Also an input split size thing in there as well. But definitely # of mappers are proportional to input data size
Sent from my mobile. Please excuse the typos. On 2011-05-01, at 11:26 AM, ShengChang Gu <[email protected]> wrote: > If I'm not mistaken,then the map slots = input data size / block size. > > 2011/5/2 Guy Doulberg <[email protected]> > >> Hey, >> Maybe someone can give an idea where to look for the bug... >> >> I have a cluster with 270 slots for mappers, >> And a fairSchedualer configured for it.... >> >> Sometimes this cluster allocates only 80 or 50 slots to the entire cluster. >> Most of the time the most of slots are allocated . >> >> I noticed that there are special several jobs that cause the above >> behavior, >> >> Thanks Guy, >> >> >> > > > -- > 阿昌
