WordPress conf slides

1. Scaling & High End
Hosting for
WordPress
By Liz Quilty

2. There is no single solution

3. Work out what You Want and
Need!

4. Lots of articles exist already, read them!
Plug-ins
• WP-Sentinel
• WordPress Sentinel (they are different!)
Permissions
Version Control - CVS, SVN, Git
Backups!
Security

5. Set Apache to ignore .svn .git .cvs, etc
Ignore files
• wp-config.php
• wp-content/uploads/
• wp-local-config.php
capistrano for deploy
Develop/test on local or Dev machine
Version Control System

6. • NGINX + phpFCGI ?
• Varnish + apache + mod_php
• PHP-APC
• WP-Supercache/W3-total-cache
• Batcache / Memcached
• Enable the WordPress Object Cache
define(ENABLE_CACHE, true);
Watch for PHP-CGI/FCGI memory usage!
Scaling Single server

7. Videos - Youtube,Vimo
Files - CDN, Flickr, DropBox, S3
Comments - IntenseDebate, Discus
These help save disk & IO, resources
Take Media Offsite

8. Cost
Space
Redundancy
Control - or lack of it
Openstack
Cloudmin
Control Panels? What Control Panels!
The Cloud?

9. Same as Single .. plus more
DNS Round Robin ?
Heartbeat IP Failover ?
Separate DB server w/ Replication ?
File replication ?
Controlling multiple servers ?
Multiple Layouts - Planning is key!
Scaling Multiple

12. Database:
• Mysql Master/Master replication
• Mysql Master/Slave
• Separate DB server(s)
• HyperDB Plugin
DB Replication

13. • Unisen
• rsync
• bitpocket
• DRBD
• Rsync
• Gluster
Replication of Files

14. CFEngine
Puppet
ClusterSSH
#!/bin/bash
HOSTS="machine1 machine2 machine3 machine4";
if [ $1 ];then
for i in $HOSTS; do ssh $i "$@"; done
fi
Controlling servers

15. 10 Plan
20 Test
30 Adapt
40 Goto 20
Implement
Don't wait until you have a problem to test it!
Monitoring - NewRelic, Nagios, etc
Failover Plans, like Heartbeat, DNS, etc
Have a Plan, test it

16. Backup! Backup! Backup!
Multiple Sites for redundancy
Documentation in case developer/admin
disappears
Things to remember

17. Questions?
Questions?

18. http://www.freesoftwaremagazine.com/articles/easy_file_sync_bitpocket