getSplits() in TableInputFormatBase

[john smith]

Hi ,

In the method  "public org.apache.hadoop.mapred.InputSplit[] *getSplits*
(org.apache.hadoop.mapred.JobConf job,

                                                       int numSplits) "

how is the "numSplits" decided ? I've seen differnt values of
numSplits for different MR jobs . Any reason for this ?

Also what if I ignore numsplits and always split at region
boundaries.I guess that , splitting at region boundaries makes more
sense and improves some what data locality.

Any comments on the above statement?

Thanks

j.S