- terminal 1
```
cd services
yarn run-blob-service-dev-mode
```
- terminal 2
```
cd services
yarn run-backup-service-dev-mode
```
- terminal 3
```
git clone https://github.com/karol-bisztyga/grpc-playground.git
cd grpc-playground
git checkout backup-async
./build.sh
./cmake/build/bin/client
```
- in terminal 3 create a new backup
```
n
```
- in terminal 3 create a new log
```
l
```
- in terminal 3, in order to append a new attachment holder to the backup, use the command `b` and for the log - `k`. After doing all this, check the target backup/log item in the database and see that the `attachmentHolders` filed is updated (for both items this field has the same name).