rantav

require 'speaker'
require 'israel'

module Israel
  module Summit
    def call_for_papers(speaker, subject)
      apply(spekaer) if ["DevOps, NoOps, Continuous Deployment, Dev Culture", 
                         "Software Craftsmanship", 
                         "Mobile dev",
                         "Web dev",

rantav

$ ps aux | grep chef
ubuntu    6122  0.0  0.0   7800   636 pts/3    S+   12:24   0:00 grep --color=auto chef
root      8819  0.1  2.7 137336 47132 ?        Sl   Oct18  10:54 /opt/chef/embedded/bin/ruby /usr/bin/chef-client -d -P /var/run/chef/client.pid -L /var/log/chef/client.log -c /etc/chef/client.rb -i 1800 -s 20
chef     16025  0.2  7.4 649552 127244 ?       Sl   Sep19 101:34 java -Xmx256M -Xms256M -Dsolr.data.dir=/var/lib/chef/solr/data -Dsolr.solr.home=/var/lib/chef/solr/home -jar /var/lib/chef/solr/jetty/start.jar
chef     16084  0.5  4.3 186180 74012 ?        Sl   Sep19 282:09 merb : chef-server (api) : worker (port 4000)                                                                                                                            
chef     16152  0.5  3.2 141916 54408 ?        Sl   Sep19 259:50 merb : chef-server-webui : worker (port 4040)        
$ ps aux | grep couch
ubuntu    6124  0.0  0.0   7800   640 pts/3    S+   12:25   0:00 grep --color=auto couch
couchdb   7466  0.0  0.0   4220

rantav

{ robot: 
     { name: 'bot',
       brain: [Object],
       alias: false,
       adapter: [Object],
       commands: [Object],
       Response: [Function: Response],
       listeners: [Circular],
       loadPaths: [Object],
       enableSlash: undefined,

rantav

[119832.732086] BUG: unable to handle kernel NULL pointer dereference at 0000000000000038
[119832.732111] IP: [<ffffffff81053527>] pick_next_task_fair+0xa7/0x1a0
[119832.732124] PGD 1cee6f067 PUD 1cd5e7067 PMD 0 
[119832.732132] Oops: 0000 [#1] SMP 
[119832.732137] last sysfs file: /sys/devices/system/cpu/cpu1/cache/index2/shared_cpu_map
[119832.732145] CPU 1 
[119832.732147] Modules linked in: acpiphp raid456 async_pq async_xor xor async_memcpy async_raid6_recov raid10 raid6_pq async_tx raid1 raid0 multipath linear
[119832.732172] 
[119832.732177] Pid: 7896, comm: chef-client Not tainted 2.6.38-8-virtual #42-Ubuntu  
[119832.732186] RIP: e030:[<ffffffff81053527>]  [<ffffffff81053527>] pick_next_task_fair+0xa7/0x1a0

rantav

require 'speaker'
require 'israel'

module Israel
  module DevOps
    def call_for_papers(speaker, subject)
      # Speakers should apply for the call for papers if they have talks on the subjects of Continuous Deployment of DevOps tooling
      # Assuming they are available Jan 13.
      apply(spekaer) if ["Continuous Deployment Case Studies", "DevOps tools"].include(subject) and speaker.available?(Date.new(2013,1,13))
    end

rantav

When using newrelic in java, it isn't obvious how to mavenize things. Newrelic has two java jars: newrelic.jar and newrelic-api.jar. There's also another newrelic.yaml of course. For development you need the api.jar in your classpath. In production you want the api jar in the classpath, but also newrelic.jar as an agent. Newrelic have a good explanation about how to set up newrelic.jar as an agent but they don't have anything regarding how to develop and get the api jar in place using maven, so here goes...

Add the repository:

<repositories>
  <repository>
    <id>newrelic</id>

newrelic

rantav

// Old style mongodb group and a bit more of javascript to complete the task (Array.sort and Array.slice)
db.Session.group({
  key: {user: true}, 
  cond: {
    serviceId: '888', 
    end: {$gte: ISODate('2012-08-30T00:00:00Z'), $lte: ISODate('2012-08-31T00:00:00Z')}, 
    start: {$lte: ISODate('2012-08-31T00:00:00Z')}
  }, 
  initial: {durationSeconds: 0}, 
  reduce: function(obj, prev) {prev.durationSeconds += obj.durationSeconds;}

rantav

A few show tricks to find slow queries in mongodb

Enable profiling

First, you have to enable profiling

> db.setProfilingLevel(1)

Now let it run for a while. It collects the slow queries ( > 100ms) into a capped collections, so queries go in and if it's full, old queries go out, so don't be surprised that it's a moving target...

rantav

In mongodb it's easy to make at upsert, meaning update-or-insert by calling

db.collection.update({criteria}, {updated fields}, true)

The third parameter means - insert a new document if the document doesn't exist yet. So, for example, the following will insert a new document for the user if there's no document for that user yet, and will update it if it already exists:

 db.users.update({user_id: '1234'}, {user_id: '1234', name: 'Ran'}, true)

rantav

#import <UIKit/UIKit.h>
#import "AQGridViewCell.h"

@interface SpringBoardIconCell : AQGridViewCell
{
    UIImageView * _iconView;
  UILabel* indexLabel;
}

- (id) initWithFrame:(CGRect)frame reuseIdentifier:(NSString*)reuseIdentifier;