Scale and Performance

Overview

This section describes the supported configurations and corresponding scale for unified deployment topologies and modular deployment topologies, including their Geo-Redundancy and Round Trip Time (RTT) requirements.

The supported configurations and scale are based on a standard profile for each subscriber, which includes the following:

• Two endpoints (physical phone and soft client) per subscriber.

• Voice Mail

• Extension Mobility (EM)

• Single Number Reach (SNR)

• IM and Presence

Scale limits are not enforced by the system. However, exceeding the limits can result in significant performance degradation.

With regards Geo-Redundancy options, the table describes the difference between Active and Standby nodes:

Active Node	A Node that can process transactions
Standby Node	A Node that is powered on and running the VOSS Automate software, but cannot process transactions.

For RTT across different UC components, this should not exceed 400ms. RTT will impact the duration of a transaction, but only for the remote leg, in other words, performing an action on the remote device.

Unified Node Deployments

Configuration	Number of Unified Nodes	Number of Web Proxy Nodes	Supported Scale (# Subscribers)	Geo-Redundancy (Y/N)
Single node cluster VOSS Automate	1	0	50,000	NA
Two-Node VOSS Automate Across Data Centers	2	1 [1]	50,000	Yes [2] (Active-Standby) If RTT <= 10ms
Multi-Node VOSS Automate Across Data Centers	4	2 [1]	500,000	Yes (Active-Active) If RTT <= 10ms
	6	2 [1]	500,000	Yes (Active-Standby)
Multi-Node VOSS Automate One Data Center	4	2 [1]	500,000	No

Modular Node Deployments

Configuration	Number of Modular Nodes	Number of Web Proxy Nodes	Supported Scale (# Subscribers)	Geo-Redundancy (Y/N)
Application VOSS Automate Across Data Centers	1-8 [3]	2 [1]	500,000	Yes (Active-Active) If RTT <= 10ms
	1	2 [1]	500,000	Yes (Active-Standby)
Modular Database VOSS Automate Across Data Centers	2	2 [1]	500,000	Yes If RTT <= 10ms
	1	2 [1]	500,000	Yes
Multi-Node VOSS Automate One Data Center	4	2 [1]	500,000	No
Modular Application VOSS Automate One Data Center	1-8 [3]	2 [1]	500,000	No
Modular Database VOSS Automate One Data Center	3	2 [1]	500,000	No

[1] (1,2,3,4,5,6,7,8,9,10,11)

Two web proxy nodes can be used. It may be omitted if an external load balancer is available.

[2]

With only two Unified nodes, with or without Web proxies, there is no High Availability. The database on the primary node is read/write, while the database on the secondary is read only.

Only redundancy is available.

• If the primary node fails, a manual delete of the primary node on the secondary and a cluster provision will be needed.

• If the secondary node fails, it needs to be replaced.

Refer to the topic on DR Failover and Recovery in a 2 Node Cluster in the Platform Guide.

[3] (1,2)

Horizontal scaling of Application nodes allows for increased API performance and transaction throughput.