[HADOOP-6165] Add metadata to Serializations

• Type: New Feature
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Fix Version/s: 0.21.0
• Component/s: contrib/serialization
• Hadoop Flags: Reviewed
• Assignee: Thomas White
• Reporter: Thomas White
• Created: 22/Jul/09 11:23
• Updated: 18/Jul/14 23:44
• Resolved: 03/Sep/09 01:37

Description

The Serialization framework only allows a class to be passed as metadata. This assumes there is a one-to-one mapping between types and Serializations, which is overly restrictive. By permitting applications to pass arbitrary metadata to Serializations, they can get more control over which Serialization is used, and would also allow, for example, one to pass an Avro schema to an Avro Serialization.

Issue Links

• duplicates: HADOOP-4243 Serialization framework use SequenceFile/TFile/Other metadata to instantiate deserializer
• is related to: HADOOP-6698 Revert the io.serialization package to 0.20.2's api
• is related to: HADOOP-6120 Add support for Avro types in hadoop