If they are already in JT's FS, it does not copy them. It copies them only if they are on local FS or some other FS.
On 7/6/10 2:23 PM, "zhangguoping zhangguoping" <[email protected]> wrote: I wonder why hadoop wants to copy the files to jobtracker's filesystem. Since it is already in HDFS, it should be available to tasks. Any considerations?
