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      Description

      Off the top of my head, I can think of:

      NN metrics:

      • A binary metric for active or standby
      • The size of the pending DN message queues
      • A timestamp for when the standby NN last read from shared edit log
      • The difference between highest generation stamp seen from the shared edit log and the highest generation stamp seen from any DN

      It would probably also be useful to have a DN metric which somehow describes which active/standby NNs its talking to, e.g. "times since last communicated with standby/active NNs."

      I'm sure there are others as well. Comments strongly encouraged.

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        1. HDFS-2510.HDFS-1623.patch
          7 kB
          Aaron T. Myers
        2. HDFS-2510-HDFS-1623.patch
          7 kB
          Aaron T. Myers

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            • Assignee:
              atm Aaron T. Myers
              Reporter:
              atm Aaron T. Myers
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