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== Infrastructure ==
The [[database]] system that ClearCase uses is [[RDM Embedded]] from Raima. In ClearCase terminology, an individual database is called a ''VOB'' ('''V'''ersioned '''O'''bject '''B'''ase). On this layer, maintenance takes place using Raima tooling. Around this layer, a set of interfaces with accompanying tools are used to manage the physical database system, which requires specific [[Database administrator]] skills.▼
▲. In ClearCase terminology, an individual database is called a ''VOB'' ('''V'''ersioned '''O'''bject '''B'''ase). On this layer, maintenance takes place using Raima tooling. Around this layer, a set of interfaces with accompanying tools are used to manage the physical database system, which requires specific [[Database administrator]] skills.
The most important service is the Atria ___location Broker Daemon (ALBD), which manages all (LAN) communication between computers. Beginning with version 7, the server platform runs Websphere Application Server with a server application called the Change Management Server (CM Server), which served ClearCase clients via the HTTP Protocol. (Before version 7 there was a web service by which users could access ClearCase via their browsers.) CM server has since been replaced by the ClearCase Remote Client Wide-Area Network Server (CCRC WAN server), which continues to be based on Websphere Application Server.
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