You can provide high availability backup and failover support
by adding servers to support specific functions. For example, you
might want to set up several search servers to spread the query processing
load across processors.
You must install IBM® Content
Analytics with Enterprise Search on
the server that you want to add to the system topology before you
specify the purpose of the server in the administration console.
You
must ensure that all software that is needed to support the intended
server role is installed. For example, if you add a search server
and want to use WebSphere® Application
Server to
support your applications, you must ensure that a supported version
of WebSphere Application
Server is installed.
If
you add a high availability server, the high availability server and
the master server must share the same data directory (ES_NODE_ROOT).
The high availability servers are supported through IBM PowerHA® for AIX® and Microsoft Cluster Service (MSCS) on Windows.
The types of servers that you can add depends on how you
install the core components:
- Single server
- In a single server installation, you have one master controller
server. You can then add additional search servers and document processing
servers. On AIX or Windows platforms, you can also add one high
availability backup controller server to support crawling, indexing,
and search.
- Distributed servers
- In a distributed server installation, you have a master controller
server, a master crawler server, and at least one search server. You
can then add additional search servers and document processing servers.
On AIX or Windows platforms, you can also add one high
availability backup server to support crawling and one high availability
backup controller server to support indexing.
To add a server to the system and assign a role for how
the server is to be used:
- Verify that IBM Content
Analytics with Enterprise Search and
all required software is installed on the server that you want to
add, and verify that the new server is running. To add
the server, the system must be able to connect to it.
- Click System to open the System view.
- Click Add Server.
- On the Add a Server page, type the
fully qualified host name of the server that you want to add. Also
specify the common communication layer (CCL) port that you specified
for that server. The default value is 6002.
- Select the server role and click OK. The server that you added is shown in the system topology
and becomes available for processing requests on this system.
You can monitor the server status, start and stop the server,
or remove the server from the system topology. For a search server,
you can also view detailed statistics about query processing.
Restriction: After you add a server, you cannot change its host
name, port, or role. If you want to change the server configuration,
you must remove the server from the system topology and then add it
again.
