Examples with CompressionType org.apache.hadoop.io.SequenceFile.CompressionType used on opensource projects

Example 6 with CompressionType

use of org.apache.hadoop.io.SequenceFile.CompressionType in project hadoop by apache.

the class MapFileOutputFormat method getRecordWriter.

public RecordWriter<WritableComparable, Writable> getRecordWriter(FileSystem ignored, JobConf job, String name, Progressable progress) throws IOException {
    // get the path of the temporary output file 
    Path file = FileOutputFormat.getTaskOutputPath(job, name);
    FileSystem fs = file.getFileSystem(job);
    CompressionCodec codec = null;
    CompressionType compressionType = CompressionType.NONE;
    if (getCompressOutput(job)) {
        // find the kind of compression to do
        compressionType = SequenceFileOutputFormat.getOutputCompressionType(job);
        // find the right codec
        Class<? extends CompressionCodec> codecClass = getOutputCompressorClass(job, DefaultCodec.class);
        codec = ReflectionUtils.newInstance(codecClass, job);
    }
    // ignore the progress parameter, since MapFile is local
    final MapFile.Writer out = new MapFile.Writer(job, fs, file.toString(), job.getOutputKeyClass().asSubclass(WritableComparable.class), job.getOutputValueClass().asSubclass(Writable.class), compressionType, codec, progress);
    return new RecordWriter<WritableComparable, Writable>() {

        public void write(WritableComparable key, Writable value) throws IOException {
            out.append(key, value);
        }

        public void close(Reporter reporter) throws IOException {
            out.close();
        }
    };
}

Example 7 with CompressionType

use of org.apache.hadoop.io.SequenceFile.CompressionType in project hadoop by apache.

the class TestSequenceFile method main.

/** For debugging and testing. */
public static void main(String[] args) throws Exception {
    int count = 1024 * 1024;
    int megabytes = 1;
    int factor = 10;
    boolean create = true;
    boolean rwonly = false;
    boolean check = false;
    boolean fast = false;
    boolean merge = false;
    String compressType = "NONE";
    String compressionCodec = "org.apache.hadoop.io.compress.DefaultCodec";
    Path file = null;
    int seed = new Random().nextInt();
    String usage = "Usage: testsequencefile " + "[-count N] " + "[-seed #] [-check] [-compressType <NONE|RECORD|BLOCK>] " + "-codec <compressionCodec> " + "[[-rwonly] | {[-megabytes M] [-factor F] [-nocreate] [-fast] [-merge]}] " + " file";
    if (args.length == 0) {
        System.err.println(usage);
        System.exit(-1);
    }
    FileSystem fs = null;
    try {
        for (int i = 0; i < args.length; ++i) {
            // parse command line
            if (args[i] == null) {
                continue;
            } else if (args[i].equals("-count")) {
                count = Integer.parseInt(args[++i]);
            } else if (args[i].equals("-megabytes")) {
                megabytes = Integer.parseInt(args[++i]);
            } else if (args[i].equals("-factor")) {
                factor = Integer.parseInt(args[++i]);
            } else if (args[i].equals("-seed")) {
                seed = Integer.parseInt(args[++i]);
            } else if (args[i].equals("-rwonly")) {
                rwonly = true;
            } else if (args[i].equals("-nocreate")) {
                create = false;
            } else if (args[i].equals("-check")) {
                check = true;
            } else if (args[i].equals("-fast")) {
                fast = true;
            } else if (args[i].equals("-merge")) {
                merge = true;
            } else if (args[i].equals("-compressType")) {
                compressType = args[++i];
            } else if (args[i].equals("-codec")) {
                compressionCodec = args[++i];
            } else {
                // file is required parameter
                file = new Path(args[i]);
            }
        }
        TestSequenceFile test = new TestSequenceFile();
        fs = file.getFileSystem(test.conf);
        LOG.info("count = " + count);
        LOG.info("megabytes = " + megabytes);
        LOG.info("factor = " + factor);
        LOG.info("create = " + create);
        LOG.info("seed = " + seed);
        LOG.info("rwonly = " + rwonly);
        LOG.info("check = " + check);
        LOG.info("fast = " + fast);
        LOG.info("merge = " + merge);
        LOG.info("compressType = " + compressType);
        LOG.info("compressionCodec = " + compressionCodec);
        LOG.info("file = " + file);
        if (rwonly && (!create || merge || fast)) {
            System.err.println(usage);
            System.exit(-1);
        }
        CompressionType compressionType = CompressionType.valueOf(compressType);
        CompressionCodec codec = (CompressionCodec) ReflectionUtils.newInstance(test.conf.getClassByName(compressionCodec), test.conf);
        if (rwonly || (create && !merge)) {
            test.writeTest(fs, count, seed, file, compressionType, codec);
            test.readTest(fs, count, seed, file);
        }
        if (!rwonly) {
            if (merge) {
                test.mergeTest(fs, count, seed, file, compressionType, fast, factor, megabytes);
            } else {
                test.sortTest(fs, count, megabytes, factor, fast, file);
            }
        }
        if (check) {
            test.checkSort(fs, count, seed, file);
        }
    } finally {
        if (fs != null) {
            fs.close();
        }
    }
}

