Impression discounting for followfeed

A method of providing updates to a user of a connection network application, the method comprising:

• performing, by a second pass ranker, a first query of a first data store to fetch N most recent impressed items viewed by a user of connection network application, wherein the first query comprises a batch query having only a single query key comprising a member identifier of the user;
• concurrently with the first query, performing, by a first pass ranker, a second query of search nodes separate from the first data store to generate a set of top K search node results;
• subsequent to the first query and the second query, filtering, by the first pass ranker, the N most recent impressed items from the set of K search node results to generate a candidate set that is provided to the second pass ranker;
• applying, by the second pass ranker, a freshness factor to the candidate set;
• and
• providing, by the second pass ranker, updates to display to the user of the connection network application based on results of applying the freshness factor.

A system comprising:

• means for performing, by a second pass ranker, a first query of a first data store to fetch N most recent impressed items viewed by a user of a connection network application, wherein the first query comprises a batch query having only a single query key comprising a member identifier of the user;
• means for performing, concurrently with the first query and by a first pass ranker, a second query of search nodes separate from the first data store to generate a set of top K search node results;
• means for filtering, subsequent to the first query and the second query, by the first pass ranker, the N most recent impressed items from the set of K search node results to generate a candidate set that is provided to the second pass ranker;
• means for applying, by the second pass ranker, a freshness factor to the candidate set;
• and
• means for providing, by the second pass ranker, updates to display to the user of the connection network application based on results of application of the freshness factor.