On 10-12-01 8:07 AM, Manik Surtani wrote:

No, in terms of which tasks are executed 'locally' and which tasks are executed 'remotely'.

E.g., there are concievably 3 types of tasks:

1) Tasks that are data intensive, that should be executed on a remote node, close to the actual data
2) Aggregation of results of these data intensive tasks, which should happen on remote nodes as well, before transmitting any results back to the caller
3) Aggregation of several results on the caller.

Now each of these tasks can be chained - I think there definitely is value in that.

Their specifics are determined as they are added to "coordinated task", I am sure we can tune this to requirements we need.

CacheManager cm = ...;
CoordinatedTask task = cm.newCoordinatedTask("finalOutcomeCacheName");
cm.addLocalTask(new GridFileQuery("my_gridfs"));          // Fetch
cm.addLocalTask(new GridFileSizeCounter());               // Map
cm.addGlobalTask(new IntegerSummarizer("my_gridfs_size"); // Reduce