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[expand - 4 more] - Re: pig reduce OOM - Pig - [mail # user]
...I've found the reason: it's InternalCachedBag. I've posted all the details in a mail titled: What is the best way to do  counting in pig? I'm afraid I can not give you the mail link sin...
   Author: Haitao Yao, 2012-07-10, 14:49
Re: How to CONCAT multiple expressions - Pig - [mail # user]
...like this:   CONCAT(CONCAT('all', ':'), 'all')  It's ugly ,  but the concat only accepts 2 parameters. Here's the java  doc of CONCAT class: /**  * Generates the con...
   Author: Haitao Yao, 2012-07-10, 14:41
pig error message enhancement - Pig - [mail # user]
...hi, all I encountered an Exception like this:   ERROR org.apache.pig.tools.grunt.Grunt  -  org.apache.pig.impl.logicalLayer.FrontendException: ERROR 1000: Error  during ...
   Author: Haitao Yao, 2012-07-04, 03:17
[expand - 2 more] - Re: how can I distinct one field of a relation - Pig - [mail # user]
...will, not exactly. I want a subset of A with all fields, and field a1 is distinct. for example:  A is:  1,2,3 1,2,3 4,5,6  What I want is : 1,2,3 4,5,6  How can I do this...
   Author: Haitao Yao, 2012-06-27, 09:47
[expand - 1 more] - Re: how can I store multiple result once a time? - Pig - [mail # user]
...Yeah ,  union can do this.   But the real purpose for me is to reduce the map reduce job count .  Although I union 2 result sets into one, It still submit 2 map reduce  j...
   Author: Haitao Yao, 2012-03-02, 03:47
[expand - 1 more] - Re: How to run pig batch? - Pig - [mail # user]
...the pig script is generated by a system which is more than 4000 lines.    The pig client compile it for a long time.  I have solved the problem by dividing the big script &nbs...
   Author: Haitao Yao, 2012-02-21, 01:53
store the result with PigStorage - Pig - [mail # user]
...hi while using PigStorage ,  there will have _logs and _SUCCESS ,  which are useless .   How can store the result without _logs and _SUCCESS?   thanks....
   Author: Haitao Yao, 2012-02-17, 09:00
how can I store the result into local directory under distributed mode? - Pig - [mail # user]
...Hi, I want to store the result into local directory under  distributed hadoop env. How can I achieve this? With PigStorage, the result will be stored into HDFS. Is there any command ...
   Author: Haitao Yao, 2012-02-16, 03:15
[expand - 1 more] - Re: question about AVG - Pig - [mail # user]
...I solve this problem by extending the build in AVG function to accept  char array bag as input and calculate the result.  why the build-in AVG can not accept the char array bag and...
   Author: Haitao Yao, 2012-02-15, 08:59
[expand - 1 more] - Re: Generate Maps - Pig - [mail # user]
...The code pasted is wrong, sorry for my mistake.  here's the updated code:  @SuppressWarnings("rawtypes") public class HEDataConverter extends EvalFunc {   @Override public Ma...
   Author: Haitao Yao, 2012-02-09, 09:01
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB