| clear query|facets|time |
Search criteria: .
Results from 81 to 90 from
118 (6.083s).
|
|
|
Loading phrases to help you
refine your search...
|
|
Re: Hi - Hive - [mail # user]
|
|
...Hi Shaik Updates are not supported in hive. Still you can accomplish updates by over writing either a whole table or a partition. In short updates are not directly supported in ...
|
|
|
Author: Bejoy KS,
2012-07-04, 11:03
|
|
|
Re: Hive upload - Hive - [mail # user]
|
|
...Hi Yogesh The first issue (sqoop one). 1) Is the table newhive coming when you list tables using 'show table'? 2) Are you seeing a directory 'newhive' in your hive warte house dir(usua...
|
|
|
Author: Bejoy KS,
2012-07-04, 05:58
|
|
|
Re: Hive insert into - Hive - [mail # user]
|
|
...Hi Abhi When you say INSERT INTO in hive it needn't be a file append. In hive the data corresponding to a table/partition is in a directory, data is stored as one or more files within ...
|
|
|
Author: Bejoy KS,
2012-07-04, 05:35
|
|
|
Re: Obvious and not so obvious query optimzations in Hive - Hive - [mail # user]
|
|
...Hi Richin The Keys vary based on your queries on the same table. You can always see how your query will be parsed to map reduce jobs using EXPLAIN Statement. It'll give you which colum...
|
|
|
Author: Bejoy KS,
2012-06-28, 20:12
|
|
|
Re: Obvious and not so obvious query optimzations in Hive - Hive - [mail # user]
|
|
...Hi Richin The keys are chosen by hive based on the input unless you specify certain clauses as DISTRIBUTE BY in your query which gives the flexibility for user to decide on the key/col...
|
|
|
Author: Bejoy KS,
2012-06-28, 19:47
|
|
|
Re: Hive mapper creation - Hive - [mail # user]
|
|
...Hi Mohammed If it is to control the split size and there by the number of map tasks, you just need to play with min and max split size properties. Regards Bejoy KS Sent fro...
|
|
|
Author: Bejoy KS,
2012-06-28, 19:29
|
|
|
Re: Obvious and not so obvious query optimzations in Hive - Hive - [mail # user]
|
|
...Hi Richin In most cases to tune up queries you may have to explicitly specify the number of reduces based on the data size and available reduce slots in cluster. Reduce tasks and numbe...
|
|
|
Author: Bejoy KS,
2012-06-28, 19:16
|
|
|
Re: Hive mapper creation - Hive - [mail # user]
|
|
...Hi Mohammed Splits are associated with MapReduce framework and not necessarily with hive. It is the data processed by a mapper. Based on your InputFormat, min and max split size proper...
|
|
|
Author: Bejoy KS,
2012-06-28, 19:07
|
|
|
Re: Hive mapper creation - Hive - [mail # user]
|
|
...Hi Mohammed Internally In hive the processing is done using MapReduce. So like in mapreduce the splits are calculated on job submission and a mapper is assigned per split. So a mapper ...
|
|
|
Author: Bejoy KS,
2012-06-28, 18:52
|
|
|
Re: Obvious and not so obvious query optimzations in Hive - Hive - [mail # user]
|
|
...Hi Richin I'm not an AWS guy but still lemme try answering a few questions in general (not wrt AWS EMR) 1. Having my external table data gzipped and reading it in the table...
|
|
|
Author: Bejoy KS,
2012-06-27, 18:46
|
|
|
|
