Package org.apache.hadoop.hdfs.metrics.LookasideMetrics

Examples of org.apache.hadoop.hdfs.metrics.LookasideMetrics.LocalMetrics

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    long maxSize = 5 * 1024;
    long evictPercent = 20;
    conf.setLong(LookasideCache.CACHESIZE, maxSize);
    conf.setLong(LookasideCache.CACHEEVICT_PERCENT,  evictPercent);
    LookasideCache cache = new LookasideCache(conf);
    LocalMetrics metrics = cache.getLocalMetrics();

    assertTrue(cache.getCacheMaxSize() == maxSize);
    assertTrue(cache.getCacheSize() == 0);
    assertTrue(cache.getCacheEvictPercent() == evictPercent);

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    long maxSize = 5 * 1024;
    long evictPercent = 20;
    conf.setLong(LookasideCache.CACHESIZE, maxSize);
    conf.setLong(LookasideCache.CACHEEVICT_PERCENT,  evictPercent);
    LookasideCache cache = new LookasideCache(conf);
    LocalMetrics metrics = LookasideCache.getLocalMetrics();
    metrics.reset();

    assertTrue(cache.getCacheMaxSize() == maxSize);
    assertTrue(cache.getCacheSize() == 0);
    assertTrue(cache.getCacheEvictPercent() == evictPercent);

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   * Metrics are locally gathers in the static structure called 'stats'.
   * These are returned here to the metrics module, and the local values
   * in 'stats' are zeroed out.
   */
  public static LocalMetrics copyZeroLocalMetrics() {
    return new LocalMetrics(localMetrics);
  }
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Related Classes of org.apache.hadoop.hdfs.metrics.LookasideMetrics.LocalMetrics

  • org.apache.hadoop.hdfs.LookasideCache
  • org.apache.hadoop.hdfs.TestLookasideCache
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