> But I don't understand, how was all the available space taken away. Take a look on disk at /var/lib/cassandra/data/<your_keyspace> and /var/lib/cassandra/commitlog to see what is taking up a lot of space.
Cassandra stores the column names as well as the values, so that can take up some space. > it says that while compaction a CorruptedBlockException has occured. Are you able to reproduce this error ? Thanks ----------------- Aaron Morton Freelance Developer @aaronmorton http://www.thelastpickle.com On 6/07/2012, at 12:04 AM, Nury Redjepow wrote: > Hello to all, > > I have cassandra instance I'm trying to use to store millions of file with > size ~ 3MB. Data structure is simple, 1 row for 1 file, with row key being > the id of file. > I'm loaded 1GB of data, and total available space is 10GB. And after a few > hour, all the available space was taken. In log, it says that while > compaction a CorruptedBlockException has occured. But I don't understand, how > was all the available space taken away. > > Data structure > CREATE KEYSPACE largeobjectsWITH placement_strategy = 'SimpleStrategy' > AND strategy_options={replication_factor:1}; > > create column family content > with column_type = 'Standard' > and comparator = 'UTF8Type' > and default_validation_class = 'BytesType' > and key_validation_class = 'TimeUUIDType' > and read_repair_chance = 0.1 > and dclocal_read_repair_chance = 0.0 > and gc_grace = 864000 > and min_compaction_threshold = 4 > and max_compaction_threshold = 32 > and replicate_on_write = true > and compaction_strategy = 'SizeTieredCompactionStrategy' > and caching = 'keys_only'; > > > Log messages > > INFO [FlushWriter:9] 2012-07-04 19:56:00,783 Memtable.java (line 266) Writing > Memtable-content@240294142(3955135/49439187 serialized/live bytes, 91 ops) > INFO [FlushWriter:9] 2012-07-04 19:56:00,814 Memtable.java (line 307) > Completed flushing > /var/lib/cassandra/data/largeobjects/content/largeobjects-content-h > d-1608-Data.db (1991862 bytes) for commitlog position > ReplayPosition(segmentId=24245436475633, position=78253718) > INFO [OptionalTasks:1] 2012-07-04 19:56:02,784 MeteredFlusher.java (line 62) > flushing high-traffic column family CFS(Keyspace='largeobjects', > ColumnFamily=' > content') (estimated 46971537 bytes) > INFO [OptionalTasks:1] 2012-07-04 19:56:02,784 ColumnFamilyStore.java (line > 633) Enqueuing flush of Memtable-content@1755783901(3757723/46971537 > serialized/ > live bytes, 121 ops) > INFO [FlushWriter:9] 2012-07-04 19:56:02,785 Memtable.java (line 266) Writing > Memtable-content@1755783901(3757723/46971537 serialized/live bytes, 121 ops) > INFO [FlushWriter:9] 2012-07-04 19:56:02,835 Memtable.java (line 307) > Completed flushing > /var/lib/cassandra/data/largeobjects/content/largeobjects-content-h > d-1609-Data.db (1894897 bytes) for commitlog position > ReplayPosition(segmentId=24245436475633, position=82028986) > INFO [OptionalTasks:1] 2012-07-04 19:56:04,785 MeteredFlusher.java (line 62) > flushing high-traffic column family CFS(Keyspace='largeobjects', > ColumnFamily=' > content') (estimated 56971025 bytes) > INFO [OptionalTasks:1] 2012-07-04 19:56:04,785 ColumnFamilyStore.java (line > 633) Enqueuing flush of Memtable-content@1441175031(4557682/56971025 > serialized/ > live bytes, 124 ops) > INFO [FlushWriter:9] 2012-07-04 19:56:04,786 Memtable.java (line 266) Writing > Memtable-content@1441175031(4557682/56971025 serialized/live bytes, 124 ops) > INFO [FlushWriter:9] 2012-07-04 19:56:04,814 Memtable.java (line 307) > Completed flushing > /var/lib/cassandra/data/largeobjects/content/largeobjects-content-h > d-1610-Data.db (2287280 bytes) for commitlog position > ReplayPosition(segmentId=24245436475633, position=86604648) > INFO [CompactionExecutor:39] 2012-07-04 19:56:04,815 CompactionTask.java > (line 109) Compacting > [SSTableReader(path='/var/lib/cassandra/data/largeobjects/con > tent/largeobjects-content-hd-1610-Data.db'), > SSTableReader(path='/var/lib/cassandra/data/largeobjects/content/largeobjects-content-hd-1608-Data.db'), > SSTable > Reader(path='/var/lib/cassandra/data/largeobjects/content/largeobjects-content-hd-1609-Data.db'), > SSTableReader(path='/var/lib/cassandra/data/largeobjects/co > ntent/largeobjects-content-hd-1607-Data.db')] > INFO [OptionalTasks:1] 2012-07-04 19:56:05,786 MeteredFlusher.java (line 62) > flushing high-traffic column family CFS(Keyspace='largeobjects', > ColumnFamily=' > content') (estimated 28300225 bytes) > INFO [OptionalTasks:1] 2012-07-04 19:56:05,786 ColumnFamilyStore.java (line > 633) Enqueuing flush of Memtable-content@1828084851(2264018/28300225 > serialized/ > live bytes, 38 ops) > INFO [FlushWriter:9] 2012-07-04 19:56:05,787 Memtable.java (line 266) Writing > Memtable-content@1828084851(2264018/28300225 serialized/live bytes, 38 ops) > INFO [FlushWriter:9] 2012-07-04 19:56:05,823 Memtable.java (line 307) > Completed flushing > /var/lib/cassandra/data/largeobjects/content/largeobjects-content-h > d-1612-Data.db (1134604 bytes) for commitlog position > ReplayPosition(segmentId=24245436475633, position=88874176) > ERROR [CompactionExecutor:39] 2012-07-04 19:56:06,667 > AbstractCassandraDaemon.java (line 134) Exception in thread > Thread[CompactionExecutor:39,1,main] > java.io.IOError: org.apache.cassandra.io.compress.CorruptedBlockException: > (/var/lib/cassandra/data/largeobjects/content/largeobjects-content-hd-1610-Data.db > ): corruption detected, chunk at 1573104 of length 65545. > at > org.apache.cassandra.db.compaction.PrecompactedRow.merge(PrecompactedRow.java:116) > at > org.apache.cassandra.db.compaction.PrecompactedRow.<init>(PrecompactedRow.java:99) > at > org.apache.cassandra.db.compaction.CompactionController.getCompactedRow(CompactionController.java:164) > at > org.apache.cassandra.db.compaction.CompactionIterable$Reducer.getReduced(CompactionIterable.java:83) > at > org.apache.cassandra.db.compaction.CompactionIterable$Reducer.getReduced(CompactionIterable.java:68) > at > org.apache.cassandra.utils.MergeIterator$ManyToOne.consume(MergeIterator.java:118) > at > org.apache.cassandra.utils.MergeIterator$ManyToOne.computeNext(MergeIterator.java:101) > at > com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:140) > at > com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:135) > at com.google.common.collect.Iterators$7.computeNext(Iterators.java:614) > at > com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:140) > at > com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:135) > at > org.apache.cassandra.db.compaction.CompactionTask.execute(CompactionTask.java:173) > at > org.apache.cassandra.db.compaction.CompactionManager$1.runMayThrow(CompactionManager.java:150) > at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:30) > at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) > at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) > at java.util.concurrent.FutureTask.run(FutureTask.java:166) > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) > at java.lang.Thread.run(Thread.java:679) > Caused by: org.apache.cassandra.io.compress.CorruptedBlockException: > (/var/lib/cassandra/data/largeobjects/content/largeobjects-content-hd-1610-Data.db): > cor > ruption detected, chunk at 1573104 of length 65545. > at > org.apache.cassandra.io.compress.CompressedRandomAccessReader.decompressChunk(CompressedRandomAccessReader.java:98) > at > org.apache.cassandra.io.compress.CompressedRandomAccessReader.reBuffer(CompressedRandomAccessReader.java:77) > at > org.apache.cassandra.io.util.RandomAccessReader.read(RandomAccessReader.java:302) > at java.io.RandomAccessFile.readFully(RandomAccessFile.java:414) > at java.io.RandomAccessFile.readFully(RandomAccessFile.java:394) > at > org.apache.cassandra.utils.BytesReadTracker.readFully(BytesReadTracker.java:95) > at org.apache.cassandra.utils.ByteBufferUtil.read(ByteBufferUtil.java:401) > at > org.apache.cassandra.utils.ByteBufferUtil.readWithLength(ByteBufferUtil.java:363) > at > org.apache.cassandra.db.ColumnSerializer.deserialize(ColumnSerializer.java:119) > at > org.apache.cassandra.db.ColumnSerializer.deserialize(ColumnSerializer.java:36) > at > org.apache.cassandra.db.ColumnFamilySerializer.deserializeColumns(ColumnFamilySerializer.java:144) > at > org.apache.cassandra.io.sstable.SSTableIdentityIterator.getColumnFamilyWithColumns(SSTableIdentityIterator.java:234) > at > org.apache.cassandra.db.compaction.PrecompactedRow.merge(PrecompactedRow.java:112) > ... 