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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.
Setting up resources in an enterprise domain
Adding Teracloud® Streams resources to an enterprise domain
To add more Teracloud® Streams resources to a domain, you must install and configure Teracloud Streams on the additional resources.
Verifying requirements for Teracloud® Streams resources
You can use the dependency checker script and streamtool commands to verify that Teracloud® Streams resources satisfy configuration and network connectivity requirements.

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 a domain host installation package
      You can use this procedure to create a domain host installation package that you can use to add Teracloud® Streams resources to the domain.
    - Adding Teracloud® Streams resources to an enterprise domain
      To add more Teracloud® Streams resources to a domain, you must install and configure Teracloud Streams on the additional resources.
      - Adding Teracloud® Streams resources by installing the domain host installation package
        Use this procedure to install and configure Teracloud® Streams on a resource that you are adding to a Teracloud Streams domain. This Readme file describes how to install and configure Teracloud Streams on a resource that you are adding to a Teracloud Streams domain. To reduce the product size requirement on the resource, the domain host installation package contains a subset of the Teracloud Streams files.
      - Adding Teracloud® Streams resources that already have the product installed
        If Teracloud® Streams is already installed on the resource or the main installation package is installed on a shared file system that is accessible by the resource, you can use this procedure to add the resource to a Teracloud Streams enterprise domain.
      - Verifying requirements for Teracloud® Streams resources
        You can use the dependency checker script and streamtool commands to verify that Teracloud® Streams resources satisfy configuration and network connectivity requirements.
  - 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 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.

Verifying requirements for Teracloud® Streams resources

You can use the dependency checker script and streamtool commands to verify that Teracloud® Streams resources satisfy configuration and network connectivity requirements.

Procedure

Run the dependency checker script on the hosts before they are added to domains or instances. Use the following command:
```
<install-dir>/bin/dependency_checker.sh
```
To check all the Teracloud® Streams resources in a domain, use the streamtool checkdomainhosts command.
To check all the Teracloud® Streams resources in an instance, use the streamtool checkinstancehosts command.
To check only the network configuration, specify the --connectivity-only option in any of these commands.