On Wed, May 25, 2011 at 01:07, Bing Wei blackice@gmail.com wrote:
Thanks, Brett.
I am still confused about the join process. I append the results of two maps
together, but get exceptions when I run the Shuffler.
The result of a map is a list. But the two map results have different
length.
On Mon, May 23, 2011 at 2:06 PM, Bing blackice@gmail.com wrote:
In the google io talk, data join is implemented by Append method. But
it seems the Append method is only to append lists together. Is that
Append method just a high-level concept or is there an implementation?
Also, join can
Thanks, Brett.
I am still confused about the join process. I append the results of two maps
together, but get exceptions when I run the Shuffler.
The result of a map is a list. But the two map results have different
length. Let's say the length of the first map result is 3, the length of the
In the google io talk, data join is implemented by Append method. But
it seems the Append method is only to append lists together. Is that
Append method just a high-level concept or is there an implementation?
Also, join can be implemented by using referenceProperty. It is not
necessary to do the
