Calculating the number of servers required
Bravura Security strongly recommends creating at least two or three replicated Bravura Security Fabric database nodes for fault tolerance and backup, depending on which products are licensed and which features are implemented. When Bravura Privilege is installed, or when close to 100% uptime is required from the instance, the recommended minimum is three. This is because when backend database replication is performed, at least two database nodes must go down simultaneously.
On the other hand, avoid setting up too many replicated database nodes. Likely, the additional overhead of any more than six fully replicated nodes would outweigh the advantage of having multiple nodes to do work. If you implement transparent password synchronization, it is recommended that you avoid having more than five concurrently active database nodes.
Note
Each node must be maintained at the same level.
Calculate the number of database nodes you require with the following formula:
N = ceil (1 + [ U∕P * 7∕5 ∕Z * A ]∕[60 * 60 * C∕T ])
Where:
U = # of users
P = days between password expiry
Z = time zones
A = accounts/user
C = # of concurrently running connectors
T = seconds on average to change a password
For example, when:
U = 10000 people
P = 45 days
Z = 1 time zone
A = 10 accounts/user
C = 30 connectors at a time
T = 2 seconds
then:
N = ceil (1 + [10000∕45 * 7∕5∕1 * 10]∕[60 * 60 * 30∕2])
N = ceil (1 + [3111]∕[54000])
N = ceil (1.0576)
N = 2
See also: