| /** |
| * 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.tools; |
| |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| |
| import java.util.ArrayList; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.TreeMap; |
| |
| import javax.security.auth.login.LoginException; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FSDataInputStream; |
| import org.apache.hadoop.fs.FSDataOutputStream; |
| import org.apache.hadoop.fs.FileStatus; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.HarFileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.fs.permission.FsPermission; |
| import org.apache.hadoop.io.IntWritable; |
| import org.apache.hadoop.io.LongWritable; |
| import org.apache.hadoop.io.SequenceFile; |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.mapred.FileInputFormat; |
| import org.apache.hadoop.mapred.FileOutputFormat; |
| import org.apache.hadoop.mapred.FileSplit; |
| import org.apache.hadoop.mapred.InputFormat; |
| import org.apache.hadoop.mapred.InputSplit; |
| import org.apache.hadoop.mapred.JobClient; |
| import org.apache.hadoop.mapred.JobConf; |
| import org.apache.hadoop.mapred.Mapper; |
| import org.apache.hadoop.mapred.OutputCollector; |
| import org.apache.hadoop.mapred.RecordReader; |
| import org.apache.hadoop.mapred.Reducer; |
| import org.apache.hadoop.mapred.SequenceFileRecordReader; |
| import org.apache.hadoop.mapred.Reporter; |
| import org.apache.hadoop.mapred.lib.NullOutputFormat; |
| import org.apache.hadoop.mapreduce.Cluster; |
| import org.apache.hadoop.mapreduce.Job; |
| import org.apache.hadoop.mapreduce.JobContext; |
| import org.apache.hadoop.mapreduce.JobSubmissionFiles; |
| import org.apache.hadoop.security.UnixUserGroupInformation; |
| import org.apache.hadoop.security.UserGroupInformation; |
| import org.apache.hadoop.util.Tool; |
| import org.apache.hadoop.util.ToolRunner; |
| |
| |
| /** |
| * a archive creation utility. |
| * This class provides methods that can be used |
| * to create hadoop archives. For understanding of |
| * Hadoop archives look at {@link HarFileSystem}. |
| */ |
| public class HadoopArchives implements Tool { |
| private static final Log LOG = LogFactory.getLog(HadoopArchives.class); |
| |
| private static final String NAME = "har"; |
| static final String SRC_LIST_LABEL = NAME + ".src.list"; |
| static final String DST_DIR_LABEL = NAME + ".dest.path"; |
| static final String TMP_DIR_LABEL = NAME + ".tmp.dir"; |
| static final String JOB_DIR_LABEL = NAME + ".job.dir"; |
| static final String SRC_COUNT_LABEL = NAME + ".src.count"; |
| static final String TOTAL_SIZE_LABEL = NAME + ".total.size"; |
| static final String DST_HAR_LABEL = NAME + ".archive.name"; |
| static final String SRC_PARENT_LABEL = NAME + ".parent.path"; |
| // size of each part file |
| // its fixed for now. |
| static final long partSize = 2 * 1024 * 1024 * 1024l; |
| |
| private static final String usage = "archive" |
| + " -archiveName NAME -p <parent path> <src>* <dest>" + |
| "\n"; |
| |
| |
| private JobConf conf; |
| |
| public void setConf(Configuration conf) { |
| if (conf instanceof JobConf) { |
| this.conf = (JobConf) conf; |
| } else { |
| this.conf = new JobConf(conf, HadoopArchives.class); |
| } |
| } |
| |
| public Configuration getConf() { |
| return this.conf; |
| } |
| |
| public HadoopArchives(Configuration conf) { |
| setConf(conf); |
| } |
| |
| // check the src paths |
| private static void checkPaths(Configuration conf, List<Path> paths) throws |
| IOException { |
| for (Path p : paths) { |
| FileSystem fs = p.getFileSystem(conf); |
| if (!fs.exists(p)) { |
