Hadoop家族系列文章，主要介紹Hadoop家族產品，常用的項目包括Hadoop, Hive, Pig, HBase, Sqoop, Mahout, Zookeeper, Avro, Ambari, Chukwa，新增加的項目包括，YARN, Hcatalog, Oozie, Cassandra, Hama, Whirr, Flume, Bigtop, Crunch, Hue等。
從2011年開始，中國進入大數據風起云涌的時代，以Hadoop為代表的家族軟件，占據了大數據處理的廣闊地盤。開源界及廠商，所有數據軟件，無一不向Hadoop靠攏。Hadoop也從小眾的高富帥領域，變成了大數據開發的標準。在Hadoop原有技術基礎之上，出現了Hadoop家族產品，通過“大數據”概念不斷創新，推出科技進步。
作為IT界的開發人員，我們也要跟上節奏，抓住機遇，跟著Hadoop一起雄起！
關于作者：
- 張丹(Conan), 程序員Java,R,PHP,Javascript
- weibo：@Conan_Z
- blog:?http://blog.fens.me
- email: bsspirit@gmail.com
轉載請注明出處：
http://blog.fens.me/hadoop-mahout-mapreduce-itemcf/
前言
Mahout是Hadoop家族一員，從血緣就繼承了Hadoop程序的特點，支持HDFS訪問和MapReduce分步式算法。隨著Mahout的發展，從0.7版本開始，Mahout做了重大的升級。移除了部分算法的單機內存計算，只支持基于Hadoop的MapReduce平行計算。
從這點上，我們能看出Mahout走向大數據，堅持并行化的決心！相信在Hadoop的大框架下，Mahout最終能成為一個大數據的明星產品！
目錄
Mahout開發環境介紹 Mahout基于Hadoop的分步環境介紹 用Mahout實現協同過濾ItemCF 模板項目上傳github
1. Mahout開發環境介紹
在?用Maven構建Mahout項目?文章中，我們已經配置好了基于Maven的Mahout的開發環境，我們將繼續完成Mahout的分步式的程序開發。
本文的mahout版本為0.8。
開發環境：
- Win7 64bit
- Java 1.6.0_45
- Maven 3
- Eclipse Juno Service Release 2
- Mahout 0.8
- Hadoop 1.1.2
找到pom.xml，修改mahout版本為0.8
<mahout.version>0.8</mahout.version>
然后，下載依賴庫。
~ mvn clean install
由于 org.conan.mymahout.cluster06.Kmeans.java 類代碼，是基于mahout-0.6的，所以會報錯。我們可以先注釋這個文件。
2. Mahout基于Hadoop的分步環境介紹
如上圖所示，我們可以選擇在win7中開發，也可以在linux中開發，開發過程我們可以在本地環境進行調試，標配的工具都是Maven和Eclipse。
Mahout在運行過程中，會把MapReduce的算法程序包，自動發布的Hadoop的集群環境中，這種開發和運行模式，就和真正的生產環境差不多了。
3. 用Mahout實現協同過濾ItemCF
實現步驟:
- 1. 準備數據文件: item.csv
- 2. Java程序：HdfsDAO.java
- 3. Java程序：ItemCFHadoop.java
- 4. 運行程序
- 5. 推薦結果解讀
1). 準備數據文件: item.csv
上傳測試數據到HDFS，單機內存實驗請參考文章：用Maven構建Mahout項目
~ hadoop fs -mkdir /user/hdfs/userCF
~ hadoop fs -copyFromLocal /home/conan/datafiles/item.csv /user/hdfs/userCF~ hadoop fs -cat /user/hdfs/userCF/item.csv
1,101,5.0
1,102,3.0
1,103,2.5
2,101,2.0
2,102,2.5
2,103,5.0
2,104,2.0
3,101,2.5
3,104,4.0
3,105,4.5
3,107,5.0
4,101,5.0
4,103,3.0
4,104,4.5
4,106,4.0
5,101,4.0
5,102,3.0
5,103,2.0
5,104,4.0
5,105,3.5
5,106,4.0
2). Java程序：HdfsDAO.java
HdfsDAO.java，是一個HDFS操作的工具，用API實現Hadoop的各種HDFS命令，請參考文章：Hadoop編程調用HDFS
我們這里會用到HdfsDAO.java類中的一些方法：
HdfsDAO hdfs = new HdfsDAO(HDFS, conf);hdfs.rmr(inPath);hdfs.mkdirs(inPath);hdfs.copyFile(localFile, inPath);hdfs.ls(inPath);hdfs.cat(inFile);
3). Java程序：ItemCFHadoop.java
用Mahout實現分步式算法，我們看到Mahout in Action中的解釋。
實現程序：
package org.conan.mymahout.recommendation;import org.apache.hadoop.mapred.JobConf;
import org.apache.mahout.cf.taste.hadoop.item.RecommenderJob;
import org.conan.mymahout.hdfs.HdfsDAO;public class ItemCFHadoop {private static final String HDFS = "hdfs://192.168.1.210:9000";public static void main(String[] args) throws Exception {String localFile = "datafile/item.csv";String inPath = HDFS + "/user/hdfs/userCF";String inFile = inPath + "/item.csv";String outPath = HDFS + "/user/hdfs/userCF/result/";String outFile = outPath + "/part-r-00000";String tmpPath = HDFS + "/tmp/" + System.currentTimeMillis();JobConf conf = config();HdfsDAO hdfs = new HdfsDAO(HDFS, conf);hdfs.rmr(inPath);hdfs.mkdirs(inPath);hdfs.copyFile(localFile, inPath);hdfs.ls(inPath);hdfs.cat(inFile);StringBuilder sb = new StringBuilder();sb.append("--input ").append(inPath);sb.append(" --output ").append(outPath);sb.append(" --booleanData true");sb.append(" --similarityClassname org.apache.mahout.math.hadoop.similarity.cooccurrence.measures.EuclideanDistanceSimilarity");sb.append(" --tempDir ").append(tmpPath);args = sb.toString().split(" ");RecommenderJob job = new RecommenderJob();job.setConf(conf);job.run(args);hdfs.cat(outFile);}public static JobConf config() {JobConf conf = new JobConf(ItemCFHadoop.class);conf.setJobName("ItemCFHadoop");conf.addResource("classpath:/hadoop/core-site.xml");conf.addResource("classpath:/hadoop/hdfs-site.xml");conf.addResource("classpath:/hadoop/mapred-site.xml");return conf;}
}
RecommenderJob.java，實際上就是封裝了，上面整個圖的分步式并行算法的執行過程！如果沒有這層封裝，我們需要自己去實現圖中8個步驟MapReduce算法。
關于上面算法的深度剖析，請參考文章：R實現MapReduce的協同過濾算法
4). 運行程序
控制臺輸出：
Delete: hdfs://192.168.1.210:9000/user/hdfs/userCF
Create: hdfs://192.168.1.210:9000/user/hdfs/userCF
copy from: datafile/item.csv to hdfs://192.168.1.210:9000/user/hdfs/userCF
ls: hdfs://192.168.1.210:9000/user/hdfs/userCF
==========================================================
name: hdfs://192.168.1.210:9000/user/hdfs/userCF/item.csv, folder: false, size: 229
==========================================================
cat: hdfs://192.168.1.210:9000/user/hdfs/userCF/item.csv
1,101,5.0
1,102,3.0
1,103,2.5
2,101,2.0
2,102,2.5
2,103,5.0
2,104,2.0
3,101,2.5
3,104,4.0
3,105,4.5
3,107,5.0
4,101,5.0
4,103,3.0
4,104,4.5
4,106,4.0
5,101,4.0
5,102,3.0
5,103,2.0
5,104,4.0
5,105,3.5
5,106,4.0SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
2013-10-14 10:26:35 org.apache.hadoop.util.NativeCodeLoader
警告: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
2013-10-14 10:26:35 org.apache.hadoop.mapreduce.lib.input.FileInputFormat listStatus
信息: Total input paths to process : 1
2013-10-14 10:26:35 org.apache.hadoop.io.compress.snappy.LoadSnappy
警告: Snappy native library not loaded
2013-10-14 10:26:36 org.apache.hadoop.mapred.JobClient monitorAndPrintJob
信息: Running job: job_local_0001
2013-10-14 10:26:36 org.apache.hadoop.mapred.Task initialize
信息: Using ResourceCalculatorPlugin : null
2013-10-14 10:26:36 org.apache.hadoop.mapred.MapTask$MapOutputBuffer
信息: io.sort.mb = 100
2013-10-14 10:26:36 org.apache.hadoop.mapred.MapTask$MapOutputBuffer
信息: data buffer = 79691776/99614720
2013-10-14 10:26:36 org.apache.hadoop.mapred.MapTask$MapOutputBuffer
信息: record buffer = 262144/327680
2013-10-14 10:26:36 org.apache.hadoop.mapred.MapTask$MapOutputBuffer flush
信息: Starting flush of map output
2013-10-14 10:26:36 org.apache.hadoop.io.compress.CodecPool getCompressor
信息: Got brand-new compressor
2013-10-14 10:26:36 org.apache.hadoop.mapred.MapTask$MapOutputBuffer sortAndSpill
信息: Finished spill 0
2013-10-14 10:26:36 org.apache.hadoop.mapred.Task done
信息: Task:attempt_local_0001_m_000000_0 is done. And is in the process of commiting
2013-10-14 10:26:36 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:36 org.apache.hadoop.mapred.Task sendDone
信息: Task 'attempt_local_0001_m_000000_0' done.
