HDFS-4131. Add capability to namenode to get snapshot diff. Contributed by Jing Zhao.
git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-2802@1440152 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Suresh Srinivas
parent
5988208b7d
commit
66ea187228
@ -130,3 +130,6 @@ Branch-2802 Snapshot (Unreleased)
|
||||
|
||||
HDFS-4432. Support INodeFileUnderConstructionWithSnapshot in FSImage
|
||||
saving/loading. (Jing Zhao via suresh)
|
||||
|
||||
HDFS-4131. Add capability to namenode to get snapshot diff. (Jing Zhao via
|
||||
suresh)
|
||||
|
||||
@ -138,7 +138,6 @@
|
||||
import org.apache.hadoop.hdfs.protocol.DirectoryListing;
|
||||
import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
|
||||
import org.apache.hadoop.hdfs.protocol.HdfsConstants;
|
||||
import org.apache.hadoop.hdfs.protocol.SnapshottableDirectoryStatus;
|
||||
import org.apache.hadoop.hdfs.protocol.HdfsConstants.DatanodeReportType;
|
||||
import org.apache.hadoop.hdfs.protocol.HdfsConstants.SafeModeAction;
|
||||
import org.apache.hadoop.hdfs.protocol.HdfsFileStatus;
|
||||
@ -146,6 +145,7 @@
|
||||
import org.apache.hadoop.hdfs.protocol.LocatedBlocks;
|
||||
import org.apache.hadoop.hdfs.protocol.QuotaExceededException;
|
||||
import org.apache.hadoop.hdfs.protocol.RecoveryInProgressException;
|
||||
import org.apache.hadoop.hdfs.protocol.SnapshottableDirectoryStatus;
|
||||
import org.apache.hadoop.hdfs.protocol.datatransfer.ReplaceDatanodeOnFailure;
|
||||
import org.apache.hadoop.hdfs.security.token.block.BlockTokenSecretManager;
|
||||
import org.apache.hadoop.hdfs.security.token.block.BlockTokenSecretManager.AccessMode;
|
||||
@ -178,6 +178,7 @@
|
||||
import org.apache.hadoop.hdfs.server.namenode.metrics.FSNamesystemMBean;
|
||||
import org.apache.hadoop.hdfs.server.namenode.metrics.NameNodeMetrics;
|
||||
import org.apache.hadoop.hdfs.server.namenode.snapshot.INodeDirectorySnapshottable;
|
||||
import org.apache.hadoop.hdfs.server.namenode.snapshot.INodeDirectorySnapshottable.SnapshotDiffReport;
|
||||
import org.apache.hadoop.hdfs.server.namenode.snapshot.INodeFileUnderConstructionWithSnapshot;
|
||||
import org.apache.hadoop.hdfs.server.namenode.snapshot.INodeFileWithSnapshot;
|
||||
import org.apache.hadoop.hdfs.server.namenode.snapshot.Snapshot;
|
||||
@ -5814,6 +5815,37 @@ public SnapshottableDirectoryStatus[] getSnapshottableDirListing()
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Compute the difference between two snapshots (or between a snapshot and the
|
||||
* current status) of a snapshottable directory.
|
||||
*
|
||||
* @param path The full path of the snapshottable directory.
|
||||
* @param fromSnapshot Name of the snapshot to calculate the diff from. Null
|
||||
* or empty string indicates the current tree.
|
||||
* @param toSnapshot Name of the snapshot to calculated the diff to. Null or
|
||||
* empty string indicates the current tree.
|
||||
* @return The difference between {@code fromSnapshot} and {@code toSnapshot},
|
||||
* i.e., applying difference to source will get target.
|
||||
* @throws IOException
|
||||
*/
|
||||
public SnapshotDiffReport getSnapshotDiffReport(String path,
|
||||
String fromSnapshot, String toSnapshot) throws IOException {
|
||||
SnapshotDiffReport diffs = null;
|
||||
readLock();
|
||||
try {
|
||||
checkOperation(OperationCategory.READ);
|
||||
diffs = snapshotManager.diff(path, fromSnapshot, toSnapshot);
|
||||
} finally {
|
||||
readUnlock();
|
||||
}
|
||||
|
||||
if (auditLog.isInfoEnabled() && isExternalInvocation()) {
|
||||
logAuditEvent(UserGroupInformation.getCurrentUser(), getRemoteIp(),
|
||||
"computeSnapshotDiff", null, null, null);
|
||||
}
|
||||
return diffs;
|
||||
}
|
||||
|
||||
/**
|
||||
* Delete a snapshot of a snapshottable directory
|
||||
* @param snapshotRoot The snapshottable directory
|
||||
|
||||
@ -622,6 +622,17 @@ int collectSubtreeBlocksAndClear(BlocksMapUpdateInfo info) {
|
||||
return total;
|
||||
}
|
||||
|
||||
/**
|
||||
* Compare the metadata with another INodeDirectory
|
||||
*/
|
||||
public boolean metadataEquals(INodeDirectory other) {
|
||||
return other != null && getNsQuota() == other.getNsQuota()
|
||||
&& getDsQuota() == other.getDsQuota()
|
||||
&& getUserName().equals(other.getUserName())
|
||||
&& getGroupName().equals(other.getGroupName())
|
||||
&& getFsPermission().equals(other.getFsPermission());
|
||||
}
|
||||
|
||||
/**
|
||||
* Used by
|
||||
* {@link INodeDirectory#getExistingPathINodes(byte[][], int, boolean)}.
|
||||
|
||||
@ -21,14 +21,19 @@
|
||||
import java.io.PrintWriter;
|
||||
import java.util.ArrayList;
|
||||
import java.util.Collections;
|
||||
import java.util.Comparator;
|
||||
import java.util.Iterator;
|
||||
import java.util.List;
|
||||
import java.util.Map;
|
||||
import java.util.SortedMap;
|
||||
import java.util.TreeMap;
|
||||
|
||||
import org.apache.hadoop.HadoopIllegalArgumentException;
|
||||
import org.apache.hadoop.classification.InterfaceAudience;
|
||||
import org.apache.hadoop.hdfs.DFSUtil;
|
||||
import org.apache.hadoop.hdfs.server.namenode.INode;
|
||||
import org.apache.hadoop.hdfs.server.namenode.INodeDirectory;
|
||||
import org.apache.hadoop.hdfs.server.namenode.snapshot.diff.Diff;
|
||||
import org.apache.hadoop.hdfs.util.ReadOnlyList;
|
||||
import org.apache.hadoop.util.Time;
|
||||
|
||||
@ -56,6 +61,76 @@ static public INodeDirectorySnapshottable valueOf(
|
||||
return (INodeDirectorySnapshottable)dir;
|
||||
}
|
||||
|
||||
/**
|
||||
* A class describing the difference between snapshots of a snapshottable
|
||||
* directory.
|
||||
*/
|
||||
public static class SnapshotDiffReport {
|
||||
public static final Comparator<INode> INODE_COMPARATOR =
|
||||
new Comparator<INode>() {
|
||||
@Override
|
||||
public int compare(INode left, INode right) {
|
||||
if (left == null) {
|
||||
return right == null ? 0 : -1;
|
||||
} else {
|
||||
return right == null ? 1 : left.compareTo(right.getLocalNameBytes());
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
/** The root directory of the snapshots */
|
||||
private final INodeDirectorySnapshottable snapshotRoot;
|
||||
/** The starting point of the difference */
|
||||
private final Snapshot from;
|
||||
/** The end point of the difference */
|
||||
private final Snapshot to;
|
||||
/**
|
||||
* A map capturing the detailed difference. Each key indicates a directory
|
||||
* whose metadata or children have been changed between the two snapshots,
|
||||
* while its associated value is a {@link Diff} storing the changes happened
|
||||
* to the children (files).
