/**
* 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.hadoop.hbase.regionserver;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicLong;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HBaseTestingUtility;
import org.apache.hadoop.hbase.HColumnDescriptor;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.LargeTests;
import org.apache.hadoop.hbase.MultithreadedTestUtil.RepeatingTestThread;
import org.apache.hadoop.hbase.MultithreadedTestUtil.TestContext;
import org.apache.hadoop.hbase.TableExistsException;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.HConnection;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.hadoop.hbase.client.RegionServerCallable;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.client.ResultScanner;
import org.apache.hadoop.hbase.client.RpcRetryingCaller;
import org.apache.hadoop.hbase.client.RpcRetryingCallerFactory;
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.hbase.io.compress.Compression;
import org.apache.hadoop.hbase.io.compress.Compression.Algorithm;
import org.apache.hadoop.hbase.io.hfile.CacheConfig;
import org.apache.hadoop.hbase.io.hfile.HFile;
import org.apache.hadoop.hbase.io.hfile.HFileContext;
import org.apache.hadoop.hbase.io.hfile.HFileContextBuilder;
import org.apache.hadoop.hbase.protobuf.RequestConverter;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos;
import org.apache.hadoop.hbase.protobuf.generated.AdminProtos.CompactRegionRequest;
import org.apache.hadoop.hbase.protobuf.generated.ClientProtos.BulkLoadHFileRequest;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hbase.util.Pair;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import com.google.common.collect.Lists;
/**
* Tests bulk loading of HFiles and shows the atomicity or lack of atomicity of
* the region server's bullkLoad functionality.
*/
@Category(LargeTests.class)
public class TestHRegionServerBulkLoad {
final static Log LOG = LogFactory.getLog(TestHRegionServerBulkLoad.class);
private static HBaseTestingUtility UTIL = new HBaseTestingUtility();
private final static Configuration conf = UTIL.getConfiguration();
private final static byte[] QUAL = Bytes.toBytes("qual");
private final static int NUM_CFS = 10;
public static int BLOCKSIZE = 64 * 1024;
public static Algorithm COMPRESSION = Compression.Algorithm.NONE;
private final static byte[][] families = new byte[NUM_CFS][];
static {
for (int i = 0; i < NUM_CFS; i++) {
families[i] = Bytes.toBytes(family(i));
}
}
/**
* Create a rowkey compatible with
* {@link #createHFile(FileSystem, Path, byte[], byte[], byte[], int)}.
*/
public static byte[] rowkey(int i) {
return Bytes.toBytes(String.format("row_%08d", i));
}
static String family(int i) {
return String.format("family_%04d", i);
}
/**
* Create an HFile with the given number of rows with a specified value.
*/
public static void createHFile(FileSystem fs, Path path, byte[] family,
byte[] qualifier, byte[] value, int numRows) throws IOException {
HFileContext context = new HFileContextBuilder().withBlockSize(BLOCKSIZE)
.withCompression(COMPRESSION)
.build();
HFile.Writer writer = HFile
.getWriterFactory(conf, new CacheConfig(conf))
.withPath(fs, path)
.withFileContext(context)
.create();
long now = System.currentTimeMillis();
try {
// subtract 2 since iterateOnSplits doesn't include boundary keys
for (int i = 0; i < numRows; i++) {
KeyValue kv = new KeyValue(rowkey(i), family, qualifier, now, value);
writer.append(kv);
}
writer.appendFileInfo(StoreFile.BULKLOAD_TIME_KEY, Bytes.toBytes(now));
} finally {
writer.close();
}
}
/**
* Thread that does full scans of the table looking for any partially
* completed rows.
*
* Each iteration of this loads 10 hdfs files, which occupies 5 file open file
* handles. So every 10 iterations (500 file handles) it does a region
* compaction to reduce the number of open file handles.
*/
public static class AtomicHFileLoader extends RepeatingTestThread {
final AtomicLong numBulkLoads = new AtomicLong();
final AtomicLong numCompactions = new AtomicLong();
private String tableName;
public AtomicHFileLoader(String tableName, TestContext ctx,
byte targetFamilies[][]) throws IOException {
super(ctx);
this.tableName = tableName;
}
public void doAnAction() throws Exception {
long iteration = numBulkLoads.getAndIncrement();
Path dir = UTIL.getDataTestDirOnTestFS(String.format("bulkLoad_%08d",
iteration));
// create HFiles for different column families
FileSystem fs = UTIL.getTestFileSystem();
byte[] val = Bytes.toBytes(String.format("%010d", iteration));
final List<Pair<byte[], String>> famPaths = new ArrayList<Pair<byte[], String>>(
NUM_CFS);
for (int i = 0; i < NUM_CFS; i++) {
Path hfile = new Path(dir, family(i));
byte[] fam = Bytes.toBytes(family(i));
createHFile(fs, hfile, fam, QUAL, val, 1000);
famPaths.add(new Pair<byte[], String>(fam, hfile.toString()));
}
// bulk load HFiles
final HConnection conn = UTIL.getHBaseAdmin().getConnection();
TableName tbl = TableName.valueOf(tableName);
RegionServerCallable<Void> callable =
new RegionServerCallable<Void>(conn, tbl, Bytes.toBytes("aaa")) {
@Override
public Void call(int callTimeout) throws Exception {
LOG.debug("Going to connect to server " + getLocation() + " for row "
+ Bytes.toStringBinary(getRow()));
byte[] regionName = getLocation().getRegionInfo().getRegionName();
BulkLoadHFileRequest request =
RequestConverter.buildBulkLoadHFileRequest(famPaths, regionName, true);
getStub().bulkLoadHFile(null, request);
return null;
}
};
RpcRetryingCallerFactory factory = new RpcRetryingCallerFactory(conf);
RpcRetryingCaller<Void> caller = factory.<Void> newCaller();
caller.callWithRetries(callable, Integer.MAX_VALUE);
// Periodically do compaction to reduce the number of open file handles.
