Hadoop hdfs Tajo 메모 중

공부 메모 중

[환경]

 - centos 6.4

 - java 7

 - hadoop-2.7.3

 - tajo-0.11.3

[구성]

server1 : NameNode, TajoMaster

server2 : DataNode, TajoWorker (SecondaryNameNode)

server3 : DataNode, TajoWorker

server4 : DataNode, TajoWorker

# 클러스터 구성은 생략

bin/hadoop namenode -format # 초기화 시 rm -Rf /tmp/hadoop-tomcat 하고 나서
bin/start-all.sh

접속 http://192.168.100:50070/dfshealth.html

-- 데이터 : {"reg_dt":1474350438172,"jsessionid":"c09db86d-22c1-464b-92af-d612d7274c66","url_now":"http://ddakker.pe.kr/b","click_page_url":"http://ddakker.pe.kr/a","ip":"192.168.0.100","user_key":"1234567890","url_before":"http://ddakker.pe.kr/a","session_first_time":1474289056726,"user_agent":"Mozilla/5.0 (Windows NT 6.3; WOW64; Trident/7.0; rv:11.0) like Gecko"} 

bin/tsql

default> \dfs -mkdir /tajo

default> \dfs -ls /
Found 1 items
drwxr-xr-x   - hadoop supergroup          0 2016-09-20 15:27 /tajo

default> \dfs -put /logs/weblog /tajo/weblog

default> \dfs -du -s -h /tajo/weblog
1.5 G  /tajo/weblog

create external table weblog (
reg_dt INT8,
url_before text,
jsessionid text,
ip text,
url_now text,
click_page_url text,
user_key text,
session_first_time INT8)
USING JSON LOCATION 'hdfs:/tajo/weblog'; 

default> select count(*) from weblog;
Progress: 0%, response time: 0.465 sec
Progress: 0%, response time: 0.467 sec
Progress: 0%, response time: 0.869 sec
Progress: 0%, response time: 1.67 sec
Progress: 46%, response time: 2.672 sec
Progress: 100%, response time: 2.735 sec
?count
-------------------------------
3503135
(1 rows, 2.735 sec, 16 B selected)