The trick? pass the file descriptor from a parent process and have the server.listen reuse that descriptor. So multiprocess in their own memory space (but with ENV shared usually)
It does not balance, it leaves it to the kernel.
In the last nodejs > 0.8 there is a cluster module (functional although marked experimental)
| #!/bin/bash | |
| PUTIO_USERNAME="your put.io username" | |
| PUTIO_PASSWORD="your put.io password" | |
| wget --http-user=${PUTIO_USERNAME} --http-password=${PUTIO_PASSWORD} --content-disposition -c $@ |
| #!/bin/bash | |
| ############################################################################### | |
| # CONFIG | |
| # AWS config | |
| export AWS_SECRET_KEY="XXXX" | |
| export AWS_ACCESS_KEY="XXXX" | |
| export PATH=$PATH:/usr/local/aws/ec2/bin | |
| export EC2_HOME=/usr/local/aws/ec2/ |
| #!/bin/sh | |
| # | |
| # Creates a SmartOS VM in VirtualBox (assuming you alread have VirtualBox installed) | |
| # | |
| # This script will: | |
| # * Download the latest live ISO image of SmartOS | |
| # * Create a VirtualBox VM, or update an existing VM with the latest ISO | |
| # * Configure the VM with a zones disk, and boot it! | |
| # | |
| # |
| net.core.somaxconn = 32768 | |
| net.ipv4.conf.all.send_redirects = 1 | |
| net.ipv4.ip_nonlocal_bind = 1 | |
| net.ipv4.tcp_abort_on_overflow = 0 | |
| net.ipv4.tcp_fin_timeout = 10 | |
| net.ipv4.tcp_keepalive_time = 300 | |
| net.ipv4.tcp_max_orphans = 262144 | |
| net.ipv4.tcp_max_syn_backlog = 16384 | |
| net.ipv4.tcp_max_tw_buckets = 262144 | |
| net.ipv4.tcp_mem = 200000 280000 300000 |
| # | |
| # This config file is a combination of ideas from: | |
| # http://www.37signals.com/svn/posts/1073-nuts-bolts-haproxy | |
| # http://www.igvita.com/2008/05/13/load-balancing-qos-with-haproxy/ | |
| # http://wiki.railsmachine.com/HAProxy | |
| # http://elwoodicious.com/2008/07/15/nginx-haproxy-thin-fastcgi-php5-load-balanced-rails-with-php-support/ | |
| # http://upstream-berlin.com/2008/01/09/using-haproxy-with-multiple-backends-aka-content-switching/ | |
| # http://wiki.railsmachine.com/HAProxy | |
| # http://gist.github.com/raw/25482/d39fb332edf977602c183194a1cf5e9a0b5264f9 | |
| # |
These are only examples, for a few very common actions. You are expected to write your own rules for the rest. The syntax is regular JavaScript, but see the polkit(8) manpage for the object structure and available API. These examples are for polkit versions 106 and later, with the JS interpreter. They won't work with Debian's polkit v105.
If you don't know the action name, either run pkaction and look for anything similar:
pkaction | grep cups
...or try to perform the actual action, cancel it, then look in your system logs:
journalctl -t polkitd -n 10 | grep action
| #!/usr/bin/env python | |
| """ Sends Jenkins build duration statistics to Graphite. """ | |
| import requests | |
| import json | |
| from graphite import Graphite # This is our closed-source library but you get the idea. | |
| JENKINS_URL='http://jenkins' | |
| GRAPHITE_HOST='10.x.x.x' | |
| GRAPHITE_PREFIX='jenkins.main.build_time.' |
| Latency Comparison Numbers (~2012) | |
| ---------------------------------- | |
| L1 cache reference 0.5 ns | |
| Branch mispredict 5 ns | |
| L2 cache reference 7 ns 14x L1 cache | |
| Mutex lock/unlock 25 ns | |
| Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
| Compress 1K bytes with Zippy 3,000 ns 3 us | |
| Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
| Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |