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HADOOP-18227. Add input stream IOStats for vectored IO api in S3A. (#4636)

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part of HADOOP-18103.

Contributed By: Mukund Thakur
This commit is contained in:
Mukund Thakur 2022-07-28 21:57:37 +05:30 committed by GitHub
parent bf570bd4ac
commit a5b12c8010
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10 changed files with 303 additions and 35 deletions
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30
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/statistics/StreamStatisticNames.java
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@ -47,7 +47,7 @@ public final class StreamStatisticNames {
public static final String STREAM_READ_ABORTED = "stream_aborted";
/**
* Bytes read from an input stream in read() calls.
* Bytes read from an input stream in read()/readVectored() calls.
* Does not include bytes read and then discarded in seek/close etc.
* These are the bytes returned to the caller.
* Value: {@value}.
@ -110,6 +110,34 @@ public final class StreamStatisticNames {
public static final String STREAM_READ_OPERATIONS =
"stream_read_operations";
/**
* Count of readVectored() operations in an input stream.
* Value: {@value}.
*/
public static final String STREAM_READ_VECTORED_OPERATIONS =
"stream_read_vectored_operations";
/**
* Count of bytes discarded during readVectored() operation
* in an input stream.
* Value: {@value}.
*/
public static final String STREAM_READ_VECTORED_READ_BYTES_DISCARDED =
"stream_read_vectored_read_bytes_discarded";
/**
* Count of incoming file ranges during readVectored() operation.
* Value: {@value}
*/
public static final String STREAM_READ_VECTORED_INCOMING_RANGES =
"stream_read_vectored_incoming_ranges";
/**
* Count of combined file ranges during readVectored() operation.
* Value: {@value}
*/
public static final String STREAM_READ_VECTORED_COMBINED_RANGES =
"stream_read_vectored_combined_ranges";
/**
* Count of incomplete read() operations in an input stream,
* that is, when the bytes returned were less than that requested.

11
hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/fs/contract/AbstractContractVectoredReadTest.java
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@ -84,6 +84,10 @@ public IntFunction<ByteBuffer> getAllocate() {
return allocate;
}
public WeakReferencedElasticByteBufferPool getPool() {
return pool;
}
@Override
public void setup() throws Exception {
super.setup();
@ -382,6 +386,13 @@ protected List<FileRange> getSampleOverlappingRanges() {
return fileRanges;
}
protected List<FileRange> getConsecutiveRanges() {
List<FileRange> fileRanges = new ArrayList<>();
fileRanges.add(FileRange.createFileRange(100, 500));
fileRanges.add(FileRange.createFileRange(600, 500));
return fileRanges;
}
/**
* Validate that exceptions must be thrown during a vectored
* read operation with specific input ranges.

6
hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AInputStream.java
View File

@ -963,7 +963,6 @@ public int maxReadSizeForVectorReads() {
@Override
public void readVectored(List<? extends FileRange> ranges,
IntFunction<ByteBuffer> allocate) throws IOException {
LOG.debug("Starting vectored read on path {} for ranges {} ", pathStr, ranges);
checkNotClosed();
if (stopVectoredIOOperations.getAndSet(false)) {
@ -978,6 +977,7 @@ public void readVectored(List<? extends FileRange> ranges,
if (isOrderedDisjoint(sortedRanges, 1, minSeekForVectorReads())) {
LOG.debug("Not merging the ranges as they are disjoint");
streamStatistics.readVectoredOperationStarted(sortedRanges.size(), sortedRanges.size());
for (FileRange range: sortedRanges) {
ByteBuffer buffer = allocate.apply(range.getLength());
unboundedThreadPool.submit(() -> readSingleRange(range, buffer));
@ -987,6 +987,7 @@ public void readVectored(List<? extends FileRange> ranges,
List<CombinedFileRange> combinedFileRanges = mergeSortedRanges(sortedRanges,
1, minSeekForVectorReads(),
maxReadSizeForVectorReads());
streamStatistics.readVectoredOperationStarted(sortedRanges.size(), combinedFileRanges.size());
LOG.debug("Number of original ranges size {} , Number of combined ranges {} ",
ranges.size(), combinedFileRanges.size());
for (CombinedFileRange combinedFileRange: combinedFileRanges) {
@ -1088,6 +1089,7 @@ private void drainUnnecessaryData(S3ObjectInputStream objectContent, long drainQ
}
drainBytes += readCount;
}
streamStatistics.readVectoredBytesDiscarded(drainBytes);
LOG.debug("{} bytes drained from stream ", drainBytes);
}
@ -1168,6 +1170,8 @@ private void populateBuffer(int length,
} else {
readByteArray(objectContent, buffer.array(), 0, length);
}
// update io stats.
incrementBytesRead(length);
}
/**

