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Installing
Use this information to install, upgrade, and uninstall the Teracloud® Streams product.
Planning to install Teracloud® Streams
To plan for installing Teracloud® Streams, start by reviewing the information in the planning roadmap.
Hardware requirements
Before you install Teracloud® Streams, ensure that the target system satisfies the minimum hardware 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.
- Planning to install Teracloud® Streams
  To plan for installing Teracloud® Streams, start by reviewing the information in the planning roadmap.
  - Preparing to install Teracloud® Streams
    Use the information in this topic to plan and prepare for your Teracloud® Streams installation. The plan that you create for your environment determines your tasks and choices throughout the installation process.
  - Considerations for environments with multiple resources
    Review these options and requirements for Teracloud® Streams environments before you install the product.
  - Hardware requirements
    Before you install Teracloud® Streams, ensure that the target system satisfies the minimum hardware requirements.
  - Software requirements
    Before you install Teracloud® Streams, run the dependency checker script to verify that the target system satisfies the product software requirements.
  - Domain controller service options
    A domain controller service runs on every resource in a Teracloud® Streams domain and manages all of the other services on that resource. You can set up the domain controller service as a registered Linux™ system service or an unregistered service.
  - Firewall configuration guidelines
    If firewall usage is required, the preferred configuration is to set up a firewall at the perimeter of the Teracloud® Streams cluster to restrict network access to resources in the cluster but not communication between the resources. When any communication passes through a firewall, latency is introduced. These guidelines apply to clients that are in the Teracloud Streams cluster as well as clients that are external to the cluster.
  - Linux ulimit configuration guidelines
    The default Linux™ user limit (ulimit) values might be too small for some Teracloud® Streams environments. Use these guidelines to ensure that your ulimit settings are sufficient for Teracloud Streams.
  - Name resolution requirements for resources
    All resources must satisfy the product network configuration requirements or Teracloud® Streams fails to start on the resource.
- Installing the Teracloud® Streams product
  Use these procedures to install Teracloud® Streams Version 7.2.
- Upgrading Teracloud® Streams
  Use these procedures to install a new version of Teracloud® Streams when a previous version of the product is already installed, or to update a Version 7.2 Non-Production Edition license.
- Uninstalling Teracloud® Streams
  Use this procedure to remove the Teracloud® Streams product from your system.
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.

Hardware requirements for Teracloud® Streams

Before you install Teracloud® Streams, ensure that the target system satisfies the minimum hardware requirements.

Table 1. Minimum hardware requirements for Teracloud® Streams
This table lists the system, display, memory, and disk space requirements for Teracloud® Streams.
Component	Minimum requirements	Comments
System	x86_64 (64-bit)	Teracloud® Streams supports Red Hat Enterprise Linux™ (RHEL).
Memory	2 GB	The amount of memory that is required by Teracloud® Streams is dependent on the applications that are developed and deployed. This minimum requirement is based on the memory requirements of the samples that are provided with the product.
Disk space	If installing the main installation package: 7 GB for the installation package and extraction 4 GB for the /tmp directory or other temporary directory, if specified by setting the IATEMPDIR environment variable. This space is cleaned up and available after the installation completes. 8.5 GB for the installation directory	Includes disk space required for installation and development resources only. Additional disk space is needed to run Teracloud® Streams. The amount depends on how you set up and configure your Teracloud® Streams environment. For more information about using the IATEMPDIR environment variable to configure a different temporary directory for installation processing, see the Preinstallation roadmap.
Disk space	If installing the domain host installation package or resource installation package: 1.2 GB for the installation package and extraction 400® MB for the /tmp directory or other temporary directory, if specified by setting the IATEMPDIR environment variable. This space is cleaned up and available after the installation completes. 1.5 GB for the installation directory