| /** |
| * |
| * 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.hbase.mapreduce; |
| |
| import java.io.IOException; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.hbase.HConstants; |
| import org.apache.hadoop.hbase.classification.InterfaceAudience; |
| import org.apache.hadoop.hbase.classification.InterfaceStability; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.conf.Configured; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.hbase.Cell; |
| import org.apache.hadoop.hbase.CellUtil; |
| import org.apache.hadoop.hbase.HBaseConfiguration; |
| import org.apache.hadoop.hbase.client.Result; |
| import org.apache.hadoop.hbase.client.Scan; |
| import org.apache.hadoop.hbase.filter.CompareFilter; |
| import org.apache.hadoop.hbase.filter.Filter; |
| import org.apache.hadoop.hbase.filter.PrefixFilter; |
| import org.apache.hadoop.hbase.filter.RegexStringComparator; |
| import org.apache.hadoop.hbase.filter.RowFilter; |
| import org.apache.hadoop.hbase.io.ImmutableBytesWritable; |
| import org.apache.hadoop.hbase.util.Bytes; |
| import org.apache.hadoop.io.IntWritable; |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.mapreduce.Job; |
| import org.apache.hadoop.mapreduce.Reducer; |
| import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat; |
| import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat; |
| import org.apache.hadoop.util.Tool; |
| import org.apache.hadoop.util.ToolRunner; |
| |
| import com.google.common.base.Preconditions; |
| |
| |
| /** |
| * A job with a a map and reduce phase to count cells in a table. |
| * The counter lists the following stats for a given table: |
| * <pre> |
| * 1. Total number of rows in the table |
| * 2. Total number of CFs across all rows |
| * 3. Total qualifiers across all rows |
| * 4. Total occurrence of each CF |
| * 5. Total occurrence of each qualifier |
| * 6. Total number of versions of each qualifier. |
| * </pre> |
| * |
| * The cellcounter can take optional parameters to use a user |
| * supplied row/family/qualifier string to use in the report and |
| * second a regex based or prefix based row filter to restrict the |
| * count operation to a limited subset of rows from the table or a |
| * start time and/or end time to limit the count to a time range. |
| */ |
| @InterfaceAudience.Public |
| @InterfaceStability.Stable |
| public class CellCounter extends Configured implements Tool { |
| private static final Log LOG = |
| LogFactory.getLog(CellCounter.class.getName()); |
| |
| |
| /** |
| * Name of this 'program'. |
| */ |
| static final String NAME = "CellCounter"; |
| |
| private final static String JOB_NAME_CONF_KEY = "mapreduce.job.name"; |
| |
| /** |
| * Mapper that runs the count. |
| */ |
| static class CellCounterMapper |
| extends TableMapper<Text, IntWritable> { |
| /** |
| * Counter enumeration to count the actual rows. |
| */ |
| public static enum Counters { |
| ROWS, |
| CELLS |
| } |
| |
| private Configuration conf; |
| private String separator; |
| |
| // state of current row, family, column needs to persist across map() invocations |
| // in order to properly handle scanner batching, where a single qualifier may have too |
| // many versions for a single map() call |
| private byte[] lastRow; |
| private String currentRowKey; |
| byte[] currentFamily = null; |
| String currentFamilyName = null; |
| byte[] currentQualifier = null; |
| // family + qualifier |
| String currentQualifierName = null; |
| // rowkey + family + qualifier |
| String currentRowQualifierName = null; |
| |
| @Override |
| protected void setup(Context context) throws IOException, InterruptedException { |
| conf = context.getConfiguration(); |
| separator = conf.get("ReportSeparator",":"); |
| } |
| |
| /** |
| * Maps the data. |
| * |
| * @param row The current table row key. |
| * @param values The columns. |
| * @param context The current context. |
| * @throws IOException When something is broken with the data. |
| * @see org.apache.hadoop.mapreduce.Mapper#map(KEYIN, VALUEIN, |
| * org.apache.hadoop.mapreduce.Mapper.Context) |
| */ |
| |
| @Override |
| public void map(ImmutableBytesWritable row, Result values, |
| Context context) |
| throws IOException { |
| Preconditions.checkState(values != null, |
| "values passed to the map is null"); |
| |
| try { |
| byte[] currentRow = values.getRow(); |
| if (lastRow == null || !Bytes.equals(lastRow, currentRow)) { |
| lastRow = currentRow; |
| currentRowKey = Bytes.toStringBinary(currentRow); |
| currentFamily = null; |
| currentQualifier = null; |
| context.getCounter(Counters.ROWS).increment(1); |
| context.write(new Text("Total ROWS"), new IntWritable(1)); |
| } |
| if (!values.isEmpty()) { |
| int cellCount = 0; |
| for (Cell value : values.listCells()) { |
| cellCount++; |
| if (currentFamily == null || !CellUtil.matchingFamily(value, currentFamily)) { |
| currentFamily = CellUtil.cloneFamily(value); |
| currentFamilyName = Bytes.toStringBinary(currentFamily); |
| currentQualifier = null; |
| context.getCounter("CF", currentFamilyName).increment(1); |
| if (1 == context.getCounter("CF", currentFamilyName).getValue()) { |
| context.write(new Text("Total Families Across all Rows"), new IntWritable(1)); |
| context.write(new Text(currentFamily), new IntWritable(1)); |
| } |
| } |
| if (currentQualifier == null || !CellUtil.matchingQualifier(value, currentQualifier)) { |
| currentQualifier = CellUtil.cloneQualifier(value); |
| currentQualifierName = currentFamilyName + separator + |
| Bytes.toStringBinary(currentQualifier); |
| currentRowQualifierName = currentRowKey + separator + currentQualifierName; |
| |
| context.write(new Text("Total Qualifiers across all Rows"), |
| new IntWritable(1)); |
| context.write(new Text(currentQualifierName), new IntWritable(1)); |
| } |
| // Increment versions |
| context.write(new Text(currentRowQualifierName + "_Versions"), new IntWritable(1)); |
| } |
| context.getCounter(Counters.CELLS).increment(cellCount); |
| } |
| } catch (InterruptedException e) { |
| e.printStackTrace(); |
| } |
| } |
| } |
| |
| static class IntSumReducer<Key> extends Reducer<Key, IntWritable, |
| Key, IntWritable> { |
| |
| private IntWritable result = new IntWritable(); |
| public void reduce(Key key, Iterable<IntWritable> values, |
| Context context) |
| throws IOException, InterruptedException { |
| int sum = 0; |
| for (IntWritable val : values) { |
| sum += val.get(); |
| } |
| result.set(sum); |
| context.write(key, result); |
| } |
| } |
| |
| /** |
| * Sets up the actual job. |
| * |
| * @param conf The current configuration. |
| * @param args The command line parameters. |
| * @return The newly created job. |
| * @throws IOException When setting up the job fails. |
| */ |
| public static Job createSubmittableJob(Configuration conf, String[] args) |
| throws IOException { |
| String tableName = args[0]; |
| Path outputDir = new Path(args[1]); |
| String reportSeparatorString = (args.length > 2) ? args[2]: ":"; |
| conf.set("ReportSeparator", reportSeparatorString); |
| Job job = Job.getInstance(conf, conf.get(JOB_NAME_CONF_KEY, NAME + "_" + tableName)); |
| job.setJarByClass(CellCounter.class); |
| Scan scan = getConfiguredScanForJob(conf, args); |
| TableMapReduceUtil.initTableMapperJob(tableName, scan, |
| CellCounterMapper.class, ImmutableBytesWritable.class, Result.class, job); |
| job.setNumReduceTasks(1); |
| job.setMapOutputKeyClass(Text.class); |
| job.setMapOutputValueClass(IntWritable.class); |
| job.setOutputFormatClass(TextOutputFormat.class); |
| job.setOutputKeyClass(Text.class); |
| job.setOutputValueClass(IntWritable.class); |
| FileOutputFormat.setOutputPath(job, outputDir); |
| job.setReducerClass(IntSumReducer.class); |
| return job; |
| } |
| |
| private static Scan getConfiguredScanForJob(Configuration conf, String[] args) |
| throws IOException { |
| // create scan with any properties set from TableInputFormat |
| Scan s = TableInputFormat.createScanFromConfiguration(conf); |
| // Set Scan Versions |
| if (conf.get(TableInputFormat.SCAN_MAXVERSIONS) == null) { |
| // default to all versions unless explicitly set |
| s.setMaxVersions(Integer.MAX_VALUE); |
| } |
| s.setCacheBlocks(false); |