|
||||
*/
|
||||
private final SortedMap<INodeDirectoryWithSnapshot, ChildrenDiff> diffMap;
|
||||
|
||||
public SnapshotDiffReport(INodeDirectorySnapshottable snapshotRoot,
|
||||
Snapshot start, Snapshot end) {
|
||||
this.snapshotRoot = snapshotRoot;
|
||||
this.from = start;
|
||||
this.to = end;
|
||||
this.diffMap = new TreeMap<INodeDirectoryWithSnapshot, ChildrenDiff>(
|
||||
INODE_COMPARATOR);
|
||||
}
|
||||
|
||||
/** Add a dir-diff pair into {@link #diffMap} */
|
||||
public void addDiff(INodeDirectoryWithSnapshot dir, ChildrenDiff diff) {
|
||||
diffMap.put(dir, diff);
|
||||
}
|
||||
|
||||
/**
|
||||
* dump the diff
|
||||
*/
|
||||
public String dump() {
|
||||
StringBuilder strBuffer = new StringBuilder();
|
||||
String fromStr = from == null ? "current directory" : "snapshot "
|
||||
+ from.getRoot().getLocalName();
|
||||
String toStr = to == null ? "current directory" : "snapshot "
|
||||
+ to.getRoot().getLocalName();
|
||||
strBuffer.append("Diffence between snapshot " + fromStr + " and " + toStr
|
||||
+ " under directory " + snapshotRoot.getFullPathName() + ":\n");
|
||||
|
||||
if (!diffMap.isEmpty()) {
|
||||
for (Map.Entry<INodeDirectoryWithSnapshot, ChildrenDiff> entry : diffMap
|
||||
.entrySet()) {
|
||||
strBuffer.append("M\t" + entry.getKey().getFullPathName() + "\n");
|
||||
entry.getValue().printDiff(strBuffer, entry.getKey(),
|
||||
from == null ||
|
||||
(to != null && Snapshot.ID_COMPARATOR.compare(from, to) > 0));
|
||||
}
|
||||
}
|
||||
return strBuffer.toString();
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Snapshots of this directory in ascending order of snapshot names.
|
||||
* Note that snapshots in ascending order of snapshot id are stored in
|
||||
@ -229,6 +304,80 @@ private void deleteDiffsForSnapshot(Snapshot snapshot, INodeDirectory dir,
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Compute the difference between two snapshots (or a snapshot and the current
|
||||
* directory) of the directory.
|
||||
*
|
||||
* @param from The name of the start point of the comparison. Null indicating
|
||||
* the current tree.
|
||||
* @param to The name of the end point. Null indicating the current tree.
|
||||
* @return The difference between the start/end points.
|
||||
* @throws SnapshotException If there is no snapshot matching the starting
|
||||
* point, or if endSnapshotName is not null but cannot be identified
|
||||
* as a previous snapshot.
|
||||
*/
|
||||
SnapshotDiffReport computeDiff(final String from, final String to)
|
||||
throws SnapshotException {
|
||||
Snapshot fromSnapshot = getSnapshotByName(from);
|
||||
Snapshot toSnapshot = getSnapshotByName(to);
|
||||
SnapshotDiffReport diffs = new SnapshotDiffReport(this, fromSnapshot,
|
||||
toSnapshot);
|
||||
computeDiffInDir(this, diffs);
|
||||
return diffs;
|
||||
}
|
||||
|
||||
/**
|
||||
* Find the snapshot matching the given name.
|
||||
*
|
||||
* @param snapshotName The name of the snapshot.
|
||||
* @return The corresponding snapshot. Null if snapshotName is null or empty.
|
||||
* @throws SnapshotException If snapshotName is not null or empty, but there
|
||||
* is no snapshot matching the name.
|
||||
*/
|
||||
private Snapshot getSnapshotByName(String snapshotName)
|
||||
throws SnapshotException {
|
||||
Snapshot s = null;
|
||||
if (snapshotName != null && !snapshotName.isEmpty()) {
|
||||
final int index = searchSnapshot(DFSUtil.string2Bytes(snapshotName));
|
||||
if (index < 0) {
|
||||
throw new SnapshotException("Cannot find the snapshot of directory "
|
||||
+ this.getFullPathName() + " with name " + snapshotName);
|
||||
}
|
||||
s = snapshotsByNames.get(index);
|
||||
}
|
||||
return s;
|
||||
}
|
||||
|
||||
/**
|
||||
* Recursively compute the difference between snapshots under a given
|
||||
* directory.
|
||||
* @param dir The directory under which the diff is computed.
|
||||
* @param diffReport data structure used to store the diff.
