alexdean

These are some user stories I scraped together to help guide the rewrite of ganglia's web application.

Overview
========
Most of the time, I want to just quickly have a look at the overall status of our systems, and verify that everything is 
running smoothly.  I tend to browse around the app, not necessarily looking for anything specific.  I just want to be able 
to see that everything looks 'normal'.  If we receive a problem report (usually something vague like 'the web site is slow'), 
ganglia is often the first place I look for any sign of trouble.

Here, I find the most value in being able to visualize lots of data at once, and in being able to quickly navigate from 

alexdean

{
  "view_name": "routers",
  "items": [
    {
      "vertical_label": "Percent",
      "title": "Routers CPU",
      "metric_regex": [
        {
          "regex": "cpu_(system|user)"
        }

alexdean

    // https://github.com/ganglia/ganglia-web/blob/master/templates/default/header.tpl#L129
    function setStartAndEnd(startTime, endTime) {
      // we're getting local start/end times.
console.log('start', new Date(startTime*1000), 'end', new Date(endTime*1000));

        var local_offset = new Date().getTimezoneOffset() * 60;
console.log('local_offset', local_offset);
console.log('server_utc_offset', server_utc_offset);

        var delta = -server_utc_offset - local_offset;

alexdean

# python manage.py syncdb
Traceback (most recent call last):
  File "manage.py", line 11, in ?
    execute_manager(settings)
  File "/usr/lib/python2.4/site-packages/django/core/management/__init__.py", line 438, in execute_manager
    utility.execute()
  File "/usr/lib/python2.4/site-packages/django/core/management/__init__.py", line 379, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/usr/lib/python2.4/site-packages/django/core/management/__init__.py", line 261, in fetch_command
    klass = load_command_class(app_name, subcommand)

alexdean

$ which god
/bin/god

alexdean

worker_processes 1;

user nobody nogroup;
pid /var/run/nginx.pid;
error_log /var/log/nginx/error.log;

events {
    worker_connections 64;
}

alexdean

# TOTALLY UNTESTED. Just a sketch.

module BatchAccumulator

  def batch_initialize(options={})
    if ! self.class.method_defined?(:flush)
      raise ArgumentError, "Any class including BatchAccumulator must define a flush() method."
    end

    @batch_events ||= 50

alexdean

require 'optparse'

$verbose = false
options = {
  :file => nil,
  :dir => '.'
}

optparse = OptionParser.new do|opts|
  opts.banner = <<-EOF

alexdean

require 'ruby-processing'

# ruby port of http://www.ricardmarxer.com/fisica/examples/ContactResize/applet/ContactResize.pde

class TalkPileApp < Processing::App

  load_libraries :fisica
  java_import "fisica.Fisica"
  java_import "fisica.FWorld"
  java_import "fisica.FDrawable"

alexdean

$ rvm use system
$ rp5 run test_sketch.rb 
RUBY_VERSION: 1.9.3
RUBY_PLATFORM: java
JRUBY_VERSION: 1.7.3
JRUBY_REVISION: dac429b

FDrawable stroke methods ==========
[]