Datastore copy util #469
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,127 @@ | ||
| package main | ||
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| import ( | ||
| "context" | ||
| "net/url" | ||
| "os" | ||
|
|
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| ds "github.com/ipfs/go-datastore" | ||
| "github.com/ipfs/go-datastore/query" | ||
| logging "github.com/ipfs/go-log/v2" | ||
| "github.com/namsral/flag" | ||
| badger "github.com/textileio/go-ds-badger" | ||
| mongods "github.com/textileio/go-ds-mongo" | ||
| ) | ||
|
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| var log = logging.Logger("ds-copy") | ||
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| func main() { | ||
| fs := flag.NewFlagSet(os.Args[0], 0) | ||
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| fromBadgerRepo := fs.String("fromBadgerRepo", "", "Source badger repo path") | ||
| toBadgerRepo := fs.String("toBadgerRepo", "", "Destination badger repo path") | ||
|
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| fromMongoUri := fs.String("fromMongoUri", "", "Source MongoDB URI") | ||
| fromMongoDatabase := fs.String("fromMongoDatabase", "", "Source MongoDB database") | ||
| fromMongoCollection := fs.String("fromMongoCollection", "", "Source MongoDB collection") | ||
| toMongoUri := fs.String("toMongoUri", "", "Destination MongoDB URI") | ||
| toMongoDatabase := fs.String("toMongoDatabase", "", "Destination MongoDB database") | ||
| toMongoCollection := fs.String("toMongoCollection", "", "Destination MongoDB collection") | ||
|
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| verbose := fs.Bool("verbose", false, "More verbose output") | ||
| if err := fs.Parse(os.Args[1:]); err != nil { | ||
| log.Fatal(err) | ||
| } | ||
|
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| logging.SetupLogging(logging.Config{ | ||
| Format: logging.ColorizedOutput, | ||
| Stderr: true, | ||
| Level: logging.LevelError, | ||
| }) | ||
| if err := logging.SetLogLevel("ds-copy", "info"); err != nil { | ||
| log.Fatal(err) | ||
| } | ||
|
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| if len(*fromBadgerRepo) != 0 && len(*fromMongoUri) != 0 { | ||
| log.Fatal("multiple sources specified") | ||
| } | ||
| if len(*fromBadgerRepo) == 0 && len(*fromMongoUri) == 0 { | ||
| log.Fatal("source not specified") | ||
| } | ||
| if len(*toBadgerRepo) != 0 && len(*toMongoUri) != 0 { | ||
| log.Fatal("multiple destinations specified") | ||
| } | ||
| if len(*toBadgerRepo) == 0 && len(*toMongoUri) == 0 { | ||
| log.Fatal("destination not specified") | ||
| } | ||
|
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| var from, to ds.Datastore | ||
| var err error | ||
| if len(*fromBadgerRepo) != 0 { | ||
| from, err = badger.NewDatastore(*fromBadgerRepo, &badger.DefaultOptions) | ||
| if err != nil { | ||
| log.Fatalf("connecting to badger source: %v", err) | ||
| } | ||
| log.Infof("connected to badger source: %s", *fromBadgerRepo) | ||
| } | ||
| if len(*toBadgerRepo) != 0 { | ||
| to, err = badger.NewDatastore(*toBadgerRepo, &badger.DefaultOptions) | ||
| if err != nil { | ||
| log.Fatalf("connecting to badger destination: %v", err) | ||
| } | ||
| log.Infof("connected to badger destination: %s", *toBadgerRepo) | ||
| } | ||
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| ctx, cancel := context.WithCancel(context.Background()) | ||
| defer cancel() | ||
| if len(*fromMongoUri) != 0 { | ||
| uri, err := url.Parse(*fromMongoUri) | ||
| if err != nil { | ||
| log.Fatalf("parsing source mongo URI: %v", err) | ||
| } | ||
| if len(*fromMongoDatabase) == 0 { | ||
| log.Fatal("source mongo database not specified") | ||
| } | ||
| if len(*fromMongoCollection) == 0 { | ||
| log.Fatal("source mongo collection not specified") | ||
| } | ||
| from, err = mongods.New(ctx, *fromMongoUri, *fromMongoDatabase, mongods.WithCollName(*fromMongoCollection)) | ||
| if err != nil { | ||
| log.Fatalf("connecting to mongo source: %v", err) | ||
| } | ||
| log.Infof("connected to mongo source: %s", uri.Redacted()) | ||
| } | ||
| if len(*toMongoUri) != 0 { | ||
| uri, err := url.Parse(*toMongoUri) | ||
| if err != nil { | ||
| log.Fatalf("parsing destination mongo URI: %v", err) | ||
| } | ||
| if len(*toMongoDatabase) == 0 { | ||
| log.Fatal("destination mongo database not specified") | ||
| } | ||
| if len(*toMongoCollection) == 0 { | ||
| log.Fatal("destination mongo collection not specified") | ||
| } | ||
| to, err = mongods.New(ctx, *toMongoUri, *toMongoDatabase, mongods.WithCollName(*toMongoCollection)) | ||
| if err != nil { | ||
| log.Fatalf("connecting to mongo destination: %v", err) | ||
| } | ||
| log.Infof("connected to mongo destination: %s", uri.Redacted()) | ||
| } | ||
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| results, err := from.Query(query.Query{}) | ||
| if err != nil { | ||
| log.Fatalf("querying source: %v", err) | ||
| } | ||
| defer results.Close() | ||
| for r := range results.Next() { | ||
| if err := to.Put(ds.NewKey(r.Key), r.Value); err != nil { | ||
| log.Fatalf("copying %s: %v", r.Key, err) | ||
| } | ||
|
There was a problem hiding this comment. I discovered while working and testing Powergate migrations that this is too slow for copying (at least for my taste). Here is what I did for migrations; which reduced times by some orders of magnitude. Nothing crazy, ignoring the migration logic, basically some rate-limiting to Read-and-Put up to 1000 in concurrently instead of serially. There was a problem hiding this comment. Nice, copied your approach there |
||
| if *verbose { | ||
| log.Infof("copied %s", r.Key) | ||
| } | ||
| } | ||
|
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| log.Info("done") | ||
| } | ||
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Between these two lines we need to add:
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Ah yeah, thanks!