|
||||
*/
|
||||
private void computeDiffInDir(INodeDirectory dir,
|
||||
SnapshotDiffReport diffReport) {
|
||||
ChildrenDiff diff = new ChildrenDiff();
|
||||
if (dir instanceof INodeDirectoryWithSnapshot) {
|
||||
boolean change = ((INodeDirectoryWithSnapshot) dir)
|
||||
.computeDiffBetweenSnapshots(diffReport.from,
|
||||
diffReport.to, diff);
|
||||
if (change) {
|
||||
diffReport.addDiff((INodeDirectoryWithSnapshot) dir,
|
||||
diff);
|
||||
}
|
||||
}
|
||||
ReadOnlyList<INode> children = dir.getChildrenList(null);
|
||||
for (INode child : children) {
|
||||
if (child instanceof INodeDirectory
|
||||
&& diff.searchCreated(child.getLocalNameBytes()) == null) {
|
||||
// Compute diff recursively for children that are directories. We do not
|
||||
// need to compute diff for those contained in the created list since
|
||||
// directory contained in the created list must be new created.
|
||||
computeDiffInDir((INodeDirectory) child, diffReport);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Replace itself with {@link INodeDirectoryWithSnapshot} or
|
||||
* {@link INodeDirectory} depending on the latest snapshot.
|
||||
|
||||
@ -25,6 +25,7 @@
|
||||
import java.util.List;
|
||||
import java.util.Map;
|
||||
|
||||
import org.apache.hadoop.fs.Path;
|
||||
import org.apache.hadoop.fs.permission.FsPermission;
|
||||
import org.apache.hadoop.hdfs.DFSUtil;
|
||||
import org.apache.hadoop.hdfs.server.namenode.FSImageSerialization;
|
||||
@ -50,7 +51,7 @@ public class INodeDirectoryWithSnapshot extends INodeDirectoryWithQuota {
|
||||
* of the children list of an INodeDirectory.
|
||||
*/
|
||||
public static class ChildrenDiff extends Diff<byte[], INode> {
|
||||
private ChildrenDiff() {}
|
||||
ChildrenDiff() {}
|
||||
|
||||
private ChildrenDiff(final List<INode> created, final List<INode> deleted) {
|
||||
super(created, deleted);
|
||||
@ -116,6 +117,59 @@ private List<INodeDirectory> getDirsInDeleted() {
|
||||
}
|
||||
return dirList;
|
||||
}
|
||||
|
||||
/**
|
||||
* Print out the content of the Diff. In general, "M"/"+"/"-" are used to
|
||||
* represent files/directories that were modified, created, and deleted,
|
||||
* respectively.
|
||||
*
|
||||
* @param str A StringBuilder used to storing the description of the Diff.
|
||||
* @param parent The directory that the Diff is about. Used to get the full
|
||||
* path of the INodes contained in the Diff.
|
||||
*/
|
||||
public void printDiff(StringBuilder str, INodeDirectoryWithSnapshot parent,
|
||||
boolean reverse) {
|
||||
final String mStr = "M\t";
|
||||
final String cStr = reverse ? "-\t" : "+\t";
|
||||
final String dStr = reverse ? "+\t" : "-\t";
|
||||
StringBuilder cBuffer = new StringBuilder();
|
||||
StringBuilder dBuffer = new StringBuilder();
|
||||
StringBuilder mBuffer = new StringBuilder();
|
||||
int c = 0;
|
||||
int d = 0;
|
||||
List<INode> created = getCreatedList();
|
||||
List<INode> deleted = getDeletedList();
|
||||
for (; c < created.size() && d < deleted.size(); ) {
|
||||
INode cnode = created.get(c);
|
||||
INode dnode = deleted.get(d);
|
||||
if (cnode.equals(dnode)) {
|
||||
mBuffer.append(mStr + parent.getFullPathName() + Path.SEPARATOR
|
||||
+ cnode.getLocalName() + "\n");
|
||||
c++;
|
||||
d++;
|
||||
} else if (cnode.compareTo(dnode.getLocalNameBytes()) < 0) {
|
||||
cBuffer.append(cStr + parent.getFullPathName() + Path.SEPARATOR
|
||||
+ cnode.getLocalName() + "\n");
|
||||
c++;
|
||||
} else {
|
||||
dBuffer.append(dStr + parent.getFullPathName() + Path.SEPARATOR
|
||||
+ dnode.getLocalName() + "\n");
|
||||
d++;
|
||||
}
|
||||
}
|
||||
for (; d < deleted.size(); d++) {
|
||||
dBuffer.append(dStr + parent.getFullPathName() + Path.SEPARATOR
|
||||
+ deleted.get(d).getLocalName() + "\n");
|
||||
}
|
||||
for (; c < created.size(); c++) {
|
||||
cBuffer.append(cStr + parent.getFullPathName() + Path.SEPARATOR
|
||||
+ created.get(c).getLocalName() + "\n");
|
||||
}
|
||||
|
||||
str.append(cBuffer);
|
||||
str.append(dBuffer);
|
||||
str.append(mBuffer);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
@ -325,6 +379,79 @@ public static INodeDirectoryWithSnapshot newInstance(INodeDirectory dir,
|
||||
return withSnapshot;
|
||||
}
|
||||
|
||||
/**
|
||||
* Compute the difference between Snapshots.