| throw new FileNotFoundException("Source " + p + " does not exist."); |
| } |
| } |
| } |
| |
| /** |
| * this assumes that there are two types of files file/dir |
| * @param fs the input filesystem |
| * @param p the top level path |
| * @param out the list of paths output of recursive ls |
| * @throws IOException |
| */ |
| private void recursivels(FileSystem fs, Path p, List<FileStatus> out) |
| throws IOException { |
| FileStatus fstatus = fs.getFileStatus(p); |
| if (!fstatus.isDir()) { |
| out.add(fstatus); |
| return; |
| } |
| else { |
| out.add(fstatus); |
| FileStatus[] listStatus = fs.listStatus(p); |
| for (FileStatus stat: listStatus) { |
| recursivels(fs, stat.getPath(), out); |
| } |
| } |
| } |
| |
| /** |
| * Input format of a hadoop archive job responsible for |
| * generating splits of the file list |
| */ |
| |
| static class HArchiveInputFormat implements InputFormat<LongWritable, Text> { |
| |
| //generate input splits from the src file lists |
| public InputSplit[] getSplits(JobConf jconf, int numSplits) |
| throws IOException { |
| String srcfilelist = jconf.get(SRC_LIST_LABEL, ""); |
| if ("".equals(srcfilelist)) { |
| throw new IOException("Unable to get the " + |
| "src file for archive generation."); |
| } |
| long totalSize = jconf.getLong(TOTAL_SIZE_LABEL, -1); |
| if (totalSize == -1) { |
| throw new IOException("Invalid size of files to archive"); |
| } |
| //we should be safe since this is set by our own code |
| Path src = new Path(srcfilelist); |
| FileSystem fs = src.getFileSystem(jconf); |
| FileStatus fstatus = fs.getFileStatus(src); |
| ArrayList<FileSplit> splits = new ArrayList<FileSplit>(numSplits); |
| LongWritable key = new LongWritable(); |
| Text value = new Text(); |
| SequenceFile.Reader reader = null; |
| // the remaining bytes in the file split |
| long remaining = fstatus.getLen(); |
| // the count of sizes calculated till now |
| long currentCount = 0L; |
| // the endposition of the split |
| long lastPos = 0L; |
| // the start position of the split |
| long startPos = 0L; |
| long targetSize = totalSize/numSplits; |
| // create splits of size target size so that all the maps |
| // have equals sized data to read and write to. |
| try { |
| reader = new SequenceFile.Reader(fs, src, jconf); |
| while(reader.next(key, value)) { |
| if (currentCount + key.get() > targetSize && currentCount != 0){ |
| long size = lastPos - startPos; |
| splits.add(new FileSplit(src, startPos, size, (String[]) null)); |
| remaining = remaining - size; |
| startPos = lastPos; |
| currentCount = 0L; |
| } |
| currentCount += key.get(); |
| lastPos = reader.getPosition(); |
| } |
| // the remaining not equal to the target size. |
| if (remaining != 0) { |
| splits.add(new FileSplit(src, startPos, remaining, (String[])null)); |
| } |
| } |
| finally { |
| reader.close(); |
| } |
| return splits.toArray(new FileSplit[splits.size()]); |
| } |
| |
| public RecordReader<LongWritable, Text> getRecordReader(InputSplit split, |
| JobConf job, Reporter reporter) throws IOException { |
| return new SequenceFileRecordReader<LongWritable, Text>(job, |
| (FileSplit)split); |
| } |
| } |
| |
| private boolean checkValidName(String name) { |
| Path tmp = new Path(name); |
| if (tmp.depth() != 1) { |
| return false; |
| } |
| if (name.endsWith(".har")) |
| return true; |
| return false; |
| } |
| |
| |
| private Path largestDepth(List<Path> paths) { |
| Path deepest = paths.get(0); |
| for (Path p: paths) { |
| if (p.depth() > deepest.depth()) { |
| deepest = p; |
| } |
| } |
| return deepest; |
| } |
| |
| /** |
