Hi Sugandha, Take gz file as an example, It is not splittable because of the compression algorithm it is used. It can not guarantee that one record is located in one block, if one record is in 2 blocks, your program will crash since you can not get the whole record.
On Wed, Feb 26, 2014 at 1:24 PM, Sugandha Naolekar <[email protected]>wrote: > Hello, > > If a single file is split of size 129 MB is split in two halves/blocks of > HDFS as the max block size id 128 MB. And each of the blocks is read > depending on the InputFormat it supports. Thus, what is the significance of > isSplittable() method then? > > If it is set to false, entire block will be considered as single input > split? How will TextInputFormat react to it? > > > -- > Thanks & Regards, > Sugandha Naolekar > > > >
