[GitHub] [accumulo-testing] tushardhadiwal commented on a change in pull request #118: Adding Accumulo Availability Monitor

[GitBox <gi...@apache.org>]

tushardhadiwal commented on a change in pull request #118: Adding Accumulo Availability Monitor
URL: https://github.com/apache/accumulo-testing/pull/118#discussion_r358546689
 
 

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 File path: src/main/java/org/apache/accumulo/testing/healthprobe/Monitor.java
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 @@ -0,0 +1,203 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.accumulo.testing.healthprobe;
+
+import static com.google.common.util.concurrent.Uninterruptibles.sleepUninterruptibly;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.Map.Entry;
+import java.util.Random;
+import java.util.concurrent.TimeUnit;
+
+import org.apache.accumulo.core.client.Accumulo;
+import org.apache.accumulo.core.client.AccumuloClient;
+import org.apache.accumulo.core.client.AccumuloException;
+import org.apache.accumulo.core.client.AccumuloSecurityException;
+import org.apache.accumulo.core.client.Scanner;
+import org.apache.accumulo.core.client.TableNotFoundException;
+import org.apache.accumulo.core.client.admin.TableOperations;
+import org.apache.accumulo.core.data.Key;
+import org.apache.accumulo.core.data.Range;
+import org.apache.accumulo.core.data.Value;
+import org.apache.accumulo.core.security.Authorizations;
+import org.apache.accumulo.core.util.FastFormat;
+import org.apache.hadoop.io.Text;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.slf4j.MDC;
+
+import com.google.common.collect.Lists;
+
+public class Monitor {
+
+  private static final Logger log = LoggerFactory.getLogger(Monitor.class);
+  private static final byte[] EMPTY_BYTES = new byte[0];
+  Random r = new Random();
+  static long distance = 100l;
+
+  public static void main(String[] args) throws Exception {
+    MonitorOpts opts = new MonitorOpts();
+    opts.parseArgs(Monitor.class.getName(), args);
+    distance = opts.distance;
+    Authorizations auth = new Authorizations(opts.auth);
+
+    try (AccumuloClient client = Accumulo.newClient().from(opts.getClientProps()).build();
+        Scanner scanner = client.createScanner(opts.tableName, auth )) {
+      if (opts.isolate) {
+        scanner.enableIsolation();
+      }
+      int scannerSleepMs = opts.sleep_ms;
+      LoopControl scanning_condition = opts.continuous ? new ContinuousLoopControl()
+          : new IterativeLoopControl(opts.scan_iterations);
+
+      while (scanning_condition.keepScanning()) {
+        Random tablet_index_generator = new Random();
+        Range range = pickRange(client.tableOperations(), opts.tableName, tablet_index_generator);
+        scanner.setRange(range);
+        if (opts.batch_size > 0) {
+          scanner.setBatchSize(opts.batch_size);
+        }
+        try {
+          long startTime = System.nanoTime();
+          int count = consume(scanner);
+          long stopTime = System.nanoTime();
+          MDC.put("StartTime", String.valueOf(startTime));
+          MDC.put("TabletIndex", String.valueOf(tablet_index_generator));
+          MDC.put("TableName", String.valueOf(opts.tableName));
+          MDC.put("TotalTime", String.valueOf((stopTime - startTime)));
+          MDC.put("StartRow", String.valueOf(range.getStartKey()));
+          MDC.put("EndRow", String.valueOf(range.getEndKey()));
+          MDC.put("TotalRecords", String.valueOf(count));
+
+          log.info("SCN starttime={} tabletindex={} tablename={} totaltime={} totalrecords={}", startTime,
+              tablet_index_generator, opts.tableName, (stopTime - startTime), count);
+          if (scannerSleepMs > 0) {
+            sleepUninterruptibly(scannerSleepMs, TimeUnit.MILLISECONDS);
+          }
+        } catch (Exception e) {
+          log.error(String.format(
+              "Exception while scanning range %s. Check the state of Accumulo for errors.", range), e);
+        }
+      }
+    }
+  }
+
+  public static int consume(Iterable<Entry<Key,Value>> iterable) {
+    Iterator<Entry<Key,Value>> itr = iterable.iterator();
+    int count = 0;
+    while (itr.hasNext()) {
+      Entry<Key,Value> e = itr.next();
+      Key key = e.getKey();
+      String readRow= key.getRow() + " " + key.getColumnFamily() + " " + key.getColumnQualifier() + " " + e.getValue();
+      count++;
+    }
+    return count;
+  }
+
+  public static long genLong(long min, long max, Random r) {
+    return ((r.nextLong() & 0x7fffffffffffffffL) % (max - min)) + min;
+  }
+
+  static byte[] genRow(long min, long max, Random r) {
+    return genRow(genLong(min, max, r));
+  }
+
+  public static byte[] genRow(long rowLong) {
+    return FastFormat.toZeroPaddedString(rowLong, 16, 16, EMPTY_BYTES);
+  }
+
+  public static Text genMaxRow(Text splitEnd) {
+    String padded = splitEnd.toString() + "0000000000000000".substring(splitEnd.toString().length());
+    Text maxRow = new Text(genRow( Long.parseLong(padded.trim(), 16) - 1l));
+    return maxRow;
+  }
+
+  public static Text genMinRow(Text splitStart) {
+    String padded = splitStart.toString()
+        + "0000000000000000".substring(splitStart.toString().length());
+    Text minRow = new Text(genRow(Long.parseLong(padded.trim(), 16)));
+    return minRow;
+  }
+
+  public static Range pickRange(TableOperations tops, String table, Random r)
+      throws TableNotFoundException, AccumuloSecurityException, AccumuloException {
+
+    ArrayList<Text> splits = Lists.newArrayList(tops.listSplits(table));
 
 Review comment:
   @phrocker Sure. I have pushed the commit to cache the splits.

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