swagle commented on a change in pull request #1146: HDDS-1366. Add ability in Recon to track the number of small files in an Ozone Cluster URL: https://github.com/apache/hadoop/pull/1146#discussion_r309347235
########## File path: hadoop-ozone/ozone-recon/src/main/java/org/apache/hadoop/ozone/recon/tasks/FileSizeCountTask.java ########## @@ -0,0 +1,231 @@ +/** + * 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 + * <p> + * http://www.apache.org/licenses/LICENSE-2.0 + * <p> + * 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.ozone.recon.tasks; + +import com.google.inject.Inject; +import org.apache.commons.lang3.tuple.ImmutablePair; +import org.apache.commons.lang3.tuple.Pair; +import org.apache.hadoop.ozone.om.OMMetadataManager; +import org.apache.hadoop.ozone.om.helpers.OmKeyInfo; +import org.apache.hadoop.utils.db.Table; +import org.apache.hadoop.utils.db.TableIterator; +import org.hadoop.ozone.recon.schema.tables.daos.FileCountBySizeDao; +import org.hadoop.ozone.recon.schema.tables.pojos.FileCountBySize; +import org.jooq.Configuration; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + + +import java.io.IOException; +import java.util.ArrayList; +import java.util.Collection; +import java.util.Iterator; +import java.util.List; + +/** + * Class to iterate over the OM DB and store the counts of existing/new + * files binned into ranges (1KB, 10Kb..,10MB,..1PB) to the Recon + * fileSize DB. + */ +public class FileSizeCountTask extends ReconDBUpdateTask { + private static final Logger LOG = + LoggerFactory.getLogger(FileSizeCountTask.class); + + private int maxBinSize = 41; + private long maxFileSizeUpperBound = 1125899906842624L; + private long SIZE_512_TB = 562949953421312L; + private long[] upperBoundCount = new long[maxBinSize]; + private long ONE_KB = 1024L; + private Collection<String> tables = new ArrayList<>(); + private FileCountBySizeDao fileCountBySizeDao; + + @Inject + public FileSizeCountTask(OMMetadataManager omMetadataManager, + Configuration sqlConfiguration) { + super("FileSizeCountTask"); + try { + tables.add(omMetadataManager.getKeyTable().getName()); + fileCountBySizeDao = new FileCountBySizeDao(sqlConfiguration); + } catch (Exception e) { + LOG.error("Unable to fetch Key Table updates ", e); + } + } + + /** + * Read the Keys from OM snapshot DB and calculate the upper bound of + * File Size it belongs to. + * + * @param omMetadataManager OM Metadata instance. + * @return Pair + */ + @Override + public Pair<String, Boolean> reprocess(OMMetadataManager omMetadataManager) { + LOG.info("Starting a 'reprocess' run of FileSizeCountTask."); + + fetchUpperBoundCount("reprocess"); + + Table<String, OmKeyInfo> omKeyInfoTable = omMetadataManager.getKeyTable(); + try (TableIterator<String, ? extends Table.KeyValue<String, OmKeyInfo>> + keyIter = omKeyInfoTable.iterator()) { + while(keyIter.hasNext()) { + Table.KeyValue<String, OmKeyInfo> kv = keyIter.next(); + countFileSize(kv.getValue()); + } + + } catch (IOException ioEx) { + LOG.error("Unable to populate File Size Count in Recon DB. ", ioEx); + return new ImmutablePair<>(getTaskName(), false); + } finally { + populateFileCountBySizeDB(); + } + + LOG.info("Completed a 'reprocess' run of FileSizeCountTask."); + return new ImmutablePair<>(getTaskName(), true); + } + + private void fetchUpperBoundCount(String type) { + if(type.equals("process")) { + List<FileCountBySize> resultSet = fileCountBySizeDao.findAll(); + int index = 0; + if(resultSet != null) { + for (FileCountBySize row : resultSet) { + upperBoundCount[index] = row.getCount(); + index++; + } + } + } else { + upperBoundCount = new long[maxBinSize]; + } + } + + @Override + protected Collection<String> getTaskTables() { + return tables; + } + + /** + * Read the Keys from update events and update the count of files + * pertaining to a certain upper bound. + * + * @param events Update events - PUT/DELETE. + * @return Pair + */ + @Override + Pair<String, Boolean> process(OMUpdateEventBatch events) { + LOG.info("Starting a 'process' run of FileSizeCountTask."); + Iterator<OMDBUpdateEvent> eventIterator = events.getIterator(); + + fetchUpperBoundCount("process"); + + while (eventIterator.hasNext()) { + OMDBUpdateEvent<String, OmKeyInfo> omdbUpdateEvent = eventIterator.next(); + String updatedKey = omdbUpdateEvent.getKey(); + OmKeyInfo updatedValue = omdbUpdateEvent.getValue(); + + try{ + switch (omdbUpdateEvent.getAction()) { + case PUT: + updateUpperBoundCount(updatedValue, "PUT"); + break; + + case DELETE: + updateUpperBoundCount(updatedValue, "DELETE"); + break; + + default: LOG.trace("Skipping DB update event : " + omdbUpdateEvent + .getAction()); + } + } catch (IOException e) { + LOG.error("Unexpected exception while updating key data : {} {}", + updatedKey, e.getMessage()); + return new ImmutablePair<>(getTaskName(), false); + } finally { + populateFileCountBySizeDB(); + } + } + LOG.info("Completed a 'process' run of FileSizeCountTask."); + return new ImmutablePair<>(getTaskName(), true); + } + + /** + * Calculate the bin index based on size of the Key. + * + * @param dataSize Size of the key. + * @return int bin index in upperBoundCount + */ + private int calcBinIndex(long dataSize) { + if(dataSize >= maxFileSizeUpperBound) { + return Integer.MIN_VALUE; + } else if (dataSize > SIZE_512_TB) { + //given the small difference in 512TB and 512TB + 1B, index for both would + //return same, to differentiate specific condition added. + return maxBinSize - 1; + } + int logValue = (int) Math.ceil(Math.log(dataSize)/Math.log(2)); + if(logValue < 10){ Review comment: formatting, space between if and ( In many places. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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