29
hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/S3AInstrumentation.java
View File

@ -803,6 +803,10 @@ private final class InputStreamStatistics
private final AtomicLong readOperations;
private final AtomicLong readFullyOperations;
private final AtomicLong seekOperations;
private final AtomicLong readVectoredOperations;
private final AtomicLong bytesDiscardedInVectoredIO;
private final AtomicLong readVectoredIncomingRanges;
private final AtomicLong readVectoredCombinedRanges;
/** Bytes read by the application and any when draining streams . */
private final AtomicLong totalBytesRead;
@ -836,6 +840,10 @@ private InputStreamStatistics(
StreamStatisticNames.STREAM_READ_SEEK_BYTES_SKIPPED,
StreamStatisticNames.STREAM_READ_TOTAL_BYTES,
StreamStatisticNames.STREAM_READ_UNBUFFERED,
StreamStatisticNames.STREAM_READ_VECTORED_COMBINED_RANGES,
StreamStatisticNames.STREAM_READ_VECTORED_INCOMING_RANGES,
StreamStatisticNames.STREAM_READ_VECTORED_OPERATIONS,
StreamStatisticNames.STREAM_READ_VECTORED_READ_BYTES_DISCARDED,
StreamStatisticNames.STREAM_READ_VERSION_MISMATCHES)
.withGauges(STREAM_READ_GAUGE_INPUT_POLICY)
.withDurationTracking(ACTION_HTTP_GET_REQUEST,
@ -872,6 +880,14 @@ private InputStreamStatistics(
StreamStatisticNames.STREAM_READ_OPERATIONS_INCOMPLETE);
readOperations = st.getCounterReference(
StreamStatisticNames.STREAM_READ_OPERATIONS);
readVectoredOperations = st.getCounterReference(
StreamStatisticNames.STREAM_READ_VECTORED_OPERATIONS);
bytesDiscardedInVectoredIO = st.getCounterReference(
StreamStatisticNames.STREAM_READ_VECTORED_READ_BYTES_DISCARDED);
readVectoredIncomingRanges = st.getCounterReference(
StreamStatisticNames.STREAM_READ_VECTORED_INCOMING_RANGES);
readVectoredCombinedRanges = st.getCounterReference(
StreamStatisticNames.STREAM_READ_VECTORED_COMBINED_RANGES);
readFullyOperations = st.getCounterReference(
StreamStatisticNames.STREAM_READ_FULLY_OPERATIONS);
seekOperations = st.getCounterReference(
@ -1017,6 +1033,19 @@ public void readOperationCompleted(int requested, int actual) {
}
}
@Override
public void readVectoredOperationStarted(int numIncomingRanges,
int numCombinedRanges) {
readVectoredIncomingRanges.addAndGet(numIncomingRanges);
readVectoredCombinedRanges.addAndGet(numCombinedRanges);
readVectoredOperations.incrementAndGet();
}
@Override
public void readVectoredBytesDiscarded(int discarded) {
bytesDiscardedInVectoredIO.addAndGet(discarded);
}
/**
* {@code close()} merges the stream statistics into the filesystem's
* instrumentation instance.

14
hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/statistics/S3AInputStreamStatistics.java
View File

@ -96,6 +96,20 @@ void streamClose(boolean abortedConnection,
*/
void readOperationCompleted(int requested, int actual);
/**
* A vectored read operation has started..
* @param numIncomingRanges number of input ranges.
* @param numCombinedRanges number of combined ranges.
*/
void readVectoredOperationStarted(int numIncomingRanges,
int numCombinedRanges);
/**
* Number of bytes discarded during vectored read.
* @param discarded discarded bytes during vectored read.
*/
void readVectoredBytesDiscarded(int discarded);
@Override
void close();

11
hadoop-tools/hadoop-aws/src/main/java/org/apache/hadoop/fs/s3a/statistics/impl/EmptyS3AStatisticsContext.java
View File

