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Pig, mail # user - What is the best way to do counting in pig?


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What is the best way to do counting in pig?
Sheng Guo 2012-07-02, 18:42
Hi all,

I used to use the following pig script to do the counting of the records.

m_skill_group = group m_skills_filter by member_id;
grpd = group m_skill_group all;
cnt = foreach grpd generate COUNT(m_skill_group);

cnt_filter = limit cnt 10;
dump cnt_filter;
but sometimes, when the records get larger, it takes lots of time and hang
up, and or die.
I thought counting should be simple enough, so what is the best way to do a
counting in pig?

Thanks!

Sheng
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Jonathan Coveney 2012-07-02, 20:20
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Sheng Guo 2012-07-02, 20:34
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Jonathan Coveney 2012-07-02, 20:41
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Subir S 2012-07-02, 20:51
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Sheng Guo 2012-07-02, 21:32
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Jonathan Coveney 2012-07-02, 21:31
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Subir S 2012-07-02, 21:35
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Ruslan Al-Fakikh 2012-07-03, 10:03
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Jonathan Coveney 2012-07-03, 16:56
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Sheng Guo 2012-07-09, 22:54
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Haitao Yao 2012-07-10, 02:28
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Jonathan Coveney 2012-07-10, 04:26
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Haitao Yao 2012-07-10, 05:06
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Haitao Yao 2012-07-10, 08:20
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Haitao Yao 2012-07-11, 06:50
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Jonathan Coveney 2012-07-11, 16:53
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Thejas Nair 2012-07-12, 00:56
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Haitao Yao 2012-07-12, 02:56
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Jonathan Coveney 2012-07-12, 02:58
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Haitao Yao 2012-08-09, 14:51