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Hadoop
•   sasata299 (         )
•   Hadoop
•        NoSQL
•

•   http://blog.livedoor.jp/sasata299/
Hadoop

•   Google   MapReduce   OSS
•

•

•

•
•   Hadoop
•        Hadoop
•

•                 &   !?
•   Hadoop
•        Hadoop
•

•                 &   !?
896
30         3   1
896
30         3   1
896
30             3   1




           ”           ”
GROUP BY     !!




                   MySQL
(   3.5   )
GROUP BY     !!




                   MySQL
(   3.5   )




          7000
                           ≒292   ……orz
MySQL
…
※
!?
Hadoop
…
7000
 30
•   Hadoop
•        Hadoop
•

•                 &   !?
Hadoop
•   Hadoop Streaming
•         Ruby
•   Cloudera     CDH1           (0.18.3)
•   EC2   Hadoop
•                  10-50
•   Hadoop                 S3
Hadoop
•   Hadoop Streaming
•         Ruby
•   Cloudera     CDH1           (0.18.3)
•   EC2   Hadoop
•                  10-50
•   Hadoop                 S3
○○
××


○○
××
Hadoop
Hadoop   AWS
Hadoop
Hadoop




         Hadoop
            (EC2)
hadoop-ec2 push [cluster] mapper.rb
hadoop-ec2 push [cluster] reducer.rb




                                       Hadoop
                                          (EC2)
hadoop-ec2 push [cluster] mapper.rb
hadoop-ec2 push [cluster] reducer.rb




                                       Hadoop
                                          (EC2)
Hadoop

           hadoop-ec2 exec [cluster] [command]




Hadoop                                      S3
   (EC2)
Hadoop

           hadoop-ec2 exec [cluster] [command]




Hadoop                                      S3
   (EC2)
Hadoop

           hadoop-ec2 exec [cluster] [command]




Hadoop                                      S3
   (EC2)
Hadoop

           hadoop-ec2 exec [cluster] [command]




Hadoop                                      S3
   (EC2)
S3
S3
Hadoop




         Hadoop
            (EC2)
Hadoop
!!
Hadoop
1)
2) Hadoop
3)
•   Hadoop
•        Hadoop
•

•                 &   !?
target_ids # [21310,12902,15321,..]

ARGF.each do |log|
  log.chomp!
  id, foo, bar, ... = log.split(/,/)
  next if target_ids.include?(id)
end

  target_ids   5
                              …
:-)
#      1000
hash = Hash.new {|h,k| h[k] = []}
target_ids.each do |_id|
  hash[_id.to_s[0,3]] << _id
end

ARGF.each do |log|
  log.chomp!
  id, foo, bar, ... = log.split(/,/)
  #
  next if hash[id[0,3]].include?(id)
end
Mapper
Reducer
 - Mapper
 -


     Reducer
•   Hadoop
•        Hadoop
•

•                 &   !?
EC2
 -> AZ
 ->


            JobTracker
 -> 50030
 -> hadoop job -list
10h          8h
      JobTracker
!?
Amazon Elastic MapReduce
Elastic MapReduce
マーケティングのためのHadoop利用
マーケティングのためのHadoop利用

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マーケティングのためのHadoop利用

Editor's Notes