|
||||
*
|
||||
* @param fromSnapshot Start point of the diff computation. Null indicates
|
||||
* current tree.
|
||||
* @param toSnapshot End point of the diff computation. Null indicates current
|
||||
* tree.
|
||||
* @param diff Used to capture the changes happening to the children. Note
|
||||
* that the diff still represents (later_snapshot - earlier_snapshot)
|
||||
* although toSnapshot can be before fromSnapshot.
|
||||
* @return Whether changes happened between the startSnapshot and endSnaphsot.
|
||||
*/
|
||||
boolean computeDiffBetweenSnapshots(Snapshot fromSnapshot,
|
||||
Snapshot toSnapshot, ChildrenDiff diff) {
|
||||
Snapshot earlierSnapshot = fromSnapshot;
|
||||
Snapshot laterSnapshot = toSnapshot;
|
||||
if (fromSnapshot == null
|
||||
|| (toSnapshot != null && Snapshot.ID_COMPARATOR.compare(fromSnapshot,
|
||||
toSnapshot) > 0)) {
|
||||
earlierSnapshot = toSnapshot;
|
||||
laterSnapshot = fromSnapshot;
|
||||
}
|
||||
|
||||
int earlierDiffIndex = Collections.binarySearch(diffs, earlierSnapshot);
|
||||
if (earlierDiffIndex < 0 && (-earlierDiffIndex - 1) == diffs.size()) {
|
||||
// if the earlierSnapshot is after the latest SnapshotDiff stored in diffs,
|
||||
// no modification happened after the earlierSnapshot
|
||||
return false;
|
||||
}
|
||||
int laterDiffIndex = diffs.size();
|
||||
if (laterSnapshot != null) {
|
||||
laterDiffIndex = Collections.binarySearch(diffs, laterSnapshot);
|
||||
if (laterDiffIndex == -1 || laterDiffIndex == 0) {
|
||||
// if the endSnapshot is the earliest SnapshotDiff stored in
|
||||
// diffs, or before it, no modification happened before the endSnapshot
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
earlierDiffIndex = earlierDiffIndex < 0 ? (-earlierDiffIndex - 1)
|
||||
: earlierDiffIndex;
|
||||
laterDiffIndex = laterDiffIndex < 0 ? (-laterDiffIndex - 1)
|
||||
: laterDiffIndex;
|
||||
boolean dirMetadataChanged = false;
|
||||
INodeDirectory dirCopy = null;
|
||||
for (int i = earlierDiffIndex; i < laterDiffIndex; i++) {
|
||||
SnapshotDiff sdiff = diffs.get(i);
|
||||
diff.combinePosterior(sdiff.diff, null);
|
||||
if (dirMetadataChanged == false && sdiff.snapshotINode != null) {
|
||||
if (dirCopy == null) {
|
||||
dirCopy = sdiff.snapshotINode;
|
||||
} else {
|
||||
if (!dirCopy.metadataEquals(sdiff.snapshotINode)) {
|
||||
dirMetadataChanged = true;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (!diff.isEmpty() || dirMetadataChanged) {
|
||||
return true;
|
||||
} else if (dirCopy != null) {
|
||||
for (int i = laterDiffIndex; i < diffs.size(); i++) {
|
||||
if (diffs.get(i).snapshotINode != null
|
||||
&& !dirCopy.metadataEquals(diffs.get(i).snapshotINode)) {
|
||||
return true;
|
||||
}
|
||||
}
|
||||
return !dirCopy.metadataEquals(this);
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
/** Diff list sorted by snapshot IDs, i.e. in chronological order. */
|
||||
private final List<SnapshotDiff> diffs;
|
||||
|
||||
|
||||
@ -31,6 +31,7 @@
|
||||
import org.apache.hadoop.hdfs.server.namenode.INode.BlocksMapUpdateInfo;
|
||||
import org.apache.hadoop.hdfs.server.namenode.INodeDirectory;
|
||||
import org.apache.hadoop.hdfs.server.namenode.INodeDirectory.INodesInPath;
|
||||
import org.apache.hadoop.hdfs.server.namenode.snapshot.INodeDirectorySnapshottable.SnapshotDiffReport;
|
||||
|
||||
/**
|
||||
* Manage snapshottable directories and their snapshots.