| * truncate the prefix root from the full path |
| * @param fullPath the full path |
| * @param root the prefix root to be truncated |
| * @return the relative path |
| */ |
| private Path relPathToRoot(Path fullPath, Path root) { |
| // just take some effort to do it |
| // rather than just using substring |
| // so that we do not break sometime later |
| Path justRoot = new Path(Path.SEPARATOR); |
| if (fullPath.depth() == root.depth()) { |
| return justRoot; |
| } |
| else if (fullPath.depth() > root.depth()) { |
| Path retPath = new Path(fullPath.getName()); |
| Path parent = fullPath.getParent(); |
| for (int i=0; i < (fullPath.depth() - root.depth() -1); i++) { |
| retPath = new Path(parent.getName(), retPath); |
| parent = parent.getParent(); |
| } |
| return new Path(justRoot, retPath); |
| } |
| return null; |
| } |
| |
| /** |
| * this method writes all the valid top level directories |
| * into the srcWriter for indexing. This method is a little |
| * tricky. example- |
| * for an input with parent path /home/user/ and sources |
| * as /home/user/source/dir1, /home/user/source/dir2 - this |
| * will output <source, dir, dir1, dir2> (dir means that source is a dir |
| * with dir1 and dir2 as children) and <source/dir1, file, null> |
| * and <source/dir2, file, null> |
| * @param srcWriter the sequence file writer to write the |
| * directories to |
| * @param paths the source paths provided by the user. They |
| * are glob free and have full path (not relative paths) |
| * @param parentPath the parent path that you wnat the archives |
| * to be relative to. example - /home/user/dir1 can be archived with |
| * parent as /home or /home/user. |
| * @throws IOException |
| */ |
| private void writeTopLevelDirs(SequenceFile.Writer srcWriter, |
| List<Path> paths, Path parentPath) throws IOException { |
| //add all the directories |
| List<Path> justDirs = new ArrayList<Path>(); |
| for (Path p: paths) { |
| if (!p.getFileSystem(getConf()).isFile(p)) { |
| justDirs.add(new Path(p.toUri().getPath())); |
| } |
| else { |
| justDirs.add(new Path(p.getParent().toUri().getPath())); |
| } |
| } |
| /* find all the common parents of paths that are valid archive |
| * paths. The below is done so that we do not add a common path |
| * twice and also we need to only add valid child of a path that |
| * are specified the user. |
| */ |
| TreeMap<String, HashSet<String>> allpaths = new TreeMap<String, |
| HashSet<String>>(); |
| /* the largest depth of paths. the max number of times |
| * we need to iterate |
| */ |
| Path deepest = largestDepth(paths); |
| Path root = new Path(Path.SEPARATOR); |
| for (int i = parentPath.depth(); i < deepest.depth(); i++) { |
| List<Path> parents = new ArrayList<Path>(); |
| for (Path p: justDirs) { |
| if (p.compareTo(root) == 0){ |
| //do nothing |
| } |
| else { |
| Path parent = p.getParent(); |
| if (allpaths.containsKey(parent.toString())) { |
| HashSet<String> children = allpaths.get(parent.toString()); |
| children.add(p.getName()); |
| } |
| else { |
| HashSet<String> children = new HashSet<String>(); |
| children.add(p.getName()); |
| allpaths.put(parent.toString(), children); |
| } |
| parents.add(parent); |
| } |
| } |
| justDirs = parents; |
| } |
| Set<Map.Entry<String, HashSet<String>>> keyVals = allpaths.entrySet(); |
| for (Map.Entry<String, HashSet<String>> entry : keyVals) { |
| Path relPath = relPathToRoot(new Path(entry.getKey()), parentPath); |
| if (relPath != null) { |
| String toWrite = relPath + " dir "; |
| HashSet<String> children = entry.getValue(); |
| StringBuffer sbuff = new StringBuffer(); |
