steveloughran commented on a change in pull request #1208: HADOOP-16423.
S3Guard fsck: Check metadata consistency between S3 and metadatastore (log)
URL: https://github.com/apache/hadoop/pull/1208#discussion_r321703265
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File path:
hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/s3guard/S3GuardTool.java
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@@ -1485,6 +1486,89 @@ private void vprintln(PrintStream out, String format,
Object...
}
}
+ /**
+ * Prune metadata that has not been modified recently.
+ */
+ static class Fsck extends S3GuardTool {
+ public static final String CHECK_FLAG = "check";
+
+ public static final String NAME = "fsck";
+ public static final String PURPOSE = "Compares S3 with MetadataStore, and "
+ + "returns a failure status if any rules or invariants are violated. "
+ + "Only works with DynamoDbMetadataStore.";
Review comment:
+ say "-check" in usage so its clear that you need the prefix
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