Starting and Stopping s-Server

This topic includes the following subtopics:

Starting the SQLstream s-Server

To start your SQLstream s-Server, run the script named “s-Server”, located in the bin directory:

$SQLSTREAM_HOME/s-Server/bin/s-Server

If you have included \$SQLSTREAM_HOME/bin in your PATH then you can just run

s-Server

$SQLSTREAM_HOME refers to the installation directory, such as /opt/sqlstream/<%VERSION%>.

On most Linux systems, one way to to add $SQLSTREAM_HOME to your system’s path is by creating a script file in /etc/profile.d with lines of code similar to the following:

SQLSTREAM_HOME="/opt/sqlstream/5.1.0.15221/s-Server"
export SQLSTREAM_HOME
PATH=$PATH:$HOME/bin:$JAVA_HOME/bin:$SQLSTREAM_HOME/bin
export PATH

Confirming that SQLstream s-Server is running

To confirm that SQLstream s-Server is running, do one of the following:

  • Check if s-Server appears in SQLstream s-Studio.
  • Use jps -l to confirm that “AspenVJdbcServer” is running. (This is the actual name of s-Server.)

Start SQLstream s-Studio

Once the SQLstream s-Server is started, you can open SQLstream s-Studio by double-clicking its desktop icon or by running the SQLstream script from any directory. When you launch s-Studio, you will need to enter connection information for your installation of s-Server. If the server is running, s-Studio should connect to it and its icon will appear in the left pane of s-Studio:

Use jps -l

SQLstream s-Server runs as a Java Virtual Machine called  ”AspenVJdbcServer” To confirm that SQLstream s-Server is running, you can use the Java jps -l command. (See https://docs.oracle.com/javase/8/docs/technotes/tools/unix/jps.html for more detail on this command.) This command will produce something like the following if s-Server is running:

6301 sun.tools.jps.Jps
2560 com.sqlstream.aspen.server.AspenVJdbcServer

Stopping the SQLstream s-Server

To stop the SQLstream s-Server, type:

   !quit

into the SQLstream s-Server terminal window. This will stop the server, create a checkpoint backup of the repository, and close the window.

If there are open client connections to the server (for example, if the user interface is running), the server will alert you and continue running.

If you need to stop the server in spite of open client connections, type:

!kill

into the SQLstream s-Server terminal window. This will force closure of the connections, then stop the server and create a checkpoint backup of the repository.

In the event that neither !quit nor !kill is able to stop the server, you can type Ctrl+C into the SQLstream s-Server terminal window. This will abort the server and shut down the repository, but will not create the checkpoint backup of the repository. When you next restart the server, it will restore the previous checkpoint backup, so any changes made to repository objects since then will be lost.

Obviously, this option should only be used in extreme circumstances.

For more information on catalogs and checkpoints, see the topics Backups and Code Control in this guide.

Managing s-Server as a Service

You can choose to run s-Server as a service. This is an option in the installer. Once s-Server is installed as a service, it will automatically start whenever the machine on which s-Server is running is started. You can also manually start, stop, and restart the s-Serverd service using standard Linux service commands.

The s-Serverd service can be found in: /etc/init.d/s-serverd

Starting, stopping, and restarting the service

You can start, stop, restart, and check the status of s-serverd using the following standard Linux service commands:

Command Result
service s-serverd start Starts service
service s-serverd stop Stops service (equivalent to !kill)
service s-serverd restart Stops then starts service.
service s-serverd status Tells whether s-serverd is running

Setting a checkpoint

You can specify a checkpoint for start, stop, and restart, using the following syntax:

service s-serverd stop <checkpoint name>

or

service s-serverd stop --with-checkpoint <checkpoint name>

Use the same syntax to set a checkpoint for restart. Note: If you do not specify a checkpoint when stopping, a default checkpoint will be used when the service stops. Once you establish a checkpoint, you can start the service at the same point by indicating the checkpoint name in the start command:

service s-serverd start <checkpoint name>

or

service s-serverd start --with-checkpoint <checkpoint name>