Table of Contents
This tutorial demonstrates how to deploy a simple topology of 2 types of tasks (TaskTypeOne and TaskTypeTwo).
By default, there will be deployed one instance of TaskTypeTwo and 5 instances of TaskTypeOne.
Additionally TaskTypeTwo subscribes on key-value property from TaskTypeOne, which name is TaskIndexProperty.
Once TaskTypeTwo receives values of TaskIndexProperty from all TaskTypeOne, it will set the ReplyProperty property.
Number of instances can be changed in the topology file (tutorial1_topo.xml) using --instances option of TaskTypeOne.
Please note that number of worker nodes in the SSH-plugin configuration file (tutorial1_hosts.cfg) has to be changed accordingly.
After DDS is installed the tutorial can be found in $DDS_LOCATION/tutorials/tutorial1
The source code of tasks is located in "DDS_SRC_DIR"/dds-tutorials/dds-tutorial1
Files of the tutorial
task-type-one: executable of the task TaskTypeOne
task-type-two: executable of the task TaskTypeTwo
tutorial1_topo.xml: a topology file
tutorial1_hosts.cfg: a configuration file for DDS SSH plug-in
Before running the tutorial make sure that:
1) Default working directory ~/tmp/dds_wn_test must exist before running the tutorial. The directory can be changed in tutorial1_hosts.cfg.
2) SSH passwordless access to the localhost is required.
cd $DDS_LOCATION/tutorials/tutorial1 dds-session start --local dds-submit -r ssh -c tutorial1_hosts.cfg dds-topology --activate tutorial1_topo.xml
To check the result, change to ~/tmp/dds_wn_test.
If the default setup was used, then there will be WN directories located: wn, wn_1, wn_2, wn_3, wn_4, wn_5.
DDS catches output of tasks and saves it in log files under names [task_name]_[date_time]_out|err.log. For example: TaskTypeOne_2015-07-16-11-44-42_6255430612052815609_out.log
This tutorial demonstrates how to use DDS custom commands for user task and for utility.
After DDS is installed the tutorial can be found in $DDS_LOCATION/tutorials/tutorial2
The source code of tasks is located in "DDS_SRC_DIR"/dds-tutorials/dds-tutorial2
Files of the tutorial
task-custom-cmd: user task which receives and send DDS custom commands
ui-custom-cmd: utility which connects to DDS commander and send custom commands to user tasks
tutorial2_topo.xml: a topology file
tutorial2_hosts.cfg: a configuration file for DDS SSH plug-in
Before running the tutorial make sure that:
1) Default working directory ~/tmp/dds_wn_test must exist before running the tutorial. The directory can be changed in tutorial1_hosts.cfg.
2) SSH passwordless access to the localhost is required.
cd $DDS_LOCATION/tutorials/tutorial2 dds-session start --local dds-submit -r ssh -c tutorial2_hosts.cfg dds-topology --activate tutorial2_topo.xml ui-custom-command
To check the result, change to ~/tmp/dds_wn_test.
If the default setup was used, then there will be WN directories located: wn, wn_1, wn_2, wn_3, wn_4, wn_5.
DDS catches output of tasks and saves it in log files under names [task_name]_[date_time]_out|err.log. For example: TaskTypeOne_2015-07-16-11-44-42_6255430612052815609_out.log
After executing ui-custom-command there will be an output to the console with receiving and sending custom commands. Also check output files of tasks.