if (numBulkLoads.get() % 10 == 0) {
// 10 * 50 = 500 open file handles!
callable = new RegionServerCallable<Void>(conn, tbl, Bytes.toBytes("aaa")) {
@Override
public Void call(int callTimeout) throws Exception {
LOG.debug("compacting " + getLocation() + " for row "
+ Bytes.toStringBinary(getRow()));
AdminProtos.AdminService.BlockingInterface server =
conn.getAdmin(getLocation().getServerName());
CompactRegionRequest request =
RequestConverter.buildCompactRegionRequest(
getLocation().getRegionInfo().getRegionName(), true, null);
server.compactRegion(null, request);
numCompactions.incrementAndGet();
return null;
}
};
caller.callWithRetries(callable, Integer.MAX_VALUE);
}
}
}
/**
* Thread that does full scans of the table looking for any partially
* completed rows.
*/
public static class AtomicScanReader extends RepeatingTestThread {
byte targetFamilies[][];
HTable table;
AtomicLong numScans = new AtomicLong();
AtomicLong numRowsScanned = new AtomicLong();
String TABLE_NAME;
public AtomicScanReader(String TABLE_NAME, TestContext ctx,
byte targetFamilies[][]) throws IOException {
super(ctx);
this.TABLE_NAME = TABLE_NAME;
this.targetFamilies = targetFamilies;
table = new HTable(conf, TABLE_NAME);
}
public void doAnAction() throws Exception {
Scan s = new Scan();
for (byte[] family : targetFamilies) {
s.addFamily(family);
}
ResultScanner scanner = table.getScanner(s);
for (Result res : scanner) {
byte[] lastRow = null, lastFam = null, lastQual = null;
byte[] gotValue = null;
for (byte[] family : targetFamilies) {
byte qualifier[] = QUAL;
byte thisValue[] = res.getValue(family, qualifier);
if (gotValue != null && thisValue != null
&& !Bytes.equals(gotValue, thisValue)) {
StringBuilder msg = new StringBuilder();
msg.append("Failed on scan ").append(numScans)
.append(" after scanning ").append(numRowsScanned)
.append(" rows!\n");
msg.append("Current was " + Bytes.toString(res.getRow()) + "/"
+ Bytes.toString(family) + ":" + Bytes.toString(qualifier)
+ " = " + Bytes.toString(thisValue) + "\n");
msg.append("Previous was " + Bytes.toString(lastRow) + "/"
+ Bytes.toString(lastFam) + ":" + Bytes.toString(lastQual)
+ " = " + Bytes.toString(gotValue));
throw new RuntimeException(msg.toString());
}
lastFam = family;
lastQual = qualifier;
lastRow = res.getRow();
gotValue = thisValue;
}
numRowsScanned.getAndIncrement();
}
numScans.getAndIncrement();
}
}
/**
* Creates a table with given table name and specified number of column
* families if the table does not already exist.
*/
private void setupTable(String table, int cfs) throws IOException {
try {
LOG.info("Creating table " + table);
HTableDescriptor htd = new HTableDescriptor(TableName.valueOf(table));
for (int i = 0; i < 10; i++) {
htd.addFamily(new HColumnDescriptor(family(i)));
}
UTIL.getHBaseAdmin().createTable(htd);
} catch (TableExistsException tee) {
LOG.info("Table " + table + " already exists");
}
}
/**
* Atomic bulk load.
*/
@Test
public void testAtomicBulkLoad() throws Exception {
String TABLE_NAME = "atomicBulkLoad";
int millisToRun = 30000;
int numScanners = 50;
UTIL.startMiniCluster(1);
try {
runAtomicBulkloadTest(TABLE_NAME, millisToRun, numScanners);
} finally {
UTIL.shutdownMiniCluster();
}
}
void runAtomicBulkloadTest(String tableName, int millisToRun, int numScanners)
throws Exception {
setupTable(tableName, 10);
TestContext ctx = new TestContext(UTIL.getConfiguration());
AtomicHFileLoader loader = new AtomicHFileLoader(tableName, ctx, null);
ctx.addThread(loader);
List<AtomicScanReader> scanners = Lists.newArrayList();
for (int i = 0; i < numScanners; i++) {
AtomicScanReader scanner = new AtomicScanReader(tableName, ctx, families);
scanners.add(scanner);
ctx.addThread(scanner);
}
ctx.startThreads();
ctx.waitFor(millisToRun);
ctx.stop();
LOG.info("Loaders:");
LOG.info(" loaded " + loader.numBulkLoads.get());
LOG.info(" compations " + loader.numCompactions.get());
LOG.info("Scanners:");
for (AtomicScanReader scanner : scanners) {
LOG.info(" scanned " + scanner.numScans.get());
LOG.info(" verified " + scanner.numRowsScanned.get() + " rows");
}
}
/**
* Run test on an HBase instance for 5 minutes. This assumes that the table
* under test only has a single region.
*/
public static void main(String args[]) throws Exception {
try {
Configuration c = HBaseConfiguration.create();
TestHRegionServerBulkLoad test = new TestHRegionServerBulkLoad();
test.setConf(c);
test.runAtomicBulkloadTest("atomicTableTest", 5 * 60 * 1000, 50);
} finally {
System.exit(0); // something hangs (believe it is lru threadpool)
}
}
private void setConf(Configuration c) {
UTIL = new HBaseTestingUtility(c);
}
}