Assigning host tags

The Lookup Manager application requires following host tags, where <lm-namespace> is the namespace of the Lookup Manager application:

<lm-namespace>_lookup_writer
<lm-namespace>_lookup_host_writer

The ITE application requires the following host tags with the <ite-namespace> being the namespace of the ITE application:

<ite-namespace>_ingest
<ite-namespace>_controller
<ite-namespace>_chain               (Variant A and B only)
<ite-namespace>_chain_<id>          (Variant C only)
<ite-namespace>_context_<id>        (Variant B and C only)

The core of the Lookup Manager application runs on the host that has the <lm-namespace>_lookup_writer host tag. The <lm-namespace>_lookup_host_writer host tag must be assigned to every host that must have access to the enrichment data that is stored in shared memory. Normally, you assign the <lm-namespace>_lookup_host_writer host tag to the hosts that run ITE jobs and have the ITE-related <ite-namespace>_chain_<id> or <ite-namespace>_chain host tags assigned.

The number of hosts that are specified in the global.multiHost.numberOfHosts parameter must be identical to the number of hosts that have the <namespace>_lookup_host_writer host tag assigned.

During their build process, Lookup Manager and ITE applications create a list of required host tags that is stored in the <project-base>/<application-folder>/config/hosttags.txt file. Assign these host tags to the appropriate hosts.

About this task

Assign host tags from the generated hosttags.txt files to the hosts of your cluster system.

Procedure

Example

You have an instance with <host_1>, <host_2>, and <host_3>:

streamtool chhost --add --tags <ite-namespace>_ingest,<ite-namespace>_controller,<lm-namespace>_lookup_writer <host_1>
streamtool chhost --add --tags <lm-namespace>_lookup_host_writer,<ite-namespace>_chain <host_2>
streamtool chhost --add --tags <lm-namespace>_lookup_host_writer,<ite-namespace>_chain <host_3>