|
||||
@ -233,4 +234,30 @@ public void removeSnapshottableDirs(
|
||||
this.snapshottables.removeAll(toRemoveList);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Compute the difference between two snapshots of a directory, or between a
|
||||
* snapshot of the directory and its current tree.
|
||||
*/
|
||||
public SnapshotDiffReport diff(final String path, final String from,
|
||||
final String to) throws IOException {
|
||||
if ((from == null || from.isEmpty())
|
||||
&& (to == null || to.isEmpty())) {
|
||||
// both fromSnapshot and toSnapshot indicate the current tree
|
||||
return null;
|
||||
}
|
||||
// if the start point is equal to the end point, return null
|
||||
if (from.equals(to)) {
|
||||
return null;
|
||||
}
|
||||
|
||||
// Find the source root directory path where the snapshots were taken.
|
||||
// All the check for path has been included in the valueOf method.
|
||||
INodesInPath inodesInPath = fsdir.getMutableINodesInPath(path.toString());
|
||||
final INodeDirectorySnapshottable snapshotRoot = INodeDirectorySnapshottable
|
||||
.valueOf(inodesInPath.getLastINode(), path);
|
||||
|
||||
return snapshotRoot.computeDiff(from, to);
|
||||
}
|
||||
|
||||
}
|
||||
@ -180,6 +180,12 @@ public E searchDeleted(final K name) {
|
||||
return d < 0 ? null : deleted.get(d);
|
||||
}
|
||||
|
||||
/** @return true if no changes contained in the diff */
|
||||
public boolean isEmpty() {
|
||||
return (created == null || created.isEmpty())
|
||||
&& (deleted == null || deleted.isEmpty());
|
||||
}
|
||||
|
||||
/**
|
||||
* Insert the element to created.
|
||||
* @param i the insertion point defined
|
||||
|
||||
@ -0,0 +1,198 @@
|
||||
/**
|
||||
* 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.hdfs.server.namenode.snapshot;
|
||||
|
||||
import static org.junit.Assert.assertFalse;
|
||||
import static org.junit.Assert.assertTrue;
|
||||
|
||||
import org.apache.hadoop.conf.Configuration;
|
||||
import org.apache.hadoop.fs.Path;
|
||||
import org.apache.hadoop.hdfs.DFSTestUtil;
|
||||
import org.apache.hadoop.hdfs.DistributedFileSystem;
|
||||
import org.apache.hadoop.hdfs.MiniDFSCluster;
|
||||
import org.apache.hadoop.hdfs.server.namenode.FSNamesystem;
|
||||
import org.apache.hadoop.hdfs.server.namenode.snapshot.INodeDirectorySnapshottable.SnapshotDiffReport;
|
||||
import org.junit.After;
|
||||
import org.junit.Before;
|
||||
import org.junit.Test;
|
||||
|
||||
/**
|
||||
* Tests snapshot deletion.
|
||||
*/
|
||||
public class TestSnapshotDiffReport {
|
||||
protected static final long seed = 0;
|
||||
protected static final short REPLICATION = 3;
|
||||
protected static final long BLOCKSIZE = 1024;
|
||||
public static final int SNAPSHOTNUMBER = 10;
|
||||
|
||||
private final Path dir = new Path("/TestSnapshot");
|
||||
private final Path sub1 = new Path(dir, "sub1");
|
||||
|
||||
protected Configuration conf;
|
||||
protected MiniDFSCluster cluster;
|
||||
protected FSNamesystem fsn;
|
||||
protected DistributedFileSystem hdfs;
|
||||
|
||||
private int snapshotNum = 0;
|
||||
|
||||
@Before
|
||||
public void setUp() throws Exception {
|
||||
conf = new Configuration();
|
||||
cluster = new MiniDFSCluster.Builder(conf).numDataNodes(REPLICATION)
|
||||
.format(true).build();
|
||||
cluster.waitActive();
|
||||
|
||||
fsn = cluster.getNamesystem();
|
||||
hdfs = cluster.getFileSystem();
|
||||
}
|
||||
|
||||
@After
|
||||
public void tearDown() throws Exception {
|
||||
if (cluster != null) {
|
||||
cluster.shutdown();
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Create/modify/delete files and create snapshots under a given directory.
