Model
Merge-on-read against copy-on-write
Write volume times unit size against read volume times merge work.
- Write rate
- changes per unit time
- Unit size
- size of the unit a copy-on-write must rewrite
- Read rate
- reads per unit time
- Merge cost
- cost each accumulated delta adds to a read
- Deltas
- the mean number of accumulated deltas
Where it appears
Each mechanism states it in its own names. The general symbol each name stands for is shown with it.
- Storage: Physical Organization
What should sit next to what, given that I must decide at write time and find out at read time?