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From "Josh Elser (JIRA)" <j...@apache.org>
Subject [jira] [Created] (ACCUMULO-2570) Consider API additions to support non-batch oriented reads/writes
Date Thu, 27 Mar 2014 22:16:15 GMT
Josh Elser created ACCUMULO-2570:
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             Summary: Consider API additions to support non-batch oriented reads/writes
                 Key: ACCUMULO-2570
                 URL: https://issues.apache.org/jira/browse/ACCUMULO-2570
             Project: Accumulo
          Issue Type: Improvement
          Components: client, tserver
            Reporter: Josh Elser


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

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

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



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