Takeover or recovery of an Operations Console connection

 

You can use these functions to take control of another console device.

A special set of functions included in i5/OS^® allow an Operations Console to take control from another console device. The two main actions that you can do are:

• Takeover is the process used for a LAN-connected console-capable device to take control from the current LAN-connected console device. This take over action can not be used with directly attached consoles.

• Recovery is the process of regaining control of the job running on the console after a problem with the console was encountered. The recovery process may be to the same console device or a different console device and may be facilitated by additional work to enable a device using a different connectivity. The exception is twinaxial console which does not use the same type of 5250 emulation and thus cannot recover the console.

Every console-capable device running 5250 emulation, regardless of connectivity, will be presented a window of data regardless of whether it is the console when it successfully connects. This means that more than one device will have data on the window after the console has been established. A console device will not have a blank window showing Disconnected. This action allows the job at the console to be "transferred" to another device without causing loss of data. When the console option for takeover is enabled, the system also has enhanced recoverability from loss of the console.

The recovery action is accomplished by suspending the data stream to a console that loses a connection, or is being taken over, saving further data and then sending that data to the next device to become the console, even if the device is the same former console. Recoverability is essentially just taking over the console from the same or different qualified device regardless of what the former console was doing. The default setting for the console take over and recovery function is disabled. If this function is disabled, all console-capable devices will open the Console Information Status window whenever they are not the active console.

Benefits of these functions include convenience and redundancy. Console-capable devices can be placed around a site, or multiple sites, allowing users to move around and gain control of the system from any of these devices. Whatever the previous console's activity was, the new console is at the exact same place, even during the process of restarting the system or installing the i5/OS operating system. When the console option for takeover is enabled, the system also has enhanced recoverability from the loss of the console.

• Takeover details
  Here is the additional information about the console takeover function.

• Recovery details
  Here is the additional information about the console recovery function.

• Enabling console takeover
  Before you can enable console takeover, have the Take over console privilege.

• Scenarios: Takeover and recovery
  These scenarios can help you understand the takeover and recovery options.

 

Parent topic:

Management of multiple consoles

 

Related reference

Console planning considerations
Planning considerations for your backup console
Control tasks between users
Management of multiple consoles