Example 8 with CompressionType

use of org.apache.hadoop.io.SequenceFile.CompressionType in project hadoop by apache.

the class SequenceFileOutputFormat method getSequenceWriter.

protected SequenceFile.Writer getSequenceWriter(TaskAttemptContext context, Class<?> keyClass, Class<?> valueClass) throws IOException {
    Configuration conf = context.getConfiguration();
    CompressionCodec codec = null;
    CompressionType compressionType = CompressionType.NONE;
    if (getCompressOutput(context)) {
        // find the kind of compression to do
        compressionType = getOutputCompressionType(context);
        // find the right codec
        Class<?> codecClass = getOutputCompressorClass(context, DefaultCodec.class);
        codec = (CompressionCodec) ReflectionUtils.newInstance(codecClass, conf);
    }
    // get the path of the temporary output file 
    Path file = getDefaultWorkFile(context, "");
    FileSystem fs = file.getFileSystem(conf);
    return SequenceFile.createWriter(fs, conf, file, keyClass, valueClass, compressionType, codec, context);
}

Example 9 with CompressionType

use of org.apache.hadoop.io.SequenceFile.CompressionType in project nutch by apache.

the class FetcherOutputFormat method getRecordWriter.

@Override
public RecordWriter<Text, NutchWritable> getRecordWriter(TaskAttemptContext context) throws IOException {
    Configuration conf = context.getConfiguration();
    String name = getUniqueFile(context, "part", "");
    Path dir = FileOutputFormat.getOutputPath(context);
    FileSystem fs = dir.getFileSystem(context.getConfiguration());
    Path out = FileOutputFormat.getOutputPath(context);
    final Path fetch = new Path(new Path(out, CrawlDatum.FETCH_DIR_NAME), name);
    final Path content = new Path(new Path(out, Content.DIR_NAME), name);
    final CompressionType compType = SequenceFileOutputFormat.getOutputCompressionType(context);
    Option fKeyClassOpt = MapFile.Writer.keyClass(Text.class);
    org.apache.hadoop.io.SequenceFile.Writer.Option fValClassOpt = SequenceFile.Writer.valueClass(CrawlDatum.class);
    org.apache.hadoop.io.SequenceFile.Writer.Option fProgressOpt = SequenceFile.Writer.progressable((Progressable) context);
    org.apache.hadoop.io.SequenceFile.Writer.Option fCompOpt = SequenceFile.Writer.compression(compType);
    final MapFile.Writer fetchOut = new MapFile.Writer(conf, fetch, fKeyClassOpt, fValClassOpt, fCompOpt, fProgressOpt);
    return new RecordWriter<Text, NutchWritable>() {

        private MapFile.Writer contentOut;

        private RecordWriter<Text, Parse> parseOut;