20 more > INFO [OptionalTasks:1] 2012-07-04 19:57:00,796 MeteredFlusher.java (line 62) > flushing high-traffic column family CFS(Keyspace='largeobjects', > ColumnFamily=' > content') (estimated 38711275 bytes) > INFO [OptionalTasks:1] 2012-07-04 19:57:00,796 ColumnFamilyStore.java (line > 633) Enqueuing flush of Memtable-content@1363920595(3096902/38711275 > serialized/ > live bytes, 74 ops) > INFO [FlushWriter:9] 2012-07-04 19:57:00,796 Memtable.java (line 266) Writing > Memtable-content@1363920595(3096902/38711275 serialized/live bytes, 74 ops) > INFO [FlushWriter:9] 2012-07-04 19:57:00,821 Memtable.java (line 307) > Completed flushing > /var/lib/cassandra/data/largeobjects/content/largeobjects-content-h > d-1613-Data.db (1553451 bytes) for commitlog position > ReplayPosition(segmentId=24245436475633, position=91981808) > INFO [CompactionExecutor:40] 2012-07-04 19:57:00,822 CompactionTask.java > (line 109) Compacting > [SSTableReader(path='/var/lib/cassandra/data/largeobjects/con > tent/largeobjects-content-hd-1610-Data.db'), > SSTableReader(path='/var/lib/cassandra/data/largeobjects/content/largeobjects-content-hd-1613-Data.db'), > SSTable > Reader(path='/var/lib/cassandra/data/largeobjects/content/largeobjects-content-hd-1608-Data.db'), > SSTableReader(path='/var/lib/cassandra/data/largeobjects/co > ntent/largeobjects-content-hd-1609-Data.db'), > SSTableReader(path='/var/lib/cassandra/data/largeobjects/content/largeobjects-content-hd-1607-Data.db'), > SSTabl > eReader(path='/var/lib/cassandra/data/largeobjects/content/largeobjects-content-hd-1612-Data.db')] > INFO [OptionalTasks:1] 2012-07-04 19:57:01,797 MeteredFlusher.java (line 62) > flushing high-traffic column family CFS(Keyspace='largeobjects', > ColumnFamily=' > content') (estimated 27750950 bytes) > INFO [OptionalTasks:1] 2012-07-04 19:57:01,797 ColumnFamilyStore.java (line > 633) Enqueuing flush of Memtable-content@289600485(2220076/27750950 > serialized/l > ive bytes, 70 ops) > INFO [FlushWriter:9] 2012-07-04 19:57:01,797 Memtable.java (line 266) Writing > Memtable-content@289600485(2220076/27750950 serialized/live bytes, 70 ops) > INFO [FlushWriter:9] 2012-07-04 19:57:01,819 Memtable.java (line 307) > Completed flushing > /var/lib/cassandra/data/largeobjects/content/largeobjects-content-h > d-1615-Data.db (1114538 bytes) for commitlog position > ReplayPosition(segmentId=24245436475633, position=94212034) > ERROR [ReadStage:263] 2012-07-04 19:57:02,599 AbstractCassandraDaemon.java > (line 134) Exception in thread Thread[ReadStage:263,5,main] > java.lang.RuntimeException: java.lang.RuntimeException: error reading 1 of 1 > at > org.apache.cassandra.service.StorageProxy$DroppableRunnable.run(StorageProxy.java:1254) > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) > at java.lang.Thread.run(Thread.java:679) > Caused by: java.lang.RuntimeException: error reading 1 of 1 > at > org.apache.cassandra.db.columniterator.SimpleSliceReader.computeNext(SimpleSliceReader.java:83) > at > org.apache.cassandra.db.columniterator.SimpleSliceReader.computeNext(SimpleSliceReader.java:39) > at > com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:140) > at > com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:135) > at > org.apache.cassandra.db.columniterator.SSTableSliceIterator.hasNext(SSTableSliceIterator.java:108) > at > org.apache.cassandra.utils.MergeIterator$Candidate.advance(MergeIterator.java:147) > at > org.apache.cassandra.utils.MergeIterator$ManyToOne.<init>(MergeIterator.java:90) > at org.apache.cassandra.utils.MergeIterator.get(MergeIterator.java:47) > at > org.apache.cassandra.db.filter.QueryFilter.collateColumns(QueryFilter.java:137) > at > org.apache.cassandra.db.CollationController.collectAllData(CollationController.java:283) > at > org.apache.cassandra.db.CollationController.getTopLevelColumns(CollationController.java:63) > at > org.apache.cassandra.db.ColumnFamilyStore.getTopLevelColumns(ColumnFamilyStore.java:1321) > > >
