diff --git a/storage/internal/benchmarks/README.md b/storage/internal/benchmarks/README.md
new file mode 100644
index 000000000000..fbb9e34d5e9a
--- /dev/null
+++ b/storage/internal/benchmarks/README.md
@@ -0,0 +1,45 @@
+# go-bench-gcs
+**This is not an officially supported Google product**
+
+## Run example:
+This runs 1000 iterations on 512kib to 2Gib files in the background, sending output to `out.log`:
+
+`go run main -p {PROJECT_ID} -t 72h -max_samples 1000 -o {RESULTS_FILE_NAME}.csv &> out.log &`
+
+
+## CLI parameters
+
+| Parameter | Description | Possible values | Default |
+| --------- | ----------- | --------------- |:-------:|
+| -p | projectID | a project ID | * |
+| -creds | path to credentials file | any path | from environment |
+| -o | file to output results to
if empty, will output to stdout | any file path | stdout |
+| -output_type | output results as csv records or cloud monitoring | `csv`, `cloud-monitoring` | `cloud-monitoring` |
+| -api | which API to use | `JSON`: use JSON to upload and XML to download
`XML`: use JSON to upload and XML to download
`GRPC`: use GRPC
`MIXED`: select an API at random for each upload/download
`DirectPath`: use GRPC with direct path | `MIXED` |
+| -r | bucket region for benchmarks | any GCS region | `US-WEST1` |
+| -workers | number of goroutines to run at once; set to 1 for no concurrency | any positive integer | `16` |
+| -t | timeout (maximum time running benchmarks)
the program may run for longer while it finishes running processes | any [time.Duration](https://pkg.go.dev/time#Duration) | `1h` |
+| -min_samples | minimum number of objects to upload | any positive integer | `10` |
+| -max_samples | maximum number of objects to upload | any positive integer | `10 000` |
+| -gc_f | whether to force garbage collection
before every write or read benchmark | `true` or `false` (present/not present) | `false` |
+| -min_size | minimum object size in bytes | any positive integer | `512` |
+| -max_size | maximum object size in bytes | any positive integer | `2 097 152` (2 GiB) |
+| -defaults | use default settings for the client
(conn_pool, read, write and chunk size parameters will be ignored) | `true` or `false` | `false`
+| -conn_pool | GRPC connection pool size | any positive integer | 4 |
+| -min_cs | minimum ChunkSize in bytes | any positive integer | `16 384` (16 MiB) |
+| -max_cs | maximum ChunkSize in bytes | any positive integer | `16 384` (16 MiB) |
+| -q_read | download quantum | any positive integer | 1 |
+| -q_write | upload quantum | any positive integer | 1 |
+| -min_r_size | minimum read size in bytes | any positive integer | `4000` |
+| -max_r_size | maximum read size in bytes | any positive integer | `4000` |
+| -min_w_size | minimum write size in bytes | any positive integer | `4000` |
+| -max_w_size | maximum write size in bytes | any positive integer | `4000` |
+| -labels | labels added to cloud monitoring output (ignored when outputting as csv) | any string; should be in the format:
`stringKey=\"value\",intKey=3,boolKey=true` | empty |
+
+\* required values
+
+Note: while the default read/write size for HTTP clients is 4Kb
+(the default for this benchmarking), the default for GRPC is 32Kb.
+If you want to capture performance using the defaults for GRPC run the script
+separately setting the read and write sizes to 32Kb, or run with the `defaults`
+parameter set.
\ No newline at end of file
diff --git a/storage/internal/benchmarks/client_pool.go b/storage/internal/benchmarks/client_pool.go
new file mode 100644
index 000000000000..56ea0663d4fc
--- /dev/null
+++ b/storage/internal/benchmarks/client_pool.go
@@ -0,0 +1,221 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+import (
+ "context"
+ "fmt"
+ "log"
+ "net"
+ "net/http"
+ "os"
+ "sync"
+ "time"
+
+ "cloud.google.com/go/storage"
+ "golang.org/x/net/http2"
+ "google.golang.org/api/option"
+ htransport "google.golang.org/api/transport/http"
+ "google.golang.org/grpc"
+)
+
+// clientPool functions much like a sync Pool (https://pkg.go.dev/sync#Pool),
+// except it does not automatically remove items stored in the clientPool.
+// Re-using the clients rather than creating a new one each time reduces overhead
+// (such as re-creating the underlying HTTP client and opening credential files),
+// and is the intended way to use Storage clients.
+//
+// There is no limit to how many clients will be created, but it should be around
+// the order of 5 * min(workers, max_samples).
