View
167
Download
0
Category
Preview:
DESCRIPTION
The presentation describe important aspects of implmenting CDN. It was presented in MoovingON conference on June 10, 2014 "Best Practices in SaaS Operation"
Citation preview
CDNשיקולים בשימוש GLOBALDOTS.COM
WHAT IS A CDN?
GLOBAL WEB SITE
End users
Servers
WEB SITE WITH CDN
CDN does• Decrease Latency
• Stop server sprawl
• Increase security
• Price
• Performance
• Features
Which CDN?
Traffic
Dumb Smart
Engagement
Low High
Content
Static Dynamic
Smart Traffic• Modify content on the edge
• Conditions and rules
• Content based load balancing
Dynamic content• Really dynamic?
• Network optimization
• Application integration
High engagement• Application integration
• Build integration
• Use built-in reporting
Application integration
examples
ESI - Edge Side Include• Moves assembly of the web page from the
web server to the Edge server
• Allows easy caching of web page parts
• Can significantly increase caching rates and
lower origin load
Example without ESI<?php
require(‘user-header.php');
require('left-body.php');
require(‘user-body.php');
require('footer.php');
?>
• This happens on the Origin• The result changes for every user and is non-cacheable
Example using ESI<html>
<esi:include src="http://example.com/user-header.php?u=xyz" />
<esi:include src="http://example.com/left-body.php" />
<esi:include src="http://example.com/user-body.php?u=xyz" />
<esi:include src="http://example.com/footer.php" />
</html>
• This happens on the Edge
• Left-body and footer are cacheable
Deploying CDN
Most Important
Use CDN experts
www.globaldots.com
Language• POP
• CHR
• Edge
• Shield
• TTL
• Downstream / Upstream
Application• Whole web site Static assets
• IP address
• Application purging
• Split static from dynamic content
Infrastructure• Check Load balancers
• Origin failover
• CDN failover – Multi CDN?
Monitoring• Access logs
• CDN availability
Recommended