> For the complete documentation index, see [llms.txt](https://tmediadocs.telcobridges.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://tmediadocs.telcobridges.com/telecom-references/developer-reference/toolpack-api/tboamapp.md).

# tboamapp

### Started By

Tboamapp is started by the [tbtoolpack\_service](https://tmediadocs.telcobridges.com/other-pages/operations/tbtoolpack-service). [Tbtoolpack\_service](https://tmediadocs.telcobridges.com/other-pages/operations/tbtoolpack-service) also monitors tboamapp and restarts it if required.

### Roles

#### Master

The master tboamapp is responsible for these roles:

* Starting the election process if another tboamapp instance is detected/lost
* Replicating packages (files + binaries) from [primary](https://tmediadocs.telcobridges.com/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/primary-secondary) to [secondary](https://tmediadocs.telcobridges.com/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/primary-secondary) host
* Managing/monitoring all the other Toolpack applications running on its host(ensuring that they are always running)
* Selecting configuration database(s) ([primary](https://tmediadocs.telcobridges.com/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/primary-secondary) or [secondary](https://tmediadocs.telcobridges.com/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/primary-secondary))
* Creating/upgrading the configuration database
* Applying package upgrades throughout the system
* Installing firmware and licenses on the device hardware
* Applying configuration changes throughout the system

#### Slave

The master tboamapp is responsible for these roles:

* Starting election process if another tboamapp instance is detected/lost
* Managing all the other Toolpack applications running on its host(ensuring that they are always running)

### High Availability

Tboamapp is a [Master/Slave](https://tmediadocs.telcobridges.com/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/master-slave) type application. Every time a tboamapp instance is detected or lost, an election process is triggered. The election process will select one tboamapp instance to become [master](https://tmediadocs.telcobridges.com/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/master-slave), and the other will be [slave](https://tmediadocs.telcobridges.com/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/master-slave). If it is available, the tboamapp running on the [primary](https://tmediadocs.telcobridges.com/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/primary-secondary) host will always win the election process; therefore, the [master](https://tmediadocs.telcobridges.com/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/master-slave) will always fall back to the [primary](https://tmediadocs.telcobridges.com/products/tmedia/features-and-solutions/features/redundancy-and-high-availability/primary-secondary) host when available.

### Logs

* Logs for tboamapp can be located in one of the following three places:

> \[InstallDir]/toolpack/setup/*SystemId*/*MajorVersion*/apps/tboamapp/ /lib/tb/toolpack/setup/12358/2.3/apps/tboamapp/ C:\TelcoBridges\toolpack\setup\12358\2.3\apps\tboamapp\\


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