DaveTeng0 commented on code in PR #3754:
URL: https://github.com/apache/ozone/pull/3754#discussion_r975899571


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hadoop-ozone/tools/src/main/java/org/apache/hadoop/ozone/freon/RangeKeysGenerator.java:
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@@ -0,0 +1,144 @@
+package org.apache.hadoop.ozone.freon;
+
+import com.codahale.metrics.Timer;
+import org.apache.commons.lang3.RandomUtils;
+import org.apache.hadoop.hdds.cli.HddsVersionProvider;
+import org.apache.hadoop.hdds.conf.OzoneConfiguration;
+import org.apache.hadoop.ozone.client.OzoneBucket;
+import org.apache.hadoop.ozone.client.OzoneClient;
+import org.apache.hadoop.ozone.client.io.OzoneOutputStream;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import picocli.CommandLine;
+
+import java.util.concurrent.Callable;
+import java.util.function.Function;
+
+import static org.apache.hadoop.ozone.freon.KeyGeneratorUtil.PURE_INDEX;
+import static org.apache.hadoop.ozone.freon.KeyGeneratorUtil.MD5;
+import static 
org.apache.hadoop.ozone.freon.KeyGeneratorUtil.FILE_DIR_SEPARATOR;
+
+/**
+ * Ozone range keys generator for performance test.
+ */
[email protected](name = "ork",
+        description = "write range keys with the help of the ozone clients.",
+        versionProvider = HddsVersionProvider.class,
+        mixinStandardHelpOptions = true,
+        showDefaultValues = true)
+public class RangeKeysGenerator extends BaseFreonGenerator
+        implements Callable<Void> {
+
+  private static final Logger LOG =
+          LoggerFactory.getLogger(RangeKeysGenerator.class);
+
+  @CommandLine.Option(names = {"-v", "--volume"},
+          description = "Name of the volume which contains the test data. " +
+                  "Will be created if missing.",
+          defaultValue = "vol1")
+  private String volumeName;
+
+  @CommandLine.Option(names = {"-b", "--bucket"},
+          description = "Name of the bucket which contains the test data.",
+          defaultValue = "bucket1")
+  private String bucketName;
+
+  @CommandLine.Option(names = {"-r", "--range-each-client-write"},
+          description = "Write range for each client.",
+          defaultValue = "0")
+  private int range;
+
+  @CommandLine.Option(names = {"-k", "--key-encode"},
+          description = "The algorithm to generate key names. " +
+                  "Options are pureIndex, md5, simpleHash",
+          defaultValue = "simpleHash")
+  private String encodeFormat;

Review Comment:
   Sure!!



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