logstash split message from log4net into two fields -


we new using logstash , parsing log4net messages. in message field have string output 

some random application name - random message

i tried use gsub => ["message", "-", "app name"] changed string , not add new field. best way application name new field , remove message field?

thank in advanced help.

how grok{} pattern:

   %{data:app} - %{greedydata:otherstuff}

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