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HADOOP-17166. ABFS: configure output stream thread pool (#2179)

Browse Source 
Adds the options to control the size of the per-output-stream threadpool
when writing data through the abfs connector

* fs.azure.write.max.concurrent.requests
* fs.azure.write.max.requests.to.queue

Contributed by Bilahari T H
This commit is contained in:
bilaharith 2020-09-09 21:11:36 +05:30 committed by GitHub
parent 773ac799c6
commit 85119267be
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GPG Key ID: 4AEE18F83AFDEB23
8 changed files with 163 additions and 3 deletions
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22
hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/AbfsConfiguration.java
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@ -86,6 +86,14 @@ public class AbfsConfiguration{
DefaultValue = DEFAULT_FS_AZURE_ACCOUNT_IS_HNS_ENABLED)
private String isNamespaceEnabledAccount;
@IntegerConfigurationValidatorAnnotation(ConfigurationKey = AZURE_WRITE_MAX_CONCURRENT_REQUESTS,
DefaultValue = -1)
private int writeMaxConcurrentRequestCount;
@IntegerConfigurationValidatorAnnotation(ConfigurationKey = AZURE_WRITE_MAX_REQUESTS_TO_QUEUE,
DefaultValue = -1)
private int maxWriteRequestsToQueue;
@IntegerConfigurationValidatorAnnotation(ConfigurationKey = AZURE_WRITE_BUFFER_SIZE,
MinValue = MIN_BUFFER_SIZE,
MaxValue = MAX_BUFFER_SIZE,
@ -822,6 +830,20 @@ public ExponentialRetryPolicy getOauthTokenFetchRetryPolicy() {
oauthTokenFetchRetryDeltaBackoff);
}
public int getWriteMaxConcurrentRequestCount() {
if (this.writeMaxConcurrentRequestCount < 1) {
return 4 * Runtime.getRuntime().availableProcessors();
}
return this.writeMaxConcurrentRequestCount;
}
public int getMaxWriteRequestsToQueue() {
if (this.maxWriteRequestsToQueue < 1) {
return 2 * getWriteMaxConcurrentRequestCount();
}
return this.maxWriteRequestsToQueue;
}
@VisibleForTesting
void setReadBufferSize(int bufferSize) {
this.readBufferSize = bufferSize;

2
hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/AzureBlobFileSystemStore.java
View File

@ -490,6 +490,8 @@ private AbfsOutputStreamContext populateAbfsOutputStreamContext(boolean isAppend
.disableOutputStreamFlush(abfsConfiguration.isOutputStreamFlushDisabled())
.withStreamStatistics(new AbfsOutputStreamStatisticsImpl())
.withAppendBlob(isAppendBlob)
.withWriteMaxConcurrentRequestCount(abfsConfiguration.getWriteMaxConcurrentRequestCount())
.withMaxWriteRequestsToQueue(abfsConfiguration.getMaxWriteRequestsToQueue())
.build();
}

2
hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/constants/ConfigurationKeys.java
View File

@ -52,6 +52,8 @@ public final class ConfigurationKeys {
public static final String AZURE_OAUTH_TOKEN_FETCH_RETRY_DELTA_BACKOFF = "fs.azure.oauth.token.fetch.retry.delta.backoff";
// Read and write buffer sizes defined by the user
public static final String AZURE_WRITE_MAX_CONCURRENT_REQUESTS = "fs.azure.write.max.concurrent.requests";
public static final String AZURE_WRITE_MAX_REQUESTS_TO_QUEUE = "fs.azure.write.max.requests.to.queue";
public static final String AZURE_WRITE_BUFFER_SIZE = "fs.azure.write.request.size";
public static final String AZURE_READ_BUFFER_SIZE = "fs.azure.read.request.size";
public static final String AZURE_BLOCK_SIZE_PROPERTY_NAME = "fs.azure.block.size";

18
hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/services/AbfsOutputStream.java
View File

@ -70,6 +70,7 @@ public class AbfsOutputStream extends OutputStream implements Syncable, StreamCa
private byte[] buffer;
private int bufferIndex;
private final int maxConcurrentRequestCount;
private final int maxRequestsThatCanBeQueued;
private ConcurrentLinkedDeque<WriteOperation> writeOperations;
private final ThreadPoolExecutor threadExecutor;
@ -119,8 +120,11 @@ public AbfsOutputStream(
if (this.isAppendBlob) {
this.maxConcurrentRequestCount = 1;
} else {
this.maxConcurrentRequestCount = 4 * Runtime.getRuntime().availableProcessors();
this.maxConcurrentRequestCount = abfsOutputStreamContext
.getWriteMaxConcurrentRequestCount();
}
this.maxRequestsThatCanBeQueued = abfsOutputStreamContext
.getMaxWriteRequestsToQueue();
this.threadExecutor
= new ThreadPoolExecutor(maxConcurrentRequestCount,
maxConcurrentRequestCount,
@ -371,7 +375,7 @@ private synchronized void writeCurrentBufferToService() throws IOException {
final long offset = position;
position += bytesLength;
if (threadExecutor.getQueue().size() >= maxConcurrentRequestCount * 2) {
if (threadExecutor.getQueue().size() >= maxRequestsThatCanBeQueued) {
long start = System.currentTimeMillis();
waitForTaskToComplete();
outputStreamStatistics.timeSpentTaskWait(start, System.currentTimeMillis());
@ -543,6 +547,16 @@ public int getWriteOperationsSize() {
return writeOperations.size();
}
@VisibleForTesting
int getMaxConcurrentRequestCount() {
return this.maxConcurrentRequestCount;
}
@VisibleForTesting
int getMaxRequestsThatCanBeQueued() {
return maxRequestsThatCanBeQueued;
}
/**
* Appending AbfsOutputStream statistics to base toString().
*

24
hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azurebfs/services/AbfsOutputStreamContext.java
View File

@ -33,6 +33,10 @@ public class AbfsOutputStreamContext extends AbfsStreamContext {
private boolean isAppendBlob;
private int writeMaxConcurrentRequestCount;
private int maxWriteRequestsToQueue;
public AbfsOutputStreamContext(final long sasTokenRenewPeriodForStreamsInSeconds) {
super(sasTokenRenewPeriodForStreamsInSeconds);
}
@ -71,6 +75,18 @@ public AbfsOutputStreamContext build() {
return this;
}
public AbfsOutputStreamContext withWriteMaxConcurrentRequestCount(
final int writeMaxConcurrentRequestCount) {
this.writeMaxConcurrentRequestCount = writeMaxConcurrentRequestCount;
return this;
}
public AbfsOutputStreamContext withMaxWriteRequestsToQueue(
final int maxWriteRequestsToQueue) {
this.maxWriteRequestsToQueue = maxWriteRequestsToQueue;
return this;
}
public int getWriteBufferSize() {
return writeBufferSize;
}
@ -90,4 +106,12 @@ public AbfsOutputStreamStatistics getStreamStatistics() {
public boolean isAppendBlob() {
return isAppendBlob;
}
public int getWriteMaxConcurrentRequestCount() {
return this.writeMaxConcurrentRequestCount;
}
public int getMaxWriteRequestsToQueue() {
return this.maxWriteRequestsToQueue;
}
}

13
hadoop-tools/hadoop-azure/src/site/markdown/abfs.md
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@ -796,6 +796,19 @@ will be -1. To disable readaheads, set this value to 0. If your workload is
doing only random reads (non-sequential) or you are seeing throttling, you
may try setting this value to 0.
To run under limited memory situations configure the following. Especially
when there are too many writes from the same process.
`fs.azure.write.max.concurrent.requests`: To set the maximum concurrent
write requests from an AbfsOutputStream instance to server at any point of
time. Effectively this will be the threadpool size within the
AbfsOutputStream instance. Set the value in between 1 to 8 both inclusive.
`fs.azure.write.max.requests.to.queue`: To set the maximum write requests
that can be queued. Memory consumption of AbfsOutputStream instance can be
tuned with this config considering each queued request holds a buffer. Set
the value 3 or 4 times the value set for s.azure.write.max.concurrent.requests.
### <a name="securityconfigoptions"></a> Security Options
`fs.azure.always.use.https`: Enforces to use HTTPS instead of HTTP when the flag
is made true. Irrespective of the flag, AbfsClient will use HTTPS if the secure

