Device redundancy

Table of contents

  1. FAQ
  2. Introduction
  3. Configuration
  4. Operation
  5. Troubleshooting
  1. FAQ

  2. Introduction

    All COMPANY_NAME devices may be redunded. The basic principle is that one device can redund another device. So-called "Hot-Spare" units and "Main" units are strictly identical, but configured in a different way.

    A Hot-Spare unit can be configured to monitor one or several Main units. When one of the monitored Main units fails, the Hot-Spare unit starts working, running with the Main unit's last known parameters. The Hot-Spare unit generates an SNMP trap to signal it has started. The operator must then have a manual action: checking what's wrong with the Main unit, fixing it, then restarting it and stopping the Hot-spare unit.

    One same Main unit may be monitored by several Hot-Spare units. If this Main unit fails, only one Hot-Spare unit will start; the other Hot-Spare units will continue monitoring the other Main units they have to monitor.
  3. Configuration

    1. Main units configuration

      In "Device" > "General" panel, set "Unit type" to "Main unit" and save pending changes.

      • Start-up delay: Tasks startup is delayed if Main unit does not receive Standby command from Hot-spare unit. (see Sparing steps)

        Can be enabled if double publication issue is observed when Main unit goes back to life while Hot-spare unit is Running; or to restart transcoding services automatically on the Main unit if the Hot-spare unit, while it's running, becomes unreachable.

      • Wake up: Force Main unit to leave Standby mode and reinstantiate its tasks.

        Make sure Hot-spare unit is not running before waking-up Main unit to avoid double publication issue.

    2. Hot-spare units configuration

      • In "Device" > "General" panel, set "Unit type" to "Hot-spare unit" and save pending changes.

      • In the device "Redundancy" panel, set "Sparable Coders" to the semicolon-separated list of the IP addresses of Main units to be monitored and spared, and set "Other Spares" to the semicolon-separated list of the IP addresses of the other Hot-spare units.

  4. Operation

  5. Troubleshooting