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storage: many more adapters; a new filesystem storage implementation;…
… benchmark helper functions; and actual benchmark tables, runnable, which compare several storage implementations.
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| benchmarks | ||
| ========== | ||
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| This is a small module that pulls in a bunch of storage implementations, | ||
| as well as legacy implementations via the adapter modules, | ||
| and benchmarks all of them on the same benchmarks. | ||
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| There's no reason to import this code, | ||
| so the go.mod file uses relative paths shamelessly. | ||
| (You can create your own benchmarks using the code in `../tests`, | ||
| which contains most of the engine; this package is just tables of setup.) | ||
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| What variations do the benchmarks exercise? | ||
| ------------------------------------------ | ||
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| - the various storage implementations! | ||
| - in some cases: variations of parameters to individual storage implementations. | ||
| - various distributions of data size. | ||
| - block mode vs streaming mode. | ||
| - end-to-end use via linksystem with small cbor objects. | ||
| - (this measures a lot of things that aren't to do with the storage itself -- but is useful to contextualize things.) | ||
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| Running the benchmarks on variations in hardware and filesystem may also be important! | ||
| Many of these storage systems use the disk in some way. | ||
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| Why is the module structured like this? | ||
| ---------------------------------------- | ||
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| See similar discussion in the `../dsadapter` module. | ||
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| Long story short: to keep legacy dependencies from appearing in modern dependency trees, | ||
| even though we want to test them, and want to do it without spawning yet more git repos. | ||
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| It may be worth pulling this out into a new git repo in the future, | ||
| especially if we want to add more and more implementations to what we benchmark, | ||
| or develop additional tools for deploying the benchmark on varying hardware, etc. | ||
| For now, it incubates here. |
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| module github.com/ipld/go-ipld-prime/storage/benchmarks | ||
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| go 1.16 | ||
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| replace github.com/ipld/go-ipld-prime => ../.. | ||
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| replace github.com/ipld/go-ipld-prime/storage/dsadapter => ../dsadapter | ||
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| require ( | ||
| github.com/ipfs/go-ds-flatfs v0.4.5 | ||
| github.com/ipld/go-ipld-prime v0.12.3 | ||
| github.com/ipld/go-ipld-prime/storage/dsadapter v0.0.0-20211022093231-ebf675a9bd6d | ||
| ) |
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| github.com/alexbrainman/goissue34681 v0.0.0-20191006012335-3fc7a47baff5 h1:iW0a5ljuFxkLGPNem5Ui+KBjFJzKg4Fv2fnxe4dvzpM= | ||
| github.com/alexbrainman/goissue34681 v0.0.0-20191006012335-3fc7a47baff5/go.mod h1:Y2QMoi1vgtOIfc+6DhrMOGkLoGzqSV2rKp4Sm+opsyA= | ||
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| github.com/frankban/quicktest v1.14.0/go.mod h1:NeW+ay9A/U67EYXNFA1nPE8e/tnQv/09mUdL/ijj8og= | ||
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| golang.org/x/tools v0.0.0-20190621195816-6e04913cbbac/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc= | ||
| golang.org/x/tools v0.0.0-20191029041327-9cc4af7d6b2c/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo= | ||
| golang.org/x/tools v0.0.0-20191029190741-b9c20aec41a5 h1:hKsoRgsbwY1NafxrwTs+k64bikrLBkAgPir1TNCj3Zs= | ||
| golang.org/x/tools v0.0.0-20191029190741-b9c20aec41a5/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo= | ||
| golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= | ||
| golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= | ||
| gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= | ||
| gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= | ||
| gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo= | ||
| gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= | ||
| gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI= | ||
| gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= | ||
| gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY= | ||
| gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ= | ||
| honnef.co/go/tools v0.0.1-2019.2.3 h1:3JgtbtFHMiCmsznwGVTUWbgGov+pVqnlf1dEJTNAXeM= | ||
| honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg= |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,93 @@ | ||
| package benchmarks | ||
|
|
||
| import ( | ||
| "encoding/base32" | ||
| "fmt" | ||
| "io/ioutil" | ||
| "os" | ||
| "testing" | ||
|
|
||
| flatfs "github.com/ipfs/go-ds-flatfs" | ||
| "github.com/ipld/go-ipld-prime/storage" | ||
| "github.com/ipld/go-ipld-prime/storage/dsadapter" | ||
| "github.com/ipld/go-ipld-prime/storage/fsstore" | ||
| "github.com/ipld/go-ipld-prime/storage/memstore" | ||
| "github.com/ipld/go-ipld-prime/storage/tests" | ||
| ) | ||
|
|
||
| func BenchmarkPut(b *testing.B) { | ||
| // - memstore | ||
| // - dsadapter with flatfs | ||
| // - bsrvadapter wrapped around that (todo) | ||
| // - fsstore | ||
| tt := []struct { | ||
| storeName string // used in test name | ||
| storeConstructor func() storage.WritableStorage | ||
| }{{ | ||
| storeName: "memstore", | ||
| storeConstructor: func() storage.WritableStorage { | ||
| return &memstore.Store{} | ||
| }, | ||
| }, { | ||
| storeName: "dsadapter-flatfs-base32-defaultshard", | ||
| storeConstructor: func() storage.WritableStorage { | ||
| shardFn, err := flatfs.ParseShardFunc("/repo/flatfs/shard/v1/next-to-last/3") | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| ds, err := flatfs.CreateOrOpen(".", shardFn, false) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| return &dsadapter.Adapter{ | ||
| Wrapped: ds, | ||
| EscapingFunc: func(raw string) string { | ||
| return base32.StdEncoding.WithPadding(base32.NoPadding).EncodeToString([]byte(raw)) | ||
| }, | ||
| } | ||
| }, | ||
| }, { | ||
| storeName: "fsstore-base32-defaultshard", | ||
| storeConstructor: func() storage.WritableStorage { | ||
| store := &fsstore.Store{} | ||
| if err := store.InitDefaults("."); err != nil { | ||
| panic(err) | ||
| } | ||
| return store | ||
| }, | ||
| }} | ||
| for _, ttr := range tt { | ||
| b.Run(ttr.storeName, func(b *testing.B) { | ||
| for _, scale := range []int{ | ||
| 1 << 8, // probably too small to be useful; b.N will always be much bigger than this. | ||
| 1 << 12, | ||
| 1 << 16, | ||
| //1 << 20, // already getting too big to fit the setup phase into the default benchmark time windows when using disk storage. | ||
| //1 << 24, | ||
| } { | ||
| b.Run(fmt.Sprintf("scale=%d", scale), func(b *testing.B) { | ||
| // Make a tempdir. Change cwd to it. | ||
| // We'll assume the storage system, if it needs filesystem, can use the cwd. | ||
| dir, err := ioutil.TempDir("", "storagebench") | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| defer os.RemoveAll(dir) | ||
| retreat, err := os.Getwd() | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| defer os.Chdir(retreat) | ||
| if err := os.Chdir(dir); err != nil { | ||
| panic(err) | ||
| } | ||
|
|
||
| // Create the store, and put it to work! | ||
| store := ttr.storeConstructor() | ||
| gen := tests.NewCounterGen(1000000) // Use a large enough number that any sharding function kicks in (e.g. the b10 string is >=7 chars). | ||
| tests.BenchPut(b, store, gen, scale) | ||
| }) | ||
| } | ||
| }) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,48 @@ | ||
| bsadapter | ||
| ========= | ||
|
|
||
| The `bsadapter` package/module is a small piece of glue code to connect | ||
| the `github.com/ipfs/go-blockstore` package, and packages implementing its interfaces, | ||
| forward into the `go-ipld-prime/storage` interfaces. | ||
|
|
||
|
|
||
| Why structured like this? | ||
| ------------------------- | ||
|
|
||
| See similar discussion in the `../dsadapter` module. | ||
|
|
||
|
|
||
| Which of `dsadapter` vs `bsadapter` vs `bsrvadapter` should I use? | ||
| ------------------------------------------------------------------ | ||
|
|
||
| None of them, ideally. | ||
| A direct implementation of the storage APIs will almost certainly be able to perform better than any of these adapters. | ||
|
|
||
| Failing that: use the adapter matching whatever you've got on hand in your code. | ||
|
|
||
| There is no correct choice. | ||
|
|
||
| dsadapter suffers avoidable excessive allocs in processing its key type, | ||
| due to choices in the interior of `github.com/ipfs/go-datastore`. | ||
| It is also unable to support streaming operation, should you desire it. | ||
|
|
||
| bsadapter and bsrvadapter both also suffer overhead due to their key type, | ||
| because they require a transformation back from the plain binary strings used in the storage API to the concrete go-cid type, | ||
| which spends some avoidable CPU time (and also, at present, causes avoidable allocs because of some interesting absenses in `go-cid`). | ||
| Additionally, they suffer avoidable allocs because they wrap the raw binary data in a "block" type, | ||
| which is an interface, and thus heap-escapes; and we need none of that in the storage APIs, and just return the raw data. | ||
| They are also unable to support streaming operation, should you desire it. | ||
|
|
||
| It's best to choose the shortest path and use the adapter to whatever layer you need to get to -- | ||
| for example, if you really want to use a `go-datastore` implementation, | ||
| *don't* use `bsadapter` and have it wrap a `go-blockstore` that wraps a `go-datastore` if you can help it: | ||
| instead, use `dsadapter` and wrap the `go-datastore` without any extra layers of indirection. | ||
| You should prefer this because most of the notes above about avoidable allocs are true when | ||
| the legacy interfaces are communicating with each other, as well... | ||
| so the less you use the internal layering of the legacy interfaces, the better off you'll be. | ||
|
|
||
| Using a direct implementation of the storage APIs will suffer none of these overheads, | ||
| and so will always be your best bet if possible. | ||
|
|
||
| If you have to use one of these adapters, hopefully the performance overheads fall within an acceptable margin. | ||
| If not: we'll be overjoyed to accept help porting things. |
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