Storage Technology (cont)
Comparison of HDD and SSD properties:
| | HDD | SDD |
| Cost/byte |
~ 2c / GB
| ~ 13c / GB |
| Read latency |
~ 10ms |
~ 50µs |
| Write latency |
~ 10ms |
~ 900µs |
| Read unit |
block (e.g. 1KB) |
byte |
| Writing |
write a block |
write on empty block |
Will SSDs ever replace HDDs for large-scale database storage?
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