Take up your valuable time,thank you very much!
------------------ ???????? ------------------ ??????: "ShaoFeng Shi";<[email protected]>; ????????: 2016??1??31??(??????) ????3:45 ??????: "user"<[email protected]>; ????: Re: cube ???????? for most of the cases, one reducer is okay for merge the distinct values from all dimension columns on fact table; but if there are multiple ultra high cardinality columns, using multiple reducers would gain better concurrency. Actually this is the task I'm doing today, as a part of work for another feature, it will be rollout in a certain release after 2.0 By the way, please try using English for getting wider audience. ?????? Outlook Mobile On Sat, Jan 30, 2016 at 11:02 PM -0800, "??????????" <[email protected]> wrote: ????fact??????????5000??????, ??build cube ????????????(Extact Fact Table Distinct Columns), reduce??????????????1??, ??????????????????????1??, ????????????????????????????,????????????job??????. ????????????????????, ??????????????????mapreduce???????
