@hindog wrote: "Nor the browser column" -- What if the "browser" column WAS the primary key?  Would increment be possible in similar fashion to upsert, the difference being that internally Kudu would read the existing value and add it to the increment value before saving?   The other Kudu limitation that this runs into is that row key columns cannot be modified. It would be somewhat easier to implement atomic increments on non-key columns, but then that means doing a lot of updates and it's not something Kudu excels at e.g. it supports modifying data but the higher the rate the slower the reads are. ... View more