Ideally, each server accesses a different set of databases. Multiple servers can share access to a common set of databases—provided you are willing to manually keep the settings of all the installations in sync. Different groups in your organization can then access the common databases through different servers, spreading the load among them.
Install the software on each of the servers that you want to access the common databases. Each installation must:
Additionally, when you add a common database during installation or later through the
tab, its path must match exactly, including capitalization, across all installations.At this time, designate a single one of your installations as the primary server for the common databases. All other installations are secondary servers. Rational Change does not distinguish primary and secondary servers. You must change the settings that require manual synchronization.
If you are using central server configuration, you can use the same set of remote servers across multiple central servers. Doing so achieves load balancing at the central server level, but uses the same set of servers to serve task requests. Alternatively, you can have a duplicate set (parallel set) of remote servers for each central server, which also achieves load balancing at the remote server level. However, this configuration is more heavy weight and requires administration of more remote servers.
For more information, see Settings requiring manual synchronization.
IBM Rational Synergy has a number of features that interact with IBM Rational Change. These features continue to work, but Rational Synergy recognizes the last Rational Change installation on which you installed your process package. All users are connected to the same Rational Change server.
By default, each server maintains its own search index. Since the indexes are not necessarily updated at the same time, different servers might show different results. These rules apply only to search results. Queries and reports always reflect what is currently in your databases.
It is possible to have multiple Rational Change servers configured against the same databases to share a search index. Set the pt.cfg configuration entry [CCM_SYSTEM][SEARCH_INDEX_DIRECTORY]full path to search directory [/SEARCH_INDEX_DIRECTORY][/CCM_SYSTEM] to have the same path on all servers. The default value for the search index is the CHANGE_APP_HOME/WEB-INF/wsconfig/search directory.
Do not point to CHANGE_APP_HOME/WEB-INF/wsconfig/search/index. Doing so creates another index.
Using multiple servers does not affect your licenses. The same number of licenses are available whether you use one or more IBM Rational Change installations.