resolved: 05/Aug/17 01:01

Description

The Federation Mount Table State encapsulates the mapping of file paths in the global namespace to a specific NN(nameservice) and local NN path. The mount table is shared by all router instances and represents a unified view of the global namespace. The state store API for the mount table allows the related records to be queried, updated and deleted.

Issue Links

• breaks: HDFS-13212 RBF: Fix router location cache issue
• breaks: HDFS-13233 RBF: MountTableResolver doesn't return the correct mount point of the given path
• depends upon: HDFS-10882 Federation State Store Interface API
• is depended upon by: HDFS-10646 Federation admin tool
• is related to: HADOOP-12077 Provide a multi-URI replication Inode for ViewFs
• relates to: HDFS-12772 RBF: Federation Router State State Store internal API
• relates to: HDFS-13224 RBF: Resolvers to support mount points across multiple subclusters
• relates to: HDFS-13443 RBF: Update mount table cache immediately after changing (add/update/remove) mount table entries.
• relates to: HDFS-12801 RBF: Set MountTableResolver as default file resolver