Hi Kenn, Thanks for replying. I look forward to the technical docs.
Shen On Fri, Jun 24, 2016 at 2:17 PM, Kenneth Knowles <[email protected]> wrote: > Hi Shen, > > The row refers to the ability for a DoFn in a ParDo to access per-key (and > window) state cells that persist beyond the lifetime of an element or > bundle. This is a feature that was in the later stages of design when the > Beam code was donated. Hence it a row in the graph, but even the Beam Model > column says "no", pending a public design proposal & consensus. Most > runners already have a similar capability at a low level; this feature > refers to exposing it in a nice way for users. > > I have a design doc that I'm busily revising to make sense for the whole > community. I will send the doc to this list and add it to our technical > docs folder as soon as I can get it ready. You can follow BEAM-25 [1] if > you like, too. > > Kenn > > [1] https://issues.apache.org/jira/browse/BEAM-25 > > > On Fri, Jun 24, 2016 at 10:56 AM, Shen Li <[email protected]> wrote: > > > Hi, > > > > There is a "Keyed State" row in the "What is being computed" section of > > the capability matrix. What does the "Keyed State" refer to? Is it a > global > > key-value store? > > > > ( > > > > > http://beam.incubator.apache.org/beam/capability/2016/03/17/capability-matrix.html > > ) > > > > Thanks, > > > > Shen > > >
