| /* |
| * Copyright 2013-2014 eBay Software Foundation |
| * |
| * Licensed 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. |
| */ |
| /** This class will come with HBase 2.0 in package org.apache.hadoop.hbase.util **/ |
| package com.kylinolap.common.util; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hbase.*; |
| import org.apache.hadoop.hbase.client.HBaseAdmin; |
| import org.apache.hadoop.hbase.client.HTable; |
| import org.apache.hadoop.hbase.util.Bytes; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.IOException; |
| import java.util.*; |
| |
| public class HBaseRegionSizeCalculator { |
| |
| private static final Logger logger = LoggerFactory.getLogger(HBaseRegionSizeCalculator.class); |
| |
| /** |
| * Maps each region to its size in bytes. |
| */ |
| private final Map<byte[], Long> sizeMap = new TreeMap<byte[], Long>(Bytes.BYTES_COMPARATOR); |
| |
| static final String ENABLE_REGIONSIZECALCULATOR = "hbase.regionsizecalculator.enable"; |
| |
| /** |
| * Computes size of each region for table and given column families. |
| */ |
| public HBaseRegionSizeCalculator(HTable table) throws IOException { |
| this(table, new HBaseAdmin(table.getConfiguration())); |
| } |
| |
| /** |
| * Constructor for unit testing |
| */ |
| HBaseRegionSizeCalculator(HTable table, HBaseAdmin hBaseAdmin) throws IOException { |
| |
| try { |
| if (!enabled(table.getConfiguration())) { |
| logger.info("Region size calculation disabled."); |
| return; |
| } |
| |
| logger.info("Calculating region sizes for table \"" + new String(table.getTableName()) + "\"."); |
| |
| // Get regions for table. |
| Set<HRegionInfo> tableRegionInfos = table.getRegionLocations().keySet(); |
| Set<byte[]> tableRegions = new TreeSet<byte[]>(Bytes.BYTES_COMPARATOR); |
| |
| for (HRegionInfo regionInfo : tableRegionInfos) { |
| tableRegions.add(regionInfo.getRegionName()); |
| } |
| |
| ClusterStatus clusterStatus = hBaseAdmin.getClusterStatus(); |
| Collection<ServerName> servers = clusterStatus.getServers(); |
| final long megaByte = 1024L * 1024L; |
| |
| // Iterate all cluster regions, filter regions from our table and compute their size. |
| for (ServerName serverName : servers) { |
| ServerLoad serverLoad = clusterStatus.getLoad(serverName); |
| |
| for (RegionLoad regionLoad : serverLoad.getRegionsLoad().values()) { |
| byte[] regionId = regionLoad.getName(); |
| |
| if (tableRegions.contains(regionId)) { |
| |
| long regionSizeBytes = regionLoad.getStorefileSizeMB() * megaByte; |
| sizeMap.put(regionId, regionSizeBytes); |
| |
| //logger.info("Region " + regionLoad.getNameAsString() + " has size " + regionSizeBytes); |
| } |
| } |
| } |
| } finally { |
| hBaseAdmin.close(); |
| } |
| |
| } |
| |
| boolean enabled(Configuration configuration) { |
| return configuration.getBoolean(ENABLE_REGIONSIZECALCULATOR, true); |
| } |
| |
| /** |
| * Returns size of given region in bytes. Returns 0 if region was not found. |
| */ |
| public long getRegionSize(byte[] regionId) { |
| Long size = sizeMap.get(regionId); |
| if (size == null) { |
| logger.info("Unknown region:" + Arrays.toString(regionId)); |
| return 0; |
| } else { |
| return size; |
| } |
| } |
| |
| public Map<byte[], Long> getRegionSizeMap() { |
| return Collections.unmodifiableMap(sizeMap); |
| } |
| } |