2013-10-14 10:26:36 org.apache.hadoop.mapred.Task initialize
信息: Using ResourceCalculatorPlugin : null
2013-10-14 10:26:36 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:36 org.apache.hadoop.mapred.Merger$MergeQueue merge
信息: Merging 1 sorted segments
2013-10-14 10:26:36 org.apache.hadoop.io.compress.CodecPool getDecompressor
信息: Got brand-new decompressor
2013-10-14 10:26:36 org.apache.hadoop.mapred.Merger$MergeQueue merge
信息: Down to the last merge-pass, with 1 segments left of total size: 42 bytes
2013-10-14 10:26:36 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:36 org.apache.hadoop.mapred.Task done
信息: Task:attempt_local_0001_r_000000_0 is done. And is in the process of commiting
2013-10-14 10:26:36 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:36 org.apache.hadoop.mapred.Task commit
信息: Task attempt_local_0001_r_000000_0 is allowed to commit now
2013-10-14 10:26:36 org.apache.hadoop.mapreduce.lib.output.FileOutputCommitter commitTask
信息: Saved output of task 'attempt_local_0001_r_000000_0' to hdfs://192.168.1.210:9000/tmp/1381717594500/preparePreferenceMatrix/itemIDIndex
2013-10-14 10:26:36 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息: reduce > reduce
2013-10-14 10:26:36 org.apache.hadoop.mapred.Task sendDone
信息: Task 'attempt_local_0001_r_000000_0' done.
2013-10-14 10:26:37 org.apache.hadoop.mapred.JobClient monitorAndPrintJob
信息: map 100% reduce 100%
2013-10-14 10:26:37 org.apache.hadoop.mapred.JobClient monitorAndPrintJob
信息: Job complete: job_local_0001
2013-10-14 10:26:37 org.apache.hadoop.mapred.Counters log
信息: Counters: 19
2013-10-14 10:26:37 org.apache.hadoop.mapred.Counters log
信息: File Output Format Counters
2013-10-14 10:26:37 org.apache.hadoop.mapred.Counters log
信息: Bytes Written=187
2013-10-14 10:26:37 org.apache.hadoop.mapred.Counters log
信息: FileSystemCounters
2013-10-14 10:26:37 org.apache.hadoop.mapred.Counters log
信息: FILE_BYTES_READ=3287330
2013-10-14 10:26:37 org.apache.hadoop.mapred.Counters log
信息: HDFS_BYTES_READ=916
2013-10-14 10:26:37 org.apache.hadoop.mapred.Counters log
信息: FILE_BYTES_WRITTEN=3443292
2013-10-14 10:26:37 org.apache.hadoop.mapred.Counters log
信息: HDFS_BYTES_WRITTEN=645
2013-10-14 10:26:37 org.apache.hadoop.mapred.Counters log
信息: File Input Format Counters
2013-10-14 10:26:37 org.apache.hadoop.mapred.Counters log
信息: Bytes Read=229
2013-10-14 10:26:37 org.apache.hadoop.mapred.Counters log
信息: Map-Reduce Framework
2013-10-14 10:26:37 org.apache.hadoop.mapred.Counters log
信息: Map output materialized bytes=46
2013-10-14 10:26:37 org.apache.hadoop.mapred.Counters log
信息: Map input records=21
2013-10-14 10:26:37 org.apache.hadoop.mapred.Counters log
信息: Reduce shuffle bytes=0
2013-10-14 10:26:37 org.apache.hadoop.mapred.Counters log
信息: Spilled Records=14
2013-10-14 10:26:37 org.apache.hadoop.mapred.Counters log
信息: Map output bytes=84
2013-10-14 10:26:37 org.apache.hadoop.mapred.Counters log
信息: Total committed heap usage (bytes)=376569856
2013-10-14 10:26:37 org.apache.hadoop.mapred.Counters log
信息: SPLIT_RAW_BYTES=116
2013-10-14 10:26:37 org.apache.hadoop.mapred.Counters log
信息: Combine input records=21
2013-10-14 10:26:37 org.apache.hadoop.mapred.Counters log
信息: Reduce input records=7
2013-10-14 10:26:37 org.apache.hadoop.mapred.Counters log
信息: Reduce input groups=7
2013-10-14 10:26:37 org.apache.hadoop.mapred.Counters log
信息: Combine output records=7
2013-10-14 10:26:37 org.apache.hadoop.mapred.Counters log
信息: Reduce output records=7
2013-10-14 10:26:37 org.apache.hadoop.mapred.Counters log
信息: Map output records=21
2013-10-14 10:26:37 org.apache.hadoop.mapreduce.lib.input.FileInputFormat listStatus
信息: Total input paths to process : 1
2013-10-14 10:26:37 org.apache.hadoop.mapred.JobClient monitorAndPrintJob
信息: Running job: job_local_0002
2013-10-14 10:26:37 org.apache.hadoop.mapred.Task initialize
信息: Using ResourceCalculatorPlugin : null
2013-10-14 10:26:37 org.apache.hadoop.mapred.MapTask$MapOutputBuffer
信息: io.sort.mb = 100
2013-10-14 10:26:37 org.apache.hadoop.mapred.MapTask$MapOutputBuffer
信息: data buffer = 79691776/99614720
2013-10-14 10:26:37 org.apache.hadoop.mapred.MapTask$MapOutputBuffer
信息: record buffer = 262144/327680
2013-10-14 10:26:37 org.apache.hadoop.mapred.MapTask$MapOutputBuffer flush
信息: Starting flush of map output
2013-10-14 10:26:37 org.apache.hadoop.mapred.MapTask$MapOutputBuffer sortAndSpill
信息: Finished spill 0
2013-10-14 10:26:37 org.apache.hadoop.mapred.Task done
信息: Task:attempt_local_0002_m_000000_0 is done. And is in the process of commiting
2013-10-14 10:26:37 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:37 org.apache.hadoop.mapred.Task sendDone
信息: Task 'attempt_local_0002_m_000000_0' done.
