Chapter 8 App and book distribution 72
Caching Server
iOS and OS X make it easy for users to access and consume digital content, and some
users may request many gigabytes of apps, books and software updates while connected
to an organization’s network. The demand for these assets comes in spikes—rst with
initial Apple device deployment, and then sporadically, as users discover new content or as
content is updated over time. These content downloads can cause surges in demand for
Internet bandwidth.
Caching Server is a service of OS X Server that saves previously requested content on your
organization’s local network. This reduces the bandwidth needed to download content. It does
this by reducing outbound Internet bandwidth on private networks (RFC 1918) and storing
cached copies of requested content on the local area network.
Caching Server on OS X Server Yosemite caches the following types of content for iOS 7 or later
and OS X Mountain Lion v10.8.2 or later:
•
iOS software updates (iOS 8.1 or later)
•
OS X software updates
•
Internet Recovery image (OS X Mavericks or later)
•
Java and print driver updates
•
App Store apps
•
App Store updates
•
Books from the iBooks Store
•
iTunes U courses and content
•
GarageBand downloadable content
•
High-quality voices and language dictionaries
For more information about content cached by the caching service, see the Apple Support article
OS X Server: Content types supported by the Caching service.
iTunes also supports Caching Server. The following types of content are supported by iTunes
11.0.4 or later (on both Mac and Windows computers):
•
App Store apps
•
App Store updates
•
Books from the iBooks Store
Large networks benet from having multiple Caching Servers in place. For many deployments,
conguring Caching Server is as simple as turning on the service. With Caching Server on
OS X Server Yosemite, a NAT environment for the server and all devices that use it is no
longer required. Caching Server can now be used on networks consisting of publicly routable
IP addresses. Apple devices running iOS 7 or later and OS X Mountain Lion v10.8.2 or later
automatically contact a nearby Caching Server without any additional conguration.
For more information, see Caching Service in OS X Server Help.
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