Zannick/logic-graph
Replace rocksdb with relational database (eg sql) for queue and state db
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#222 aperta il 18 feb 2025
enhancementhelp wanted
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Descrizione
Having a relational database with indexes might be better for #141. The new structure I'm envisioning would keep the statedb and use that as the queue by way of indexes:
| Mode | state | progress | score | elapsed | remaining | hist | prev | next | in-memory-queue | won |
|---|---|---|---|---|---|---|---|---|---|---|
| lookup | = x | |||||||||
| insert | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... |
| update | = x | set min | set | set | set | set | ||||
| process | = x | set | set false | |||||||
| evict | = x | set true | ||||||||
| retrieve | = x | sort | sort | sort | = false, set true | |||||
| recover | set false if true | |||||||||
| solutions | sort | = true |
- Our statedb lookups are for data at the primary key (state).
- As we process states, we insert the new states (or update the ones we've found faster routes to), and update the processed states with the
nextsteps. - Evicting from the in-memory-queue simply flips the bit.
- Retrieving states looks for states with the in-memory-queue bit set to false (and then sets them to true)
- On recovery, we can either retrieve all the elements marked as being in the memory queue, or set them all back to false and perform a retrieve.
- And we can retrieve solutions directly on recovery as well.