2013-10-14 10:26:37 org.apache.hadoop.mapred.Task initialize
信息: Using ResourceCalculatorPlugin : null
2013-10-14 10:26:37 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:37 org.apache.hadoop.mapred.Merger$MergeQueue merge
信息: Merging 1 sorted segments
2013-10-14 10:26:37 org.apache.hadoop.mapred.Merger$MergeQueue merge
信息: Down to the last merge-pass, with 1 segments left of total size: 68 bytes
2013-10-14 10:26:37 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:37 org.apache.hadoop.mapred.Task done
信息: Task:attempt_local_0002_r_000000_0 is done. And is in the process of commiting
2013-10-14 10:26:37 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:37 org.apache.hadoop.mapred.Task commit
信息: Task attempt_local_0002_r_000000_0 is allowed to commit now
2013-10-14 10:26:37 org.apache.hadoop.mapreduce.lib.output.FileOutputCommitter commitTask
信息: Saved output of task 'attempt_local_0002_r_000000_0' to hdfs://192.168.1.210:9000/tmp/1381717594500/preparePreferenceMatrix/userVectors
2013-10-14 10:26:37 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息: reduce > reduce
2013-10-14 10:26:37 org.apache.hadoop.mapred.Task sendDone
信息: Task 'attempt_local_0002_r_000000_0' done.
2013-10-14 10:26:38 org.apache.hadoop.mapred.JobClient monitorAndPrintJob
信息: map 100% reduce 100%
2013-10-14 10:26:38 org.apache.hadoop.mapred.JobClient monitorAndPrintJob
信息: Job complete: job_local_0002
2013-10-14 10:26:38 org.apache.hadoop.mapred.Counters log
信息: Counters: 20
2013-10-14 10:26:38 org.apache.hadoop.mapred.Counters log
信息: org.apache.mahout.cf.taste.hadoop.item.ToUserVectorsReducer$Counters
2013-10-14 10:26:38 org.apache.hadoop.mapred.Counters log
信息: USERS=5
2013-10-14 10:26:38 org.apache.hadoop.mapred.Counters log
信息: File Output Format Counters
2013-10-14 10:26:38 org.apache.hadoop.mapred.Counters log
信息: Bytes Written=288
2013-10-14 10:26:38 org.apache.hadoop.mapred.Counters log
信息: FileSystemCounters
2013-10-14 10:26:38 org.apache.hadoop.mapred.Counters log
信息: FILE_BYTES_READ=6574274
2013-10-14 10:26:38 org.apache.hadoop.mapred.Counters log
信息: HDFS_BYTES_READ=1374
2013-10-14 10:26:38 org.apache.hadoop.mapred.Counters log
信息: FILE_BYTES_WRITTEN=6887592
2013-10-14 10:26:38 org.apache.hadoop.mapred.Counters log
信息: HDFS_BYTES_WRITTEN=1120
2013-10-14 10:26:38 org.apache.hadoop.mapred.Counters log
信息: File Input Format Counters
2013-10-14 10:26:38 org.apache.hadoop.mapred.Counters log
信息: Bytes Read=229
2013-10-14 10:26:38 org.apache.hadoop.mapred.Counters log
信息: Map-Reduce Framework
2013-10-14 10:26:38 org.apache.hadoop.mapred.Counters log
信息: Map output materialized bytes=72
2013-10-14 10:26:38 org.apache.hadoop.mapred.Counters log
信息: Map input records=21
2013-10-14 10:26:38 org.apache.hadoop.mapred.Counters log
信息: Reduce shuffle bytes=0
2013-10-14 10:26:38 org.apache.hadoop.mapred.Counters log
信息: Spilled Records=42
2013-10-14 10:26:38 org.apache.hadoop.mapred.Counters log
信息: Map output bytes=63
2013-10-14 10:26:38 org.apache.hadoop.mapred.Counters log
信息: Total committed heap usage (bytes)=575930368
2013-10-14 10:26:38 org.apache.hadoop.mapred.Counters log
信息: SPLIT_RAW_BYTES=116
2013-10-14 10:26:38 org.apache.hadoop.mapred.Counters log
信息: Combine input records=0
2013-10-14 10:26:38 org.apache.hadoop.mapred.Counters log
信息: Reduce input records=21
2013-10-14 10:26:38 org.apache.hadoop.mapred.Counters log
信息: Reduce input groups=5
2013-10-14 10:26:38 org.apache.hadoop.mapred.Counters log
信息: Combine output records=0
2013-10-14 10:26:38 org.apache.hadoop.mapred.Counters log
信息: Reduce output records=5
2013-10-14 10:26:38 org.apache.hadoop.mapred.Counters log
信息: Map output records=21
2013-10-14 10:26:38 org.apache.hadoop.mapreduce.lib.input.FileInputFormat listStatus
信息: Total input paths to process : 1
2013-10-14 10:26:38 org.apache.hadoop.mapred.JobClient monitorAndPrintJob
信息: Running job: job_local_0003
2013-10-14 10:26:38 org.apache.hadoop.mapred.Task initialize
信息: Using ResourceCalculatorPlugin : null
2013-10-14 10:26:38 org.apache.hadoop.mapred.MapTask$MapOutputBuffer
信息: io.sort.mb = 100
2013-10-14 10:26:38 org.apache.hadoop.mapred.MapTask$MapOutputBuffer
信息: data buffer = 79691776/99614720
2013-10-14 10:26:38 org.apache.hadoop.mapred.MapTask$MapOutputBuffer
信息: record buffer = 262144/327680
2013-10-14 10:26:38 org.apache.hadoop.mapred.MapTask$MapOutputBuffer flush
信息: Starting flush of map output
2013-10-14 10:26:38 org.apache.hadoop.mapred.MapTask$MapOutputBuffer sortAndSpill
信息: Finished spill 0
2013-10-14 10:26:38 org.apache.hadoop.mapred.Task done
信息: Task:attempt_local_0003_m_000000_0 is done. And is in the process of commiting
2013-10-14 10:26:38 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:38 org.apache.hadoop.mapred.Task sendDone
信息: Task 'attempt_local_0003_m_000000_0' done.
2013-10-14 10:26:38 org.apache.hadoop.mapred.Task initialize
信息: Using ResourceCalculatorPlugin : null
2013-10-14 10:26:38 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:38 org.apache.hadoop.mapred.Merger$MergeQueue merge
信息: Merging 1 sorted segments
2013-10-14 10:26:38 org.apache.hadoop.mapred.Merger$MergeQueue merge
信息: Down to the last merge-pass, with 1 segments left of total size: 89 bytes
2013-10-14 10:26:38 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:38 org.apache.hadoop.mapred.Task done
信息: Task:attempt_local_0003_r_000000_0 is done. And is in the process of commiting
2013-10-14 10:26:38 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:38 org.apache.hadoop.mapred.Task commit
信息: Task attempt_local_0003_r_000000_0 is allowed to commit now
2013-10-14 10:26:38 org.apache.hadoop.mapreduce.lib.output.FileOutputCommitter commitTask
信息: Saved output of task 'attempt_local_0003_r_000000_0' to hdfs://192.168.1.210:9000/tmp/1381717594500/preparePreferenceMatrix/ratingMatrix
2013-10-14 10:26:38 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息: reduce > reduce
2013-10-14 10:26:38 org.apache.hadoop.mapred.Task sendDone
信息: Task 'attempt_local_0003_r_000000_0' done.