| // Set RowFilter or Prefix Filter if applicable. |
| Filter rowFilter = getRowFilter(args); |
| if (rowFilter!= null) { |
| LOG.info("Setting Row Filter for counter."); |
| s.setFilter(rowFilter); |
| } |
| // Set TimeRange if defined |
| long timeRange[] = getTimeRange(args); |
| if (timeRange != null) { |
| LOG.info("Setting TimeRange for counter."); |
| s.setTimeRange(timeRange[0], timeRange[1]); |
| } |
| return s; |
| } |
| |
| |
| private static Filter getRowFilter(String[] args) { |
| Filter rowFilter = null; |
| String filterCriteria = (args.length > 3) ? args[3]: null; |
| if (filterCriteria == null) return null; |
| if (filterCriteria.startsWith("^")) { |
| String regexPattern = filterCriteria.substring(1, filterCriteria.length()); |
| rowFilter = new RowFilter(CompareFilter.CompareOp.EQUAL, new RegexStringComparator(regexPattern)); |
| } else { |
| rowFilter = new PrefixFilter(Bytes.toBytesBinary(filterCriteria)); |
| } |
| return rowFilter; |
| } |
| |
| private static long[] getTimeRange(String[] args) throws IOException { |
| final String startTimeArgKey = "--starttime="; |
| final String endTimeArgKey = "--endtime="; |
| long startTime = 0L; |
| long endTime = 0L; |
| |
| for (int i = 1; i < args.length; i++) { |
| System.out.println("i:" + i + "arg[i]" + args[i]); |
| if (args[i].startsWith(startTimeArgKey)) { |
| startTime = Long.parseLong(args[i].substring(startTimeArgKey.length())); |
| } |
| if (args[i].startsWith(endTimeArgKey)) { |
| endTime = Long.parseLong(args[i].substring(endTimeArgKey.length())); |
| } |
| } |
| |
| if (startTime == 0 && endTime == 0) |
| return null; |
| |
| endTime = endTime == 0 ? HConstants.LATEST_TIMESTAMP : endTime; |
| return new long [] {startTime, endTime}; |
| } |
| |
| @Override |
| public int run(String[] args) throws Exception { |
| if (args.length < 2) { |
| System.err.println("ERROR: Wrong number of parameters: " + args.length); |
| System.err.println("Usage: CellCounter "); |
| System.err.println(" <tablename> <outputDir> <reportSeparator> [^[regex pattern] or " + |
| "[Prefix] for row filter]] --starttime=[starttime] --endtime=[endtime]"); |
| System.err.println(" Note: -D properties will be applied to the conf used. "); |
| System.err.println(" Additionally, all of the SCAN properties from TableInputFormat"); |
| System.err.println(" can be specified to get fine grained control on what is counted.."); |
| System.err.println(" -D " + TableInputFormat.SCAN_ROW_START + "=<rowkey>"); |
| System.err.println(" -D " + TableInputFormat.SCAN_ROW_STOP + "=<rowkey>"); |
| System.err.println(" -D " + TableInputFormat.SCAN_COLUMNS + "=\"<col1> <col2>...\""); |
| System.err.println(" -D " + TableInputFormat.SCAN_COLUMN_FAMILY + "=<familyName>"); |
| System.err.println(" -D " + TableInputFormat.SCAN_TIMESTAMP + "=<timestamp>"); |
| System.err.println(" -D " + TableInputFormat.SCAN_TIMERANGE_START + "=<timestamp>"); |
| System.err.println(" -D " + TableInputFormat.SCAN_TIMERANGE_END + "=<timestamp>"); |
| System.err.println(" -D " + TableInputFormat.SCAN_MAXVERSIONS + "=<count>"); |
| System.err.println(" -D " + TableInputFormat.SCAN_CACHEDROWS + "=<count>"); |
| System.err.println(" -D " + TableInputFormat.SCAN_BATCHSIZE + "=<count>"); |
| System.err.println(" <reportSeparator> parameter can be used to override the default report separator " + |
| "string : used to separate the rowId/column family name and qualifier name."); |
| System.err.println(" [^[regex pattern] or [Prefix] parameter can be used to limit the cell counter count " + |
| "operation to a limited subset of rows from the table based on regex or prefix pattern."); |
| return -1; |
| } |
| Job job = createSubmittableJob(getConf(), args); |
| return (job.waitForCompletion(true) ? 0 : 1); |
| } |
| |
| /** |
| * Main entry point. |
| * @param args The command line parameters. |
| * @throws Exception When running the job fails. |
| */ |
| public static void main(String[] args) throws Exception { |
| int errCode = ToolRunner.run(HBaseConfiguration.create(), new CellCounter(), args); |
| System.exit(errCode); |
| } |
| |
| } |