| sbuff.append(toWrite); |
| for (String child: children) { |
| sbuff.append(child + " "); |
| } |
| toWrite = sbuff.toString(); |
| srcWriter.append(new LongWritable(0L), new Text(toWrite)); |
| } |
| } |
| } |
| |
| /**archive the given source paths into |
| * the dest |
| * @param parentPath the parent path of all the source paths |
| * @param srcPaths the src paths to be archived |
| * @param dest the dest dir that will contain the archive |
| */ |
| void archive(Path parentPath, List<Path> srcPaths, |
| String archiveName, Path dest) throws IOException { |
| checkPaths(conf, srcPaths); |
| int numFiles = 0; |
| long totalSize = 0; |
| FileSystem fs = parentPath.getFileSystem(conf); |
| conf.set(DST_HAR_LABEL, archiveName); |
| conf.set(SRC_PARENT_LABEL, parentPath.makeQualified(fs).toString()); |
| Path outputPath = new Path(dest, archiveName); |
| FileOutputFormat.setOutputPath(conf, outputPath); |
| FileSystem outFs = outputPath.getFileSystem(conf); |
| if (outFs.exists(outputPath) || outFs.isFile(dest)) { |
| throw new IOException("Invalid Output: " + outputPath); |
| } |
| conf.set(DST_DIR_LABEL, outputPath.toString()); |
| final String randomId = DistCp.getRandomId(); |
| Path stagingArea; |
| try { |
| stagingArea = JobSubmissionFiles.getStagingDir(new Cluster(conf), |
| conf); |
| } catch (InterruptedException ie) { |
| throw new IOException(ie); |
| } |
| Path jobDirectory = new Path(stagingArea, |
| NAME + "_" + randomId); |
| FsPermission mapredSysPerms = |
| new FsPermission(JobSubmissionFiles.JOB_DIR_PERMISSION); |
| FileSystem.mkdirs(jobDirectory.getFileSystem(conf), jobDirectory, |
| mapredSysPerms); |
| conf.set(JOB_DIR_LABEL, jobDirectory.toString()); |
| //get a tmp directory for input splits |
| FileSystem jobfs = jobDirectory.getFileSystem(conf); |
| Path srcFiles = new Path(jobDirectory, "_har_src_files"); |
| conf.set(SRC_LIST_LABEL, srcFiles.toString()); |
| SequenceFile.Writer srcWriter = SequenceFile.createWriter(jobfs, conf, |
| srcFiles, LongWritable.class, Text.class, |
| SequenceFile.CompressionType.NONE); |
| // get the list of files |
| // create single list of files and dirs |
| try { |
| // write the top level dirs in first |
| writeTopLevelDirs(srcWriter, srcPaths, parentPath); |
| srcWriter.sync(); |
| // these are the input paths passed |
| // from the command line |
| // we do a recursive ls on these paths |
| // and then write them to the input file |
| // one at a time |
| for (Path src: srcPaths) { |
| ArrayList<FileStatus> allFiles = new ArrayList<FileStatus>(); |
| recursivels(fs, src, allFiles); |
| for (FileStatus stat: allFiles) { |
| String toWrite = ""; |
| long len = stat.isDir()? 0:stat.getLen(); |
| if (stat.isDir()) { |
| toWrite = "" + relPathToRoot(stat.getPath(), parentPath) + " dir "; |
| //get the children |
| FileStatus[] list = fs.listStatus(stat.getPath()); |
| StringBuffer sbuff = new StringBuffer(); |
| sbuff.append(toWrite); |
| for (FileStatus stats: list) { |
| sbuff.append(stats.getPath().getName() + " "); |
| } |
| toWrite = sbuff.toString(); |
| } |
| else { |
| toWrite += relPathToRoot(stat.getPath(), parentPath) + " file "; |
| } |
| srcWriter.append(new LongWritable(len), new |
| Text(toWrite)); |
| srcWriter.sync(); |
| numFiles++; |
| totalSize += len; |
| } |
| } |
| } finally { |
| srcWriter.close(); |
| } |
| //increase the replication of src files |
| jobfs.setReplication(srcFiles, (short) 10); |
| conf.setInt(SRC_COUNT_LABEL, numFiles); |
| conf.setLong(TOTAL_SIZE_LABEL, totalSize); |
| int numMaps = (int)(totalSize/partSize); |
| //run atleast one map. |
