| /* |
| * 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; |
| |
| import java.util.Set; |
| import java.util.stream.Collectors; |
| |
| import org.apache.cassandra.db.ColumnFamilyStore; |
| import org.apache.cassandra.db.Directories; |
| import org.apache.cassandra.db.compaction.writers.CompactionAwareWriter; |
| import org.apache.cassandra.db.compaction.writers.MajorLeveledCompactionWriter; |
| import org.apache.cassandra.db.compaction.writers.MaxSSTableSizeWriter; |
| import org.apache.cassandra.io.sstable.format.SSTableReader; |
| import org.apache.cassandra.db.lifecycle.LifecycleTransaction; |
| |
| public class LeveledCompactionTask extends CompactionTask |
| { |
| private final int level; |
| private final long maxSSTableBytes; |
| private final boolean majorCompaction; |
| |
| public LeveledCompactionTask(ColumnFamilyStore cfs, LifecycleTransaction txn, int level, int gcBefore, long maxSSTableBytes, boolean majorCompaction) |
| { |
| super(cfs, txn, gcBefore); |
| this.level = level; |
| this.maxSSTableBytes = maxSSTableBytes; |
| this.majorCompaction = majorCompaction; |
| } |
| |
| @Override |
| public CompactionAwareWriter getCompactionAwareWriter(ColumnFamilyStore cfs, |
| Directories directories, |
| LifecycleTransaction txn, |
| Set<SSTableReader> nonExpiredSSTables) |
| { |
| if (majorCompaction) |
| return new MajorLeveledCompactionWriter(cfs, directories, txn, nonExpiredSSTables, maxSSTableBytes, false); |
| return new MaxSSTableSizeWriter(cfs, directories, txn, nonExpiredSSTables, maxSSTableBytes, getLevel(), false); |
| } |
| |
| @Override |
| protected boolean partialCompactionsAcceptable() |
| { |
| throw new UnsupportedOperationException("This is now handled in reduceScopeForLimitedSpace"); |
| } |
| |
| protected int getLevel() |
| { |
| return level; |
| } |
| |
| @Override |
| public boolean reduceScopeForLimitedSpace(long expectedSize) |
| { |
| if (transaction.originals().size() > 1 && level <= 1) |
| { |
| // Try again w/o the largest one. |
| logger.warn("insufficient space to do L0 -> L{} compaction. {}MiB required, {} for compaction {}", |
| level, |
| (float) expectedSize / 1024 / 1024, |
| transaction.originals() |
| .stream() |
| .map(sstable -> String.format("%s (level=%s, size=%s)", sstable, sstable.getSSTableLevel(), sstable.onDiskLength())) |
| .collect(Collectors.joining(",")), |
| transaction.opId()); |
| // Note that we have removed files that are still marked as compacting. |
| // This suboptimal but ok since the caller will unmark all the sstables at the end. |
| int l0SSTableCount = 0; |
| SSTableReader largestL0SSTable = null; |
| for (SSTableReader sstable : transaction.originals()) |
| { |
| if (sstable.getSSTableLevel() == 0) |
| { |
| l0SSTableCount++; |
| if (largestL0SSTable == null || sstable.onDiskLength() > largestL0SSTable.onDiskLength()) |
| largestL0SSTable = sstable; |
| } |
| } |
| // no point doing a L0 -> L{0,1} compaction if we have cancelled all L0 sstables |
| if (largestL0SSTable != null && l0SSTableCount > 1) |
| { |
| logger.info("Removing {} (level={}, size={}) from compaction {}", |
| largestL0SSTable, |
| largestL0SSTable.getSSTableLevel(), |
| largestL0SSTable.onDiskLength(), |
| transaction.opId()); |
| transaction.cancel(largestL0SSTable); |
| return true; |
| } |
| } |
| return false; |
| } |
| } |