+type clientPool struct {
+ New func() *storage.Client
+ clients []*storage.Client
+}
+
+func (p *clientPool) Get() *storage.Client {
+ // Create the slice if not already created
+ if p.clients == nil {
+ p.clients = make([]*storage.Client, 0)
+ }
+
+ // If there is an unused client, return it
+ if len(p.clients) > 0 {
+ c := p.clients[0]
+ p.clients = p.clients[1:]
+ return c
+ }
+
+ // Otherwise, create a new client and return it
+ return p.New()
+}
+
+func (p *clientPool) Put(c *storage.Client) {
+ p.clients = append(p.clients, c)
+}
+
+// we can share clients as long as the app buffer sizes are constant
+var httpClients, gRPCClients *clientPool
+
+var nonBenchmarkingClients = clientPool{
+ New: func() *storage.Client {
+ // For debuggability's sake, these are HTTP
+ clientMu.Lock()
+ client, err := storage.NewClient(context.Background())
+ clientMu.Unlock()
+ if err != nil {
+ log.Fatalf("storage.NewClient: %v", err)
+ }
+
+ return client
+ },
+}
+
+func initializeClientPools(opts *benchmarkOptions) func() {
+ httpClients = &clientPool{
+ New: func() *storage.Client {
+ client, err := initializeHTTPClient(context.Background(), opts.minWriteSize, opts.maxReadSize, opts.useDefaults)
+ if err != nil {
+ log.Fatalf("initializeHTTPClient: %v", err)
+ }
+
+ return client
+ },
+ }
+
+ gRPCClients = &clientPool{
+ New: func() *storage.Client {
+ client, err := initializeGRPCClient(context.Background(), opts.minWriteSize, opts.maxReadSize, opts.connPoolSize, opts.useDefaults)
+ if err != nil {
+ log.Fatalf("initializeGRPCClient: %v", err)
+ }
+ return client
+ },
+ }
+
+ return func() {
+ for _, c := range httpClients.clients {
+ c.Close()
+ }
+ for _, c := range gRPCClients.clients {
+ c.Close()
+ }
+ }
+}
+
+// We can't pool storage clients if we need to change parameters at the HTTP or GRPC client level,
+// since we can't access those after creation as it is set up now.
+// If we are using defaults (ie. not creating an underlying HTTP client ourselves), or if
+// we are only interested in one app buffer size at a time, we don't need to change anything on the underlying
+// client and can re-use it (and therefore the storage client) for other benchmark runs.
+func canUseClientPool(opts *benchmarkOptions) bool {
+ return opts.useDefaults || (opts.maxReadSize == opts.minReadSize && opts.maxWriteSize == opts.minWriteSize)
+}
+
+func getClient(ctx context.Context, opts *benchmarkOptions, br benchmarkResult) (*storage.Client, func() error, error) {
+ noOp := func() error { return nil }
+ grpc := br.params.api == grpcAPI || br.params.api == directPath
+ if canUseClientPool(opts) {
+ if grpc {
+ c := gRPCClients.Get()
+ return c, func() error { gRPCClients.Put(c); return nil }, nil
+ }
+ c := httpClients.Get()
+ return c, func() error { httpClients.Put(c); return nil }, nil
+ }
+
+ // if necessary, create a client
+ if grpc {
+ c, err := initializeGRPCClient(ctx, br.params.appBufferSize, br.params.appBufferSize, opts.connPoolSize, false)
+ if err != nil {
+ return nil, noOp, fmt.Errorf("initializeGRPCClient: %w", err)
+ }
+ return c, c.Close, nil
+ }
+ c, err := initializeHTTPClient(ctx, br.params.appBufferSize, br.params.appBufferSize, false)
+ if err != nil {
+ return nil, noOp, fmt.Errorf("initializeHTTPClient: %w", err)
+ }
+ return c, c.Close, nil
+}
+
+// mutex on starting a client so that we can set an env variable for GRPC clients
+var clientMu sync.Mutex
+
+func initializeHTTPClient(ctx context.Context, writeBufferSize, readBufferSize int, useDefaults bool) (*storage.Client, error) {
+ if useDefaults {
+ clientMu.Lock()
+ c, err := storage.NewClient(ctx, option.WithCredentialsFile(credentialsFile))
+ clientMu.Unlock()
+ return c, err
+ }
+
+ dialer := &net.Dialer{
+ Timeout: 30 * time.Second,
+ KeepAlive: 30 * time.Second,
+ }
+
+ // These are the default parameters with write and read buffer sizes modified
