Storage Technology
Persistent storage is
- large, cheap, relatively slow, accessed in blocks
- used for long-term storage of data
Computational storage is
- small, expensive, fast, accessed by byte/word
- used for all analysis/calculation of data
Access cost HDD:RAM ≅ 100000:1, e.g.
- 10ms to read block containing two tuples
- 1µs to compare fields in two tuples
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