| /* |
| * 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. |
| */ |
| |
| /** This class will come with HBase 2.0 in package org.apache.hadoop.hbase.util **/ |
| package org.apache.kylin.storage.hbase.util; |
| |
| import java.io.IOException; |
| import java.util.*; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hbase.*; |
| import org.apache.hadoop.hbase.client.*; |
| import org.apache.hadoop.hbase.util.Bytes; |
| import org.apache.kylin.common.util.Pair; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| 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); |
| |
| private final Map<byte[], Pair<Integer, Integer>> countMap = new TreeMap<>(Bytes.BYTES_COMPARATOR); |
| |
| static final String ENABLE_REGIONSIZECALCULATOR = "hbase.regionsizecalculator.enable"; |
| |
| /** |
| * Computes size of each region for table and given column families. |
| * */ |
| public HBaseRegionSizeCalculator(String tableName, Connection hbaseConnection) throws IOException { |
| |
| Table table = null; |
| Admin admin = null; |
| try { |
| table = hbaseConnection.getTable(TableName.valueOf(tableName)); |
| admin = hbaseConnection.getAdmin(); |
| |
| if (!enabled(table.getConfiguration())) { |
| logger.info("Region size calculation disabled."); |
| return; |
| } |
| |
| logger.info("Calculating region sizes for table \"" + table.getName() + "\"."); |
| |
| // Get regions for table. |
| RegionLocator regionLocator = hbaseConnection.getRegionLocator(table.getName()); |
| List<HRegionLocation> regionLocationList = regionLocator.getAllRegionLocations(); |
| Set<byte[]> tableRegions = new TreeSet<byte[]>(Bytes.BYTES_COMPARATOR); |
| |
| for (HRegionLocation hRegionLocation : regionLocationList) { |
| tableRegions.add(hRegionLocation.getRegionInfo().getRegionName()); |
| } |
| |
| ClusterStatus clusterStatus = admin.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); |
| countMap.put(regionId, new Pair<>(regionLoad.getStores(), regionLoad.getStorefiles())); |
| |
| // logger.info("Region " + regionLoad.getNameAsString() |
| // + " has size " + regionSizeBytes); |
| } |
| } |
| } |
| } finally { |
| admin.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); |
| } |
| |
| public Map<byte[], Pair<Integer, Integer>> getRegionHFileCountMap() { |
| return Collections.unmodifiableMap(countMap); |
| } |
| } |