| /* |
| * 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.cassandra.db.compaction.writers; |
| |
| import java.util.Set; |
| |
| import org.apache.cassandra.db.ColumnFamilyStore; |
| import org.apache.cassandra.db.Directories; |
| import org.apache.cassandra.db.RowIndexEntry; |
| import org.apache.cassandra.db.SerializationHeader; |
| import org.apache.cassandra.db.rows.UnfilteredRowIterator; |
| import org.apache.cassandra.db.compaction.LeveledManifest; |
| import org.apache.cassandra.db.lifecycle.LifecycleTransaction; |
| import org.apache.cassandra.io.sstable.Descriptor; |
| import org.apache.cassandra.io.sstable.format.SSTableReader; |
| import org.apache.cassandra.io.sstable.format.SSTableWriter; |
| import org.apache.cassandra.io.sstable.metadata.MetadataCollector; |
| |
| public class MajorLeveledCompactionWriter extends CompactionAwareWriter |
| { |
| private final long maxSSTableSize; |
| private int currentLevel = 1; |
| private long averageEstimatedKeysPerSSTable; |
| private long partitionsWritten = 0; |
| private long totalWrittenInLevel = 0; |
| private int sstablesWritten = 0; |
| private final long keysPerSSTable; |
| private Directories.DataDirectory sstableDirectory; |
| private final int levelFanoutSize; |
| |
| public MajorLeveledCompactionWriter(ColumnFamilyStore cfs, |
| Directories directories, |
| LifecycleTransaction txn, |
| Set<SSTableReader> nonExpiredSSTables, |
| long maxSSTableSize) |
| { |
| this(cfs, directories, txn, nonExpiredSSTables, maxSSTableSize, false); |
| } |
| |
| @Deprecated |
| public MajorLeveledCompactionWriter(ColumnFamilyStore cfs, |
| Directories directories, |
| LifecycleTransaction txn, |
| Set<SSTableReader> nonExpiredSSTables, |
| long maxSSTableSize, |
| boolean offline, |
| boolean keepOriginals) |
| { |
| this(cfs, directories, txn, nonExpiredSSTables, maxSSTableSize, keepOriginals); |
| } |
| |
| @SuppressWarnings("resource") |
| public MajorLeveledCompactionWriter(ColumnFamilyStore cfs, |
| Directories directories, |
| LifecycleTransaction txn, |
| Set<SSTableReader> nonExpiredSSTables, |
| long maxSSTableSize, |
| boolean keepOriginals) |
| { |
| super(cfs, directories, txn, nonExpiredSSTables, keepOriginals); |
| this.maxSSTableSize = maxSSTableSize; |
| this.levelFanoutSize = cfs.getLevelFanoutSize(); |
| long estimatedSSTables = Math.max(1, SSTableReader.getTotalBytes(nonExpiredSSTables) / maxSSTableSize); |
| keysPerSSTable = estimatedTotalKeys / estimatedSSTables; |
| } |
| |
| @Override |
| @SuppressWarnings("resource") |
| public boolean realAppend(UnfilteredRowIterator partition) |
| { |
| RowIndexEntry rie = sstableWriter.append(partition); |
| partitionsWritten++; |
| long totalWrittenInCurrentWriter = sstableWriter.currentWriter().getEstimatedOnDiskBytesWritten(); |
| if (totalWrittenInCurrentWriter > maxSSTableSize) |
| { |
| totalWrittenInLevel += totalWrittenInCurrentWriter; |
| if (totalWrittenInLevel > LeveledManifest.maxBytesForLevel(currentLevel, levelFanoutSize, maxSSTableSize)) |
| { |
| totalWrittenInLevel = 0; |
| currentLevel++; |
| } |
| switchCompactionLocation(sstableDirectory); |
| } |
| return rie != null; |
| |
| } |
| |
| @Override |
| public void switchCompactionLocation(Directories.DataDirectory location) |
| { |
| this.sstableDirectory = location; |
| averageEstimatedKeysPerSSTable = Math.round(((double) averageEstimatedKeysPerSSTable * sstablesWritten + partitionsWritten) / (sstablesWritten + 1)); |
| sstableWriter.switchWriter(SSTableWriter.create(Descriptor.fromFilename(cfs.getSSTablePath(getDirectories().getLocationForDisk(sstableDirectory))), |
| keysPerSSTable, |
| minRepairedAt, |
| cfs.metadata, |
| new MetadataCollector(txn.originals(), cfs.metadata.comparator, currentLevel), |
| SerializationHeader.make(cfs.metadata, txn.originals()), |
| cfs.indexManager.listIndexes(), |
| txn)); |
| partitionsWritten = 0; |
| sstablesWritten = 0; |
| |
| } |
| } |