+ base := &http.Transport{
+ Proxy: http.ProxyFromEnvironment,
+ DialContext: dialer.DialContext,
+ ForceAttemptHTTP2: true,
+ MaxIdleConns: 100,
+ IdleConnTimeout: 90 * time.Second,
+ TLSHandshakeTimeout: 10 * time.Second,
+ ExpectContinueTimeout: 1 * time.Second,
+ WriteBufferSize: writeBufferSize,
+ ReadBufferSize: readBufferSize,
+ }
+
+ http2Trans, err := http2.ConfigureTransports(base)
+ if err == nil {
+ http2Trans.ReadIdleTimeout = time.Second * 31
+ }
+
+ trans, err := htransport.NewTransport(ctx, base,
+ option.WithScopes("https://www.googleapis.com/auth/devstorage.full_control"),
+ option.WithCredentialsFile(credentialsFile))
+ if err != nil {
+ return nil, err
+ }
+
+ clientMu.Lock()
+ client, err := storage.NewClient(ctx, option.WithHTTPClient(&http.Client{Transport: trans}))
+ clientMu.Unlock()
+
+ return client, err
+}
+
+func initializeGRPCClient(ctx context.Context, writeBufferSize, readBufferSize int, connPoolSize int, useDefaults bool) (*storage.Client, error) {
+ if useDefaults {
+ clientMu.Lock()
+ os.Setenv("STORAGE_USE_GRPC", "true")
+ c, err := storage.NewClient(ctx, option.WithCredentialsFile(credentialsFile))
+ os.Unsetenv("STORAGE_USE_GRPC")
+ clientMu.Unlock()
+ return c, err
+ }
+
+ clientMu.Lock()
+ os.Setenv("STORAGE_USE_GRPC", "true")
+ client, err := storage.NewClient(ctx, option.WithCredentialsFile(credentialsFile),
+ option.WithGRPCDialOption(grpc.WithReadBufferSize(readBufferSize)),
+ option.WithGRPCDialOption(grpc.WithWriteBufferSize(writeBufferSize)),
+ option.WithGRPCConnectionPool(connPoolSize))
+ os.Unsetenv("STORAGE_USE_GRPC")
+ clientMu.Unlock()
+
+ return client, err
+}
diff --git a/storage/internal/benchmarks/download_benchmark.go b/storage/internal/benchmarks/download_benchmark.go
new file mode 100644
index 000000000000..c0bf05a52f35
--- /dev/null
+++ b/storage/internal/benchmarks/download_benchmark.go
@@ -0,0 +1,93 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+import (
+ "context"
+ "fmt"
+ "io"
+ "os"
+ "time"
+
+ "cloud.google.com/go/storage"
+)
+
+type downloadOpts struct {
+ client *storage.Client
+ objectSize int64
+ bucket string
+ object string
+}
+
+func downloadBenchmark(ctx context.Context, dopts downloadOpts) (elapsedTime time.Duration, rerr error) {
+ // Set timer
+ start := time.Now()
+ // Multiple defer statements execute in LIFO order, so this will be the last
+ // thing executed. We use named return parameters so that we can set it directly
+ // and defer the statement so that the time includes typical cleanup steps and
+ // gets set regardless of errors.
+ defer func() { elapsedTime = time.Since(start) }()
+
+ // Set additional timeout
+ ctx, cancel := context.WithTimeout(ctx, time.Minute)
+ defer cancel()
+
+ // Create file to download to
+ f, err := os.CreateTemp("", objectPrefix)
+ if err != nil {
+ rerr = fmt.Errorf("os.Create: %w", err)
+ return
+ }
+ defer func() {
+ closeErr := f.Close()
+ removeErr := os.Remove(f.Name())
+ // if we don't have another error to return, return error for closing file
+ // if that error is also nil, return removeErr
+ if rerr == nil {
+ rerr = removeErr
+ if closeErr != nil {
+ rerr = closeErr
+ }
+ }
+ }()
+
+ // Get reader from object
+ o := dopts.client.Bucket(dopts.bucket).Object(dopts.object)
+ objectReader, err := o.NewReader(ctx)
+ if err != nil {
+ rerr = fmt.Errorf("Object(%q).NewReader: %w", o.ObjectName(), err)
+ return
+ }
+ defer func() {
+ err := objectReader.Close()
+ if rerr == nil {
+ rerr = err
+ }
+ }()
+
+ // Download
+ written, err := io.Copy(f, objectReader)
+ if err != nil {
+ rerr = fmt.Errorf("io.Copy: %w", err)
+ return
+ }
+
+ if written != dopts.objectSize {
+ rerr = fmt.Errorf("did not read all bytes; read: %d, expected to read: %d", written, dopts.objectSize)
+ return
+ }
+
+ return
+}
diff --git a/storage/internal/benchmarks/go.mod b/storage/internal/benchmarks/go.mod
new file mode 100644
index 000000000000..e0afe66c11f9
--- /dev/null
+++ b/storage/internal/benchmarks/go.mod
@@ -0,0 +1,37 @@
+module main
+
+go 1.19
+
+require (
+ cloud.google.com/go/storage v1.26.0
+ github.com/google/uuid v1.3.0
+ golang.org/x/net v0.0.0-20220909164309-bea034e7d591
+ golang.org/x/sync v0.0.0-20220907140024-f12130a52804
+ google.golang.org/api v0.96.0
+ google.golang.org/grpc v1.49.0
+)
+
+require (
+ cloud.google.com/go v0.102.1 // indirect
+ cloud.google.com/go/compute v1.7.0 // indirect
+ cloud.google.com/go/iam v0.3.0 // indirect
+ github.com/census-instrumentation/opencensus-proto v0.2.1 // indirect
+ github.com/cespare/xxhash/v2 v2.1.1 // indirect
+ github.com/cncf/udpa/go v0.0.0-20210930031921-04548b0d99d4 // indirect
+ github.com/cncf/xds/go v0.0.0-20211011173535-cb28da3451f1 // indirect
+ github.com/envoyproxy/go-control-plane v0.10.2-0.20220325020618-49ff273808a1 // indirect
+ github.com/envoyproxy/protoc-gen-validate v0.1.0 // indirect
+ github.com/golang/groupcache v0.0.0-20200121045136-8c9f03a8e57e // indirect
+ github.com/golang/protobuf v1.5.2 // indirect
+ github.com/google/go-cmp v0.5.8 // indirect
+ github.com/googleapis/enterprise-certificate-proxy v0.1.0 // indirect
+ github.com/googleapis/gax-go/v2 v2.4.0 // indirect
+ go.opencensus.io v0.23.0 // indirect
+ golang.org/x/oauth2 v0.0.0-20220909003341-f21342109be1 // indirect
+ golang.org/x/sys v0.0.0-20220728004956-3c1f35247d10 // indirect
+ golang.org/x/text v0.3.7 // indirect
+ golang.org/x/xerrors v0.0.0-20220609144429-65e65417b02f // indirect
+ google.golang.org/appengine v1.6.7 // indirect
+ google.golang.org/genproto v0.0.0-20220810155839-1856144b1d9c // indirect
+ google.golang.org/protobuf v1.28.1 // indirect
+)
diff --git a/storage/internal/benchmarks/go.sum b/storage/internal/benchmarks/go.sum
new file mode 100644
index 000000000000..54130e5f80b4
--- /dev/null
+++ b/storage/internal/benchmarks/go.sum
@@ -0,0 +1,676 @@
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diff --git a/storage/internal/benchmarks/main.go b/storage/internal/benchmarks/main.go
new file mode 100644
index 000000000000..e91c42b9db1e
--- /dev/null
+++ b/storage/internal/benchmarks/main.go
@@ -0,0 +1,526 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+import (
+ "context"
+ "encoding/csv"
+ "flag"
+ "fmt"
+ "io"
+ "log"
+ "math/rand"
+ "os"
+ "runtime"
+ "strconv"
+ "strings"
+ "time"
+
+ "cloud.google.com/go/storage"
+ "golang.org/x/sync/errgroup"
+
+ // Install google-c2p resolver, which is required for direct path.
+ _ "google.golang.org/grpc/xds/googledirectpath"
+ // Install RLS load balancer policy, which is needed for gRPC RLS.
+ _ "google.golang.org/grpc/balancer/rls"
+)
+
+const codeVersion = "0.5.1" // to keep track of which version of the code a benchmark ran on
+
+var (
+ projectID, credentialsFile, outputFile string
+
+ opts = &benchmarkOptions{}
+ results chan benchmarkResult
+)
+
+type benchmarkOptions struct {
+ // all sizes are in bytes
+ api benchmarkAPI
+ bucket string
+ region string
+ timeout time.Duration
+ minObjectSize int64
+ maxObjectSize int64
+ readQuantum int
+ writeQuantum int
+ minWriteSize int
+ maxWriteSize int
+ minReadSize int
+ maxReadSize int
+ minSamples int
+ maxSamples int
+ minChunkSize int64
+ maxChunkSize int64
+ forceGC bool
+ numWorkers int
+ connPoolSize int
+ useDefaults bool
+ outType outputType
+ workload string
+ appendToResults string
+}
+
+func (b benchmarkOptions) String() string {
+ var sb strings.Builder
+
+ stringifiedOpts := []string{
+ fmt.Sprintf("api:\t\t\t%s", b.api),
+ fmt.Sprintf("region:\t\t\t%s", b.region),
+ fmt.Sprintf("timeout:\t\t%s", b.timeout),
+ fmt.Sprintf("number of samples:\tbetween %d - %d", b.minSamples, b.maxSamples),
+ fmt.Sprintf("object size:\t\t%d - %d kib", b.minObjectSize/kib, b.maxObjectSize/kib),
+ fmt.Sprintf("write size:\t\t%d - %d bytes (app buffer for uploads)", b.minWriteSize, b.maxWriteSize),