2013-10-14 10:26:39 org.apache.hadoop.mapred.JobClient monitorAndPrintJob
信息: map 100% reduce 100%
2013-10-14 10:26:39 org.apache.hadoop.mapred.JobClient monitorAndPrintJob
信息: Job complete: job_local_0003
2013-10-14 10:26:39 org.apache.hadoop.mapred.Counters log
信息: Counters: 21
2013-10-14 10:26:39 org.apache.hadoop.mapred.Counters log
信息: File Output Format Counters
2013-10-14 10:26:39 org.apache.hadoop.mapred.Counters log
信息: Bytes Written=335
2013-10-14 10:26:39 org.apache.hadoop.mapred.Counters log
信息: org.apache.mahout.cf.taste.hadoop.preparation.ToItemVectorsMapper$Elements
2013-10-14 10:26:39 org.apache.hadoop.mapred.Counters log
信息: USER_RATINGS_NEGLECTED=0
2013-10-14 10:26:39 org.apache.hadoop.mapred.Counters log
信息: USER_RATINGS_USED=21
2013-10-14 10:26:39 org.apache.hadoop.mapred.Counters log
信息: FileSystemCounters
2013-10-14 10:26:39 org.apache.hadoop.mapred.Counters log
信息: FILE_BYTES_READ=9861349
2013-10-14 10:26:39 org.apache.hadoop.mapred.Counters log
信息: HDFS_BYTES_READ=1950
2013-10-14 10:26:39 org.apache.hadoop.mapred.Counters log
信息: FILE_BYTES_WRITTEN=10331958
2013-10-14 10:26:39 org.apache.hadoop.mapred.Counters log
信息: HDFS_BYTES_WRITTEN=1751
2013-10-14 10:26:39 org.apache.hadoop.mapred.Counters log
信息: File Input Format Counters
2013-10-14 10:26:39 org.apache.hadoop.mapred.Counters log
信息: Bytes Read=288
2013-10-14 10:26:39 org.apache.hadoop.mapred.Counters log
信息: Map-Reduce Framework
2013-10-14 10:26:39 org.apache.hadoop.mapred.Counters log
信息: Map output materialized bytes=93
2013-10-14 10:26:39 org.apache.hadoop.mapred.Counters log
信息: Map input records=5
2013-10-14 10:26:39 org.apache.hadoop.mapred.Counters log
信息: Reduce shuffle bytes=0
2013-10-14 10:26:39 org.apache.hadoop.mapred.Counters log
信息: Spilled Records=14
2013-10-14 10:26:39 org.apache.hadoop.mapred.Counters log
信息: Map output bytes=336
2013-10-14 10:26:39 org.apache.hadoop.mapred.Counters log
信息: Total committed heap usage (bytes)=775290880
2013-10-14 10:26:39 org.apache.hadoop.mapred.Counters log
信息: SPLIT_RAW_BYTES=157
2013-10-14 10:26:39 org.apache.hadoop.mapred.Counters log
信息: Combine input records=21
2013-10-14 10:26:39 org.apache.hadoop.mapred.Counters log
信息: Reduce input records=7
2013-10-14 10:26:39 org.apache.hadoop.mapred.Counters log
信息: Reduce input groups=7
2013-10-14 10:26:39 org.apache.hadoop.mapred.Counters log
信息: Combine output records=7
2013-10-14 10:26:39 org.apache.hadoop.mapred.Counters log
信息: Reduce output records=7
2013-10-14 10:26:39 org.apache.hadoop.mapred.Counters log
信息: Map output records=21
2013-10-14 10:26:39 org.apache.hadoop.mapreduce.lib.input.FileInputFormat listStatus
信息: Total input paths to process : 1
2013-10-14 10:26:39 org.apache.hadoop.mapred.JobClient monitorAndPrintJob
信息: Running job: job_local_0004
2013-10-14 10:26:39 org.apache.hadoop.mapred.Task initialize
信息: Using ResourceCalculatorPlugin : null
2013-10-14 10:26:39 org.apache.hadoop.mapred.MapTask$MapOutputBuffer
信息: io.sort.mb = 100
2013-10-14 10:26:39 org.apache.hadoop.mapred.MapTask$MapOutputBuffer
信息: data buffer = 79691776/99614720
2013-10-14 10:26:39 org.apache.hadoop.mapred.MapTask$MapOutputBuffer
信息: record buffer = 262144/327680
2013-10-14 10:26:39 org.apache.hadoop.mapred.MapTask$MapOutputBuffer flush
信息: Starting flush of map output
2013-10-14 10:26:39 org.apache.hadoop.mapred.MapTask$MapOutputBuffer sortAndSpill
信息: Finished spill 0
2013-10-14 10:26:39 org.apache.hadoop.mapred.Task done
信息: Task:attempt_local_0004_m_000000_0 is done. And is in the process of commiting
2013-10-14 10:26:39 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:39 org.apache.hadoop.mapred.Task sendDone
信息: Task 'attempt_local_0004_m_000000_0' done.
2013-10-14 10:26:39 org.apache.hadoop.mapred.Task initialize
信息: Using ResourceCalculatorPlugin : null
2013-10-14 10:26:39 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:39 org.apache.hadoop.mapred.Merger$MergeQueue merge
信息: Merging 1 sorted segments
2013-10-14 10:26:39 org.apache.hadoop.mapred.Merger$MergeQueue merge
信息: Down to the last merge-pass, with 1 segments left of total size: 118 bytes
2013-10-14 10:26:39 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:39 org.apache.hadoop.mapred.Task done
信息: Task:attempt_local_0004_r_000000_0 is done. And is in the process of commiting
2013-10-14 10:26:39 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:39 org.apache.hadoop.mapred.Task commit
信息: Task attempt_local_0004_r_000000_0 is allowed to commit now
2013-10-14 10:26:39 org.apache.hadoop.mapreduce.lib.output.FileOutputCommitter commitTask
信息: Saved output of task 'attempt_local_0004_r_000000_0' to hdfs://192.168.1.210:9000/tmp/1381717594500/weights
2013-10-14 10:26:39 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息: reduce > reduce
2013-10-14 10:26:39 org.apache.hadoop.mapred.Task sendDone
信息: Task 'attempt_local_0004_r_000000_0' done.
