That's incorrect. Backpressure works when spooling is enabled (which is default). It's not handled only when you turn spooling off explicitly.
On Sun, Jan 31, 2016 at 3:50 PM, Sandesh Hegde <sand...@datatorrent.com> wrote: > According to Vlad, disabling the spooling will crash the buffer server > after it runs out of memory. > > It means Apex doesn't have a mechanism to handle backpressure yet. > > On Fri, Jan 29, 2016 at 9:34 AM Pramod Immaneni <pra...@datatorrent.com> > wrote: > >> By default buffer spooling is enabled so data gets spooled to file system >> once the buffer limits are reached, there will be some slow down but >> upstream will continue to process, if buffer spooling is disabled then when >> the buffers are filled the sender is blocked and this back pressure will >> propagate upstream to the first operator. >> >> On Fri, Jan 29, 2016 at 7:47 AM, Sandesh Hegde <sand...@datatorrent.com> >> wrote: >> >>> Hello Team, >>> >>> My understanding of the backpressure in Apex is, Buffer server will slow >>> down ( because of TCP/IP congestion control ) the upstream operator if the >>> downstream is slow. Is there more to it? >>> I don't see this topic covered in docs. >>> >>> Thanks >>> Sandesh >>> >>> >>> >>> >>
