Mmap without mlock possible in datanodes?

[Ravikumar Govindarajan <ra...@gmail.com>]

Is it possible to use mmap alone instead of mlock for given paths in
data-nodes?

I am planning to use MMap for almost all of the files I write to
data-nodes, but obviously cannot pin down the blocks using mlock. When
swapping is very rare, such an option will be very helpful no?

Any help is much appreciated...

--
Ravi