2013-10-14 10:26:40 org.apache.hadoop.mapred.JobClient monitorAndPrintJob
信息: map 100% reduce 100%
2013-10-14 10:26:40 org.apache.hadoop.mapred.JobClient monitorAndPrintJob
信息: Job complete: job_local_0004
2013-10-14 10:26:40 org.apache.hadoop.mapred.Counters log
信息: Counters: 20
2013-10-14 10:26:40 org.apache.hadoop.mapred.Counters log
信息: File Output Format Counters
2013-10-14 10:26:40 org.apache.hadoop.mapred.Counters log
信息: Bytes Written=381
2013-10-14 10:26:40 org.apache.hadoop.mapred.Counters log
信息: FileSystemCounters
2013-10-14 10:26:40 org.apache.hadoop.mapred.Counters log
信息: FILE_BYTES_READ=13148476
2013-10-14 10:26:40 org.apache.hadoop.mapred.Counters log
信息: HDFS_BYTES_READ=2628
2013-10-14 10:26:40 org.apache.hadoop.mapred.Counters log
信息: FILE_BYTES_WRITTEN=13780408
2013-10-14 10:26:40 org.apache.hadoop.mapred.Counters log
信息: HDFS_BYTES_WRITTEN=2551
2013-10-14 10:26:40 org.apache.hadoop.mapred.Counters log
信息: File Input Format Counters
2013-10-14 10:26:40 org.apache.hadoop.mapred.Counters log
信息: Bytes Read=335
2013-10-14 10:26:40 org.apache.hadoop.mapred.Counters log
信息: org.apache.mahout.math.hadoop.similarity.cooccurrence.RowSimilarityJob$Counters
2013-10-14 10:26:40 org.apache.hadoop.mapred.Counters log
信息: ROWS=7
2013-10-14 10:26:40 org.apache.hadoop.mapred.Counters log
信息: Map-Reduce Framework
2013-10-14 10:26:40 org.apache.hadoop.mapred.Counters log
信息: Map output materialized bytes=122
2013-10-14 10:26:40 org.apache.hadoop.mapred.Counters log
信息: Map input records=7
2013-10-14 10:26:40 org.apache.hadoop.mapred.Counters log
信息: Reduce shuffle bytes=0
2013-10-14 10:26:40 org.apache.hadoop.mapred.Counters log
信息: Spilled Records=16
2013-10-14 10:26:40 org.apache.hadoop.mapred.Counters log
信息: Map output bytes=516
2013-10-14 10:26:40 org.apache.hadoop.mapred.Counters log
信息: Total committed heap usage (bytes)=974651392
2013-10-14 10:26:40 org.apache.hadoop.mapred.Counters log
信息: SPLIT_RAW_BYTES=158
2013-10-14 10:26:40 org.apache.hadoop.mapred.Counters log
信息: Combine input records=24
2013-10-14 10:26:40 org.apache.hadoop.mapred.Counters log
信息: Reduce input records=8
2013-10-14 10:26:40 org.apache.hadoop.mapred.Counters log
信息: Reduce input groups=8
2013-10-14 10:26:40 org.apache.hadoop.mapred.Counters log
信息: Combine output records=8
2013-10-14 10:26:40 org.apache.hadoop.mapred.Counters log
信息: Reduce output records=5
2013-10-14 10:26:40 org.apache.hadoop.mapred.Counters log
信息: Map output records=24
2013-10-14 10:26:40 org.apache.hadoop.mapreduce.lib.input.FileInputFormat listStatus
信息: Total input paths to process : 1
2013-10-14 10:26:40 org.apache.hadoop.mapred.JobClient monitorAndPrintJob
信息: Running job: job_local_0005
2013-10-14 10:26:40 org.apache.hadoop.mapred.Task initialize
信息: Using ResourceCalculatorPlugin : null
2013-10-14 10:26:40 org.apache.hadoop.mapred.MapTask$MapOutputBuffer
信息: io.sort.mb = 100
2013-10-14 10:26:40 org.apache.hadoop.mapred.MapTask$MapOutputBuffer
信息: data buffer = 79691776/99614720
2013-10-14 10:26:40 org.apache.hadoop.mapred.MapTask$MapOutputBuffer
信息: record buffer = 262144/327680
2013-10-14 10:26:40 org.apache.hadoop.mapred.MapTask$MapOutputBuffer flush
信息: Starting flush of map output
2013-10-14 10:26:40 org.apache.hadoop.mapred.MapTask$MapOutputBuffer sortAndSpill
信息: Finished spill 0
2013-10-14 10:26:40 org.apache.hadoop.mapred.Task done
信息: Task:attempt_local_0005_m_000000_0 is done. And is in the process of commiting
2013-10-14 10:26:40 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:40 org.apache.hadoop.mapred.Task sendDone
信息: Task 'attempt_local_0005_m_000000_0' done.
2013-10-14 10:26:40 org.apache.hadoop.mapred.Task initialize
信息: Using ResourceCalculatorPlugin : null
2013-10-14 10:26:40 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:40 org.apache.hadoop.mapred.Merger$MergeQueue merge
信息: Merging 1 sorted segments
2013-10-14 10:26:40 org.apache.hadoop.mapred.Merger$MergeQueue merge
信息: Down to the last merge-pass, with 1 segments left of total size: 121 bytes
2013-10-14 10:26:40 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:40 org.apache.hadoop.mapred.Task done
信息: Task:attempt_local_0005_r_000000_0 is done. And is in the process of commiting
2013-10-14 10:26:40 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:40 org.apache.hadoop.mapred.Task commit
信息: Task attempt_local_0005_r_000000_0 is allowed to commit now
2013-10-14 10:26:40 org.apache.hadoop.mapreduce.lib.output.FileOutputCommitter commitTask
信息: Saved output of task 'attempt_local_0005_r_000000_0' to hdfs://192.168.1.210:9000/tmp/1381717594500/pairwiseSimilarity
2013-10-14 10:26:40 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息: reduce > reduce
2013-10-14 10:26:40 org.apache.hadoop.mapred.Task sendDone
信息: Task 'attempt_local_0005_r_000000_0' done.
2013-10-14 10:26:41 org.apache.hadoop.mapred.JobClient monitorAndPrintJob
信息: map 100% reduce 100%
2013-10-14 10:26:41 org.apache.hadoop.mapred.JobClient monitorAndPrintJob
信息: Job complete: job_local_0005
2013-10-14 10:26:41 org.apache.hadoop.mapred.Counters log
信息: Counters: 21
2013-10-14 10:26:41 org.apache.hadoop.mapred.Counters log
信息: File Output Format Counters
2013-10-14 10:26:41 org.apache.hadoop.mapred.Counters log
信息: Bytes Written=392
2013-10-14 10:26:41 org.apache.hadoop.mapred.Counters log
信息: FileSystemCounters
2013-10-14 10:26:41 org.apache.hadoop.mapred.Counters log
信息: FILE_BYTES_READ=16435577
2013-10-14 10:26:41 org.apache.hadoop.mapred.Counters log
信息: HDFS_BYTES_READ=3488
2013-10-14 10:26:41 org.apache.hadoop.mapred.Counters log
信息: FILE_BYTES_WRITTEN=17230010
2013-10-14 10:26:41 org.apache.hadoop.mapred.Counters log
信息: HDFS_BYTES_WRITTEN=3408
2013-10-14 10:26:41 org.apache.hadoop.mapred.Counters log
信息: File Input Format Counters
2013-10-14 10:26:41 org.apache.hadoop.mapred.Counters log
信息: Bytes Read=381
2013-10-14 10:26:41 org.apache.hadoop.mapred.Counters log
信息: org.apache.mahout.math.hadoop.similarity.cooccurrence.RowSimilarityJob$Counters
2013-10-14 10:26:41 org.apache.hadoop.mapred.Counters log
信息: PRUNED_COOCCURRENCES=0
2013-10-14 10:26:41 org.apache.hadoop.mapred.Counters log
信息: COOCCURRENCES=57
2013-10-14 10:26:41 org.apache.hadoop.mapred.Counters log
信息: Map-Reduce Framework
2013-10-14 10:26:41 org.apache.hadoop.mapred.Counters log
信息: Map output materialized bytes=125
2013-10-14 10:26:41 org.apache.hadoop.mapred.Counters log
信息: Map input records=5
2013-10-14 10:26:41 org.apache.hadoop.mapred.Counters log
信息: Reduce shuffle bytes=0
2013-10-14 10:26:41 org.apache.hadoop.mapred.Counters log
信息: Spilled Records=14
2013-10-14 10:26:41 org.apache.hadoop.mapred.Counters log
