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* BLOCKED BY HOPSWORKS - 2580 *[HOPS-1621] Increased the row size of hdfs_xattrs table #857

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* BLOCKED BY HOPSWORKS - 2580 *[HOPS-1621] Increased the row size of hdfs_xattrs table #857

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189 changes: 189 additions & 0 deletions .../src/test/java/org/apache/hadoop/hdfs/server/namenode/TestXAttrBackwardCompatibility.java
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/*
* Copyright (C) 2021 LogicalClocks AB.
*
* Licensed 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.hdfs.server.namenode;

import io.hops.metadata.HdfsStorageFactory;
import io.hops.metadata.hdfs.dal.XAttrDataAccess;
import io.hops.metadata.hdfs.entity.StoredXAttr;
import io.hops.transaction.handler.HDFSOperationType;
import io.hops.transaction.handler.LightWeightRequestHandler;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hdfs.DFSConfigKeys;
import org.apache.hadoop.hdfs.DistributedFileSystem;
import org.apache.hadoop.hdfs.HdfsConfiguration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.junit.Test;

import java.io.IOException;
import java.util.Arrays;

import static org.junit.Assert.assertTrue;


/*
* After migrating to NDB 8 the row size of hdfs_xattrs has been increased to 30KB
* Here are some tests to make sure that hopsfs can read and write old data
*/
public class TestXAttrBackwardCompatibility {
final int OLD_MAX_XATTR_VALUE_ROW_SIZE = 13500;
final int NEW_MAX_XATTR_VALUE_ROW_SIZE = 29500;
final int XATTR_NAME_LENGTH = XAttrStorage.getMaxXAttrNameSize();

@Test
public void testBackwardComp1() throws Exception {
int initialMaxXattrSize, updatedMaxXattrSize, initialSize, updatedSize;

// dfs.namenode.fs-limits.max-xattr-size does not change
// overwrite xattr with large value
initialMaxXattrSize = 1024*1024;
updatedMaxXattrSize = initialMaxXattrSize;
initialSize = 64 * 1024;
updatedSize = 64 * 1024;
testBackwardComp(initialMaxXattrSize, // initial max xattrs size,
updatedMaxXattrSize, // updated max xattrs size,
initialSize, // initial data length
(int) Math.ceil((double) initialSize / OLD_MAX_XATTR_VALUE_ROW_SIZE),
updatedSize, // updated data length
(int) Math.ceil((double) updatedSize / NEW_MAX_XATTR_VALUE_ROW_SIZE)
);

// dfs.namenode.fs-limits.max-xattr-size does not change
// overwrite xattr with smaller value
initialMaxXattrSize = 1024*1024;
updatedMaxXattrSize = initialMaxXattrSize;
initialSize = 256 * 1024;
updatedSize = 64 * 1024;
testBackwardComp(initialMaxXattrSize, // initial max xattrs size,
updatedMaxXattrSize, // updated max xattrs size,
initialSize, // initial data length
(int) Math.ceil((double) initialSize / OLD_MAX_XATTR_VALUE_ROW_SIZE),
updatedSize, // updated data length
(int) Math.ceil((double) updatedSize / NEW_MAX_XATTR_VALUE_ROW_SIZE)
);


// dfs.namenode.fs-limits.max-xattr-size is increased
// overwrite xattr with larger value
initialMaxXattrSize = 1024*1024;
updatedMaxXattrSize = 2*initialMaxXattrSize;
initialSize = 256 * 1024;
updatedSize = updatedMaxXattrSize - XATTR_NAME_LENGTH;
testBackwardComp(initialMaxXattrSize, // initial max xattrs size,
updatedMaxXattrSize, // updated max xattrs size,
initialSize, // initial data length
(int) Math.ceil((double) initialSize / OLD_MAX_XATTR_VALUE_ROW_SIZE),
updatedSize, // updated data length
(int) Math.ceil((double) updatedSize / NEW_MAX_XATTR_VALUE_ROW_SIZE)
);