        {
            if (Fetcher.isStoringContent(conf)) {
                Option cKeyClassOpt = MapFile.Writer.keyClass(Text.class);
                org.apache.hadoop.io.SequenceFile.Writer.Option cValClassOpt = SequenceFile.Writer.valueClass(Content.class);
                org.apache.hadoop.io.SequenceFile.Writer.Option cProgressOpt = SequenceFile.Writer.progressable((Progressable) context);
                org.apache.hadoop.io.SequenceFile.Writer.Option cCompOpt = SequenceFile.Writer.compression(compType);
                contentOut = new MapFile.Writer(conf, content, cKeyClassOpt, cValClassOpt, cCompOpt, cProgressOpt);
            }
            if (Fetcher.isParsing(conf)) {
                parseOut = new ParseOutputFormat().getRecordWriter(context);
            }
        }

        public void write(Text key, NutchWritable value) throws IOException, InterruptedException {
            Writable w = value.get();
            if (w instanceof CrawlDatum)
                fetchOut.append(key, w);
            else if (w instanceof Content && contentOut != null)
                contentOut.append(key, w);
            else if (w instanceof Parse && parseOut != null)
                parseOut.write(key, (Parse) w);
        }

        public void close(TaskAttemptContext context) throws IOException, InterruptedException {
            fetchOut.close();
            if (contentOut != null) {
                contentOut.close();
            }
            if (parseOut != null) {
                parseOut.close(context);
            }
        }
    };
}

Example 10 with CompressionType

use of org.apache.hadoop.io.SequenceFile.CompressionType in project nutch by apache.

the class ParseOutputFormat method getRecordWriter.

public RecordWriter<Text, Parse> getRecordWriter(TaskAttemptContext context) throws IOException {
    Configuration conf = context.getConfiguration();
    String name = getUniqueFile(context, "part");
    Path dir = FileOutputFormat.getOutputPath(context);
    FileSystem fs = dir.getFileSystem(context.getConfiguration());
    if (conf.getBoolean("parse.filter.urls", true)) {
        filters = new URLFilters(conf);
        exemptionFilters = new URLExemptionFilters(conf);
    }
    if (conf.getBoolean("parse.normalize.urls", true)) {
        normalizers = new URLNormalizers(conf, URLNormalizers.SCOPE_OUTLINK);
    }
    this.scfilters = new ScoringFilters(conf);
    final int interval = conf.getInt("db.fetch.interval.default", 2592000);
    final boolean ignoreInternalLinks = conf.getBoolean("db.ignore.internal.links", false);
    final boolean ignoreExternalLinks = conf.getBoolean("db.ignore.external.links", false);
    final String ignoreExternalLinksMode = conf.get("db.ignore.external.links.mode", "byHost");
    // NUTCH-2435 - parameter "parser.store.text" allowing to choose whether to
    // store 'parse_text' directory or not:
    final boolean storeText = conf.getBoolean("parser.store.text", true);
    int maxOutlinksPerPage = conf.getInt("db.max.outlinks.per.page", 100);
    final boolean isParsing = conf.getBoolean("fetcher.parse", true);
    final int maxOutlinks = (maxOutlinksPerPage < 0) ? Integer.MAX_VALUE : maxOutlinksPerPage;
    final CompressionType compType = SequenceFileOutputFormat.getOutputCompressionType(context);
    Path out = FileOutputFormat.getOutputPath(context);
    Path text = new Path(new Path(out, ParseText.DIR_NAME), name);
    Path data = new Path(new Path(out, ParseData.DIR_NAME), name);
    Path crawl = new Path(new Path(out, CrawlDatum.PARSE_DIR_NAME), name);
    final String[] parseMDtoCrawlDB = conf.get("db.parsemeta.to.crawldb", "").split(" *, *");
    // textOut Options
    final MapFile.Writer textOut;
    if (storeText) {
        Option tKeyClassOpt = (Option) MapFile.Writer.keyClass(Text.class);
        org.apache.hadoop.io.SequenceFile.Writer.Option tValClassOpt = SequenceFile.Writer.valueClass(ParseText.class);
        org.apache.hadoop.io.SequenceFile.Writer.Option tProgressOpt = SequenceFile.Writer.progressable((Progressable) context);
        org.apache.hadoop.io.SequenceFile.Writer.Option tCompOpt = SequenceFile.Writer.compression(CompressionType.RECORD);
        textOut = new MapFile.Writer(conf, text, tKeyClassOpt, tValClassOpt, tCompOpt, tProgressOpt);
    } else {
        textOut = null;
    }
    // dataOut Options
    Option dKeyClassOpt = (Option) MapFile.Writer.keyClass(Text.class);
    org.apache.hadoop.io.SequenceFile.Writer.Option dValClassOpt = SequenceFile.Writer.valueClass(ParseData.class);
    org.apache.hadoop.io.SequenceFile.Writer.Option dProgressOpt = SequenceFile.Writer.progressable((Progressable) context);
    org.apache.hadoop.io.SequenceFile.Writer.Option dCompOpt = SequenceFile.Writer.compression(compType);
    final MapFile.Writer dataOut = new MapFile.Writer(conf, data, dKeyClassOpt, dValClassOpt, dCompOpt, dProgressOpt);
    final SequenceFile.Writer crawlOut = SequenceFile.createWriter(conf, SequenceFile.Writer.file(crawl), SequenceFile.Writer.keyClass(Text.class), SequenceFile.Writer.valueClass(CrawlDatum.class), SequenceFile.Writer.bufferSize(fs.getConf().getInt("io.file.buffer.size", 4096)), SequenceFile.Writer.replication(fs.getDefaultReplication(crawl)), SequenceFile.Writer.blockSize(1073741824), SequenceFile.Writer.compression(compType, new DefaultCodec()), SequenceFile.Writer.progressable((Progressable) context), SequenceFile.Writer.metadata(new Metadata()));
    return new RecordWriter<Text, Parse>() {

