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  4. VCSIPC (VCS Cluster Inter-Process Communication)

Glossary

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VCSIPC (VCS Cluster Inter-Process Communication)

VCSIPC defines the protocols and interfaces required for the RAC environment to transfer messages between instances. RAC Inter-Process Communications uses the VCSIPC shared library for interprocess communication. In turn, VCSIPC uses LMX, an LLT multiplexer, to provide fast data transfer between Oracle processes on different cluster nodes.