信息: Map output bytes=744
2013-10-14 10:26:41 org.apache.hadoop.mapred.Counters log
信息: Total committed heap usage (bytes)=1174011904
2013-10-14 10:26:41 org.apache.hadoop.mapred.Counters log
信息: SPLIT_RAW_BYTES=129
2013-10-14 10:26:41 org.apache.hadoop.mapred.Counters log
信息: Combine input records=21
2013-10-14 10:26:41 org.apache.hadoop.mapred.Counters log
信息: Reduce input records=7
2013-10-14 10:26:41 org.apache.hadoop.mapred.Counters log
信息: Reduce input groups=7
2013-10-14 10:26:41 org.apache.hadoop.mapred.Counters log
信息: Combine output records=7
2013-10-14 10:26:41 org.apache.hadoop.mapred.Counters log
信息: Reduce output records=7
2013-10-14 10:26:41 org.apache.hadoop.mapred.Counters log
信息: Map output records=21
2013-10-14 10:26:41 org.apache.hadoop.mapreduce.lib.input.FileInputFormat listStatus
信息: Total input paths to process : 1
2013-10-14 10:26:41 org.apache.hadoop.mapred.JobClient monitorAndPrintJob
信息: Running job: job_local_0006
2013-10-14 10:26:41 org.apache.hadoop.mapred.Task initialize
信息: Using ResourceCalculatorPlugin : null
2013-10-14 10:26:41 org.apache.hadoop.mapred.MapTask$MapOutputBuffer
信息: io.sort.mb = 100
2013-10-14 10:26:41 org.apache.hadoop.mapred.MapTask$MapOutputBuffer
信息: data buffer = 79691776/99614720
2013-10-14 10:26:41 org.apache.hadoop.mapred.MapTask$MapOutputBuffer
信息: record buffer = 262144/327680
2013-10-14 10:26:41 org.apache.hadoop.mapred.MapTask$MapOutputBuffer flush
信息: Starting flush of map output
2013-10-14 10:26:41 org.apache.hadoop.mapred.MapTask$MapOutputBuffer sortAndSpill
信息: Finished spill 0
2013-10-14 10:26:41 org.apache.hadoop.mapred.Task done
信息: Task:attempt_local_0006_m_000000_0 is done. And is in the process of commiting
2013-10-14 10:26:41 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:41 org.apache.hadoop.mapred.Task sendDone
信息: Task 'attempt_local_0006_m_000000_0' done.
2013-10-14 10:26:41 org.apache.hadoop.mapred.Task initialize
信息: Using ResourceCalculatorPlugin : null
2013-10-14 10:26:41 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:41 org.apache.hadoop.mapred.Merger$MergeQueue merge
信息: Merging 1 sorted segments
2013-10-14 10:26:41 org.apache.hadoop.mapred.Merger$MergeQueue merge
信息: Down to the last merge-pass, with 1 segments left of total size: 158 bytes
2013-10-14 10:26:41 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:41 org.apache.hadoop.mapred.Task done
信息: Task:attempt_local_0006_r_000000_0 is done. And is in the process of commiting
2013-10-14 10:26:41 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:41 org.apache.hadoop.mapred.Task commit
信息: Task attempt_local_0006_r_000000_0 is allowed to commit now
2013-10-14 10:26:41 org.apache.hadoop.mapreduce.lib.output.FileOutputCommitter commitTask
信息: Saved output of task 'attempt_local_0006_r_000000_0' to hdfs://192.168.1.210:9000/tmp/1381717594500/similarityMatrix
2013-10-14 10:26:41 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息: reduce > reduce
2013-10-14 10:26:41 org.apache.hadoop.mapred.Task sendDone
信息: Task 'attempt_local_0006_r_000000_0' done.
2013-10-14 10:26:42 org.apache.hadoop.mapred.JobClient monitorAndPrintJob
信息: map 100% reduce 100%
2013-10-14 10:26:42 org.apache.hadoop.mapred.JobClient monitorAndPrintJob
信息: Job complete: job_local_0006
2013-10-14 10:26:42 org.apache.hadoop.mapred.Counters log
信息: Counters: 19
2013-10-14 10:26:42 org.apache.hadoop.mapred.Counters log
信息: File Output Format Counters
2013-10-14 10:26:42 org.apache.hadoop.mapred.Counters log
信息: Bytes Written=554
2013-10-14 10:26:42 org.apache.hadoop.mapred.Counters log
信息: FileSystemCounters
2013-10-14 10:26:42 org.apache.hadoop.mapred.Counters log
信息: FILE_BYTES_READ=19722740
2013-10-14 10:26:42 org.apache.hadoop.mapred.Counters log
信息: HDFS_BYTES_READ=4342
2013-10-14 10:26:42 org.apache.hadoop.mapred.Counters log
信息: FILE_BYTES_WRITTEN=20674772
2013-10-14 10:26:42 org.apache.hadoop.mapred.Counters log
信息: HDFS_BYTES_WRITTEN=4354
2013-10-14 10:26:42 org.apache.hadoop.mapred.Counters log
信息: File Input Format Counters
2013-10-14 10:26:42 org.apache.hadoop.mapred.Counters log
信息: Bytes Read=392
2013-10-14 10:26:42 org.apache.hadoop.mapred.Counters log
信息: Map-Reduce Framework
2013-10-14 10:26:42 org.apache.hadoop.mapred.Counters log
信息: Map output materialized bytes=162
2013-10-14 10:26:42 org.apache.hadoop.mapred.Counters log
信息: Map input records=7
2013-10-14 10:26:42 org.apache.hadoop.mapred.Counters log
信息: Reduce shuffle bytes=0
2013-10-14 10:26:42 org.apache.hadoop.mapred.Counters log
信息: Spilled Records=14
2013-10-14 10:26:42 org.apache.hadoop.mapred.Counters log
信息: Map output bytes=599
2013-10-14 10:26:42 org.apache.hadoop.mapred.Counters log
信息: Total committed heap usage (bytes)=1373372416
2013-10-14 10:26:42 org.apache.hadoop.mapred.Counters log
信息: SPLIT_RAW_BYTES=140
2013-10-14 10:26:42 org.apache.hadoop.mapred.Counters log
信息: Combine input records=25
2013-10-14 10:26:42 org.apache.hadoop.mapred.Counters log
信息: Reduce input records=7
2013-10-14 10:26:42 org.apache.hadoop.mapred.Counters log
信息: Reduce input groups=7
2013-10-14 10:26:42 org.apache.hadoop.mapred.Counters log
信息: Combine output records=7
2013-10-14 10:26:42 org.apache.hadoop.mapred.Counters log
信息: Reduce output records=7
2013-10-14 10:26:42 org.apache.hadoop.mapred.Counters log
信息: Map output records=25
2013-10-14 10:26:42 org.apache.hadoop.mapreduce.lib.input.FileInputFormat listStatus
信息: Total input paths to process : 1
2013-10-14 10:26:42 org.apache.hadoop.mapreduce.lib.input.FileInputFormat listStatus
信息: Total input paths to process : 1
2013-10-14 10:26:42 org.apache.hadoop.mapred.JobClient monitorAndPrintJob
信息: Running job: job_local_0007
2013-10-14 10:26:42 org.apache.hadoop.mapred.Task initialize
信息: Using ResourceCalculatorPlugin : null
2013-10-14 10:26:42 org.apache.hadoop.mapred.MapTask$MapOutputBuffer
信息: io.sort.mb = 100
2013-10-14 10:26:42 org.apache.hadoop.mapred.MapTask$MapOutputBuffer
信息: data buffer = 79691776/99614720
2013-10-14 10:26:42 org.apache.hadoop.mapred.MapTask$MapOutputBuffer
信息: record buffer = 262144/327680
2013-10-14 10:26:42 org.apache.hadoop.mapred.MapTask$MapOutputBuffer flush
信息: Starting flush of map output
2013-10-14 10:26:42 org.apache.hadoop.mapred.MapTask$MapOutputBuffer sortAndSpill
信息: Finished spill 0
2013-10-14 10:26:42 org.apache.hadoop.mapred.Task done
信息: Task:attempt_local_0007_m_000000_0 is done. And is in the process of commiting
2013-10-14 10:26:42 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:42 org.apache.hadoop.mapred.Task sendDone
信息: Task 'attempt_local_0007_m_000000_0' done.