|
||||
*/
|
||||
private void modifyAndCreateSnapshot(Path modifyDir, Path snapshotDir)
|
||||
throws Exception {
|
||||
Path file10 = new Path(modifyDir, "file10");
|
||||
Path file11 = new Path(modifyDir, "file11");
|
||||
Path file12 = new Path(modifyDir, "file12");
|
||||
Path file13 = new Path(modifyDir, "file13");
|
||||
Path file14 = new Path(modifyDir, "file14");
|
||||
Path file15 = new Path(modifyDir, "file15");
|
||||
DFSTestUtil.createFile(hdfs, file10, BLOCKSIZE, (short) (REPLICATION - 1),
|
||||
seed);
|
||||
DFSTestUtil.createFile(hdfs, file11, BLOCKSIZE, (short) (REPLICATION - 1),
|
||||
seed);
|
||||
DFSTestUtil.createFile(hdfs, file12, BLOCKSIZE, (short) (REPLICATION - 1),
|
||||
seed);
|
||||
DFSTestUtil.createFile(hdfs, file13, BLOCKSIZE, (short) (REPLICATION - 1),
|
||||
seed);
|
||||
// create snapshot s1
|
||||
hdfs.allowSnapshot(snapshotDir.toString());
|
||||
hdfs.createSnapshot(snapshotDir, "s" + snapshotNum++);
|
||||
|
||||
// delete file11
|
||||
hdfs.delete(file11, true);
|
||||
// modify file12
|
||||
hdfs.setReplication(file12, REPLICATION);
|
||||
// modify file13
|
||||
hdfs.setReplication(file13, REPLICATION);
|
||||
// create file14
|
||||
DFSTestUtil.createFile(hdfs, file14, BLOCKSIZE, REPLICATION, seed);
|
||||
// create file15
|
||||
DFSTestUtil.createFile(hdfs, file15, BLOCKSIZE, REPLICATION, seed);
|
||||
|
||||
// create snapshot s2
|
||||
hdfs.createSnapshot(snapshotDir, "s" + snapshotNum++);
|
||||
|
||||
// create file11 again
|
||||
DFSTestUtil.createFile(hdfs, file11, BLOCKSIZE, REPLICATION, seed);
|
||||
// delete file12
|
||||
hdfs.delete(file12, true);
|
||||
// modify file13
|
||||
hdfs.setReplication(file13, (short) (REPLICATION - 2));
|
||||
// delete file14
|
||||
hdfs.delete(file14, true);
|
||||
// modify file15
|
||||
hdfs.setReplication(file15, (short) (REPLICATION - 1));
|
||||
|
||||
// create snapshot s3 for dir
|
||||
hdfs.createSnapshot(snapshotDir, "s" + snapshotNum++);
|
||||
// modify file10
|
||||
hdfs.setReplication(file10, (short) (REPLICATION - 1));
|
||||
}
|
||||
|
||||
/**
|
||||
* Test the functionality of
|
||||
* {@link FSNamesystem#getSnapshotDiffReport(String, String, String)}.
