IBM InfoSphere Streams Version 4.1.1

Resource identifiers

A resource identifier uniquely identifies a resource in a domain or instance. For example, if you use the InfoSphere® Streams resource manager, it can be a host name or IP address.

All InfoSphere Streams resources in a domain must be able to resolve the host names for all other InfoSphere Streams resources in the domain.

The networking configuration of the InfoSphere Streams resources that you want to use in your domains determines how you must identify these hosts to InfoSphere Streams.

If the hosts have host names that are correctly registered in your domain name system (DNS) or /etc/hosts file, you can use their host names to identify the hosts to InfoSphere Streams. Cluster and server hosts typically fall into this category. You can specify short host names or fully qualified domain names.

If the hosts do not have host names that are registered in your DNS or /etc/hosts file, you must use IP addresses to identify the hosts. You cannot use a host's loopback address (127.*.*.*).

Important: If you use the host's dynamically assigned IP address in a domain, unpredictable results can occur when the host's IP address changes or the address is reassigned.