SAMPA SRO

Project dependencies

1. ersap-java
2. ersap-cpp
3. ersap-vtp
4. ersap-jana

Installation

NB. For installation you should define ERSAP_HOME environmental variable.

1. ersap-java instructions
2. ersap-cpp instructions
3. ersap-vtp instructions
4. ersap-jana instructions

Building SAMA DAQ codebase

NB. The package is kindly provided by the ALICE collaboration and is modified the EPSCI SRO group to make it streaming The modified package can be found at /home/gurjyan/Devel/stream/exp-sampa

1. login into alkaloid.jlab.org
2. copy the ALICE modified package into your own directory
3. follow instructions in README to build the package

Configuration and running

NB. We recommend defining and creating $ERSAP_USER_DATA directory. No worries about the mentioned directory structure. After the first ERSAP execution the $ERSAP_USER_DATA directory will get proper structure. Use the `ersap-shell` (ERSAP CLI) to run the services locally (running on a farm will require artifacts. The shell provides a high-level interface to configure and start the different ERSAP components required to run an application.

1. Start the ERSAP shell:
   • $ERSAP_HOME/bin/ersap-shell
2. Define the application within a `services.yaml` file. An example of the file can be found in the ersap-jana installation manual. NB: The default location for the application definition file is in $ERSAP_USER_DATA/config dir
   • ersap> set servicesFile services.yaml
3. Optionally you can change the number of parallel threads used by the services to process requests
   • ersap> set threads <NUM_THREADS>
4. Start the data processing. This will start the main Java DPE, a C++ DPE if the C++ service is listed in `services.yaml`,and it will run the streaming orchestrator to process the data-stream.
   • ersap> run local

You can put the above shell commands into a script ( e.g. jana.ersap) and run the script instead. To do that you can use ERSAP CLI (ersap-shell)

`> $ERSAP_HOME/bin/ersap-shell jana.ersap`