Redundancy planning, Key concepts, Lookup services – Grass Valley iControl V.6.02 User Manual
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iControl
User Guide
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• Where a large number of devices are being monitored, consider setting up multiple GSMs
(one per Application Server).
• Run a maximum of three Densité Managers on an Application Server.
• Allocate a maximum of 150 streams per Densité Manager. A typical Densité frame
containing 10 DEC cards and 10 UAP cards creates 30 streams, whereas a Densité frame
with SCP cards generates 22 streams.
• Assign a maximum of five Densité frames to a Densité Manager.
Redundancy Planning
While iControl Application Server failures are not common, it is prudent to plan for such an
eventuality. Fortunately, recovery from a hardware failure can be ensured by the use of one or
more standby Application Server(s). A standby server takes over all the system monitoring and
control processes that were running on a main Application Server prior to a failure.
Additionally, unexpected power disruptions, such as might occur during a power failure, can
damage the file system on an iControl Application Server. It is strongly recommended that all
Application Servers be connected to a standby power source, such as a UPS (Uninterruptible
Power Supply), as a preventive measure.
Before putting your Application Server into operation, you should consider implementing a
redundancy plan. A redundancy plan defines the use of standby Application Servers in case of
hardware failure. This ensures that all the processes that run on the main server(s) will
continue to operate uninterrupted.
Redundancy (or recovery) planning is best done at the same time as the system set-up. Full
redundancy requires one standby server for each running Application Server. More typically,
an iControl system includes one standby server for every five primary Application Servers,
since it is unlikely that more than one will fail at the same time.
Key Concepts
Lookup Services
iControl—and Grass Valley products in general—use a lookup service to get information on
remote programs or machines, and use that information to establish communications. In this
way, cards, frames and other devices can make their presence known on an iControl network,
and thus can participate in monitoring and control operations.
IMPORTANT: If you require assistance with your recovery planning, please contact Grass Valley
Technical Support (see
See also
For more information, see:
•
"Application Server Auto-failovers and Manual Takeovers"
•