@ -195,6 +195,17 @@ public void readOperationCompleted(final int requested, final int actual) {
}
@Override
public void readVectoredOperationStarted(int numIncomingRanges,
int numCombinedRanges) {
}
@Override
public void readVectoredBytesDiscarded(int discarded) {
}
@Override
public void close() {

171
hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/contract/s3a/ITestS3AContractVectoredRead.java
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@ -19,28 +19,41 @@
package org.apache.hadoop.fs.contract.s3a;
import java.io.EOFException;
import java.io.IOException;
import java.io.InterruptedIOException;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CompletableFuture;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FileRange;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.contract.AbstractContractVectoredReadTest;
import org.apache.hadoop.fs.contract.AbstractFSContract;
import org.apache.hadoop.fs.s3a.Constants;
import org.apache.hadoop.fs.s3a.S3AFileSystem;
import org.apache.hadoop.fs.s3a.S3ATestUtils;
import org.apache.hadoop.fs.statistics.IOStatistics;
import org.apache.hadoop.fs.statistics.StoreStatisticNames;
import org.apache.hadoop.fs.statistics.StreamStatisticNames;
import org.apache.hadoop.test.LambdaTestUtils;
import static org.apache.hadoop.fs.contract.ContractTestUtils.returnBuffersToPoolPostRead;
import static org.apache.hadoop.fs.contract.ContractTestUtils.validateVectoredReadResult;
import static org.apache.hadoop.fs.statistics.IOStatisticAssertions.verifyStatisticCounterValue;
import static org.apache.hadoop.fs.statistics.IOStatisticsLogging.ioStatisticsToPrettyString;
import static org.apache.hadoop.test.MoreAsserts.assertEqual;
public class ITestS3AContractVectoredRead extends AbstractContractVectoredReadTest {
private static final Logger LOG = LoggerFactory.getLogger(ITestS3AContractVectoredRead.class);
public ITestS3AContractVectoredRead(String bufferType) {
super(bufferType);
}
@ -156,4 +169,162 @@ public void testSameRanges() throws Exception {
List<FileRange> fileRanges = getSampleSameRanges();
verifyExceptionalVectoredRead(fs, fileRanges, UnsupportedOperationException.class);
}
/**
* As the minimum seek value is 4*1024, the first three ranges will be
* merged into and other two will remain as it is.
* */
@Test
public void testNormalReadVsVectoredReadStatsCollection() throws Exception {
FileSystem fs = getTestFileSystemWithReadAheadDisabled();
List<FileRange> fileRanges = new ArrayList<>();
fileRanges.add(FileRange.createFileRange(10 * 1024, 100));
fileRanges.add(FileRange.createFileRange(8 * 1024, 100));
fileRanges.add(FileRange.createFileRange(14 * 1024, 100));
fileRanges.add(FileRange.createFileRange(2 * 1024 - 101, 100));
fileRanges.add(FileRange.createFileRange(40 * 1024, 1024));
FileStatus fileStatus = fs.getFileStatus(path(VECTORED_READ_FILE_NAME));
CompletableFuture<FSDataInputStream> builder =
fs.openFile(path(VECTORED_READ_FILE_NAME))
.withFileStatus(fileStatus)
.build();
try (FSDataInputStream in = builder.get()) {
in.readVectored(fileRanges, getAllocate());
validateVectoredReadResult(fileRanges, DATASET);
returnBuffersToPoolPostRead(fileRanges, getPool());
// audit the io statistics for this stream
IOStatistics st = in.getIOStatistics();
LOG.info("IOStats after readVectored operation {}", ioStatisticsToPrettyString(st));
// the vectored io operation must be tracked
verifyStatisticCounterValue(st,
StreamStatisticNames.STREAM_READ_VECTORED_OPERATIONS,
1);
// the vectored io operation is being called with 5 input ranges.
verifyStatisticCounterValue(st,
StreamStatisticNames.STREAM_READ_VECTORED_INCOMING_RANGES,
5);
// 5 input ranges got combined in 3 as some of them are close.
verifyStatisticCounterValue(st,
StreamStatisticNames.STREAM_READ_VECTORED_COMBINED_RANGES,
3);
