Hi Stack, Thanks for the response, I am trying to maintain an hourly count of messages between two keys/entities: Sender->recipient E.g. a->b
There are multiple ways of modelling this, but one that seems to fit nicely is: Row key = a Col = b Timestamp/version= e.g hour-of-day or hour-of-epoch Val = count of messages This approach utilizes the three dimensions of rowkey, col & version nicely. I will never need to look messages up by recipient but will be frequently querying for all recipients contacted by a sender (ie. return the value(count) for each column (recipient) for a specific rowkey (sender) during a particular timespan - ie. at version x) Everything is in place for this to work except the ability to increment a specific version of a cell per the above. If I don’t keep count (increment) and just write a flag to represent a message between the two, this scheme/approach scales really nicely with the put version of addColumn If there’s a better pattern/approach, I’d really appreciate a pointer in the right direction -Alex. > On Dec 18, 2017, at 8:49 AM, Stack <[email protected]> wrote: > > Hello Alex. We don't have such an ability. Can you say what the use case is > because I at least am having trouble understanding why you would want to do > such a thing. > > Thank you, > S > >> On Wed, Dec 13, 2017 at 2:07 PM, Alex Loffler <[email protected]> wrote: >> >> Hi Folks, >> >> I am using the HBase’s timestamp/version concept to track >> aggregates/counts for time periods/spans. >> >> The put function allows me to update a specific version, ie. >> put(rk).addColumn(cf, column, version, value) >> >> But I can’t find a way of incrementing a specific version ie. >> increment(rk).addColumn(cf, column, version, value) doesn’t exist. >> >> I can only find increment(rk).addColumn(cf, column, value) which exhibits >> the default behaviour of taking the latest version of the cell, >> incrementing it’s value and updating the timestamp/version with >> current-timestamp-millis. >> >> What I’d really like is an increment to the value in the specified >> cell/version without the version update. >> >> Am I missing something, is this not possible for some reason in not >> getting, or would it be a good feature request? >> >> Thanks again for a fantastic platform! >> -Alex. >> >> >> >> >>
