Uploaded image for project: 'Hadoop HDFS'
  1. Hadoop HDFS
  2. HDFS-3544

Ability to use SimpleRegeratingCode to fix missing blocks

          Details

          • Type: Improvement
          • Status: Resolved
          • Priority: Major
          • Resolution: Won't Fix
          • Affects Version/s: None
          • Fix Version/s: None
          • Component/s: contrib/raid
          • Labels:
            None

            Description

            ReedSolomon encoding (n, k) has n storage nodes and can tolerate n-k failures. Regenerating a block needs to access k blocks. This is a problem when n and k are large. Instead, we can use simple regenerating codes (n, k, f) that does first does ReedSolomon (n,k) and then does XOR with f stripe size. Then, a single disk failure needs to access only f nodes and f can be very small.

              Attachments

                Issue Links

                depends upon

                Improvement - An improvement or enhancement to an existing feature or task. HDFS-3543 Refactor Raid so it can work better with new erasure codes

                • Major - Major loss of function.
                • Resolved

                  Activity

                    People

                    • Assignee:
                      Unassigned
                      Reporter:
                      dhruba dhruba borthakur
                    • Votes:
                      0 Vote for this issue
                      Watchers:
                      20 Start watching this issue

                      Dates

                      • Created:
                        Updated:
                        Resolved: