Stream processing and reactive programming

Functional reactive programming
- Javascript
- Python
Streaming data analysis
To read
References

Lazy bookmark for practical details to processing and transforming possibly-infinite streams of data, from signals to parse trees. Disambiguating “transducers”.

Used in parallel/offline processing of large data sets that do not fit in core, or processing things that happen in realtime such as UI.

I am imagining more general objects than singly-indexed real-valued signals; Tokens, maybe. Classic DSP can be elsewhere. Infrastructure to do stream processing in a distributed fashion is filed under message queues.

In statistics and machine learning, stream processing connects with online learning; incorporating data as it comes in, as in distributed statistics.

Functional reactive programming

Closely related: Communicating Sequential Processes. I think the main difference is supposed to be perhaps that CSP is not necessarily in a function style? But in practice, FRP I have seen in the wild is not necessarily in a functional style?

Question: why are there not more visual pipeline programs for this programming domain? It looks like an obvious fit.

A parallelism/streaming thing. Communicating Sequential Processes. Functional Reactive Programming.

CSP and transducers — I don’t think these are transducers as I understand them, i.e. stack machines, but I could be wrong. See also the expositions from the clojure authors:
- Anatomy of a reducer
- transducers are coming
ReactiveX is a particular stream processing paradigm with implementations for many languages
Reactive manifesto:
We believe that a coherent approach to systems architecture is needed, and we believe that all necessary aspects are already recognized individually: we want systems that are Responsive, Resilient, Elastic and Message Driven. We call these Reactive Systems.
Systems built as Reactive Systems are more flexible, loosely-coupled and scalable. This makes them easier to develop and amenable to change. They are significantly more tolerant of failure and when failure does occur they meet it with elegance rather than disaster. Reactive Systems are highly responsive, giving users effective interactive feedback.
A collection of links for streaming algorithms and data structures

Javascript

See FRP in Javascript.

Python

See Python See FRP in Python.

DIY python coroutine decorators:

Streaming data analysis

Online, possibly realtime, certainly memory-constrained.

Apache Storm…
- Storm-compatible, Heron aims to be Storm-but-more-reliable.

To read

Adrian Colyer explains the McSherry et al Naiad system
A different, information-theoretic, angle — The (interstellar) streaming problem:
- Streaming Algorithms
- Jeremy Kun: The complexity of Communication

References

Hu, Tao, Cengiz Pehlevan, and Dmitri B. Chklovskii. 2014. “A Hebbian/Anti-Hebbian Network for Online Sparse Dictionary Learning Derived from Symmetric Matrix Factorization.” In 2014 48th Asilomar Conference on Signals, Systems and Computers.

McSherry, Frank D., Rebecca Isaacs, Michael A. Isard, and Derek G. Murray. 2013. Differential dataflow. US20130304744 A1, filed May 10, 2012, and issued November 14, 2013.

Murray, Derek G., Frank McSherry, Rebecca Isaacs, Michael Isard, Paul Barham, and Martín Abadi. 2013. “Naiad: A Timely Dataflow System.” In Proceedings of the Twenty-Fourth ACM Symposium on Operating Systems Principles, 439–55. SOSP ’13. New York, NY, USA: ACM.

Pan, Gang, Wangsheng Zhang, Zhaohui Wu, and Shijian Li. 2014. “Online Community Detection for Large Complex Networks.” PLoS ONE 9 (7): e102799.

Ryabko, Daniil, and Boris Ryabko. 2010. “Nonparametric Statistical Inference for Ergodic Processes.” IEEE Transactions on Information Theory 56 (3): 1430–35.

Sorensen, Andrew, and Henry Gardner. 2010. “Programming with Time: Cyber-Physical Programming with Impromptu.” In ACM Sigplan Notices, 45:822. ACM Press.