Configure and deploy calculation nodes

The CrestMaths Service (Calculation Node) contacts the calculation hub at service start to obtain the location of the fileshare and register itself as ready to begin work. Ensure that the calculation node machine can resolve the address of the fileshare previously used in the calculation hub configuration.

1. Go to the Node\CalculationNodeConfig subfolder in the installation folder (D:\Spiral\CalculationHub_Install).

2. Open server.config in your favorite text editor.

3. Edit the following attributes of the Hub element:

   • Set the url attribute to the URL of the calculation hub website not including send.ashx.

   • Set the StorageConnectionString attribute to the local path to the JobQueue folder created in Configure the File Share, for example D:\Spiral\JobQueue.

     If the folder is on a network drive, enter the corresponding network address, such as \\<calculationhub.hostname>\JobQueue$.

4. Save your changes to server.config.

5. Grant Network Service modify permissions on the Node folder. This is required as the log files are written here.

6. Open an elevated command prompt or PowerShell console.

7. Run the following command to create the calculation node service:

   sc.exe create CalculationNode binpath=D:\Spiral\CalculationHub_Install\Node\Calculation.Node.exe

8. Run the following three commands to change the logon and recovery configuration of the service:

   sc.exe config CalculationNode start=auto obj="NT Authority\NetworkService"

   sc.exe failure CalculationNode reset=86400 actions=restart/1000/restart/1000

   sc.exe start CalculationNode

   If the installation was successful and the service has started, you will see the registration of the node on the calculation hub by opening the Workers page.

   

Repeat these steps to install configure and register additional calculation nodes on other machines.