| /** |
| * 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; |
| |
| import java.io.File; |
| import java.io.IOException; |
| |
| import org.apache.hadoop.fs.permission.FsPermission; |
| import org.apache.hadoop.fs.permission.PermissionStatus; |
| import org.apache.hadoop.hdfs.protocol.Block; |
| import org.apache.hadoop.hdfs.server.common.GenerationStamp; |
| import org.apache.hadoop.hdfs.server.common.Storage; |
| |
| /** |
| * |
| * CreateEditsLog |
| * Synopsis: CreateEditsLog -f numFiles StartingBlockId numBlocksPerFile |
| * [-r replicafactor] [-d editsLogDirectory] |
| * Default replication factor is 1 |
| * Default edits log directory is /tmp/EditsLogOut |
| * |
| * Create a name node's edits log in /tmp/EditsLogOut. |
| * The file /tmp/EditsLogOut/current/edits can be copied to a name node's |
| * dfs.namenode.name.dir/current direcotry and the name node can be started as usual. |
| * |
| * The files are created in /createdViaInjectingInEditsLog |
| * The file names contain the starting and ending blockIds; hence once can |
| * create multiple edits logs using this command using non overlapping |
| * block ids and feed the files to a single name node. |
| * |
| * See Also @link #DataNodeCluster for injecting a set of matching |
| * blocks created with this command into a set of simulated data nodes. |
| * |
| */ |
| |
| public class CreateEditsLog { |
| static final String BASE_PATH = "/createdViaInjectingInEditsLog"; |
| static final String EDITS_DIR = "/tmp/EditsLogOut"; |
| static String edits_dir = EDITS_DIR; |
| static final public long BLOCK_GENERATION_STAMP = |
| GenerationStamp.FIRST_VALID_STAMP; |
| |
| static void addFiles(FSEditLog editLog, int numFiles, short replication, |
| int blocksPerFile, long startingBlockId, |
| FileNameGenerator nameGenerator) { |
| |
| PermissionStatus p = new PermissionStatus("joeDoe", "people", |
| new FsPermission((short)0777)); |
| INodeDirectory dirInode = new INodeDirectory(p, 0L); |
| editLog.logMkDir(BASE_PATH, dirInode); |
| long blockSize = 10; |
| BlockInfo[] blocks = new BlockInfo[blocksPerFile]; |
| for (int iB = 0; iB < blocksPerFile; ++iB) { |
| blocks[iB] = |
| new BlockInfo(new Block(0, blockSize, BLOCK_GENERATION_STAMP), |
| replication); |
| } |
| |
| long currentBlockId = startingBlockId; |
| long bidAtSync = startingBlockId; |
| |
| for (int iF = 0; iF < numFiles; iF++) { |
| for (int iB = 0; iB < blocksPerFile; ++iB) { |
| blocks[iB].setBlockId(currentBlockId++); |
| } |
| |
| INodeFileUnderConstruction inode = new INodeFileUnderConstruction( |
| null, replication, 0, blockSize, blocks, p, "", "", null); |
| // Append path to filename with information about blockIDs |
| String path = "_" + iF + "_B" + blocks[0].getBlockId() + |
| "_to_B" + blocks[blocksPerFile-1].getBlockId() + "_"; |
| String filePath = nameGenerator.getNextFileName(""); |
| filePath = filePath + path; |
| // Log the new sub directory in edits |
| if ((iF % nameGenerator.getFilesPerDirectory()) == 0) { |
| String currentDir = nameGenerator.getCurrentDir(); |
| dirInode = new INodeDirectory(p, 0L); |
| editLog.logMkDir(currentDir, dirInode); |
| } |
| editLog.logOpenFile(filePath, inode); |
| editLog.logCloseFile(filePath, inode); |
| |
| if (currentBlockId - bidAtSync >= 2000) { // sync every 2K blocks |
| editLog.logSync(); |
| bidAtSync = currentBlockId; |
| } |
| } |
| System.out.println("Created edits log in directory " + edits_dir); |
| System.out.println(" containing " + |
| numFiles + " File-Creates, each file with " + blocksPerFile + " blocks"); |
| System.out.println(" blocks range: " + |
| startingBlockId + " to " + (currentBlockId-1)); |
| } |
| |
| static String usage = "Usage: createditlogs " + |
| " -f numFiles startingBlockIds NumBlocksPerFile [-r replicafactor] " + |
| "[-d editsLogDirectory]\n" + |
| " Default replication factor is 1\n" + |
| " Default edits log direcory is " + EDITS_DIR + "\n"; |
| |
| |
| |
| static void printUsageExit() { |
| System.out.println(usage); |
| System.exit(-1); |
| } |
| static void printUsageExit(String err) { |
| System.out.println(err); |
| printUsageExit(); |
| } |
| /** |
| * @param args |
| * @throws IOException |
| */ |
| public static void main(String[] args) |
| throws IOException { |
| |
| |
| |
| long startingBlockId = 1; |
| int numFiles = 0; |
| short replication = 1; |
| int numBlocksPerFile = 0; |
| |
| if (args.length == 0) { |
| printUsageExit(); |
| } |
| |
| for (int i = 0; i < args.length; i++) { // parse command line |
| if (args[i].equals("-h")) |
| printUsageExit(); |
| if (args[i].equals("-f")) { |
| if (i + 3 >= args.length || args[i+1].startsWith("-") || |
| args[i+2].startsWith("-") || args[i+3].startsWith("-")) { |
| printUsageExit( |
| "Missing num files, starting block and/or number of blocks"); |
| } |
| numFiles = Integer.parseInt(args[++i]); |
| startingBlockId = Integer.parseInt(args[++i]); |
| numBlocksPerFile = Integer.parseInt(args[++i]); |
| if (numFiles <=0 || numBlocksPerFile <= 0) { |
| printUsageExit("numFiles and numBlocksPerFile most be greater than 0"); |
| } |
| } else if (args[i].equals("-r") || args[i+1].startsWith("-")) { |
| if (i + 1 >= args.length) { |
| printUsageExit( |
| "Missing num files, starting block and/or number of blocks"); |
| } |
| replication = Short.parseShort(args[++i]); |
| } else if (args[i].equals("-d")) { |
| if (i + 1 >= args.length || args[i+1].startsWith("-")) { |
| printUsageExit("Missing edits logs directory"); |
| } |
| edits_dir = args[++i]; |
| } else { |
| printUsageExit(); |
| } |
| } |
| |
| |
| File editsLogDir = new File(edits_dir); |
| File subStructureDir = new File(edits_dir + "/" + |
| Storage.STORAGE_DIR_CURRENT); |
| if ( !editsLogDir.exists() ) { |
| if ( !editsLogDir.mkdir()) { |
| System.out.println("cannot create " + edits_dir); |
| System.exit(-1); |
| } |
| } |
| if ( !subStructureDir.exists() ) { |
| if ( !subStructureDir.mkdir()) { |
| System.out.println("cannot create subdirs of " + edits_dir); |
| System.exit(-1); |
| } |
| } |
| |
| FSImage fsImage = new FSImage(editsLogDir.getAbsoluteFile().toURI()); |
| FileNameGenerator nameGenerator = new FileNameGenerator(BASE_PATH, 100); |
| |
| FSEditLog editLog = fsImage.getEditLog(); |
| editLog.createEditLogFile(fsImage.getStorage().getFsEditName()); |
| editLog.open(); |
| addFiles(editLog, numFiles, replication, numBlocksPerFile, startingBlockId, |
| nameGenerator); |
| editLog.logSync(); |
| editLog.close(); |
| } |
| } |