| conf.setNumMapTasks(numMaps == 0? 1:numMaps); |
| conf.setNumReduceTasks(1); |
| conf.setInputFormat(HArchiveInputFormat.class); |
| conf.setOutputFormat(NullOutputFormat.class); |
| conf.setMapperClass(HArchivesMapper.class); |
| conf.setReducerClass(HArchivesReducer.class); |
| conf.setMapOutputKeyClass(IntWritable.class); |
| conf.setMapOutputValueClass(Text.class); |
| conf.set(JobContext.HISTORY_LOCATION, "none"); |
| FileInputFormat.addInputPath(conf, jobDirectory); |
| //make sure no speculative execution is done |
| conf.setSpeculativeExecution(false); |
| JobClient.runJob(conf); |
| //delete the tmp job directory |
| try { |
| jobfs.delete(jobDirectory, true); |
| } catch(IOException ie) { |
| LOG.info("Unable to clean tmp directory " + jobDirectory); |
| } |
| } |
| |
| static class HArchivesMapper |
| implements Mapper<LongWritable, Text, IntWritable, Text> { |
| private JobConf conf = null; |
| int partId = -1 ; |
| Path tmpOutputDir = null; |
| Path tmpOutput = null; |
| String partname = null; |
| Path rootPath = null; |
| FSDataOutputStream partStream = null; |
| FileSystem destFs = null; |
| byte[] buffer; |
| int buf_size = 128 * 1024; |
| |
| // configure the mapper and create |
| // the part file. |
| // use map reduce framework to write into |
| // tmp files. |
| public void configure(JobConf conf) { |
| this.conf = conf; |
| // this is tightly tied to map reduce |
| // since it does not expose an api |
| // to get the partition |
| partId = conf.getInt(JobContext.TASK_PARTITION, -1); |
| // create a file name using the partition |
| // we need to write to this directory |
| tmpOutputDir = FileOutputFormat.getWorkOutputPath(conf); |
| // get the output path and write to the tmp |
| // directory |
| partname = "part-" + partId; |
| tmpOutput = new Path(tmpOutputDir, partname); |
| rootPath = (conf.get(SRC_PARENT_LABEL, null) == null) ? null : |
| new Path(conf.get(SRC_PARENT_LABEL)); |
| if (rootPath == null) { |
| throw new RuntimeException("Unable to read parent " + |
| "path for har from config"); |
| } |
| try { |
| destFs = tmpOutput.getFileSystem(conf); |
| //this was a stale copy |
| if (destFs.exists(tmpOutput)) { |
| destFs.delete(tmpOutput, false); |
| } |
| partStream = destFs.create(tmpOutput); |
| } catch(IOException ie) { |
| throw new RuntimeException("Unable to open output file " + tmpOutput); |
| } |
| buffer = new byte[buf_size]; |
| } |
| |
| // copy raw data. |
| public void copyData(Path input, FSDataInputStream fsin, |
| FSDataOutputStream fout, Reporter reporter) throws IOException { |
| try { |
| for (int cbread=0; (cbread = fsin.read(buffer))>= 0;) { |
| fout.write(buffer, 0,cbread); |
| reporter.progress(); |
| } |
| } finally { |
| fsin.close(); |
| } |
| } |
| |
| static class MapStat { |
| private String pathname; |
| private boolean isDir; |
| private List<String> children; |
| public MapStat(String line) { |
| String[] splits = line.split(" "); |
| pathname = splits[0]; |
| if ("dir".equals(splits[1])) { |
| isDir = true; |
| } |
| else { |
| isDir = false; |
| } |
| if (isDir) { |
| children = new ArrayList<String>(); |
| for (int i = 2; i < splits.length; i++) { |
| children.add(splits[i]); |
| } |
| } |
| } |
| } |
| |
| /** |
| * get rid of / in the beginning of path |
| * @param p the path |
| * @return return path without / |
| */ |
| private Path realPath(Path p, Path parent) { |
| Path rootPath = new Path(Path.SEPARATOR); |
| if (rootPath.compareTo(p) == 0) { |
| return parent; |
| } |
| return new Path(parent, new Path(p.toString().substring(1))); |
| } |
| |
