Juniper MEDIA FLOW CONTROLLER 2.0.4 -, Руководство администратора

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Media Flow Controller Overview Media Flow Controller Administrator’s Guide
44 How Media Flow Controller Works Copyright © 2010, Juniper Networks, Inc.
A caching structure that starts with RAM and incorporates a flexible hierarchy of cache
devices ensures that objects are placed and migrated across the hierarchies based on
dynamic load characteristics.
Cache tiers are implemented as an extendable framework, making it easy to add new types of
caching devices and origin storage. The caching system is agnostic to the delivery protocol,
allowing multiple delivery protocols to share the cached content. See
Figure 1 .
Figure 1 Juniper Networks Media Flow Controller Operations (reverse proxy deployment)
Figure 1 illustrates the relations between Media Flow Controller and other network
components in the media delivery optimization operation.
1. Requests come in from the Internet via HTTP, to (typically) an Ethernet switch or Load
Balancer that redirects the request to Media Flow Controller. Media Flow Controller does
certain basic checks, such as URL validation, and parses the URL query string, and
header fields to identify the content and any associated policies. Media Flow Controller
Switch
1
2
User
User User
Origin library
Load Balancer (optional)
Media Flow Controller 1
Media Flow Controller 2
(optional)
NFS
Internal
Network
Eth0 HTTP (8080) LO HTTP (80)
Internet
Gigabit Ethernet
traffic ports
3
Management station
Internal
Network
Management VLAN
VXA Series
Media Flow Engine
VXA Series
Media Flow Engine
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