Parallel Databases (PDBs)
Parallel databases provide various forms of parallelism ...
- process parallelism can speed up query evaluation
- processor parallelism can assist in speeding up memory ops
- processor parallelism introduces cache coherence issues
- disk parallelism can assist in overcoming latency
- disk parallelism can be used to improve fault-tolerance (RAID)
- one limiting factor is congestion on communication bus
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