[ACCUMULO-2570] Consider API additions to support non-batch oriented reads/writes

• Type: Sub-task
• Status: Resolved
• Priority: Trivial
• Resolution: Incomplete
• Component/s: client, tserver
• Assignee: Unassigned
• Reporter: Josh Elser
• Created: 27/Mar/14 22:14
• Updated: 03/Sep/21 22:15
• Resolved: 03/Sep/21 22:15

Description

Primary Read API : Scanner and BatchScanner
Primary Write API: BatchWriter

Both the Read calls are oriented to a scanning a collection of key-values (unless someone knows of the Range.exact method), and have internals that are focused on multiple, repeated fetching of batches.

For writes, Mutations are buffered internally and are focused around sending batches of updates.

While these classes do support pointed accesses (write a single Mutation, get the Value from a single Key), the API is not succinct and may incur unnecessary penalty due to the implementation also needing to support batch operations.

It would be nice to consider some new access patterns that are more focused around very pointed accesses that reduce the API complexity for simple cases. Extremely hypothetical example

  Value v = connector.get("tableName", new Key("row", "cf", "cq", "viz");
  connector.put("tableName", new Key("row", "cf", "cq", "viz"), new Value("value"));

The implementation could focus on specifically handling this pointed accesses in the most efficient way without worrying about also handling batch operations.