Parallel Database Extensions (PDE) is a software interface layer that lies between the operating system and Teradata Database. PDE supports the parallelism that gives Teradata Database its speed and linear scalability. PDE provides Teradata Database with the ability to:
- Run in a parallel environment
- Execute vprocs
- Manage and prioritize Teradata Database workloads
- Consistently manage memory, I/O, and messaging system interfaces across multiple OS platforms
PDE provides a series of parallel operating system services, which include:
- Facilities to manage parallel execution of database operations on multiple nodes.
- Dynamic distribution of database tasks.
- Coordination of task execution within and between nodes.
PDE enables MPP systems to take advantage of hardware features such as the BYNET and shared disk arrays.