al3xandru

## Day 1 - Track 1  ##

00:10:00 Pat Helland: Keystone - Between a ROC and a SOFT place
01:12:18 Lindsey Kuper: LVars: Lattice-based Data Structures for Deterministic Parallelism
02:11:54 Eric Redmond: Yokozuna!
04:10:50 Justin Shoffstall & Charlie Voiselle: The Seven-Layer Burrito; Troubleshooting a Distributed Database in Production
05:11:00 Peter Bailis: Bad as I wanna be - Coordination and Consistency in Distributed Databases
06:13:24 Joseph Blomstedt: Bringing Consistency to Riak (Part 2) 
07:16:22 Lightning talks (_nb_: you **must** see @tsantero!)

lenary

bind-key -temacs-copy c copy-selection
bind-key -temacs-copy x copy-pipe "reattach-to-user-namespace /usr/bin/pbcopy"
bind-key -temacs-copy z copy-pipe "mate"

etrepum

TL;DR: gproc probably isn't what you need, but OTP's global module will probably work fine.

gproc [1][1] has a module gproc_dist that uses gen_leader [2][2] for coordination, no mnesia is involved. Some of the details for how it was originally designed are in Ulf's paper on it [3][3].

The significant disadvantages are:

• The node list by default must be static and known at start time! This will make expanding the cluster a non-starter without changes to gproc and/or gen_leader. There appears to be some experimental/undocumented way to expand a cluster that might work [4][4]
• There might be incorrect logic for net-splits (either detection or resolution) [5][5]

There doesn't appear to be a better global process registry available. The only other one I was able to find easily was ngproc [6][6] which suffers from the same sort of limitations and doesn't seem to be actively maintained.

darthdeus

Rollback a transaction when user exits a route

I just stubmled upon an issue in my app where a user can go to edit his profile, but instead of saving the form he just leaves to another page where he can post a status (User has many Statuses).

But to make sure that he's just posting a status and not committing something else I want to put that status into a separate transaction

createStatus: function() {
  var transaction = this.get("store").transaction(),
      text = this.get("text"),

vinoski

When you build Erlang/OTP on OS X, it unfortunately defaults to handling a maximum of 1024 file descriptors. You can get around this limitation with the right combination of configuration options and manual changes to a generated config file.

First, go into your unpacked Erlang/OTP source directory and run the following command, replacing the value 10000 with whatever value you want for max file descriptors:

perl -i -pe 's/(define\s+FD_SETSIZE\s+)\d+/\1 10000/' erts/config.h.in 

Next, when you run configure in your Erlang/OTP source directory, be sure to include the right CFLAGS setting, as shown below:

CFLAGS='-DREDEFINE_FD_SETSIZE -DFD_SETSIZE=15000 -D_DARWIN_UNLIMITED_SELECT' ./configure --enable-kernel-poll <other options>

sureshsaggar

# Directory:
# root@localhost:~/flume/apache-flume-1.4.0-SNAPSHOT

# Usage:
# bin/flume-ng agent --conf ./conf/ -f conf/flume-agents-tests.conf -Dflume.root.logger=DEBUG,console -n agent_test_exec_TO_hdfs

# ------------------------------------------------------------------------------------
# This workflow applies to some WebServer running flume agent and dumping data
# back in HDFS. Here /tmp/ping.txt could be any log file.
# ------------------------------------------------------------------------------------

mistersourcerer

#!/bin/bash
#http://pygments.org/docs/cmdline/

LANG="ruby"

if [ -n "$2" ]
  then
    LANG=$2;
fi

lynaghk

I 'm fleshing out some of these ideas here: https://github.com/lynaghk/todoFRP/tree/master/todo/angular-cljs

fmw

(defproject vix "1.0.0-SNAPSHOT"
  :description "Vix is a document repository and management system."
  :dependencies [[org.clojure/clojure "1.4.0"]
                 [org.clojure/data.codec "0.1.0"]
                 [org.clojure/data.json "0.1.2"]
                 [org.clojure/algo.generic "0.1.0"]
                 [slingshot "0.10.3"]
                 [org.mindrot/jbcrypt "0.3m"]
                 [compojure "1.1.0"]
                 [ring/ring-core "1.1.1"]

reiddraper

on the guest SmartOS VM

pkg_add http://pkgsrc.joyent.com/sdc6/2012Q1/i386/All/smtools
# note this is going to shut down the VM
sm-prepare-image

on the global zone