On 1/19/10 7:54 PM, "Amareshwari Sri Ramadasu" <[email protected]>
wrote:
> Hi Zhang,
>
> The following parameters are node specific.
> mapred.tasktracker.map.tasks.maximum
> mapred.tasktracker.reduce.tasks.maximum
> tasktracker.http.threads
> dfs.datanode.handler.count
>
> The rest of the parameters are Job-specific.
... Except for the ones that are namenode and jobtracker specific.
:(
Hadoop configuration sucks greatly, and the lack of real documentation on
what parameters exist (it seems like every month there is a "new" hidden
param) and what actually uses them (i.e., where is final actually taking
into account?) doesn't help.
[ and no, *-default.xml and/or "read the source!" is not good enough.]