+ fmt.Sprintf("read size:\t\t%d - %d bytes (app buffer for downloads)", b.minReadSize, b.maxReadSize),
+ fmt.Sprintf("chunk size:\t\t%d - %d kib (library buffer for uploads)", b.minChunkSize/kib, b.maxChunkSize/kib),
+ fmt.Sprintf("connection pool size:\t%d (GRPC)", b.connPoolSize),
+ fmt.Sprintf("num workers:\t\t%d (max number of concurrent benchmark runs at a time)", b.numWorkers),
+ fmt.Sprintf("force garbage collection:%t", b.forceGC),
+ }
+
+ for _, s := range stringifiedOpts {
+ sb.WriteByte('\n')
+ sb.WriteByte('\t')
+ sb.WriteString(s)
+ }
+
+ return sb.String()
+}
+
+func parseFlags() {
+ flag.StringVar((*string)(&opts.api), "api", string(mixedAPIs), "api used to upload/download objects; JSON or XML values will use JSON to uplaod and XML to download")
+ flag.StringVar(&opts.region, "r", "US-WEST1", "region")
+ flag.DurationVar(&opts.timeout, "t", time.Hour, "timeout")
+ flag.Int64Var(&opts.minObjectSize, "min_size", 512*kib, "minimum object size in bytes")
+ flag.Int64Var(&opts.maxObjectSize, "max_size", 2097152*kib, "maximum object size in bytes")
+ flag.IntVar(&opts.minWriteSize, "min_w_size", 4000, "minimum write size in bytes")
+ flag.IntVar(&opts.maxWriteSize, "max_w_size", 4000, "maximum write size in bytes")
+ flag.IntVar(&opts.minReadSize, "min_r_size", 4000, "minimum read size in bytes")
+ flag.IntVar(&opts.maxReadSize, "max_r_size", 4000, "maximum read size in bytes")
+ flag.IntVar(&opts.readQuantum, "q_read", 1, "read quantum for app buffer size")
+ flag.IntVar(&opts.writeQuantum, "q_write", 1, "write quantum for app buffer size")
+ flag.Int64Var(&opts.minChunkSize, "min_cs", 16*1024*1024, "min chunksize in bytes")
+ flag.Int64Var(&opts.maxChunkSize, "max_cs", 16*1024*1024, "max chunksize in bytes")
+ flag.IntVar(&opts.minSamples, "min_samples", 10, "minimum number of objects to upload")
+ flag.IntVar(&opts.maxSamples, "max_samples", 10000, "maximum number of objects to upload")
+ flag.StringVar(&outputFile, "o", "", "file to output results to - if empty, will output to stdout")
+ flag.BoolVar(&opts.forceGC, "gc_f", false, "force garbage collection at the beginning of each upload")
+ flag.IntVar(&opts.numWorkers, "workers", 16, "number of concurrent workers")
+ flag.IntVar(&opts.connPoolSize, "conn_pool", 4, "GRPC connection pool size")
+ flag.BoolVar(&opts.useDefaults, "defaults", false, "use default client configuration")
+ flag.StringVar(&opts.workload, "workload", "", "workload")
+ flag.StringVar(&opts.appendToResults, "labels", "", "labels added to cloud monitoring output")
+
+ flag.StringVar((*string)(&opts.outType), "output_type", string(outputCloudMonitoring), "output as csv or cloud monitoring format")
+ flag.StringVar(&projectID, "p", projectID, "projectID")
+ flag.StringVar(&credentialsFile, "creds", credentialsFile, "path to credentials file")
+ flag.StringVar(&opts.bucket, "bucket", "", "name of bucket to use; will create a bucket if not provided")
+
+ flag.Parse()
+
+ if len(projectID) < 1 {
+ log.Fatalln("Must set a project ID. Use flag -p to specify it.")
+ }
+}
+
+func main() {
+ log.SetOutput(os.Stderr)
+ parseFlags()
+ rand.Seed(time.Now().UnixNano())
+ closePools := initializeClientPools(opts)
+ defer closePools()
+
+ start := time.Now()
+ ctx, cancel := context.WithDeadline(context.Background(), start.Add(opts.timeout))
+ defer cancel()
+
+ // Create bucket if necessary
+ if len(opts.bucket) < 1 {
+ opts.bucket = randomName(bucketPrefix)
+ cleanUp := createBenchmarkBucket(opts.bucket, opts)
+ defer cleanUp()
+ }
+
+ // Create output file
+ var file *os.File
+ if outputFile != "" {
+ f, err := os.Create(outputFile)
+ if err != nil {
+ log.Fatalf("Failed to create file %s: %v", outputFile, err)
+ }
+ defer f.Close()
+ file = f
+ }
+
+ // Enable direct path
+ if opts.api == directPath {
+ if err := os.Setenv("GOOGLE_CLOUD_ENABLE_DIRECT_PATH_XDS", "true"); err != nil {
