feat: add tiered-limit datastore #301
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SgtPooki
commented
Mar 11, 2024
| } | ||
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| async handleSizeForPut (key: Key, value: Uint8Array): Promise<void> { |
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cc @wemeetagain because this should be able to solve the needs of ChainSafe/lodestar@unstable/packages/beacon-node/src/network/peers/datastore.ts?rgh-link-date=2023-10-19T14%3A35%3A02Z#L71 |
SgtPooki
commented
Mar 11, 2024
| * keys are added to the end of the array when added or updated | ||
| * keys are removed from the start of the array when evicted | ||
| * Note: size of keys is not tracked, so if you have large keys, you should | ||
| * increase the maxBytes limit accordingly |
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Suggested change
| * increase the maxBytes limit accordingly | |
| * decrease the maxBytes limit accordingly |
SgtPooki
commented
Mar 11, 2024
| */ | ||
| private readonly evictionOrder: Key[] = [] | ||
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| constructor ({ maxBytes, store }: { maxBytes: number, store: T }, backingStore: T2) { |
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i'm not completely happy with these constructor args either...
SgtPooki
commented
Mar 11, 2024
| } | ||
| if (this.currentBytes + requiredSpace > this.maxBytes && this.evictionOrder.length > 0) { | ||
| log.trace('Evicting %d bytes from primary store to backing store', requiredSpace) | ||
| while (this.currentBytes + requiredSpace > this.maxBytes && this.evictionOrder.length > 0) { |
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we could probably be smarter here and use .batch()
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partially addresses #287
tiered-limit-blockstore to come when we agree upon the final design
some of my thoughts are in #287, but i'm not completely happy with the name "tiered-limit".. maybe "buffered-datastore" or "front-cache-datastore"
The idea behind this though, is that folks can do various kinds of combinations with other datastores. Some ideas: