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Re: How does hive decide to launch how many map tasks? - Hive - [mail # user]
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...Hi, Bejoy. I find the mapred.min.split.size in mapred-default.xml, but there is no mapred.max.split.size property. I'm using hadoop 0.20.205.0. Maybe only newer versions support mapred...
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Author: Cheng Su,
2012-11-19, 07:01
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Re: How does hive decide to launch how many map tasks? - Hive - [mail # user]
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...Thank you so much :) On Fri, Nov 16, 2012 at 5:49 PM, Bejoy KS wrote: Regards, Cheng Su...
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Author: Cheng Su,
2012-11-16, 12:08
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Re: Do I need any Pig knowledge to learn Hive? - Hive - [mail # user]
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...Hi, Majid. I think you don't need know about pig, but it will help if you have some SQL knowledge. On Fri, Nov 16, 2012 at 5:26 PM, Majid Azimi wrote: Regards, Chen...
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Author: Cheng Su,
2012-11-16, 09:29
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Why hadoop job pending for so long? - Hive - [mail # user]
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...Hi, all. I am running some hive queries. I use hive 0.9.0 + hadoop 0.20.205.0 But some of them are pending for quite a long time, say 30min or even longer. I have enough free map...
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Author: Cheng Su,
2012-11-16, 09:00
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How does hive decide to launch how many map tasks? - Hive - [mail # user]
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...Hi, all How does hive decide to launch how many map tasks? I know there are some configs to help hive to decide how many reduce task to launch? But how about map tasks? I thought...
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Author: Cheng Su,
2012-11-16, 06:39
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Re: Can I merge files after I loaded them into hive? - Hive - [mail # user]
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...Thank you guys. I will try this later. And sorry for additional questions: if I do this, could the file become too big? Does hive have a config to control the max file size? Does hive can au...
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Author: Cheng Su,
2012-11-15, 10:41
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Re: Hive UDAF convert problem - Hive - [mail # user]
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...Thanks a lot. I will look into it. Actually I did change the source like what you suggested to avoid the convert exception. But I need to use some TreeMap method, so I had to check an...
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Author: Cheng Su,
2012-11-15, 08:45
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Can I merge files after I loaded them into hive? - Hive - [mail # user]
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...Hi, all. Can I merge files after I loaded them into hive? This is my situation: There is a log table partitioned by date, which is store the nginx access logs. The raw log files ...
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Author: Cheng Su,
2012-11-15, 08:03
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Hive UDAF convert problem - Hive - [mail # user]
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...Hi all. I'm writing a hive UDAF to calculate page view per session. Java source is blow: public class CalculateAvgPVPerSession extends UDAF { /** * @author Cheng Su * ...
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Author: Cheng Su,
2012-11-13, 04:01
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Re: Hbase connection closed when query multiple complicated hql with hive+hbase integration - Hive - [mail # user]
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...The exceptions seem to be another problem. They all happened on one node. And after the task attempts failed at that node, retried on other nodes and no exceptions. So that, the exception ma...
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Author: Cheng Su,
2012-11-07, 06:23
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