| Geographical high availability | |||
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This topic shows the Lucent CM components in a geographical high availability configuration on two locations. The configuration does not show any additional supporting network elements such as routers, DNS servers, or LDAP servers.
Geographical high availability provides higher availability over ordinary high availability. In geographical high availability even when a complete site is lost, the full Lucent CM system capacity is maintained.
Geographical high availability requires more nodes to get a same capacity as ordinary high availability.
In ordinary high availability the loss of a complete site, result in the loss of the entire Lucent CM system.
The application nodes are set up in a N+N configuration. The database nodes are paired.
Geographical high availability (HA) configurations are:
Geographical high availability with universal nodes
Geographical high availability with application and database nodes in a single zone
Geographical high availability with database nodes in secure zone
A two-location, high availability configuration with universal nodes:
A two-location, high availability configuration with application nodes and database nodes in a single zone:
A two-location, high availability configuration with application nodes in the demilitarized zone and database nodes in the secure zone:
To increase capacity, you can:
Add pairs of U-nodes (on at each location).
Change to a configuration with application node and database nodes and add nodes.
When changing to a configuration with application and database node, initial capacity is not increased. The capacity increase is done by adding application and database nodes. When adding nodes, a 8:2 ratio must be maintained between application nodes and database nodes.
Geographical high availability capacity numbers:
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Configuration |
Initial user capacity |
User capacity increase |
Maximum user capacity |
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Sun® FireTM X2100 M2 | |||
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Geographically redundant high availability (U-nodes) |
8,640 |
17,280 |
86,400 |
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Geographically redundant high availability (A-nodes and D-nodes) |
10,800 |
21,600 |
1,933,200 |
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Sun® FireTM X2100 | |||
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Geographically redundant high availability (U-nodes) |
4,500 |
9,000 |
45,000 |
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Geographically redundant high availability (A-nodes and D-nodes) |
5,625 |
11,250 |
1,006,875 |
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Sun® FireTM v20z | |||
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Geographically redundant high availability (U-nodes) |
3,846 |
7,692 |
38,460 nodes |
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Geographically redundant high availability (A-nodes and D-nodes) |
4,808 |
9,616 |
860,632 |
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