| // read files from the split input |
| // and write it onto the part files. |
| // also output hash(name) and string |
| // for reducer to create index |
| // and masterindex files. |
| public void map(LongWritable key, Text value, |
| OutputCollector<IntWritable, Text> out, |
| Reporter reporter) throws IOException { |
| String line = value.toString(); |
| MapStat mstat = new MapStat(line); |
| Path relPath = new Path(mstat.pathname); |
| int hash = HarFileSystem.getHarHash(relPath); |
| String towrite = null; |
| Path srcPath = realPath(relPath, rootPath); |
| long startPos = partStream.getPos(); |
| if (mstat.isDir) { |
| towrite = relPath.toString() + " " + "dir none " + 0 + " " + 0 + " "; |
| StringBuffer sbuff = new StringBuffer(); |
| sbuff.append(towrite); |
| for (String child: mstat.children) { |
| sbuff.append(child + " "); |
| } |
| towrite = sbuff.toString(); |
| //reading directories is also progress |
| reporter.progress(); |
| } |
| else { |
| FileSystem srcFs = srcPath.getFileSystem(conf); |
| FileStatus srcStatus = srcFs.getFileStatus(srcPath); |
| FSDataInputStream input = srcFs.open(srcStatus.getPath()); |
| reporter.setStatus("Copying file " + srcStatus.getPath() + |
| " to archive."); |
| copyData(srcStatus.getPath(), input, partStream, reporter); |
| towrite = relPath.toString() + " file " + partname + " " + startPos |
| + " " + srcStatus.getLen() + " "; |
| } |
| out.collect(new IntWritable(hash), new Text(towrite)); |
| } |
| |
| public void close() throws IOException { |
| // close the part files. |
| partStream.close(); |
| } |
| } |
| |
| /** the reduce for creating the index and the master index |
| * |
| */ |
| static class HArchivesReducer implements Reducer<IntWritable, |
| Text, Text, Text> { |
| private JobConf conf = null; |
| private long startIndex = 0; |
| private long endIndex = 0; |
| private long startPos = 0; |
| private Path masterIndex = null; |
| private Path index = null; |
| private FileSystem fs = null; |
| private FSDataOutputStream outStream = null; |
| private FSDataOutputStream indexStream = null; |
| private int numIndexes = 1000; |
| private Path tmpOutputDir = null; |
| private int written = 0; |
| private int keyVal = 0; |
| |
| // configure |
| public void configure(JobConf conf) { |
| this.conf = conf; |
| tmpOutputDir = FileOutputFormat.getWorkOutputPath(this.conf); |
| masterIndex = new Path(tmpOutputDir, "_masterindex"); |
| index = new Path(tmpOutputDir, "_index"); |
| try { |
| fs = masterIndex.getFileSystem(conf); |
| if (fs.exists(masterIndex)) { |
| fs.delete(masterIndex, false); |
| } |
| if (fs.exists(index)) { |
| fs.delete(index, false); |
| } |
| indexStream = fs.create(index); |
| outStream = fs.create(masterIndex); |
| String version = HarFileSystem.VERSION + " \n"; |
| outStream.write(version.getBytes()); |
| |
| } catch(IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| // create the index and master index. The input to |
| // the reduce is already sorted by the hash of the |
| // files. SO we just need to write it to the index. |
| // We update the masterindex as soon as we update |
| // numIndex entries. |
| public void reduce(IntWritable key, Iterator<Text> values, |
| OutputCollector<Text, Text> out, |
| Reporter reporter) throws IOException { |
| keyVal = key.get(); |
| while(values.hasNext()) { |
| Text value = values.next(); |
| String towrite = value.toString() + "\n"; |
| indexStream.write(towrite.getBytes()); |
| written++; |
| if (written > numIndexes -1) { |
| // every 1000 indexes we report status |
| reporter.setStatus("Creating index for archives"); |
