Uploaded image for project: 'Hadoop Common'
  1. Hadoop Common
  2. HADOOP-15220 Über-jira: S3a phase V: Hadoop 3.2 features
  3. HADOOP-13853

S3ADataBlocks.DiskBlock to lazy create dest file for faster 0-byte puts

    XMLWordPrintableJSON

    Details

    • Type: Sub-task
    • Status: Resolved
    • Priority: Minor
    • Resolution: Won't Fix
    • Affects Version/s: 2.8.0
    • Fix Version/s: None
    • Component/s: fs/s3
    • Labels:
      None

      Description

      Looking at traces of work, there's invariably a PUT of a _SUCCESS at the end, which, with disk output, adds the overhead of creating, writing to and then reading a 0 byte file.

      With a lazy create, the creation could be postponed until the first write, with special handling in the startUpload() operation to return a null stream, rather than reopen the file. Saves on some disk IO: create, read, delete

        Attachments

          Issue Links

            Activity

              People

              • Assignee:
                Unassigned
                Reporter:
                stevel@apache.org Steve Loughran
              • Votes:
                0 Vote for this issue
                Watchers:
                2 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: