Grass Valley iTX System v.2.6 - Manual (Page 305)

System resilience
Running a back-up Database Server
On a back-up Database Server machine, you run both a back-up System Database and a set of
iTX services.
Back-up System Database
You use Microsoft SQL Server functionality (either clustering or mirroring) to keep the back-up
System Database synchronised with the main System Database.
Back-up system services
You run a duplicate set of iTX services in parallel with the main iTX services. Some may run in
load-balanced mode and perform tasks in the system. You configure others to run in back-up
mode; any of these becomes active only if the corresponding primary service fails.
Preparing a back-up Database Server
The machine that you use as a back-up Database Server should have the same technical
specification as the main Database Server machine. It must also have a static IP address for its
network connection.
Just as iTX services that need to contact a primary Locator Service do so by using the host name
"omn-locator", those that need to contact a back-up Locator service use the host name
"backup-locator". To enable them to do so, you need to map this host name to the IP address
of the back-up Database Server in local-machine Hosts files or on a WINS or DNS server.
If you intend to run a back-up System Database, you must install Microsoft SQL Server on the
back-up Database Server before installing the iTX software.
Set up a back-up Database Server to run the iTX services
1. Do one of the following, depending on which method your iTX system uses to resolve host
names.
•
Enter the IP address of the back-up Database Server for the host name "backup-locator"
on a WINS or DNS server.
• On each machine in the iTX system, enter the IP address of the back-up Database Server
for the host name "backup-locator" in the local Hosts file. You need to do this for the
main Database Server and Media Store, and for all Output Servers, Encode Servers, and
Desktop Client workstations.
2. On the back-up Database Server machine, install the Database Server module.
3. Add the –backup start-up parameter in the configuration of the iTX services that are to run
as back-up services. More details , page 223.
No configuration is necessary for load-balanced services.
March 2015 System Administrator Guide Page 305 of 404