2013-10-14 10:26:42 org.apache.hadoop.mapred.Task initialize
信息: Using ResourceCalculatorPlugin : null
2013-10-14 10:26:42 org.apache.hadoop.mapred.MapTask$MapOutputBuffer
信息: io.sort.mb = 100
2013-10-14 10:26:42 org.apache.hadoop.mapred.MapTask$MapOutputBuffer
信息: data buffer = 79691776/99614720
2013-10-14 10:26:42 org.apache.hadoop.mapred.MapTask$MapOutputBuffer
信息: record buffer = 262144/327680
2013-10-14 10:26:42 org.apache.hadoop.mapred.MapTask$MapOutputBuffer flush
信息: Starting flush of map output
2013-10-14 10:26:42 org.apache.hadoop.mapred.MapTask$MapOutputBuffer sortAndSpill
信息: Finished spill 0
2013-10-14 10:26:42 org.apache.hadoop.mapred.Task done
信息: Task:attempt_local_0007_m_000001_0 is done. And is in the process of commiting
2013-10-14 10:26:42 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:42 org.apache.hadoop.mapred.Task sendDone
信息: Task 'attempt_local_0007_m_000001_0' done.
2013-10-14 10:26:42 org.apache.hadoop.mapred.Task initialize
信息: Using ResourceCalculatorPlugin : null
2013-10-14 10:26:42 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:42 org.apache.hadoop.mapred.Merger$MergeQueue merge
信息: Merging 2 sorted segments
2013-10-14 10:26:42 org.apache.hadoop.io.compress.CodecPool getDecompressor
信息: Got brand-new decompressor
2013-10-14 10:26:42 org.apache.hadoop.mapred.Merger$MergeQueue merge
信息: Down to the last merge-pass, with 2 segments left of total size: 233 bytes
2013-10-14 10:26:42 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:42 org.apache.hadoop.mapred.Task done
信息: Task:attempt_local_0007_r_000000_0 is done. And is in the process of commiting
2013-10-14 10:26:42 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:42 org.apache.hadoop.mapred.Task commit
信息: Task attempt_local_0007_r_000000_0 is allowed to commit now
2013-10-14 10:26:42 org.apache.hadoop.mapreduce.lib.output.FileOutputCommitter commitTask
信息: Saved output of task 'attempt_local_0007_r_000000_0' to hdfs://192.168.1.210:9000/tmp/1381717594500/partialMultiply
2013-10-14 10:26:42 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息: reduce > reduce
2013-10-14 10:26:42 org.apache.hadoop.mapred.Task sendDone
信息: Task 'attempt_local_0007_r_000000_0' done.
2013-10-14 10:26:43 org.apache.hadoop.mapred.JobClient monitorAndPrintJob
信息: map 100% reduce 100%
2013-10-14 10:26:43 org.apache.hadoop.mapred.JobClient monitorAndPrintJob
信息: Job complete: job_local_0007
2013-10-14 10:26:43 org.apache.hadoop.mapred.Counters log
信息: Counters: 19
2013-10-14 10:26:43 org.apache.hadoop.mapred.Counters log
信息: File Output Format Counters
2013-10-14 10:26:43 org.apache.hadoop.mapred.Counters log
信息: Bytes Written=572
2013-10-14 10:26:43 org.apache.hadoop.mapred.Counters log
信息: FileSystemCounters
2013-10-14 10:26:43 org.apache.hadoop.mapred.Counters log
信息: FILE_BYTES_READ=34517913
2013-10-14 10:26:43 org.apache.hadoop.mapred.Counters log
信息: HDFS_BYTES_READ=8751
2013-10-14 10:26:43 org.apache.hadoop.mapred.Counters log
信息: FILE_BYTES_WRITTEN=36182630
2013-10-14 10:26:43 org.apache.hadoop.mapred.Counters log
信息: HDFS_BYTES_WRITTEN=7934
2013-10-14 10:26:43 org.apache.hadoop.mapred.Counters log
信息: File Input Format Counters
2013-10-14 10:26:43 org.apache.hadoop.mapred.Counters log
信息: Bytes Read=0
2013-10-14 10:26:43 org.apache.hadoop.mapred.Counters log
信息: Map-Reduce Framework
2013-10-14 10:26:43 org.apache.hadoop.mapred.Counters log
信息: Map output materialized bytes=241
2013-10-14 10:26:43 org.apache.hadoop.mapred.Counters log
信息: Map input records=12
2013-10-14 10:26:43 org.apache.hadoop.mapred.Counters log
信息: Reduce shuffle bytes=0
2013-10-14 10:26:43 org.apache.hadoop.mapred.Counters log
信息: Spilled Records=56
2013-10-14 10:26:43 org.apache.hadoop.mapred.Counters log
信息: Map output bytes=453
2013-10-14 10:26:43 org.apache.hadoop.mapred.Counters log
信息: Total committed heap usage (bytes)=2558459904
2013-10-14 10:26:43 org.apache.hadoop.mapred.Counters log
信息: SPLIT_RAW_BYTES=665
2013-10-14 10:26:43 org.apache.hadoop.mapred.Counters log
信息: Combine input records=0
2013-10-14 10:26:43 org.apache.hadoop.mapred.Counters log
信息: Reduce input records=28
2013-10-14 10:26:43 org.apache.hadoop.mapred.Counters log
信息: Reduce input groups=7
2013-10-14 10:26:43 org.apache.hadoop.mapred.Counters log
信息: Combine output records=0
2013-10-14 10:26:43 org.apache.hadoop.mapred.Counters log
信息: Reduce output records=7
2013-10-14 10:26:43 org.apache.hadoop.mapred.Counters log
信息: Map output records=28
2013-10-14 10:26:43 org.apache.hadoop.mapreduce.lib.input.FileInputFormat listStatus
信息: Total input paths to process : 1
2013-10-14 10:26:43 org.apache.hadoop.mapred.JobClient monitorAndPrintJob
信息: Running job: job_local_0008
2013-10-14 10:26:43 org.apache.hadoop.mapred.Task initialize
信息: Using ResourceCalculatorPlugin : null
2013-10-14 10:26:43 org.apache.hadoop.mapred.MapTask$MapOutputBuffer
信息: io.sort.mb = 100
2013-10-14 10:26:43 org.apache.hadoop.mapred.MapTask$MapOutputBuffer
信息: data buffer = 79691776/99614720
2013-10-14 10:26:43 org.apache.hadoop.mapred.MapTask$MapOutputBuffer
信息: record buffer = 262144/327680
2013-10-14 10:26:43 org.apache.hadoop.mapred.MapTask$MapOutputBuffer flush
信息: Starting flush of map output
2013-10-14 10:26:43 org.apache.hadoop.mapred.MapTask$MapOutputBuffer sortAndSpill
信息: Finished spill 0
2013-10-14 10:26:43 org.apache.hadoop.mapred.Task done
信息: Task:attempt_local_0008_m_000000_0 is done. And is in the process of commiting
2013-10-14 10:26:43 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:43 org.apache.hadoop.mapred.Task sendDone
信息: Task 'attempt_local_0008_m_000000_0' done.