// dfs.namenode.fs-limits.max-xattr-size is increased
// overwrite xattr with smaller value
initialMaxXattrSize = 1024*1024;
updatedMaxXattrSize = 2*initialMaxXattrSize;
initialSize = initialMaxXattrSize - XATTR_NAME_LENGTH;
updatedSize = initialSize/2;
testBackwardComp(initialMaxXattrSize, // initial max xattrs size,
updatedMaxXattrSize, // updated max xattrs size,
initialSize, // initial data length
(int) Math.ceil((double) initialSize / OLD_MAX_XATTR_VALUE_ROW_SIZE),
updatedSize, // updated data length
(int) Math.ceil((double) updatedSize / NEW_MAX_XATTR_VALUE_ROW_SIZE)
);
}

public void testBackwardComp(int initialMaxXattrsSize, int updatedMaxXattrsSize,
int initialDataLen, int initialXattrRowsCount,
int updatedDataLen, int updatedXattrRowsCount) throws Exception {
MiniDFSCluster cluster = null;
Path dir0 = new Path("/dir0");
String name = "user.test";
byte[] initialValue = XAttrTestHelpers.generateRandomByteArray(initialDataLen);
byte[] updatedValue = XAttrTestHelpers.generateRandomByteArray(updatedDataLen);

StoredXAttr.MAX_XATTR_VALUE_ROW_SIZE = OLD_MAX_XATTR_VALUE_ROW_SIZE;
//----------- write some xattrs with older row size ------------
try {
Configuration conf = new HdfsConfiguration();
conf.setBoolean(DFSConfigKeys.DFS_NAMENODE_XATTRS_ENABLED_KEY, true);
conf.setInt(DFSConfigKeys.DFS_NAMENODE_MAX_XATTRS_PER_INODE_KEY, 5);
conf.setInt(DFSConfigKeys.DFS_NAMENODE_MAX_XATTR_SIZE_KEY, initialMaxXattrsSize);
cluster = new MiniDFSCluster.Builder(conf).numDataNodes(1).build();

DistributedFileSystem dfs = cluster.getFileSystem();
dfs.mkdirs(dir0);

// setXAttrs
dfs.setXAttr(dir0, name, initialValue);
checkXattrRowsCount(initialXattrRowsCount);

byte[] returnedValue = dfs.getXAttr(dir0, name);
assert Arrays.equals(initialValue, returnedValue);

} finally {
if (cluster != null) {
cluster.shutdown();
}
}

cluster = null;
StoredXAttr.MAX_XATTR_VALUE_ROW_SIZE = NEW_MAX_XATTR_VALUE_ROW_SIZE;
//----------- write some xattrs with older row size ------------
try {
Configuration conf = new HdfsConfiguration();
conf.setBoolean(DFSConfigKeys.DFS_NAMENODE_XATTRS_ENABLED_KEY, true);
conf.setInt(DFSConfigKeys.DFS_NAMENODE_MAX_XATTRS_PER_INODE_KEY, 5);
conf.setInt(DFSConfigKeys.DFS_NAMENODE_MAX_XATTR_SIZE_KEY, updatedMaxXattrsSize);
cluster = new MiniDFSCluster.Builder(conf).format(false).numDataNodes(1).build();

DistributedFileSystem dfs = cluster.getFileSystem();


//read the old data
checkXattrRowsCount(initialXattrRowsCount);
byte[] returnedValue = dfs.getXAttr(dir0, name);
assert Arrays.equals(initialValue, returnedValue);

// setXAttrs
dfs.setXAttr(dir0, name, updatedValue);
returnedValue = dfs.getXAttr(dir0, name);
assert Arrays.equals(updatedValue, returnedValue);
checkXattrRowsCount(updatedXattrRowsCount);

dfs.delete(dir0, true);
checkXattrRowsCount(0);
} finally {
if (cluster != null) {
cluster.shutdown();
}
}
}

void checkXattrRowsCount(int expected) throws IOException {
int got = (int) (new LightWeightRequestHandler(
HDFSOperationType.TEST) {
@Override
public Object performTask() throws IOException {
XAttrDataAccess da = (XAttrDataAccess) HdfsStorageFactory
.getDataAccess(XAttrDataAccess.class);
return da.count();
}
}.handle());

assertTrue("Expected: " + expected + " Got: " + got, got == expected);
}
}