| /* |
| * 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.io; |
| |
| import java.io.IOException; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import com.google.common.collect.ImmutableMap; |
| import com.google.common.collect.Lists; |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| import org.apache.cassandra.cql3.CQLTester; |
| import org.apache.cassandra.db.ColumnFamilyStore; |
| import org.apache.cassandra.db.compaction.CompactionInterruptedException; |
| import org.apache.cassandra.db.compaction.OperationType; |
| import org.apache.cassandra.db.lifecycle.LifecycleTransaction; |
| import org.apache.cassandra.db.lifecycle.SSTableSet; |
| import org.apache.cassandra.io.sstable.IndexSummaryManager; |
| import org.apache.cassandra.io.sstable.IndexSummaryRedistribution; |
| import org.apache.cassandra.io.sstable.format.SSTableReader; |
| import org.apache.cassandra.schema.TableId; |
| import org.apache.cassandra.utils.FBUtilities; |
| |
| public class DiskSpaceMetricsTest extends CQLTester |
| { |
| /** |
| * This test runs the system with normal operations and makes sure the disk metrics match reality |
| */ |
| @Test |
| public void baseline() throws Throwable |
| { |
| createTable("CREATE TABLE %s (pk bigint, PRIMARY KEY (pk)) WITH min_index_interval=1"); |
| ColumnFamilyStore cfs = getCurrentColumnFamilyStore(); |
| |
| // disable compaction so nothing changes between calculations |
| cfs.disableAutoCompaction(); |
| |
| // create 100 sstables |
| for (int i = 0; i < 100; i++) |
| insert(cfs, i); |
| assertDiskSpaceEqual(cfs); |
| } |
| |
| /** |
| * If index summary downsampling is interrupted in the middle, the metrics still reflect the real data |
| */ |
| @Test |
| public void summaryRedistribution() throws Throwable |
| { |
| createTable("CREATE TABLE %s (pk bigint, PRIMARY KEY (pk)) WITH min_index_interval=1"); |
| ColumnFamilyStore cfs = getCurrentColumnFamilyStore(); |
| |
| // disable compaction so nothing changes between calculations |
| cfs.disableAutoCompaction(); |
| |
| // create 100 sstables, make sure they have more than 1 value, else sampling can't happen |
| for (int i = 0; i < 100; i++) |
| insertN(cfs, 10, i); |
| assertDiskSpaceEqual(cfs); |
| |
| // summary downsample |
| for (int i = 0; i < 100; i++) |
| { |
| indexDownsampleCancelLastSSTable(cfs); |
| assertDiskSpaceEqual(cfs); |
| } |
| } |
| |
| private void insert(ColumnFamilyStore cfs, long value) throws Throwable |
| { |
| insertN(cfs, 1, value); |
| } |
| |
| private void insertN(ColumnFamilyStore cfs, int n, long base) throws Throwable |
| { |
| for (int i = 0; i < n; i++) |
| execute("INSERT INTO %s (pk) VALUES (?)", base + i); |
| |
| // flush to write the sstable |
| cfs.forceBlockingFlush(); |
| } |
| |
| private void assertDiskSpaceEqual(ColumnFamilyStore cfs) |
| { |
| long liveDiskSpaceUsed = cfs.metric.liveDiskSpaceUsed.getCount(); |
| long actual = 0; |
| for (SSTableReader sstable : cfs.getTracker().getView().liveSSTables()) |
| actual += sstable.bytesOnDisk(); |
| |
| Assert.assertEquals("bytes on disk does not match current metric liveDiskSpaceUsed", actual, liveDiskSpaceUsed); |
| |
| // totalDiskSpaceUsed is based off SStable delete, which is async: LogTransaction's tidy enqueues in ScheduledExecutors.nonPeriodicTasks |
| // wait for there to be no more pending sstable releases |
| LifecycleTransaction.waitForDeletions(); |
| long totalDiskSpaceUsed = cfs.metric.totalDiskSpaceUsed.getCount(); |
| Assert.assertEquals("bytes on disk does not match current metric totalDiskSpaceUsed", actual, totalDiskSpaceUsed); |
| } |
| |
| private static void indexDownsampleCancelLastSSTable(ColumnFamilyStore cfs) |
| { |
| List<SSTableReader> sstables = Lists.newArrayList(cfs.getSSTables(SSTableSet.CANONICAL)); |
| LifecycleTransaction txn = cfs.getTracker().tryModify(sstables, OperationType.UNKNOWN); |
| Map<TableId, LifecycleTransaction> txns = ImmutableMap.of(cfs.metadata.id, txn); |
| // fail on the last file (* 3 because we call isStopRequested 3 times for each sstable, and we should fail on the last) |
| AtomicInteger countdown = new AtomicInteger(3 * sstables.size() - 1); |
| IndexSummaryRedistribution redistribution = new IndexSummaryRedistribution(txns, 0, 0) { |
| public boolean isStopRequested() |
| { |
| return countdown.decrementAndGet() == 0; |
| } |
| }; |
| try |
| { |
| IndexSummaryManager.redistributeSummaries(redistribution); |
| Assert.fail("Should throw CompactionInterruptedException"); |
| } |
| catch (CompactionInterruptedException e) |
| { |
| // trying to get this to happen |
| } |
| catch (IOException e) |
| { |
| throw new RuntimeException(e); |
| } |
| finally |
| { |
| try |
| { |
| FBUtilities.closeAll(txns.values()); |
| } |
| catch (Exception e) |
| { |
| throw new RuntimeException(e); |
| } |
| } |
| } |
| } |