pig的基本操作介绍
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pig是什么?
我的理解是: pig就相当于 shell , hadoop就相当于linux (所以我尽可能的会使用pig操作hadoop的文件)
1.进入HADOOP_HOME目录。
2.执行sh bin/hadoop
我们可以看到更多命令的说明信息:
Usage: hadoop [--config confdir] COMMAND
where COMMAND is one of:
namenode -format format the DFS filesystem
secondarynamenode run the DFS secondary namenode
namenode run the DFS namenode
datanode run a DFS datanode
dfsadmin run a DFS admin client
fsck run a DFS filesystem checking utility
fs run a generic filesystem user client
balancer run a cluster balancing utility
jobtracker run the MapReduce job Tracker node
pipes run a Pipes job
tasktracker run a MapReduce task Tracker node
job manipulate MapReduce jobs
queue get information regarding JobQueues
version print the version
jar run a jar file
distcp copy file or directories recursively
archive -archiveName NAME * create a hadoop archive
daemonlog get/set the log level for each daemon
or
CLASSNAME run the class named CLASSNAME
Most commands print help when invoked w/o parameters.
常用pig命令
ls/ pwd/ cd
例如: 查看文件大小
grunt> fs -du -h -s 文件名
19.4 G 文件名
grunt> help
Commands:
; - See the PigLatin manual for details: http://hadoop.apache.org/pig
File system commands:
fs - Equivalent to Hadoop dfs command: http://hadoop.apache.org/common/docs/current/hdfs_shell.html
Diagnostic commands:
describe [:: explain [-script ] [-out ] [-brief] [-dot|-xml] [-param =]
[-param_file ] [] - Show the execution plan to compute the alias or for entire script.
-script - Explain the entire script.
-out - Store the output into directory rather than print to stdout.
-brief - Don't expand nested plans (presenting a smaller graph for overview).
-dot - Generate the output in .dot format. Default is text format.
-xml - Generate the output in .xml format. Default is text format.
-param -param_file - See parameter substitution for details.
alias - Alias to explain.
dump - Compute the alias and writes the results to stdout.
Utility Commands:
exec [-param =param_value] [-param_file ]
基本
文件
流程
错误
SQL
调试
- 请求信息 : 2026-05-30 19:10:11 HTTP/1.1 GET : /article/pcdepi.html
- 运行时间 : 0.6958s ( Load:0.0086s Init:0.0017s Exec:0.6758s Template:0.0097s )
- 吞吐率 : 1.44req/s
- 内存开销 : 2,234.14 kb
- 查询信息 : 12 queries 5 writes
- 文件加载 : 36
- 缓存信息 : 0 gets 0 writes
- 配置加载 : 130
- 会话信息 : SESSION_ID=foun9ha6p5be6iff826gpu8431
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- [ app_init ] --START--
- Run Behavior\BuildLiteBehavior [ RunTime:0.000007s ]
- [ app_init ] --END-- [ RunTime:0.000044s ]
- [ app_begin ] --START--
- Run Behavior\ReadHtmlCacheBehavior [ RunTime:0.000413s ]
- [ app_begin ] --END-- [ RunTime:0.000445s ]
- [ view_parse ] --START--
- [ template_filter ] --START--
- Run Behavior\ContentReplaceBehavior [ RunTime:0.000054s ]
- [ template_filter ] --END-- [ RunTime:0.000078s ]
- Run Behavior\ParseTemplateBehavior [ RunTime:0.006424s ]
- [ view_parse ] --END-- [ RunTime:0.006456s ]
- [ view_filter ] --START--
- Run Behavior\WriteHtmlCacheBehavior [ RunTime:0.000155s ]
- [ view_filter ] --END-- [ RunTime:0.000169s ]
- [ app_end ] --START--
- 1064:You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') LIMIT 1' at line 1
[ SQL语句 ] : SELECT `id`,`pid`,`navname` FROM `cx_nav` WHERE ( id= ) LIMIT 1
- 1064:You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') LIMIT 1' at line 1
[ SQL语句 ] : SELECT `id`,`navname` FROM `cx_nav` WHERE ( id= ) LIMIT 1
- 1064:You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ')' at line 1
[ SQL语句 ] : SELECT `id`,`navname` FROM `cx_nav` WHERE ( pid= )
- [8] Undefined index: pid /www/wwwroot/tsicrk.com/App/Home/Controller/ArticleController.class.php 第 47 行.
- [8] Undefined index: db_host /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Db.class.php 第 120 行.
- [8] Undefined index: db_port /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Db.class.php 第 121 行.
- [8] Undefined index: db_name /www/wwwroot/tsicrk.com/ThinkPHP/Library/Think/Db.class.php 第 122 行.

0.6958s
