Basically if we have a table called table A which is mapped to a directory in hive /data/a . And n is the number of the files under /data/a with each row size s.
hive -e "select * from a limit 10"
To show the result very fast
hive.limit.optimize.limit.file < n
in this case will be 10
and the The hive.limit.row.max.size = s which may vary according the actual data.
Hope this helps.
The hive.limit.row.max.size control the size of each
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On Jan 24, 2013, at 3:12 PM, "Wu, James C." <[EMAIL PROTECTED]> wrote:
> Do anyone know the meaning of these hive settings? The description of them are not clear to me. If someone can give me an example of how they shall be used, it would be great!
> <description>When trying a smaller subset of data for simple LIMIT, how much size we need to guarantee
> each row to have at least.</description>
> <description>When trying a smaller subset of data for simple LIMIT, maximum number of files we can