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Welcome
Learn about the core capabilities of Teracloud® Streams, its architecture, and key concepts.
Introduction to Teracloud® Streams
Learn about the core capabilities of Teracloud® Streams, its architecture, and key concepts. This section provides an overview of the platform's stream processing capabilities, development approaches, and runtime environment to help you understand how Teracloud Streams can address your real-time data processing needs.
Teracloud® Streams components
Teracloud® Streams consists of many components such as stream applications, domains, instances, and resources.
Instances
A Teracloud® Streams instance is a runtime environment for stream applications. It is composed of a set of interacting services running across one or more resources. Before you can use Teracloud Streams, you must create at least one instance.

Welcome
Learn about the core capabilities of Teracloud® Streams, its architecture, and key concepts.
- Information roadmap
  Find links to the information resources that are available for Teracloud® Streams. Whether you're just getting started with analyzing streaming data or you're looking to expand your knowledge, we have the information that you need.
- Introduction to Teracloud® Streams
  Learn about the core capabilities of Teracloud® Streams, its architecture, and key concepts. This section provides an overview of the platform's stream processing capabilities, development approaches, and runtime environment to help you understand how Teracloud Streams can address your real-time data processing needs.
  - Teracloud® Streams features and architecture
    Teracloud® Streams consists of a programming language, an API, and a runtime system that can run the applications on a single or distributed set of resources.
  - Teracloud® Streams components
    Teracloud® Streams consists of many components such as stream applications, domains, instances, and resources.
    - Stream applications
      Stream applications typically involve ingesting live data streams from a variety of sources, transforming the data to prepare it for analysis, and applying analytics to derive intelligence and make decisions. The main components of stream applications are tuples, data streams, operators, processing elements (PEs), and jobs.
    - Domains
      A Teracloud® Streams domain is a logical grouping of resources in a network for common management and administration. To use Teracloud Streams, you must create at least one domain.
    - Instances
      A Teracloud® Streams instance is a runtime environment for stream applications. It is composed of a set of interacting services running across one or more resources. Before you can use Teracloud Streams, you must create at least one instance.
    - Domain and instance services
      When you start a Teracloud® Streams domain, instance, or stream application, services start on the appropriate resources.
    - Interfaces
      Teracloud® Streams provides a graphical interface for monitoring and managing Streams services and jobs. A command line interface as well as REST and JMX programming interfaces are also available.
    - Resources
      Resources are physical and logical entities that Teracloud® Streams uses to run services.
    - Views, charts, and tables
      A view defines the set of attributes that can be displayed in a chart or table for a specific viewable data stream.
- Release notes
  Learn about the new, deprecated, and removed features in Teracloud® Streams Version 7.2.
Installing
Use this information to install, upgrade, and uninstall the Teracloud® Streams product.
Configuring
Create a basic or an enterprise domain which is a single point for configuring and managing common resources, security, and instances.
Administering
Administer the product by using the Teracloud® Streams graphical user interface, APIs, or the streamtool command-line interface.
Developing
Develop stream applications with the Streams Processing Language (SPL), Java, and Python.
Troubleshooting
Resolve problems with Teracloud® Streams using the troubleshooting tools provided with the product as well as the resources offered by Teracloud Support.
Reference
Find details on the SPL language, toolkits, APIs, commands, and more.
Glossary
Use this glossary to find terms and definitions for Teracloud® Streams.

Teracloud® Streams instances

A Teracloud® Streams instance is a runtime environment for stream applications. It is composed of a set of interacting services running across one or more resources. Before you can use Teracloud® Streams, you must create at least one instance.

Before you can create an instance, you must create a domain. Instances use the resources and security model that are configured in the domain. Each Teracloud® Streams instance operates as an autonomous unit and can be shared by multiple users. You can create multiple instances in a domain.

Even though instances can share resources, there is no logical interference with other instances. To avoid any physical interference, for example related to competing for the CPU cycles, you can allocate resources exclusively to instances.

Jobs are submitted to an individual instance, and no other instances are aware of the jobs. For example, you install Teracloud® Streams on a set of resources A, B, C, and D. You can configure instance1 to use resources A and B and configure instance2 to use resources B, C, and D. Jobs that you submit to instance1 are not aware of jobs that you submit to instance2, even though they share a common resource B.

The type of Teracloud® Streams environment determines many of the configuration decisions for Teracloud® Streams instances, for example:

Production environment: Provide a set of resources and network infrastructure that is solely allocated to the Teracloud® Streams instance and its applications.
Test and development environment: A set of resources can be shared by multiple instances that are used by individual users or a group of users. The implicit assumption in this case is that the users understand that no exclusivity requirement is met in terms of placing application components.