+ log.Fatalf("error setting direct path env var: %v", err)
+ }
+ }
+
+ if err := opts.api.validate(); err != nil {
+ log.Fatal(err)
+ }
+ if err := opts.outType.validate(); err != nil {
+ log.Fatal(err)
+ }
+
+ w := os.Stdout
+
+ if outputFile != "" {
+ w = file
+ // Print benchmarking options
+ fmt.Printf("Benchmarking started: %s\n", start.UTC().Format(time.ANSIC))
+ fmt.Printf("Code version: %s\n", codeVersion)
+ fmt.Printf("Results file: %s\n", outputFile)
+ fmt.Printf("Bucket: %s\n", opts.bucket)
+ fmt.Printf("Benchmarking options: %+v\n", opts)
+ }
+
+ if err := populateDependencyVersions(); err != nil {
+ log.Printf("populateDependencyVersions: %v", err)
+ }
+
+ recordResultGroup, _ := errgroup.WithContext(ctx)
+ startRecordingResults(w, recordResultGroup, opts.outType)
+
+ benchGroup, _ := errgroup.WithContext(ctx)
+ benchGroup.SetLimit(opts.numWorkers)
+
+ // Run benchmarks
+ for i := 0; i < opts.maxSamples && (i < opts.minSamples || time.Since(start) < opts.timeout); i++ {
+ benchGroup.Go(func() error {
+ benchmark := w1r3{opts: opts, bucketName: opts.bucket}
+ if err := benchmark.setup(); err != nil {
+ // We don't want to stop benchmarking on a single run's error, so just log
+ log.Printf("run setup failed: %v", err)
+ return nil
+ }
+ if err := benchmark.run(ctx); err != nil {
+ log.Printf("run failed: %v", err)
+ }
+ return nil
+ })
+ }
+
+ benchGroup.Wait()
+ close(results)
+ recordResultGroup.Wait()
+
+ if outputFile != "" {
+ fmt.Printf("\nTotal time running: %s\n", time.Since(start).Round(time.Second))
+ }
+}
+
+type randomizedParams struct {
+ appBufferSize int
+ chunkSize int64
+ crc32cEnabled bool
+ md5Enabled bool
+ api benchmarkAPI
+}
+
+type benchmarkResult struct {
+ objectSize int64
+ params randomizedParams
+ isRead bool
+ readIteration int
+ start time.Time
+ elapsedTime time.Duration
+ completed bool
+ startMem runtime.MemStats
+ endMem runtime.MemStats
+}
+
+func (br *benchmarkResult) selectParams(opts benchmarkOptions) {
+ api := opts.api
+ if api == mixedAPIs {
+ if randomBool() {
+ api = xmlAPI
+ } else {
+ api = grpcAPI
+ }
+ }
+
+ if br.isRead {
+ if api == jsonAPI {
+ api = xmlAPI
+ }
+
+ br.params = randomizedParams{
+ appBufferSize: opts.readQuantum * randomInt(opts.minReadSize/opts.readQuantum, opts.maxReadSize/opts.readQuantum),
+ chunkSize: -1, // not used for reads
+ crc32cEnabled: true, // crc32c is always verified in the Go GCS library
+ md5Enabled: false, // we only need one integrity validation
+ api: api,
+ }
+
+ if opts.useDefaults {
+ br.params.appBufferSize = -1 // use -1 to indicate default; if we give it a value any change to defaults would not be reflected
+ }
+
+ return
+ }
+
+ if api == xmlAPI {
+ api = jsonAPI
+ }
+
+ _, doMD5, doCRC32C := randomOf3()
+ br.params = randomizedParams{
+ appBufferSize: opts.writeQuantum * randomInt(opts.minWriteSize/opts.writeQuantum, opts.maxWriteSize/opts.writeQuantum),
+ chunkSize: randomInt64(opts.minChunkSize, opts.maxChunkSize),
+ crc32cEnabled: doCRC32C,
+ md5Enabled: doMD5,
+ api: api,
+ }
+
+ if opts.useDefaults {
+ // get a writer on an object to check the default chunksize
+ // object does not need to exist
+ if c, err := storage.NewClient(context.Background()); err != nil {
+ log.Printf("storage.NewClient: %v", err)
+ } else {
+ w := c.Bucket("").Object("").NewWriter(context.Background())
+ br.params.chunkSize = int64(w.ChunkSize)
+ }
+
+ br.params.appBufferSize = -1 // use -1 to indicate default; if we give it a value any change to defaults would not be reflected
+ }
+}
+
+// converts result to cloud monitoring format
+func (br *benchmarkResult) cloudMonitoring() []byte {
+ var sb strings.Builder
+ op := "WRITE"
+ if br.isRead {
+ op = fmt.Sprintf("READ[%d]", br.readIteration)
+ }
+ status := "[OK]"
+ if !br.completed {
+ status = "[FAIL]"
+ }
+
+ throughput := float64(br.objectSize) / float64(br.elapsedTime.Seconds())
