Uploaded image for project: 'Cassandra'
  1. Cassandra
  2. CASSANDRA-1125

Filter out ColumnFamily rows that aren't part of the query (using a KeyRange)

    XMLWordPrintableJSON

Details

    • New Feature
    • Status: Resolved
    • Low
    • Resolution: Fixed
    • 0.8.2
    • None
    • None

    Description

      Currently, when running a MapReduce job against data in a Cassandra data store, it reads through all the data for a particular ColumnFamily. This could be optimized to only read through those rows that have to do with the query.

      It's a small change but wanted to put it in Jira so that it didn't fall through the cracks.

      Attachments

        1. 1125-formatted.txt
          6 kB
          Jonathan Ellis
        2. 1125-v3.txt
          6 kB
          Jonathan Ellis
        3. CASSANDRA-1125.patch
          6 kB
          Michael Semb Wever
        4. CASSANDRA-1125.patch
          6 kB
          Michael Semb Wever

        Issue Links

          is depended upon by

          New Feature - A new feature of the product, which has yet to be developed. CASSANDRA-2878 Allow map/reduce to use server-side query filters

          • Urgent - This issue should block release until it is resolved, and trigger immediate release once resolved.
          • Resolved
          is duplicated by

          Improvement - An improvement or enhancement to an existing feature or task. CASSANDRA-2245 Enable map reduce to use indexes for ColumnFamilyInputFormat

          • Low -
          • Resolved

          Activity

            People

              mck Michael Semb Wever
              jeromatron Jeremy Hanna
              Michael Semb Wever
              Jonathan Ellis
              Votes:
              4 Vote for this issue
              Watchers:
              6 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved: