how to preserve original line order?

[Roldano Cattoni]

The task should be simple, I want to put in uppercase all the words of a
(large) file.

I tried the following:
 - streaming mode
 - the mapper is a perl script that put each line in uppercase (number of
   mappers  1)
 - no reducer (number of reducers set to zero)

It works fine except for line order which is not preserved.

How to preserve the original line order?

I would appreciate any suggestion.

  Roldano

Re: how to preserve original line order?

[Miles Osborne]

associate with each line an identifier (eg line number) and afterwards
resort the data by that

Miles

2009/3/13 Roldano Cattoni catt...@fbk.eu:
 The task should be simple, I want to put in uppercase all the words of a
 (large) file.

 I tried the following:
  - streaming mode
  - the mapper is a perl script that put each line in uppercase (number of
   mappers  1)
  - no reducer (number of reducers set to zero)

 It works fine except for line order which is not preserved.

 How to preserve the original line order?

 I would appreciate any suggestion.

  Roldano





-- 
The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.