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  1. Hadoop HDFS
  2. HDFS-12218

Rename split EC / replicated block metrics in BlockManager

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    • Target Version/s:
    • Hadoop Flags:
      Incompatible change
    • Release Note:
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      This renames ClientProtocol#getECBlockGroupsStats to ClientProtocol#getEcBlockGroupStats and ClientProtocol#getBlockStats to ClientProtocol#getReplicatedBlockStats. The return-type classes have also been similarly renamed. Their fields have also been renamed to drop the "stats" suffix.

      Additionally, ECBlockGroupStats#pendingDeletionBlockGroups has been renamed to ECBlockGroupStats#pendingDeletionBlocks, to clarify that this is the number of blocks, not block groups, pending deletion. The corresponding NameNode metric has also been renamed to PendingDeletionECBlocks.
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      This renames ClientProtocol#getECBlockGroupsStats to ClientProtocol#getEcBlockGroupStats and ClientProtocol#getBlockStats to ClientProtocol#getReplicatedBlockStats. The return-type classes have also been similarly renamed. Their fields have also been renamed to drop the "stats" suffix. Additionally, ECBlockGroupStats#pendingDeletionBlockGroups has been renamed to ECBlockGroupStats#pendingDeletionBlocks, to clarify that this is the number of blocks, not block groups, pending deletion. The corresponding NameNode metric has also been renamed to PendingDeletionECBlocks.

      Description

      Noted in HDFS-12206, we should propagate the naming changes made in HDFS-12206 for FSNamesystem into BlockManager and related classes. Also an opportunity to clarify usage of "ECBlocks" vs "ECBlockGroups" in some names.

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