OSX' HSF+ filesystem does not support sparse file so backing to disk is disabled on OSX in pool2 mapreduce engine. Since there appears to be no need to use mmap instead of normal file IO, we should switch to the latter in pool2 and enable backing to disk for OSX.
OSX' HSF+ filesystem does not support sparse file so backing to disk is disabled on OSX in pool2 mapreduce engine. Since there appears to be no need to use mmap instead of normal file IO, we should switch to the latter in pool2 and enable backing to disk for OSX.