How to setup a network topology

This means that if an agent runs out of sessions, it will possibly be reallocated sessions already allocated to another agent. When for a given agent the number of running sessions reaches its maximum number of sessions, the agent will put incoming sessions in a "queued" status until the number of running sessions falls below the maximum of sessions.

If an agent is unavailable because it crashed for example , all its sessions in queue will be re-assigned to another load balanced agent that is neither running any session nor having sessions in queue if the user parameter Use the new load balancing is set to Yes. Define a set of physical agents, and link them in a hierarchy of agents see "Creating a Physical Agent" for more information.

Run the executions on the root agent of your hierarchy. Oracle Data Integrator will balance the load of the executions between its linked agents. This section provides the high level steps you need to perform to set up a high availability topology. Agent definitions should point to the load balancer address instead of the individual server addresses. You can always modify the topology after an initial setting: Create the contexts corresponding to your different environments.

Note: You can use the New Model and Topology Objects dialog to create a model and associate it with topology objects, if connected to a work repository. Click New context in the navigation tree header. Fill in the following fields: Name : Name of the context, as it appears in the Oracle Data Integrator graphical interface.

From the File menu, click Save. Note: Frequently used technologies have their data server creation methods detailed in Connectivity and Knowledge Modules Guide for Oracle Data Integrator.

Installation of a Client Connector Data source configuration Refer to the documentation of the technology you are connecting to through the data server and to Connectivity and Knowledge Modules Guide for Oracle Data Integrator.

Use this user's schema as your Work Schema for all data schemas on this server. Tip: The list of technologies that are displayed in the Physical Architecture navigation tree may be very long.

To narrow the list of displayed technologies, you can hide unused technologies by selecting Hide Unused Technologies from the Topology Navigator toolbar menu.

This is not an exhaustive list. However, not all JDBC drivers accept the same values. At times, you are advised to leave them empty. Note: The greater the number specified in the Fetch Array and Batch Update values, the fewer are the number of exchanges between the data server and Oracle Data Integrator.

However, the load on the Oracle Data Integrator machine is greater, as a greater volume of data is recovered on each exchange. Batch Update management, like that of Fetch Array, falls within optimization. It is recommended that you start from a default value 30 , then increase the value by 10 each time, until there is no further improvement in performance. As per the Fetch Array and Batch Update sizes, you should perform some benchmarking to decide what is the best value for your environment.

Details of the performance of the individual source and target threads can be viewed in the Execution Details section for the loading task in Operator. The Execute value is the time spent on performing the JDBC operation and the Wait value is the time the Source is waiting on the Targets to load the rows, or the time the Target is waiting on the Source to provide rows.

This is because the source rows are processed and loaded by one out of a number of target threads in an indeterminate manner. To add a connection property to a data server: On the Properties tab click Add a Property. Specify a Key identifying this property. This key is case-sensitive.

Specify a value for the property. Before defining the data sources in Oracle Data Integrator, please note the following: Datasources for WebLogic Server should be created with the Statement Cache Size parameter set to 0 in the Connection Pool configuration. Note that this name must match the name of the data source in your application server. There are several ways to create data sources in the application server, including: Configure the data sources from the application server console.

These SQL commands are stored in the master repository along with the data server definition. Note: The Expression Editor displays only the substitution methods and keywords that are available for the technology of the data server.

Note that global variables are only displayed if the connection to the work repository is available. Note: Transactions from 0 to 9 and the Autocommit transaction correspond to connection created by sessions by procedures or knowledge modules. To test a connection to a data server: In Topology Navigator expand the Technologies node in the Physical Architecture navigation tree and then expand the technology containing your data server.

Double-click the data server you want to test. The Data Server Editor opens. Click Test Connection. The Test Connection dialog is displayed. Click Test to launch the test. Before creating a Physical Schema, note the following: Not all technologies support multiple schemas.

If the technology supports multiple schemas: Select or type the Data Schema for this Data Integrator physical schema in Go to the Context tab. Click Add. If no Logical Schema for this technology exists yet, you can create it from this Editor. To create a Logical Schema: Select an existing Context in the left column. Type the name of a Logical Schema in the right column.

Select the technology you want to attach your logical schema to. Right-click and select New Logical Schema. Fill in the schema name. Select New Agent. Fill in the following fields: Name : Name of the agent used in the Java graphical interface.

Note: Avoid using Internal as agent name. Oracle Data Integrator uses the Internal agent when running sessions using the internal agent and reserves the Internal agent name. Select New Logical Agent. Fill in the Agent Name. Also, JARs which are selected as shared, should be deployed as a shared library manually into the Weblogic server. Here, two ring networks are created, with the data in each flowing in opposite directions. Star Topology is the kind of network topology in which all the nodes are connected via cables to a single node called a hub, which is the central node.

The hub can be active or passive in nature. Active hubs contain repeaters, while passive hubs are considered non-intelligent nodes. Each node contains a reserved connection to the central node, which the central node acting as a repeater during data transmission. Mesh topology is the kind of topology in which all the nodes are connected with all the other nodes via a network channel. Mesh topology is a point-to-point connection.

Mesh topology has two techniques for transmission of data, i. In the routing technique, the nodes possess a routing logic, like the logic for the shortest distance to the destination node or the logic to avoid routes with broken connections.

In the flooding technique, all the network nodes receive the same data. This leaves us no need for routing logic. This technique makes the network robust but results in unwanted load on the network. Tree topology is the topology in which the nodes are connected hierarchically, with all the nodes connected to the topmost node or root node.

Hence, it is also known as hierarchical topology. All the users on the network which include subnet 1 and subnet 2 would be connected to the respective ports on the switch. The users on subnet 1 and subnet 2 would belong to one large broadcast domain.

In this topology, a managed switch would be used. A managed switch would give you the provision to setup multiple broadcast domains on a single network. The broadcast domains are setup using vlans. In this example, we create two vlans on the switch. The ports on the switch are configured for respective vlans. Each subnet is associated with a VLAN. Connect the respective systems belonging to subnet 1 and subnet 2 to the respective ports.

In topology 1 and 2, you would need to use a router for communicating between the subnets. In topology 1, a router which has atleast two LAN interfaces should be used. This is to create two physical networks. In topology 2, the router should support one LAN interface which has support for Essentially, it means that the hub can find the correct address of the recipient computer and transfer the data to the right place.

These additional nodes are clients and all link back to the central hub. Systems administrators and network designers have lots to consider when planning and implementing a topology. One way to make this job a little easier is to create a network diagram to help you communicate your design, deployment, and topology plans across the team. Presenting your star topology as a visual helps you plan, as well as identify any mismatched connections or weak points.

It also eliminates misunderstandings and mistakes within your team. Think of it as a blueprint or map to your network layout. Using dedicated diagramming software can really take the stress out of designing your network. Rather than wrestling with clipart boxes and arrows, you can grab a template from a pre-made list and edit it with custom icons including Amazon Web Services AWS icons and Google Cloud Platform GCP icons , arrows, boxes, and colors.

All of this means you can get your architecture setup just right the first time. This post was originally published on April 12, , and updated most recently on December 31, Please try again. Sorry…something went wrong. Please try again later. Get your server setup spot-on with star topology.