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feat: async peerstore backed by datastores (#1058)

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We have a peerstore that keeps all data for all observed peers in memory with no eviction.

This is fine when you don't discover many peers but when using the DHT you encounter a significant number of peers so our peer storage grows and grows over time.

We have a persistent peer store, but it just periodically writes peers into the datastore to be read at startup, still keeping them in memory.

It also means a restart doesn't give you any temporary reprieve from the memory leak as the previously observed peer data is read into memory at startup.

This change refactors the peerstore to use a datastore by default, reading and writing peer info as it arrives.  It can be configured with a MemoryDatastore if desired.

It was necessary to change the peerstore and *book interfaces to be asynchronous since the datastore api is asynchronous.

BREAKING CHANGE: `libp2p.handle`, `libp2p.registrar.register` and the peerstore methods have become async
This commit is contained in:
Alex Potsides
2022-01-20 12:03:35 +00:00
committed by GitHub
parent 0a4dc54d08
commit 978eb3676f
94 changed files with 3263 additions and 4039 deletions
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6
test/metrics/index.spec.js
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@ -266,10 +266,10 @@ describe('Metrics', () => {
const metric = 'some-metric'
const value = 1
metrics.updateComponentMetric(component, metric, value)
metrics.updateComponentMetric({ component, metric, value })
expect(metrics.getComponentMetrics()).to.have.lengthOf(1)
expect(metrics.getComponentMetrics().get(component)).to.have.lengthOf(1)
expect(metrics.getComponentMetrics().get(component).get(metric)).to.equal(value)
expect(metrics.getComponentMetrics().get('libp2p').get(component)).to.have.lengthOf(1)
expect(metrics.getComponentMetrics().get('libp2p').get(component).get(metric)).to.equal(value)
})
})