Simulation Database Evolution
VCD, WAL, WSF files ‘90
- Simple, Low overhead, Very slow access, Severe limitations
EARLY SIMULATION DATABASES ‘91
- Data sorted by signal, Reasonably fast waveform access
- No random access, High memory usage, Capacity problems
ADVANCED SIMULATION DATABASES ‘95
- Uses indexing, Allows random access, No compression
- Sluggish reading data (conversion from deamon - deamonless)
- No support for analog or cycle data, Synchronization problems
ISDB-2 ‘97
- Faster simulation, compressed files, fastest data access
- Built-in synchronized access: interactive and post-processing
ISDB-3 ‘99
- Random Access API - Efficient PPE
- Powerful Cross-Tool Communication