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Building a Real-Time App with Phoenix
More and more, users are coming to expect real-time features from the web apps they use. Whether it's a chat, a live game, a shared document or a push notification, we as developers are finding ourselves needing to go beyond standard HTTP requests to support real-time functionality. Phoenix, the web framework for Elixir, has real-time capability out of the box. It's fast, highly concurrent (thanks to the Erlang VM), fault-tolerant and super friendly towards distributed systems.</bloc...
phoenix  channel  real  time  web  socket  stream  5* 
february 2019 by ianweatherhogg
Serving Erlang
Since OTP is such a powerful tool for creating servers, not surprising, I’m constantly installing Erlang on new hardware & virtualware.
ubuntu  erlang  installation  local  time 
july 2018 by ianweatherhogg
Gradient Trader Part 0: Building a Cryptocurrency Trading Bot
########### Disclaimer: I have moved the entire market data collection stack to Rust. Everything in this post still works.
bitcoin  trading  broker  strategy  type  script  rust  python  order  book  time  series  data  base 
february 2018 by ianweatherhogg
Inside Real-Time Linux | | The source for Linux information
Real-time Linux (RTL), a form of mainline Linux enabled with PREEMPT_RT, has come a long way in the past decade. Some 80 percent of the deterministic PREEMPT_RT patch is now available in the mainline kernel itself. Yet, backers of the strongest alternative to the single-kernel RTL on Linux -- the dual-kernel Xenomai -- continue to claim a vast superiority in reduced latency.
linux  real  time  kernel 
february 2017 by ianweatherhogg
Advanced Time Series Plots in Python — BLACKARBS LLC
1. Motivation
2. Get Data
3. Default Plot with Recession Shading
4. Add Chart Titles, Axis Labels, Fancy Legend, Horizontal Line
5. Format X and Y Axis Tick Labels
6. Change Font and Add Data Markers
7. Add Annotations
8. Add Logo/Watermarks
python  time  series  trading 
january 2017 by ianweatherhogg
Seasonal ARIMA with Python
Just a few posts to share my work as a data scientist with you.
time  series  python  ipython 
december 2016 by ianweatherhogg
Time Series Analysis (TSA) in Python - Linear Models to GARCH — BLACKARBS LLC
Post Outline
* Motivation
* The Basics
o Stationarity
o Serial Correlation (Autocorrelation)
o Why do we care about Serial Correlation?
* White Noise and Random Walks
* Linear Models
* Log-Linear Models
* Autoregressive Models - AR(p)
* Moving Average Models - MA(q)
* Autoregressive Moving Average Models - ARMA(p, q)
* Autoregressive Integrated Moving Average Models - ARIMA(p, d, q)
* Autoregressive Conditionally H...
python  time  series  statistics  probability  5* 
december 2016 by ianweatherhogg
Intel Open Sources Arduino 101 Real Time OS
Arduino announced that Intel has released Arduino 101 real time operating system (RTOS) for hacking and studying purpose.
arduino  real  time  operating  system 
june 2016 by ianweatherhogg
Creating simple realtime app with Celery, CherryPy and MongoDb
In this post I’d like to create demo realtime Stack Overflow mirror with Celery, CherryPyand MongoDB. By realtime I mean that app will fetch resultsfrom remo...
celery  python  rss  data  mongo  parser  javascript  real  time  stack  overflow 
april 2016 by ianweatherhogg
Building real-time dashboard applications with Apache Flink, Elasticsearch, and Kibana | Elastic
This blog post shows how to build a real-time dashboard solution for stream data analytics using Apache Flink, Elasticsearch, and Kibana.
elastic  search  flink  kibana  real  time  series  stream  processing 
february 2016 by ianweatherhogg
An Introduction to APIs - Zapier
Zapier makes it easy to automate tasks between web apps.
api  mashup  design  authentication  real  time 
january 2016 by ianweatherhogg
Creating Time-lapse Videos on Ubuntu | blog
I've previously blogged about how I sometimes setup a webcam to take pictures and turn them into videos. I thought I'd update that here with something new I've
video  animation  time 
december 2015 by ianweatherhogg
Understanding Spray Client Timeout Settings
Kamon is a set of tools that will help you monitor your reactive applications
spray  time  client 
november 2015 by ianweatherhogg
Rotate GNOME 3's wallpaper with systemd user units and timers -
Systemd unit files and timers at the user level can rotate your GNOME wallpaper really easily.
systemd  time 
september 2015 by ianweatherhogg
How to use systemd timers | Sean McGary
Having started to switch over to Fedora recently (as well as CoreOS), I needed to figure out how to run jobs at certain times and/or intervals. On an OS like Ubuntu this is accomplished using Cron. Cron is the worlds largest pain in the ass, that is at least in comparison to how easy it is to create timers under Systemd.
systemd  time 
august 2015 by ianweatherhogg
Colossus IO Framework: Built at Tumblr
scala  micro  service  akka  event  processing  real  time  metric  rx 
july 2015 by ianweatherhogg
Programming Akka’s Finite State Machines in Scala | Adventures in HttpContext
Over the past few months my team has been building a new suite of services using Scala and Akka. An interesting aspect of Akka we leverage is its Finite State
akka  finite  state  machine  time  scala 
february 2015 by ianweatherhogg
What Does an Idle CPU Do? - Gustavo Duarte
In the last post I said the fundamental axiom of OS behavior is that at any
given time, exactly one and only one task is active on a CPU. But if …
linux  kernel  cpu  scheduler  5*  c  time 
december 2014 by ianweatherhogg
When Does Your OS Run? - Gustavo Duarte
Here’s a question: in the time it takes you to read this sentence, has your OS
been running? Or was it only your browser? Or were they perhaps …
operating  system  cpu  time  kernel  linux  network  io  5* 
december 2014 by ianweatherhogg
Forecasting Financial Time Series - Part I - QuantStart
Using logistic regression, linear discriminant analysis and quadratic discriminant analysis with the scikit-learn Python library to predict the S&P500 direction
quant  time  series  scikitlearn  predictive  learn  python 
november 2014 by ianweatherhogg
Blog Archive - Eugene Zhulenev
Blog Archive 2014 Building Twitter Live Stream Analytics With Spark and Cassandra
Nov 20 2014 posted in cassandra, finance, scala, spark, spark- …
blogs  spark  real  time  data  analytics  trading  twitter  cassandra  akka  finagle  scalaz  stream  processing  5* 
november 2014 by ianweatherhogg
GoRealtimeWeb - Examples how to write realtime web applications in Golang
go  real  time  web  socket 
july 2014 by ianweatherhogg
GoShare's Philosophy · abhishekkr/goshare Wiki
goshare - Go Share your TimeSeries/NameSpace/KeyVal DataStore (using leveldb) over HTTP &/or ZeroMQ
go  time  series 
june 2014 by ianweatherhogg
cl-one-time-passwords - One time passwords (hotp rfc4226, totp rfc6238) as used in two factor authentication systems such as Google's.
one  time  password  github  lisp  google  authentication 
june 2014 by ianweatherhogg
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