        public void write(Text key, Parse parse) throws IOException {
            String fromUrl = key.toString();
            // host or domain name of the source URL
            String origin = null;
            if (textOut != null) {
                textOut.append(key, new ParseText(parse.getText()));
            }
            ParseData parseData = parse.getData();
            // recover the signature prepared by Fetcher or ParseSegment
            String sig = parseData.getContentMeta().get(Nutch.SIGNATURE_KEY);
            if (sig != null) {
                byte[] signature = StringUtil.fromHexString(sig);
                if (signature != null) {
                    // append a CrawlDatum with a signature
                    CrawlDatum d = new CrawlDatum(CrawlDatum.STATUS_SIGNATURE, 0);
                    d.setSignature(signature);
                    crawlOut.append(key, d);
                }
            }
            // see if the parse metadata contain things that we'd like
            // to pass to the metadata of the crawlDB entry
            CrawlDatum parseMDCrawlDatum = null;
            for (String mdname : parseMDtoCrawlDB) {
                String mdvalue = parse.getData().getParseMeta().get(mdname);
                if (mdvalue != null) {
                    if (parseMDCrawlDatum == null)
                        parseMDCrawlDatum = new CrawlDatum(CrawlDatum.STATUS_PARSE_META, 0);
                    parseMDCrawlDatum.getMetaData().put(new Text(mdname), new Text(mdvalue));
                }
            }
            if (parseMDCrawlDatum != null)
                crawlOut.append(key, parseMDCrawlDatum);
            // need to determine origin (once for all outlinks)
            if (ignoreExternalLinks || ignoreInternalLinks) {
                URL originURL = new URL(fromUrl.toString());
                // based on domain?
                if ("bydomain".equalsIgnoreCase(ignoreExternalLinksMode)) {
                    origin = URLUtil.getDomainName(originURL).toLowerCase();
                } else // use host
                {
                    origin = originURL.getHost().toLowerCase();
                }
            }
            ParseStatus pstatus = parseData.getStatus();
            if (pstatus != null && pstatus.isSuccess() && pstatus.getMinorCode() == ParseStatus.SUCCESS_REDIRECT) {
                String newUrl = pstatus.getMessage();
                int refreshTime = Integer.valueOf(pstatus.getArgs()[1]);
                newUrl = filterNormalize(fromUrl, newUrl, origin, ignoreInternalLinks, ignoreExternalLinks, ignoreExternalLinksMode, filters, exemptionFilters, normalizers, URLNormalizers.SCOPE_FETCHER);
                if (newUrl != null) {
                    String reprUrl = URLUtil.chooseRepr(fromUrl, newUrl, refreshTime < Fetcher.PERM_REFRESH_TIME);
                    CrawlDatum newDatum = new CrawlDatum();
                    newDatum.setStatus(CrawlDatum.STATUS_LINKED);
                    if (reprUrl != null && !reprUrl.equals(newUrl)) {
                        newDatum.getMetaData().put(Nutch.WRITABLE_REPR_URL_KEY, new Text(reprUrl));
                    }
                    crawlOut.append(new Text(newUrl), newDatum);
                }
            }
            // collect outlinks for subsequent db update
            Outlink[] links = parseData.getOutlinks();
            int outlinksToStore = Math.min(maxOutlinks, links.length);
            int validCount = 0;
            CrawlDatum adjust = null;
            List<Entry<Text, CrawlDatum>> targets = new ArrayList<>(outlinksToStore);
            List<Outlink> outlinkList = new ArrayList<>(outlinksToStore);
            for (int i = 0; i < links.length && validCount < outlinksToStore; i++) {
                String toUrl = links[i].getToUrl();
                // only normalize and filter if fetcher.parse = false
                if (!isParsing) {
                    toUrl = ParseOutputFormat.filterNormalize(fromUrl, toUrl, origin, ignoreInternalLinks, ignoreExternalLinks, ignoreExternalLinksMode, filters, exemptionFilters, normalizers);
                    if (toUrl == null) {
                        continue;
                    }
                }
                CrawlDatum target = new CrawlDatum(CrawlDatum.STATUS_LINKED, interval);
                Text targetUrl = new Text(toUrl);
                // see if the outlink has any metadata attached
                // and if so pass that to the crawldatum so that
                // the initial score or distribution can use that
                MapWritable outlinkMD = links[i].getMetadata();
                if (outlinkMD != null) {
                    target.getMetaData().putAll(outlinkMD);
                }
                try {
                    scfilters.initialScore(targetUrl, target);
                } catch (ScoringFilterException e) {
                    LOG.warn("Cannot filter init score for url " + key + ", using default: " + e.getMessage());
                    target.setScore(0.0f);
                }
                targets.add(new SimpleEntry(targetUrl, target));
                // overwrite URL in Outlink object with normalized URL (NUTCH-1174)
                links[i].setUrl(toUrl);
                outlinkList.add(links[i]);
                validCount++;
            }
            try {
                // compute score contributions and adjustment to the original score
                adjust = scfilters.distributeScoreToOutlinks(key, parseData, targets, null, links.length);
            } catch (ScoringFilterException e) {
                LOG.warn("Cannot distribute score from " + key + ": " + e.getMessage());
            }
            for (Entry<Text, CrawlDatum> target : targets) {
                crawlOut.append(target.getKey(), target.getValue());
            }
            if (adjust != null)
                crawlOut.append(key, adjust);
            Outlink[] filteredLinks = outlinkList.toArray(new Outlink[outlinkList.size()]);
            parseData = new ParseData(parseData.getStatus(), parseData.getTitle(), filteredLinks, parseData.getContentMeta(), parseData.getParseMeta());
            dataOut.append(key, parseData);
            if (!parse.isCanonical()) {
                CrawlDatum datum = new CrawlDatum();
                datum.setStatus(CrawlDatum.STATUS_FETCH_SUCCESS);
                String timeString = parse.getData().getContentMeta().get(Nutch.FETCH_TIME_KEY);
                try {
                    datum.setFetchTime(Long.parseLong(timeString));
                } catch (Exception e) {
                    LOG.warn("Can't read fetch time for: " + key);
                    datum.setFetchTime(System.currentTimeMillis());
                }
                crawlOut.append(key, datum);
            }
        }

        public void close(TaskAttemptContext context) throws IOException {
            if (textOut != null)
                textOut.close();
            dataOut.close();
            crawlOut.close();
        }
    };
}