Difference between revisions of "Building Helix Server Cluster using LVS"

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== Introduction ==
 
== Introduction ==
  
RealNetworks' streaming service uses the following protocols:
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[http://en.wikipedia.org/wiki/Helix_%28project%29 Helix] is an open source project started by Real Networks to provide audio and media service.
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A single Helix server always has its limitation in performance. Server cluster can be used to scale up the performance of the whole Helix media system and provide redundancy.
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Helix streaming service uses the following protocols:
  
 
* PNM (TCP on port 7070, UDP from server -> player on ports 6970-7170)
 
* PNM (TCP on port 7070, UDP from server -> player on ports 6970-7170)
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* PNM was our original, but now mostly legacy, protocol used in our versions 1 through 5.
 
* PNM was our original, but now mostly legacy, protocol used in our versions 1 through 5.
 
* There's also a HTTP/TCP-only fallback mode which is (usually) on port 8080.
 
* There's also a HTTP/TCP-only fallback mode which is (usually) on port 8080.
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When a media player client is accessing those services, those service might have some affinity. A good [[load balancer]] need to combine those service together as a single load balancing service.
  
 
== Architecture ==
 
== Architecture ==

Latest revision as of 08:16, 8 April 2007

Introduction

Helix is an open source project started by Real Networks to provide audio and media service.

A single Helix server always has its limitation in performance. Server cluster can be used to scale up the performance of the whole Helix media system and provide redundancy.

Helix streaming service uses the following protocols:

  • PNM (TCP on port 7070, UDP from server -> player on ports 6970-7170)
  • RTSP (TCP on port 554, similar UDP as above, but often on multiple ports)
  • PNM was our original, but now mostly legacy, protocol used in our versions 1 through 5.
  • There's also a HTTP/TCP-only fallback mode which is (usually) on port 8080.

When a media player client is accessing those services, those service might have some affinity. A good load balancer need to combine those service together as a single load balancing service.

Architecture

Configuration Example

VS/NAT

VIP/EXT IP 192.168.9.244
GATEWAY IP 192.168.0.1
RS1 192.168.0.150
RS2 192.168.0.160


Run the follwing script on LB Server:

ipvsadm -A -t 192.168.9.244:554  -s rr
ipvsadm -a -t 192.168.9.244:554  -r 192.168.0.150 -m
ipvsadm -a -t 192.168.9.244:554  -r 192.168.0.160 -m

Run

realplay rtsp://192.168.9.244/test.rm

for a test.


VS/DR

VIP/eth0:0 192.168.9.200/24
LB/eth0 192.168.9.244
RS1 192.168.9.150 with lo0:0 192.168.9.244/32 noarp
RS2 192.168.9.160 with lo0:0 192.168.9.244/32 noarp

Run the follwing script on LB Server:

ipvsadm -C
ipvsadm -A -t 192.168.9.200:554  -s rr
ipvsadm -a -t 192.168.9.200:554  -r 192.168.9.150 -g
ipvsadm -a -t 192.168.9.200:554  -r 192.168.9.160 -g

Run

realplay rtsp://192.168.9.200/test.rm

for a test.

Conclusion

References


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