Efficient read/write - Iterative M/R jobs

[Ioakim Perros]

Hi,

Is there any efficient way (beyond the trivial using TableMapReduceUtil 
/ TableOutputFormat) to perform faster read and write operations to 
tables ? Could anyone provide some example code of it ?

As of faster importing to table, I am aware of tools such as 
completebulkload, but I would prefer triggering such a process through 
M/R code, as I would like a whole table to be read and updated through 
iterations of M/R jobs.

Thanks in advance!
IP