1) when server runs the session with aggregate transformation it stores data in memory until it completes the aggregation when u partition a source the server creates one memory cache and one disk cache for each partition .it routes the data from one partition to another based on group key values of the transformation
2) It is place where all the rows entering the Aggregator Transformation will be placed till the aggregate calculations like sum,Avg are made.
all the group information will be stored in index files and row data in data cache.
3) when server runs the session with aggregate transformation it stores data in memory until it completes the aggregation when u partition a source the server creates one memory cache and one disk cache for each partition .it routes the data from one partition to another based on group key values of the transformation
2) It is place where all the rows entering the Aggregator Transformation will be placed till the aggregate calculations like sum,Avg are made.
all the group information will be stored in index files and row data in data cache.
3) when server runs the session with aggregate transformation it stores data in memory until it completes the aggregation when u partition a source the server creates one memory cache and one disk cache for each partition .it routes the data from one partition to another based on group key values of the transformation
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