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Posted to user@hive.apache.org by sandeep <sa...@huawei.com> on 2011/01/03 10:06:31 UTC

Regarding Number of Jobs Created for One Hive-Query

 

Hi,

 

While executing a query from hive ,a  Job will get created.

 

Please let me  know the Mapping Between Hive Query And the Jobs that are
created for that query. ?Is it One-One ?

 

Thanks

sandeep

 

 

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RE: Regarding Number of Jobs Created for One Hive-Query

Posted by sandeep <sa...@huawei.com>.
 

Thank you sreekanth .

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  _____  

From: Sreekanth Ramakrishnan [mailto:sreerama@yahoo-inc.com] 
Sent: Monday, January 03, 2011 2:42 PM
To: user@hive.apache.org; sandeep
Subject: Re: Regarding Number of Jobs Created for One Hive-Query

 

Hi Sandeep,

If you try running the explain query it will show you number of stages which
a query will use.  Each stage will correspond to a MapReduce job. Also,
there are conditional tasks, which points to one set of stage will be
executed in lieu of the other.

Please take a look at the following wiki link which explains it futher.

http://wiki.apache.org/hadoop/Hive/LanguageManual/Explain



On 1/3/11 2:36 PM, "sandeep" <sa...@huawei.com> wrote:


Hi,
 
While executing a query from hive ,a  Job will get created.
 
Please let me  know the Mapping Between Hive Query And the Jobs that are
created for that query. ?Is it One-One ?
 
Thanks
sandeep
 
 
****************************************************************************
***********
This e-mail and attachments contain confidential information from HUAWEI,
which is intended only for the person or entity whose address is listed
above. Any use of the information contained herein in any way (including,
but not limited to, total or partial disclosure, reproduction, or
dissemination) by persons other than the intended recipient's) is
prohibited. If you receive this e-mail in error, please notify the sender by
phone or email immediately and delete it!




-- 
Sreekanth Ramakrishnan

Re: Regarding Number of Jobs Created for One Hive-Query

Posted by Sreekanth Ramakrishnan <sr...@yahoo-inc.com>.
Hi Sandeep,

If you try running the explain query it will show you number of stages which a query will use.  Each stage will correspond to a MapReduce job. Also, there are conditional tasks, which points to one set of stage will be executed in lieu of the other.

Please take a look at the following wiki link which explains it futher.

http://wiki.apache.org/hadoop/Hive/LanguageManual/Explain



On 1/3/11 2:36 PM, "sandeep" <sa...@huawei.com> wrote:


Hi,

While executing a query from hive ,a  Job will get created.

Please let me  know the Mapping Between Hive Query And the Jobs that are created for that query. ?Is it One-One ?

Thanks
sandeep


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This e-mail and attachments contain confidential information from HUAWEI, which is intended only for the person or entity whose address is listed above. Any use of the information contained herein in any way (including, but not limited to, total or partial disclosure, reproduction, or dissemination) by persons other than the intended recipient's) is prohibited. If you receive this e-mail in error, please notify the sender by phone or email immediately and delete it!



--
Sreekanth Ramakrishnan