// number of bytes discarded will be based on the above input ranges.
verifyStatisticCounterValue(st,
StreamStatisticNames.STREAM_READ_VECTORED_READ_BYTES_DISCARDED,
5944);
verifyStatisticCounterValue(st,
StoreStatisticNames.ACTION_HTTP_GET_REQUEST,
3);
// read bytes should match the sum of requested length for each input ranges.
verifyStatisticCounterValue(st,
StreamStatisticNames.STREAM_READ_BYTES,
1424);
}
CompletableFuture<FSDataInputStream> builder1 =
fs.openFile(path(VECTORED_READ_FILE_NAME))
.withFileStatus(fileStatus)
.build();
try (FSDataInputStream in = builder1.get()) {
for (FileRange range : fileRanges) {
byte[] temp = new byte[range.getLength()];
in.readFully((int) range.getOffset(), temp, 0, range.getLength());
}
// audit the statistics for this stream
IOStatistics st = in.getIOStatistics();
LOG.info("IOStats after read fully operation {}", ioStatisticsToPrettyString(st));
verifyStatisticCounterValue(st,
StreamStatisticNames.STREAM_READ_VECTORED_OPERATIONS,
0);
// all other counter values consistent.
verifyStatisticCounterValue(st,
StreamStatisticNames.STREAM_READ_VECTORED_READ_BYTES_DISCARDED,
0);
verifyStatisticCounterValue(st,
StoreStatisticNames.ACTION_HTTP_GET_REQUEST,
5);
// read bytes should match the sum of requested length for each input ranges.
verifyStatisticCounterValue(st,
StreamStatisticNames.STREAM_READ_BYTES,
1424);
}
}
@Test
public void testMultiVectoredReadStatsCollection() throws Exception {
FileSystem fs = getTestFileSystemWithReadAheadDisabled();
List<FileRange> ranges1 = getConsecutiveRanges();
List<FileRange> ranges2 = getConsecutiveRanges();
FileStatus fileStatus = fs.getFileStatus(path(VECTORED_READ_FILE_NAME));
CompletableFuture<FSDataInputStream> builder =
fs.openFile(path(VECTORED_READ_FILE_NAME))
.withFileStatus(fileStatus)
.build();
try (FSDataInputStream in = builder.get()) {
in.readVectored(ranges1, getAllocate());
in.readVectored(ranges2, getAllocate());
validateVectoredReadResult(ranges1, DATASET);
validateVectoredReadResult(ranges2, DATASET);
returnBuffersToPoolPostRead(ranges1, getPool());
returnBuffersToPoolPostRead(ranges2, getPool());
// audit the io statistics for this stream
IOStatistics st = in.getIOStatistics();
// 2 vectored io calls are made above.
verifyStatisticCounterValue(st,
StreamStatisticNames.STREAM_READ_VECTORED_OPERATIONS,
2);
// 2 vectored io operation is being called with 2 input ranges.
verifyStatisticCounterValue(st,
StreamStatisticNames.STREAM_READ_VECTORED_INCOMING_RANGES,
4);
// 2 ranges are getting merged in 1 during both vectored io operation.
verifyStatisticCounterValue(st,
StreamStatisticNames.STREAM_READ_VECTORED_COMBINED_RANGES,
2);
// number of bytes discarded will be 0 as the ranges are consecutive.
verifyStatisticCounterValue(st,
StreamStatisticNames.STREAM_READ_VECTORED_READ_BYTES_DISCARDED,
0);
// only 2 http get request will be made because ranges in both range list will be merged
// to 1 because they are consecutive.
verifyStatisticCounterValue(st,
StoreStatisticNames.ACTION_HTTP_GET_REQUEST,
2);
// read bytes should match the sum of requested length for each input ranges.
verifyStatisticCounterValue(st,
StreamStatisticNames.STREAM_READ_BYTES,
2000);
}
}
private FileSystem getTestFileSystemWithReadAheadDisabled() throws IOException {
Configuration conf = getFileSystem().getConf();
// also resetting the min seek and max size values is important
// as this same test suite has test which overrides these params.
S3ATestUtils.removeBaseAndBucketOverrides(conf,
Constants.READAHEAD_RANGE,
Constants.AWS_S3_VECTOR_READS_MAX_MERGED_READ_SIZE,
Constants.AWS_S3_VECTOR_READS_MIN_SEEK_SIZE);
S3ATestUtils.disableFilesystemCaching(conf);
conf.setInt(Constants.READAHEAD_RANGE, 0);
return S3ATestUtils.createTestFileSystem(conf);
}
}

31
hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/S3ATestUtils.java
View File

@ -41,6 +41,7 @@
import org.apache.hadoop.fs.s3a.impl.StoreContext;
import org.apache.hadoop.fs.s3a.impl.StoreContextBuilder;
import org.apache.hadoop.fs.s3a.statistics.BlockOutputStreamStatistics;
import org.apache.hadoop.fs.s3a.statistics.S3AInputStreamStatistics;
import org.apache.hadoop.fs.s3a.statistics.impl.EmptyS3AStatisticsContext;
import org.apache.hadoop.fs.s3native.S3xLoginHelper;
import org.apache.hadoop.io.DataInputBuffer;
@ -69,6 +70,7 @@
import java.io.Closeable;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.net.URISyntaxException;
import java.text.DateFormat;
@ -1457,4 +1459,33 @@ public static void skipIfEncryptionNotSet(Configuration configuration,
+ " in " + secrets);
}
}
/**
* Get the input stream statistics of an input stream.
* Raises an exception if the inner stream is not an S3A input stream
* @param in wrapper
* @return the statistics for the inner stream
*/
public static S3AInputStreamStatistics getInputStreamStatistics(
FSDataInputStream in) {
return getS3AInputStream(in).getS3AStreamStatistics();
}
/**
* Get the inner stream of an input stream.
* Raises an exception if the inner stream is not an S3A input stream
* @param in wrapper
* @return the inner stream
* @throws AssertionError if the inner stream is of the wrong type
*/
public static S3AInputStream getS3AInputStream(
FSDataInputStream in) {
InputStream inner = in.getWrappedStream();
if (inner instanceof S3AInputStream) {
return (S3AInputStream) inner;
} else {
throw new AssertionError("Not an S3AInputStream: " + inner);
}
}
}

2
hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/scale/ITestS3AInputStreamPerformance.java
View File

@ -56,6 +56,8 @@
import static org.apache.hadoop.fs.contract.ContractTestUtils.*;
import static org.apache.hadoop.fs.s3a.Constants.*;
import static org.apache.hadoop.fs.s3a.S3ATestUtils.assume;
import static org.apache.hadoop.fs.s3a.S3ATestUtils.getInputStreamStatistics;
import static org.apache.hadoop.fs.s3a.S3ATestUtils.getS3AInputStream;
import static org.apache.hadoop.fs.statistics.IOStatisticAssertions.assertThatStatisticMinimum;
import static org.apache.hadoop.fs.statistics.IOStatisticAssertions.lookupMaximumStatistic;
import static org.apache.hadoop.fs.statistics.IOStatisticAssertions.lookupMeanStatistic;

33
hadoop-tools/hadoop-aws/src/test/java/org/apache/hadoop/fs/s3a/scale/S3AScaleTestBase.java
View File

@ -19,19 +19,14 @@
package org.apache.hadoop.fs.s3a.scale;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.s3a.AbstractS3ATestBase;
import org.apache.hadoop.fs.s3a.S3AInputStream;
import org.apache.hadoop.fs.s3a.S3ATestConstants;
import org.apache.hadoop.fs.s3a.Statistic;
import org.apache.hadoop.fs.s3a.statistics.S3AInputStreamStatistics;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.InputStream;
import static org.apache.hadoop.fs.s3a.S3ATestUtils.*;
import static org.apache.hadoop.fs.statistics.IOStatisticAssertions.lookupGaugeStatistic;
@ -154,34 +149,6 @@ protected int getTestTimeoutMillis() {
return getTestTimeoutSeconds() * 1000;
}
/**
* Get the input stream statistics of an input stream.
* Raises an exception if the inner stream is not an S3A input stream
* @param in wrapper
* @return the statistics for the inner stream
*/
protected S3AInputStreamStatistics getInputStreamStatistics(
FSDataInputStream in) {
return getS3AInputStream(in).getS3AStreamStatistics();
}
/**
* Get the inner stream of an input stream.
* Raises an exception if the inner stream is not an S3A input stream
* @param in wrapper
* @return the inner stream
* @throws AssertionError if the inner stream is of the wrong type
*/
protected S3AInputStream getS3AInputStream(
FSDataInputStream in) {
InputStream inner = in.getWrappedStream();
if (inner instanceof S3AInputStream) {
return (S3AInputStream) inner;
} else {
throw new AssertionError("Not an S3AInputStream: " + inner);
}
}
/**
* Get the gauge value of a statistic from the
* IOStatistics of the filesystem. Raises an assertion if