| /* |
| * 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.SerializationHeader; |
| import org.apache.cassandra.db.compaction.OperationType; |
| import org.apache.cassandra.db.lifecycle.LifecycleTransaction; |
| import org.apache.cassandra.db.rows.UnfilteredRowIterator; |
| import org.apache.cassandra.io.sstable.AbstractRowIndexEntry; |
| 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 MaxSSTableSizeWriter extends CompactionAwareWriter |
| { |
| private final long maxSSTableSize; |
| private final int level; |
| private final long estimatedSSTables; |
| private final Set<SSTableReader> allSSTables; |
| |
| public MaxSSTableSizeWriter(ColumnFamilyStore cfs, |
| Directories directories, |
| LifecycleTransaction txn, |
| Set<SSTableReader> nonExpiredSSTables, |
| long maxSSTableSize, |
| int level) |
| { |
| this(cfs, directories, txn, nonExpiredSSTables, maxSSTableSize, level, false); |
| } |
| |
| public MaxSSTableSizeWriter(ColumnFamilyStore cfs, |
| Directories directories, |
| LifecycleTransaction txn, |
| Set<SSTableReader> nonExpiredSSTables, |
| long maxSSTableSize, |
| int level, |
| boolean keepOriginals) |
| { |
| super(cfs, directories, txn, nonExpiredSSTables, keepOriginals); |
| this.allSSTables = txn.originals(); |
| this.level = level; |
| this.maxSSTableSize = maxSSTableSize; |
| |
| long totalSize = getTotalWriteSize(nonExpiredSSTables, estimatedTotalKeys, cfs, txn.opType()); |
| estimatedSSTables = Math.max(1, totalSize / maxSSTableSize); |
| } |
| |
| /** |
| * Gets the estimated total amount of data to write during compaction |
| */ |
| private static long getTotalWriteSize(Iterable<SSTableReader> nonExpiredSSTables, long estimatedTotalKeys, ColumnFamilyStore cfs, OperationType compactionType) |
| { |
| long estimatedKeysBeforeCompaction = 0; |
| for (SSTableReader sstable : nonExpiredSSTables) |
| estimatedKeysBeforeCompaction += sstable.estimatedKeys(); |
| estimatedKeysBeforeCompaction = Math.max(1, estimatedKeysBeforeCompaction); |
| double estimatedCompactionRatio = (double) estimatedTotalKeys / estimatedKeysBeforeCompaction; |
| |
| return Math.round(estimatedCompactionRatio * cfs.getExpectedCompactedFileSize(nonExpiredSSTables, compactionType)); |
| } |
| |
| protected boolean realAppend(UnfilteredRowIterator partition) |
| { |
| AbstractRowIndexEntry rie = sstableWriter.append(partition); |
| if (sstableWriter.currentWriter().getEstimatedOnDiskBytesWritten() > maxSSTableSize) |
| { |
| switchCompactionLocation(sstableDirectory); |
| } |
| return rie != null; |
| } |
| |
| @Override |
| public void switchCompactionLocation(Directories.DataDirectory location) |
| { |
| sstableDirectory = location; |
| |
| Descriptor descriptor = cfs.newSSTableDescriptor(getDirectories().getLocationForDisk(sstableDirectory)); |
| MetadataCollector collector = new MetadataCollector(allSSTables, cfs.metadata().comparator, level); |
| SerializationHeader header = SerializationHeader.make(cfs.metadata(), nonExpiredSSTables); |
| |
| @SuppressWarnings("resource") |
| SSTableWriter writer = newWriterBuilder(descriptor).setKeyCount(estimatedTotalKeys / estimatedSSTables) |
| .setMetadataCollector(collector) |
| .setSerializationHeader(header) |
| .build(txn, cfs); |
| sstableWriter.switchWriter(writer); |
| } |
| |
| @Override |
| protected long getExpectedWriteSize() |
| { |
| return Math.min(maxSSTableSize, super.getExpectedWriteSize()); |
| } |
| } |