MongoDB aggregation $out step: store data in another database -

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i'm building new big data project , using mongodb operational database. use pentaho kettle run etl processes , cleans de data.

in step of etl make mongodb aggregation pipeline next operators in order:

{$unwind: '$metrics'}, {$match:{'metrics.event.name': 'hover',           'observationtime':{             $gte:{                  $date:"${data}"             }           }        }      }, { $project : { '_id': 0,                 'remotelocation':1,                  "remoteip":1,                  "language" : 1,                  "observationtime" : 1,                  "device" : 1,                  "session_id" : 1,                  "user_id" : 1,                  "metrics" : 1,               } }, { $out: "hover_tmp"}

my problem query executed on replica database, cannot write there , that's $out in final step.

a posible solution specify collection of non-replica mongodb database.

is posible ? find other solution?


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