78
hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azurebfs/services/ITestAbfsOutputStream.java Normal file
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@ -0,0 +1,78 @@
/**
* 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
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* 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.hadoop.fs.azurebfs.services;
import org.assertj.core.api.Assertions;
import org.junit.Test;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.azurebfs.AbstractAbfsIntegrationTest;
import org.apache.hadoop.fs.azurebfs.AzureBlobFileSystem;
import org.apache.hadoop.fs.azurebfs.constants.ConfigurationKeys;
/**
* Test create operation.
*/
public class ITestAbfsOutputStream extends AbstractAbfsIntegrationTest {
private static final Path TEST_FILE_PATH = new Path("testfile");
public ITestAbfsOutputStream() throws Exception {
super();
}
@Test
public void testMaxRequestsAndQueueCapacityDefaults() throws Exception {
Configuration conf = getRawConfiguration();
final AzureBlobFileSystem fs = getFileSystem(conf);
try (FSDataOutputStream out = fs.create(TEST_FILE_PATH)) {
AbfsOutputStream stream = (AbfsOutputStream) out.getWrappedStream();
Assertions.assertThat(stream.getMaxConcurrentRequestCount()).describedAs(
"maxConcurrentRequests should be " + getConfiguration()
.getWriteMaxConcurrentRequestCount())
.isEqualTo(getConfiguration().getWriteMaxConcurrentRequestCount());
Assertions.assertThat(stream.getMaxRequestsThatCanBeQueued()).describedAs(
"maxRequestsToQueue should be " + getConfiguration()
.getMaxWriteRequestsToQueue())
.isEqualTo(getConfiguration().getMaxWriteRequestsToQueue());
}
}
@Test
public void testMaxRequestsAndQueueCapacity() throws Exception {
Configuration conf = getRawConfiguration();
int maxConcurrentRequests = 6;
int maxRequestsToQueue = 10;
conf.set(ConfigurationKeys.AZURE_WRITE_MAX_CONCURRENT_REQUESTS,
"" + maxConcurrentRequests);
conf.set(ConfigurationKeys.AZURE_WRITE_MAX_REQUESTS_TO_QUEUE,
"" + maxRequestsToQueue);
final AzureBlobFileSystem fs = getFileSystem(conf);
FSDataOutputStream out = fs.create(TEST_FILE_PATH);
AbfsOutputStream stream = (AbfsOutputStream) out.getWrappedStream();
Assertions.assertThat(stream.getMaxConcurrentRequestCount())
.describedAs("maxConcurrentRequests should be " + maxConcurrentRequests)
.isEqualTo(maxConcurrentRequests);
Assertions.assertThat(stream.getMaxRequestsThatCanBeQueued())
.describedAs("maxRequestsToQueue should be " + maxRequestsToQueue)
.isEqualTo(maxRequestsToQueue);
}
}

7
hadoop-tools/hadoop-azure/src/test/java/org/apache/hadoop/fs/azurebfs/services/TestAbfsOutputStream.java
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@ -18,6 +18,7 @@
package org.apache.hadoop.fs.azurebfs.services;
import java.io.IOException;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Random;
@ -54,13 +55,17 @@ public final class TestAbfsOutputStream {
private AbfsOutputStreamContext populateAbfsOutputStreamContext(int writeBufferSize,
boolean isFlushEnabled,
boolean disableOutputStreamFlush,
boolean isAppendBlob) {
boolean isAppendBlob) throws IOException, IllegalAccessException {
AbfsConfiguration abfsConf = new AbfsConfiguration(new Configuration(),
accountName1);
return new AbfsOutputStreamContext(2)
.withWriteBufferSize(writeBufferSize)
.enableFlush(isFlushEnabled)
.disableOutputStreamFlush(disableOutputStreamFlush)
.withStreamStatistics(new AbfsOutputStreamStatisticsImpl())
.withAppendBlob(isAppendBlob)
.withWriteMaxConcurrentRequestCount(abfsConf.getWriteMaxConcurrentRequestCount())
.withMaxWriteRequestsToQueue(abfsConf.getMaxWriteRequestsToQueue())
.build();
}