| reporter.progress(); |
| endIndex = keyVal; |
| String masterWrite = startIndex + " " + endIndex + " " + startPos |
| + " " + indexStream.getPos() + " \n" ; |
| outStream.write(masterWrite.getBytes()); |
| startPos = indexStream.getPos(); |
| startIndex = endIndex; |
| written = 0; |
| } |
| } |
| } |
| |
| public void close() throws IOException { |
| //write the last part of the master index. |
| if (written > 0) { |
| String masterWrite = startIndex + " " + keyVal + " " + startPos + |
| " " + indexStream.getPos() + " \n"; |
| outStream.write(masterWrite.getBytes()); |
| } |
| // close the streams |
| outStream.close(); |
| indexStream.close(); |
| // try increasing the replication |
| fs.setReplication(index, (short) 5); |
| fs.setReplication(masterIndex, (short) 5); |
| } |
| |
| } |
| |
| /** the main driver for creating the archives |
| * it takes at least three command line parameters. The parent path, |
| * The src and the dest. It does an lsr on the source paths. |
| * The mapper created archuves and the reducer creates |
| * the archive index. |
| */ |
| |
| public int run(String[] args) throws Exception { |
| try { |
| Path parentPath = null; |
| List<Path> srcPaths = new ArrayList<Path>(); |
| Path destPath = null; |
| String archiveName = null; |
| if (args.length < 5) { |
| System.out.println(usage); |
| throw new IOException("Invalid usage."); |
| } |
| if (!"-archiveName".equals(args[0])) { |
| System.out.println(usage); |
| throw new IOException("Archive Name not specified."); |
| } |
| archiveName = args[1]; |
| if (!checkValidName(archiveName)) { |
| System.out.println(usage); |
| throw new IOException("Invalid name for archives. " + archiveName); |
| } |
| int i = 2; |
| //check to see if relative parent has been provided or not |
| //this is a required parameter. |
| if (! "-p".equals(args[i])) { |
| System.out.println(usage); |
| throw new IOException("Parent path not specified."); |
| } |
| parentPath = new Path(args[i+1]); |
| i+=2; |
| //read the rest of the paths |
| for (; i < args.length; i++) { |
| if (i == (args.length - 1)) { |
| destPath = new Path(args[i]); |
| } |
| else { |
| Path argPath = new Path(args[i]); |
| if (argPath.isAbsolute()) { |
| System.out.println(usage); |
| throw new IOException("source path " + argPath + |
| " is not relative to "+ parentPath); |
| } |
| srcPaths.add(new Path(parentPath, argPath)); |
| } |
| } |
| if (srcPaths.size() == 0) { |
| // assuming if the user does not specify path for sources |
| // the whole parent directory needs to be archived. |
| srcPaths.add(parentPath); |
| } |
| // do a glob on the srcPaths and then pass it on |
| List<Path> globPaths = new ArrayList<Path>(); |
| for (Path p: srcPaths) { |
| FileSystem fs = p.getFileSystem(getConf()); |
| FileStatus[] statuses = fs.globStatus(p); |
| for (FileStatus status: statuses) { |
| globPaths.add(fs.makeQualified(status.getPath())); |
| } |
| } |
| archive(parentPath, globPaths, archiveName, destPath); |
| } catch(IOException ie) { |
| System.err.println(ie.getLocalizedMessage()); |
| return -1; |
| } |
| return 0; |
| } |
| |
| /** the main functions **/ |
| public static void main(String[] args) { |
| JobConf job = new JobConf(HadoopArchives.class); |
| HadoopArchives harchives = new HadoopArchives(job); |
| int ret = 0; |
| |
| try{ |
| ret = ToolRunner.run(harchives, args); |
| } catch(Exception e) { |
| LOG.debug("Exception in archives ", e); |
| System.err.println("Exception in archives"); |
| System.err.println(e.getLocalizedMessage()); |
| System.exit(1); |
| } |
| System.exit(ret); |
| } |
| } |
