org.apache.hudi.org.apache.hadoop.hbase.io.MetricsIOSource Maven / Gradle / Ivy
/**
* 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.hadoop.hbase.io;
import org.apache.hadoop.hbase.metrics.BaseSource;
import org.apache.yetus.audience.InterfaceAudience;
@InterfaceAudience.Private
public interface MetricsIOSource extends BaseSource {
/**
* The name of the metrics
*/
String METRICS_NAME = "IO";
/**
* The name of the metrics context that metrics will be under.
*/
String METRICS_CONTEXT = "regionserver";
/**
* Description
*/
String METRICS_DESCRIPTION = "Metrics about FileSystem IO";
/**
* The name of the metrics context that metrics will be under in jmx
*/
String METRICS_JMX_CONTEXT = "RegionServer,sub=" + METRICS_NAME;
String FS_READ_TIME_HISTO_KEY = "fsReadTime";
String FS_PREAD_TIME_HISTO_KEY = "fsPReadTime";
String FS_WRITE_HISTO_KEY = "fsWriteTime";
String CHECKSUM_FAILURES_KEY = "fsChecksumFailureCount";
String FS_READ_TIME_HISTO_DESC
= "Latency of HFile's sequential reads on this region server in milliseconds";
String FS_PREAD_TIME_HISTO_DESC
= "Latency of HFile's positional reads on this region server in milliseconds";
String FS_WRITE_TIME_HISTO_DESC
= "Latency of HFile's writes on this region server in milliseconds";
String CHECKSUM_FAILURES_DESC = "Number of checksum failures for the HBase HFile checksums at the"
+ " HBase level (separate from HDFS checksums)";
/**
* Update the fs sequential read time histogram
* @param t time it took, in milliseconds
*/
void updateFsReadTime(long t);
/**
* Update the fs positional read time histogram
* @param t time it took, in milliseconds
*/
void updateFsPReadTime(long t);
/**
* Update the fs write time histogram
* @param t time it took, in milliseconds
*/
void updateFsWriteTime(long t);
}