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exp/lighthorizon: Fix the single-process index builder data race. #4470

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merged 4 commits into from
Jul 21, 2022
Merged

exp/lighthorizon: Fix the single-process index builder data race. #4470

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91c62f5
"Fix" the data race by not doing any flushes until the end
Shaptic Jul 20, 2022
1309a2b
Create parallel_flush.go
sreuland Jul 21, 2022
2c33087
Add synchronization for the work submission routine. Thank you @sreul…
Shaptic Jul 21, 2022
c177e37
Merge branch 'lighthorizon_fixRace' of github.com:Shaptic/go into lig…
Shaptic Jul 21, 2022
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7 changes: 1 addition & 6 deletions exp/lighthorizon/index/builder.go
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Original file line number Diff line number Diff line change
Expand Up @@ -127,14 +127,9 @@ func BuildIndices(
}

nprocessed := atomic.AddUint64(&processed, uint64(count))
if nprocessed%19 == 0 {
if nprocessed%97 == 0 {
printProgress("Reading ledgers", nprocessed, uint64(ledgerCount), startTime)
}

// Upload indices once per checkpoint to save memory
if err := indexStore.Flush(); err != nil {
return errors.Wrap(err, "flushing indices failed")
}
}
return nil
})
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3 changes: 1 addition & 2 deletions exp/lighthorizon/index/connect.go
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,6 @@ import (
"fmt"
"net/url"
"path/filepath"
"runtime"

"github.com/aws/aws-sdk-go/aws"

Expand All @@ -17,7 +16,7 @@ func Connect(backendUrl string) (Store, error) {

func ConnectWithConfig(config StoreConfig) (Store, error) {
if config.Workers <= 0 {
config.Workers = uint32(runtime.NumCPU()) - 1
config.Workers = 1
}

parsed, err := url.Parse(config.Url)
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