|
||||
* TODO: without the definision of a DiffReport class, this test temporarily
|
||||
* check the output string of {@link SnapshotDiffReport#dump()}
|
||||
*/
|
||||
@Test
|
||||
public void testDiff() throws Exception {
|
||||
modifyAndCreateSnapshot(sub1, sub1);
|
||||
modifyAndCreateSnapshot(new Path(sub1, "subsub1/subsubsub1"), sub1);
|
||||
|
||||
SnapshotDiffReport diffs = fsn.getSnapshotDiffReport(sub1.toString(), "s0", "s2");
|
||||
String diffStr = diffs.dump();
|
||||
System.out.println(diffStr);
|
||||
|
||||
assertTrue(diffStr.contains("M\t/TestSnapshot/sub1"));
|
||||
assertTrue(diffStr.contains("+\t/TestSnapshot/sub1/file15"));
|
||||
assertTrue(diffStr.contains("-\t/TestSnapshot/sub1/file12"));
|
||||
assertTrue(diffStr.contains("M\t/TestSnapshot/sub1/file11"));
|
||||
assertTrue(diffStr.contains("M\t/TestSnapshot/sub1/file13"));
|
||||
assertFalse(diffStr.contains("file14"));
|
||||
|
||||
diffs = fsn.getSnapshotDiffReport(sub1.toString(), "s0", "s5");
|
||||
diffStr = diffs.dump();
|
||||
System.out.println(diffStr);
|
||||
|
||||
assertTrue(diffStr.contains("M\t/TestSnapshot/sub1"));
|
||||
assertTrue(diffStr.contains("+\t/TestSnapshot/sub1/file15"));
|
||||
assertTrue(diffStr.contains("+\t/TestSnapshot/sub1/subsub1"));
|
||||
assertTrue(diffStr.contains("-\t/TestSnapshot/sub1/file12"));
|
||||
assertTrue(diffStr.contains("M\t/TestSnapshot/sub1/file10"));
|
||||
assertTrue(diffStr.contains("M\t/TestSnapshot/sub1/file11"));
|
||||
assertTrue(diffStr.contains("M\t/TestSnapshot/sub1/file13"));
|
||||
assertFalse(diffStr.contains("file14"));
|
||||
|
||||
diffs = fsn.getSnapshotDiffReport(sub1.toString(), "s0", "");
|
||||
diffStr = diffs.dump();
|
||||
System.out.println(diffStr);
|
||||
|
||||
assertTrue(diffStr.contains("M\t/TestSnapshot/sub1"));
|
||||
assertTrue(diffStr.contains("+\t/TestSnapshot/sub1/file15"));
|
||||
assertTrue(diffStr.contains("+\t/TestSnapshot/sub1/subsub1"));
|
||||
assertTrue(diffStr.contains("-\t/TestSnapshot/sub1/file12"));
|
||||
assertTrue(diffStr.contains("M\t/TestSnapshot/sub1/file10"));
|
||||
assertTrue(diffStr.contains("M\t/TestSnapshot/sub1/file11"));
|
||||
assertTrue(diffStr.contains("M\t/TestSnapshot/sub1/file13"));
|
||||
assertFalse(diffStr.contains("file14"));
|
||||
|
||||
diffs = fsn.getSnapshotDiffReport(sub1.toString(), "s2", "s5");
|
||||
diffStr = diffs.dump();
|
||||
System.out.println(diffStr);
|
||||
|
||||
assertTrue(diffStr.contains("M\t/TestSnapshot/sub1"));
|
||||
assertTrue(diffStr.contains("+\t/TestSnapshot/sub1/subsub1"));
|
||||
assertTrue(diffStr.contains("M\t/TestSnapshot/sub1/file10"));
|
||||
|
||||
diffs = fsn.getSnapshotDiffReport(sub1.toString(), "s3", "");
|
||||
diffStr = diffs.dump();
|
||||
System.out.println(diffStr);
|
||||
|
||||
assertTrue(diffStr.contains("M\t/TestSnapshot/sub1"));
|
||||
assertTrue(diffStr.contains("M\t/TestSnapshot/sub1/subsub1/subsubsub1"));
|
||||
assertTrue(diffStr
|
||||
.contains("+\t/TestSnapshot/sub1/subsub1/subsubsub1/file15"));
|
||||
assertTrue(diffStr
|
||||
.contains("-\t/TestSnapshot/sub1/subsub1/subsubsub1/file12"));
|
||||
assertTrue(diffStr
|
||||
.contains("M\t/TestSnapshot/sub1/subsub1/subsubsub1/file10"));
|
||||
assertTrue(diffStr
|
||||
.contains("M\t/TestSnapshot/sub1/subsub1/subsubsub1/file11"));
|
||||
assertTrue(diffStr
|
||||
.contains("M\t/TestSnapshot/sub1/subsub1/subsubsub1/file13"));
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user