1. optimize, reduce & cache
Improving Page Speed
With Open Source Tools
March 2010
by Ralf Schwoebel, CEO
www.tradebit.com

2. Who is Ralf?
• Started one of the first online Shopping Malls
in Germany 1995
• Got into SEO in 2002
• Started tradebit.com in 2005 as Tradebit, Inc.
• Today: more than 20,000 digital good sellers
• Answering more than 5 mio. web requests
daily
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3. Focus on speed when SEO is done
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4. What makes it slow
Your
Provider
Your
Your … ……
Potential
Cool Site.com …………..
Buyer
……….
code (1) The distance of your buyer to the server
(2) Your database setup
(3) Your programming logic (PHP, Java, etc.)
(4) Amount of objects per page requested
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5. optimize, reduce and cache
• Optimize: improve database, improve
code, etc.
• Reduce: picture size, objects per page,
distance, etc.
• Cache: have everything ready for the
next request
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6. Using Open Source tools
• Search: Sphinx (or Lucene)
• Cache: Memcache & Squid
• Code: XCache for PHP
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7. Embrace the Squid
• www.squid-cache.org : free proxy for Lin/Win
• Easy to setup, powerful, stable, scalable, fast
images
Your
Wordpress/
vBulletin/
shop
+ javascript = 20+ reqs
.php
css
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8. Divide and conquer!
• Put the statics into cache, lower server load!
Transparent Proxy with Squid
images
Your
Wordpress/
vBulletin/ javascript
etc
.php
css
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9. Go global
• Local delivery from the closed hub
• Load balancing included, also fail-over
squid
squid
Your
page images
.php
javascript
css
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10. How much is it?
• Example calculation with 8 VPS Installations
• Medium VPS: ca. $50 / month = 400US$ / m
Think: „main market and who is far away?“
Hosting: California
4 US Squids in: TX, NY, MI and FL
4 globals in: 1 Europe, 2 Asia, 1 Australia
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11. Config for the admin
http_port 93.189.89.113:80 vhost vport
visible_hostname es.tradebit.com
cache_peer_access p1 allow http
cache_peer 74.55.216.24 parent 80 0 no-query originserver ..
..sourcehash monitorurl=http://p1.tradebit.com/livewatch.php name=p1 login=PASS
#(add more peers for failover)
collapsed_forwarding on
refresh_stale_hit 600 seconds
acl all src 0/0
http_access allow all
cache_mem 256 MB
cache_swap_low 90
cache_swap_high 95
cache_dir ufs /opt/squid 10000 16 256
maximum_object_size 2048 KB
maximum_object_size_in_memory 512 KB
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12. Conclusion
• A fistful of dollars gives you:
– A global content distribution network
– Increased speed = higher conversions
– A security layer between your site and hackers
– A fail-over solution to sleep better
– Less load on your main servers
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13. Thank you!
For questions: puzzler@tradebit.com
Twitter: trabit
Skype: tradebit
Have a great day!
Ralf Schwoebel
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