compressed files, getPosition reflects the position in the input stream of
the NEXT compressed block of data, so you have to watch for the change in
position after reading the key/value to capture a block transition.
Ahad.
On Thu, Oct 8, 2009 at 10:22 PM, Ahad Rana wrote:
Hi Ishwar,
You can implement a custom MapRunner and retrieve the position from the
reader before calling your map function. Be aware though, that for block
compressed files, the position returned represents block start position, not
the individual record position.
Ahad.
Hi Ishwar,
You can implement a custom MapRunner and retrieve the position from the
reader before calling your map function. Be aware though, that for block
compressed files, the position returned represents block start position, not
the individual record position.
Ahad.
On Thu, Oct 8, 2009 at 4:23 PM, ishwar ramani wrote:
Hi,
I need to get the position of the key being processed in a mapper task.
My inputFile is a sequence file ....
I tried the Context, but the best i could get was the inputsplit
position and the
file name ....
My other option is to start recording the pos in the key value while
generating
the sequence file.
But that would mean rewriting all the files i already have :(
any thoughts?
ishwar
Hi,
I need to get the position of the key being processed in a mapper task.
My inputFile is a sequence file ....
I tried the Context, but the best i could get was the inputsplit
position and the
file name ....
My other option is to start recording the pos in the key value while
generating
the sequence file.
But that would mean rewriting all the files i already have :(
any thoughts?
ishwar