+
+ // Cloud monitoring only allows letters, numbers and underscores
+ sanitizeKey := func(key string) string {
+ key = strings.Replace(key, ".", "", -1)
+ return strings.Replace(key, "/", "_", -1)
+ }
+
+ makeStringQuoted := func(parameter string, value any) string {
+ return fmt.Sprintf("%s=\"%v\"", parameter, value)
+ }
+ makeStringUnquoted := func(parameter string, value any) string {
+ return fmt.Sprintf("%s=%v", parameter, value)
+ }
+
+ sb.Grow(380)
+ sb.WriteString("throughput{")
+ sb.WriteString(makeStringQuoted("workload", opts.workload))
+ sb.WriteString(",")
+ sb.WriteString(makeStringQuoted("Op", op))
+ sb.WriteString(",")
+ sb.WriteString(makeStringUnquoted("ObjectSize", br.objectSize))
+ sb.WriteString(",")
+ sb.WriteString(makeStringUnquoted("AppBufferSize", br.params.appBufferSize))
+ sb.WriteString(",")
+ sb.WriteString(makeStringUnquoted("LibBufferSize", br.params.chunkSize))
+ sb.WriteString(",")
+ sb.WriteString(makeStringUnquoted("Crc32cEnabled", br.params.crc32cEnabled))
+ sb.WriteString(",")
+ sb.WriteString(makeStringUnquoted("MD5Enabled", br.params.md5Enabled))
+ sb.WriteString(",")
+ sb.WriteString(makeStringQuoted("Api", br.params.api))
+ sb.WriteString(",")
+ sb.WriteString(makeStringUnquoted("ElapsedMicroseconds", br.elapsedTime.Microseconds()))
+ sb.WriteString(",")
+ sb.WriteString(makeStringQuoted("Status", status))
+ sb.WriteString(",")
+ sb.WriteString(makeStringUnquoted("HeapSys", br.startMem.HeapSys))
+ sb.WriteString(",")
+ sb.WriteString(makeStringUnquoted("HeapAlloc", br.startMem.HeapAlloc))
+ sb.WriteString(",")
+ sb.WriteString(makeStringUnquoted("StackInUse", br.startMem.StackInuse))
+ sb.WriteString(",")
+ sb.WriteString(makeStringUnquoted("StartTime", br.start.Unix()))
+ sb.WriteString(",")
+ sb.WriteString(makeStringUnquoted("EndTime", br.start.Add(br.elapsedTime).Unix()))
+ sb.WriteString(",")
+ sb.WriteString(makeStringUnquoted("NumWorkers", opts.numWorkers))
+ sb.WriteString(",")
+ sb.WriteString(makeStringQuoted("CodeVersion", codeVersion))
+ sb.WriteString(",")
+ sb.WriteString(makeStringQuoted("BucketName", opts.bucket))
+ sb.WriteString(",")
+ sb.WriteString(makeStringQuoted("GoVersion", goVersion))
+ for dep, ver := range dependencyVersions {
+ sb.WriteString(",")
+ sb.WriteString(makeStringQuoted(sanitizeKey(dep), ver))
+ }
+
+ if opts.appendToResults != "" {
+ sb.WriteString(",")
+ sb.WriteString(opts.appendToResults)
+ }
+
+ sb.WriteString("} ")
+ sb.WriteString(strconv.FormatFloat(throughput, 'f', 2, 64))
+
+ return []byte(sb.String())
+}
+
+// converts result to csv writing format (ie. a slice of strings)
+func (br *benchmarkResult) csv() []string {
+ op := "WRITE"
+ if br.isRead {
+ op = fmt.Sprintf("READ[%d]", br.readIteration)
+ }
+ status := "[OK]"
+ if !br.completed {
+ status = "[FAIL]"
+ }
+
+ record := make(map[string]string)
+
+ record["Op"] = op
+ record["ObjectSize"] = strconv.FormatInt(br.objectSize, 10)
+ record["AppBufferSize"] = strconv.Itoa(br.params.appBufferSize)
+ record["LibBufferSize"] = strconv.Itoa(int(br.params.chunkSize))
+ record["Crc32cEnabled"] = strconv.FormatBool(br.params.crc32cEnabled)
+ record["MD5Enabled"] = strconv.FormatBool(br.params.md5Enabled)
+ record["ApiName"] = string(br.params.api)
+ record["ElapsedTimeUs"] = strconv.FormatInt(br.elapsedTime.Microseconds(), 10)
+ record["CpuTimeUs"] = "-1" // TODO: record cpu time
+ record["Status"] = status
+ record["HeapSys"] = strconv.FormatUint(br.startMem.HeapSys, 10)
+ record["HeapAlloc"] = strconv.FormatUint(br.startMem.HeapAlloc, 10)
+ record["StackInUse"] = strconv.FormatUint(br.startMem.StackInuse, 10)
+ // commented out to avoid large numbers messing up BigQuery imports
+ record["HeapAllocDiff"] = "-1" //strconv.FormatUint(br.endMem.HeapAlloc-br.startMem.HeapAlloc, 10),
+ record["MallocsDiff"] = strconv.FormatUint(br.endMem.Mallocs-br.startMem.Mallocs, 10)
