org.apache.hadoop.hbase.client.metrics.ScanMetrics Maven / Gradle / Ivy
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* to you under the Apache License, Version 2.0 (the
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*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
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*/
package org.apache.hadoop.hbase.client.metrics;
import java.util.concurrent.atomic.AtomicLong;
import org.apache.yetus.audience.InterfaceAudience;
/**
* Provides metrics related to scan operations (both server side and client side metrics).
*
* The data can be passed to mapreduce framework or other systems. We use atomic longs so that one
* thread can increment, while another atomically resets to zero after the values are reported to
* hadoop's counters.
*
* Some of these metrics are general for any client operation such as put However, there is no need
* for this. So they are defined under scan operation for now.
*/
@InterfaceAudience.Public
public class ScanMetrics extends ServerSideScanMetrics {
// AtomicLongs to hold the metrics values. These are all updated through ClientScanner and
// ScannerCallable. They are atomic longs so that atomic getAndSet can be used to reset the
// values after progress is passed to hadoop's counters.
public static final String RPC_CALLS_METRIC_NAME = "RPC_CALLS";
public static final String REMOTE_RPC_CALLS_METRIC_NAME = "REMOTE_RPC_CALLS";
public static final String MILLIS_BETWEEN_NEXTS_METRIC_NAME = "MILLIS_BETWEEN_NEXTS";
public static final String NOT_SERVING_REGION_EXCEPTION_METRIC_NAME =
"NOT_SERVING_REGION_EXCEPTION";
public static final String BYTES_IN_RESULTS_METRIC_NAME = "BYTES_IN_RESULTS";
public static final String BYTES_IN_REMOTE_RESULTS_METRIC_NAME = "BYTES_IN_REMOTE_RESULTS";
public static final String REGIONS_SCANNED_METRIC_NAME = "REGIONS_SCANNED";
public static final String RPC_RETRIES_METRIC_NAME = "RPC_RETRIES";
public static final String REMOTE_RPC_RETRIES_METRIC_NAME = "REMOTE_RPC_RETRIES";
/**
* number of RPC calls
*/
public final AtomicLong countOfRPCcalls = createCounter(RPC_CALLS_METRIC_NAME);
/**
* number of remote RPC calls
*/
public final AtomicLong countOfRemoteRPCcalls = createCounter(REMOTE_RPC_CALLS_METRIC_NAME);
/**
* sum of milliseconds between sequential next calls
*/
public final AtomicLong sumOfMillisSecBetweenNexts =
createCounter(MILLIS_BETWEEN_NEXTS_METRIC_NAME);
/**
* number of NotServingRegionException caught
*/
public final AtomicLong countOfNSRE = createCounter(NOT_SERVING_REGION_EXCEPTION_METRIC_NAME);
/**
* number of bytes in Result objects from region servers
*/
public final AtomicLong countOfBytesInResults = createCounter(BYTES_IN_RESULTS_METRIC_NAME);
/**
* number of bytes in Result objects from remote region servers
*/
public final AtomicLong countOfBytesInRemoteResults =
createCounter(BYTES_IN_REMOTE_RESULTS_METRIC_NAME);
/**
* number of regions
*/
public final AtomicLong countOfRegions = createCounter(REGIONS_SCANNED_METRIC_NAME);
/**
* number of RPC retries
*/
public final AtomicLong countOfRPCRetries = createCounter(RPC_RETRIES_METRIC_NAME);
/**
* number of remote RPC retries
*/
public final AtomicLong countOfRemoteRPCRetries = createCounter(REMOTE_RPC_RETRIES_METRIC_NAME);
/**
* constructor
*/
public ScanMetrics() {
}
}