RabbitMQ is an AMQP messaging system that is responsible for internal communication between the components of one OpenStack service, for example between nova-compute and nova-api.
OpenStack Rally is a benchmarking tool that enables cloud administrators to monitor the cloud infrastructure to enhance cloud performance. Rally automates and unifies multi-node OpenStack deployment, cloud verification, benchmarking, and profiling. You can run Rally against an established OpenStack environment to identify functional failures and performance bottlenecks.
Remote direct memory access (RDMA) is a technology that enables computers to read and write data from remote server without involving the CPU. RDMA helps to reduce latency and increase throughput by freeing up the CPU to perform other tasks.
Remote desktop protocol (RDP) is a computer protocol that provides a user with access to a remote system over the network.
A region is a physical separation of OpenStack resources bound by latency. (Region in this context is defined at a higher level than Nova’s definition of region.
A process used by Pacemaker to interact with applications. Pacemaker includes native resource agents that are used in OpenStack high-availability deployments such as those that manage the MySQL databases or virtual IP addresses. Pacemaker also supports third party RAs, such as the one that manages RabbitMQ, and native OpenStack RAs, such as those that manage the OpenStack Identity and Image services.
A functional set of services that Fuel installs as a whole on a node.
Fuel can deploy the following roles: