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Configuring
Create a basic or an enterprise domain which is a single point for configuring and managing common resources, security, and instances.
Setting up an enterprise domain on multiple resources
An enterprise domain can have multiple resources and users. This type of domain is typically used for production environments. You can configure high availability to ensure that Teracloud® Streams can continue to run even if resources fail or are not available.
Configuring high availability in an enterprise domain
Both domains and instances have a high availability count property. This property indicates how many copies of management services are maintained by a domain, instance, or application repository. The extra copies (standby services) allow for automatic failover if resources unexpectedly fail or become unavailable.

Welcome
Learn about the core capabilities of Teracloud® Streams, its architecture, and key concepts.
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.
- Setting up a basic domain on a single resource
  A basic domain has a single Teracloud® Streams resource and user. This type of domain is typically used for test or development environments.
- Setting up an enterprise domain on multiple resources
  An enterprise domain can have multiple resources and users. This type of domain is typically used for production environments. You can configure high availability to ensure that Teracloud® Streams can continue to run even if resources fail or are not available.
  - Prerequisites
    Before you create an enterprise domain, you must set up an external ZooKeeper server for managing Teracloud® Streams. You can set up either LDAP or PAM to use as the default user authentication method for the domain.
  - Creating an enterprise domain
    You can create an enterprise domain by using the Teracloud® Streams graphical user interfaces or the streamtool command-line interface.
  - Setting up resources in an enterprise domain
  - Creating an instance in an enterprise domain
    You can create an instance by using the Streams Console or the streamtool command-line interface.
  - Configuring an instance to use dynamic resource allocation
    You can configure an instance to dynamically allocate resources depending on the needs of the job. When a job is submitted, resources are acquired from the domain to support these jobs and are released when they are no longer needed.
  - Adding resources to instances
    You can assign resources to an instance statically when you create the instance or dynamically after the instance is created. The resources are allocated to the instance from the pool of resources in the domain.
  - Configuring high availability in an enterprise domain
    Both domains and instances have a high availability count property. This property indicates how many copies of management services are maintained by a domain, instance, or application repository. The extra copies (standby services) allow for automatic failover if resources unexpectedly fail or become unavailable.
    - Configuring domains
      If you configure high availability for the management services in a domain, Teracloud® Streams can switch to using standby services in the event of a software, hardware, or network interruption.
    - Configuring instances
      If you configure high availability for the management services in an instance, Teracloud® Streams can switch to using standby services in the event of a software, hardware, or network interruption.
    - Configuring application repositories
      If you configure high availability for an application repository, this application repository should be hosted on highly available storage. You can set the application repository at the domain level or at an individual instance level. If you configure high availability for an instance, this instance level setting takes priority over the domain level setting.
- Configuring security
  Each Teracloud® Streams domain and instance maintains its own security configuration.
- Configuring audit logging
  Teracloud® Streams supports comprehensive, multiple-level auditing of product and user operations. By default, audit logging is not enabled.
- Configuring transport mechanisms
  Teracloud® Streams supports several high-performance and configurable transport mechanisms for communicating across processing elements (PEs). You can configure the transport mechanism by updating Teracloud Streams properties.
- Configuring a checkpoint data store
  Use this procedure to configure a checkpoint data store for Teracloud® Streams domains 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.

Configuring high availability for Teracloud® Streams enterprise domains, instances, and application repositories

Both domains and instances have a high availability count property. This property indicates how many copies of management services are maintained by a domain, instance, or application repository. The extra copies (standby services) allow for automatic failover if resources unexpectedly fail or become unavailable.