postwait

license LICENSE license=Apache2
group gid=98 groupname=riak
user ftpuser=false gcos-field="Riak Server" group=riak login-shell=/usr/bin/bash password=NP uid=98 username=riak home-dir=/opt/riak/etc
<transform dir path=opt/riak/data.* -> set owner riak>
<transform dir path=opt/riak/data.* -> set group riak>
<transform dir path=opt/riak/log.* -> set owner riak>
<transform dir path=opt/riak/log.* -> set group riak>
<transform dir path=opt/riak/etc -> set owner riak>
<transform dir path=opt/riak/etc -> set group riak>
<transform file path=opt/riak/etc/.* -> set owner riak>

reiddraper

I've been playing more with this Erlang factoring technique. As an exercise, I've been trying to force myself to adopt the method, by writing functions that are 3 or less lines long (function clauses actually, so multiple pattern-matched claues are OK).

Death to receive expressions

One place I noticed was causing myself

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

ferd

%%% Run with 'escript app_deps.erl'
%%% Change the path in filelib:wildcard/1 as required to capture all
%%% your dependencies.
%%%
%%% Rectangular nodes will represent library apps (no processes involved)
%%% and the circular nodes will represent regular apps. An arrow going from
%%% 'A -> B' means 'A depends on B'.
%%%
%%% This script depends on graphviz being present on the system.
-module(app_deps).

serby

projdel node
projadd -c "node settings" -U admin -G staff -K "process.max-file-descriptor=(basic,65535,deny)" node


svccfg -s node-nodestack-service setprop 'method_context/project=node'
svcadm disable node-nodestack-service
svcadm enable node-nodestack-service

pgrep node

amitchhajer

git ls-files -z | xargs -0n1 git blame -w | perl -n -e '/^.*\((.*?)\s*[\d]{4}/; print $1,"\n"' | sort -f | uniq -c | sort -n

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>

kevsmith

-module(bench).

-export([run_suite/3, run/1]).

run_suite(Name, Passes, Messages) ->
    Results = run_suite1(Passes, Messages, []),
    Avg = lists:sum(Results) / Passes,
    StdDev = math:sqrt(lists:sum([math:pow(X - Avg, 2) || X <- Results]) / Passes),
    Summary = [{avg, Avg}, {stddev, StdDev}, {min, lists:min(Results)},
               {max, lists:max(Results)}],

slfritchie

Purpose: To prevent scheduler collapse by disabling scheduler sleep periods.
This patch is relative to R16B01 pre-release but may be applied (with "fuzz")
on R15B01 and R15B03-1 without difficulty.

The new flag, "+zdss", must be used with "+scl false" flag to be successful.
See the erl.xml document for a description.  Example use:

  erl +scl false +zdss 500:500

Note that this flag used to be called "+zdnfgtse"

superjamie

The 8-Byte Two-Step Redux

This post has migrated to:

https://superjamie.github.io/2014/09/21/the-8-byte-two-step-redux