2013-10-14 10:26:43 org.apache.hadoop.mapred.Task initialize
信息: Using ResourceCalculatorPlugin : null
2013-10-14 10:26:43 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:43 org.apache.hadoop.mapred.Merger$MergeQueue merge
信息: Merging 1 sorted segments
2013-10-14 10:26:43 org.apache.hadoop.mapred.Merger$MergeQueue merge
信息: Down to the last merge-pass, with 1 segments left of total size: 206 bytes
2013-10-14 10:26:43 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:43 org.apache.hadoop.mapred.Task done
信息: Task:attempt_local_0008_r_000000_0 is done. And is in the process of commiting
2013-10-14 10:26:43 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息:
2013-10-14 10:26:43 org.apache.hadoop.mapred.Task commit
信息: Task attempt_local_0008_r_000000_0 is allowed to commit now
2013-10-14 10:26:43 org.apache.hadoop.mapreduce.lib.output.FileOutputCommitter commitTask
信息: Saved output of task 'attempt_local_0008_r_000000_0' to hdfs://192.168.1.210:9000/user/hdfs/userCF/result
2013-10-14 10:26:43 org.apache.hadoop.mapred.LocalJobRunner$Job statusUpdate
信息: reduce > reduce
2013-10-14 10:26:43 org.apache.hadoop.mapred.Task sendDone
信息: Task 'attempt_local_0008_r_000000_0' done.
2013-10-14 10:26:44 org.apache.hadoop.mapred.JobClient monitorAndPrintJob
信息: map 100% reduce 100%
2013-10-14 10:26:44 org.apache.hadoop.mapred.JobClient monitorAndPrintJob
信息: Job complete: job_local_0008
2013-10-14 10:26:44 org.apache.hadoop.mapred.Counters log
信息: Counters: 19
2013-10-14 10:26:44 org.apache.hadoop.mapred.Counters log
信息: File Output Format Counters
2013-10-14 10:26:44 org.apache.hadoop.mapred.Counters log
信息: Bytes Written=217
2013-10-14 10:26:44 org.apache.hadoop.mapred.Counters log
信息: FileSystemCounters
2013-10-14 10:26:44 org.apache.hadoop.mapred.Counters log
信息: FILE_BYTES_READ=26299802
2013-10-14 10:26:44 org.apache.hadoop.mapred.Counters log
信息: HDFS_BYTES_READ=7357
2013-10-14 10:26:44 org.apache.hadoop.mapred.Counters log
信息: FILE_BYTES_WRITTEN=27566408
2013-10-14 10:26:44 org.apache.hadoop.mapred.Counters log
信息: HDFS_BYTES_WRITTEN=6269
2013-10-14 10:26:44 org.apache.hadoop.mapred.Counters log
信息: File Input Format Counters
2013-10-14 10:26:44 org.apache.hadoop.mapred.Counters log
信息: Bytes Read=572
2013-10-14 10:26:44 org.apache.hadoop.mapred.Counters log
信息: Map-Reduce Framework
2013-10-14 10:26:44 org.apache.hadoop.mapred.Counters log
信息: Map output materialized bytes=210
2013-10-14 10:26:44 org.apache.hadoop.mapred.Counters log
信息: Map input records=7
2013-10-14 10:26:44 org.apache.hadoop.mapred.Counters log
信息: Reduce shuffle bytes=0
2013-10-14 10:26:44 org.apache.hadoop.mapred.Counters log
信息: Spilled Records=42
2013-10-14 10:26:44 org.apache.hadoop.mapred.Counters log
信息: Map output bytes=927
2013-10-14 10:26:44 org.apache.hadoop.mapred.Counters log
信息: Total committed heap usage (bytes)=1971453952
2013-10-14 10:26:44 org.apache.hadoop.mapred.Counters log
信息: SPLIT_RAW_BYTES=137
2013-10-14 10:26:44 org.apache.hadoop.mapred.Counters log
信息: Combine input records=0
2013-10-14 10:26:44 org.apache.hadoop.mapred.Counters log
信息: Reduce input records=21
2013-10-14 10:26:44 org.apache.hadoop.mapred.Counters log
信息: Reduce input groups=5
2013-10-14 10:26:44 org.apache.hadoop.mapred.Counters log
信息: Combine output records=0
2013-10-14 10:26:44 org.apache.hadoop.mapred.Counters log
信息: Reduce output records=5
2013-10-14 10:26:44 org.apache.hadoop.mapred.Counters log
信息: Map output records=21
cat: hdfs://192.168.1.210:9000/user/hdfs/userCF/result//part-r-00000
1 [104:1.280239,106:1.1462644,105:1.0653841,107:0.33333334]
2 [106:1.560478,105:1.4795978,107:0.69935876]
3 [103:1.2475469,106:1.1944525,102:1.1462644]
4 [102:1.6462644,105:1.5277859,107:0.69935876]
5 [107:1.1993587]
5). 推薦結果解讀
我們可以把上面的日志分解析成3個部分解讀
- a. 初始化環境
- b. 算法執行
- c. 打印推薦結果
a. 初始化環境
出初HDFS的數據目錄和工作目錄，并上傳數據文件。
Delete: hdfs://192.168.1.210:9000/user/hdfs/userCF
Create: hdfs://192.168.1.210:9000/user/hdfs/userCF
copy from: datafile/item.csv to hdfs://192.168.1.210:9000/user/hdfs/userCF
ls: hdfs://192.168.1.210:9000/user/hdfs/userCF
==========================================================
name: hdfs://192.168.1.210:9000/user/hdfs/userCF/item.csv, folder: false, size: 229
==========================================================
cat: hdfs://192.168.1.210:9000/user/hdfs/userCF/item.csv
b. 算法執行
分別執行，上圖中對應的8種MapReduce算法。
Job complete: job_local_0001
Job complete: job_local_0002
Job complete: job_local_0003
Job complete: job_local_0004
Job complete: job_local_0005
Job complete: job_local_0006
Job complete: job_local_0007
Job complete: job_local_0008
c. 打印推薦結果
方便我們看到計算后的推薦結果
cat: hdfs://192.168.1.210:9000/user/hdfs/userCF/result//part-r-00000
1 [104:1.280239,106:1.1462644,105:1.0653841,107:0.33333334]
2 [106:1.560478,105:1.4795978,107:0.69935876]
3 [103:1.2475469,106:1.1944525,102:1.1462644]
4 [102:1.6462644,105:1.5277859,107:0.69935876]
5 [107:1.1993587]
4. 模板項目上傳github
https://github.com/bsspirit/maven_mahout_template/tree/mahout-0.8
大家可以下載這個項目，做為開發的起點。
~ git clone https://github.com/bsspirit/maven_mahout_template
~ git checkout mahout-0.8
我們完成了基于物品的協同過濾分步式算法實現，下面將繼續介紹Mahout的Kmeans的分步式算法實現，請參考文章：Mahout分步式程序開發 聚類Kmeans
轉載請注明出處：
http://blog.fens.me/hadoop-mahout-mapreduce-itemcf/
總結
以上是生活随笔為你收集整理的Mahout分步式程序开发 基于物品的协同过滤ItemCF的全部內容，希望文章能夠幫你解決所遇到的問題。
如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。