+ record["StartTime"] = strconv.FormatInt(br.start.Unix(), 10)
+ record["EndTime"] = strconv.FormatInt(br.start.Add(br.elapsedTime).Unix(), 10)
+ record["NumWorkers"] = strconv.Itoa(opts.numWorkers)
+ record["CodeVersion"] = codeVersion
+ record["BucketName"] = opts.bucket
+
+ var result []string
+
+ for _, h := range csvHeader {
+ result = append(result, record[h])
+ }
+
+ return result
+}
+
+var csvHeader = []string{
+ "Op", "ObjectSize", "AppBufferSize", "LibBufferSize",
+ "Crc32cEnabled", "MD5Enabled", "ApiName",
+ "ElapsedTimeUs", "CpuTimeUs", "Status",
+ "HeapSys", "HeapAlloc", "StackInUse", "HeapAllocDiff", "MallocsDiff",
+ "StartTime", "EndTime", "NumWorkers",
+ "CodeVersion", "BucketName",
+}
+
+type benchmarkAPI string
+
+const (
+ jsonAPI benchmarkAPI = "JSON"
+ xmlAPI benchmarkAPI = "XML"
+ grpcAPI benchmarkAPI = "GRPC"
+ mixedAPIs benchmarkAPI = "MIXED"
+ directPath benchmarkAPI = "DirectPath"
+)
+
+func (api benchmarkAPI) validate() error {
+ switch api {
+ case jsonAPI, grpcAPI, xmlAPI, directPath, mixedAPIs:
+ return nil
+ default:
+ return fmt.Errorf("no such api: %s", api)
+ }
+}
+
+func writeHeader(w io.Writer) {
+ cw := csv.NewWriter(w)
+ if err := cw.Write(csvHeader); err != nil {
+ log.Fatalf("error writing csv header: %v", err)
+ }
+ cw.Flush()
+}
+
+func writeResultAsCSV(w io.Writer, result *benchmarkResult) {
+ cw := csv.NewWriter(w)
+ if err := cw.Write(result.csv()); err != nil {
+ log.Fatalf("error writing csv: %v", err)
+ }
+ cw.Flush()
+}
+
+func writeResultAsCloudMonitoring(w io.Writer, result *benchmarkResult) {
+ _, err := w.Write(result.cloudMonitoring())
+ if err != nil {
+ log.Fatalf("cloud monitoring w.Write: %v", err)
+ }
+ _, err = w.Write([]byte{'\n'})
+ if err != nil {
+ log.Fatalf("cloud monitoring w.Write: %v", err)
+ }
+}
+
+func startRecordingResults(w io.Writer, g *errgroup.Group, oType outputType) {
+ // buffer channel so we don't block on printing results
+ results = make(chan benchmarkResult, 100)
+
+ if oType == outputCSV {
+ writeHeader(w)
+ }
+
+ // start recording results
+ g.Go(func() error {
+ for {
+ result, ok := <-results
+ if !ok {
+ break
+ }
+
+ if oType == outputCSV {
+ writeResultAsCSV(w, &result)
+ } else if oType == outputCloudMonitoring {
+ writeResultAsCloudMonitoring(w, &result)
+ }
+ }
+ return nil
+ })
+}
+
+type outputType string
+
+const (
+ outputCSV outputType = "csv"
+ outputCloudMonitoring outputType = "cloud-monitoring"
+)
+
+func (o outputType) validate() error {
+ switch o {
+ case outputCSV, outputCloudMonitoring:
+ return nil
+ default:
+ return fmt.Errorf("could not parse output type: %s", o)
+ }
+}
diff --git a/storage/internal/benchmarks/upload_benchmark.go b/storage/internal/benchmarks/upload_benchmark.go
new file mode 100644
index 000000000000..10a65e72cfc7
--- /dev/null
+++ b/storage/internal/benchmarks/upload_benchmark.go
@@ -0,0 +1,138 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+import (
+ "bytes"
+ "context"
+ "crypto/md5"
+ "errors"
+ "fmt"
+ "hash"
+ "hash/crc32"
+ "io"
+ "net/http"
+ "os"
+ "time"
+
+ "cloud.google.com/go/storage"
+ "google.golang.org/api/googleapi"
+)
+
+type uploadOpts struct {
+ client *storage.Client
+ params randomizedParams
+ bucket string
+ object string
+ useDefaultChunkSize bool
+ objectPath string
+}
+
+func uploadBenchmark(ctx context.Context, uopts uploadOpts) (elapsedTime time.Duration, rerr error) {
+ // Set timer
+ start := time.Now()
+ // Multiple defer statements execute in LIFO order, so this will be the last
+ // thing executed. We use named return parameters so that we can set it directly
+ // and defer the statement so that the time includes typical cleanup steps and
+ // gets set regardless of errors.
+ defer func() { elapsedTime = time.Since(start) }()
+
+ // Set additional timeout
+ ctx, cancel := context.WithTimeout(ctx, time.Minute)
+ defer cancel()
+
+ // Open file
+ f, err := os.Open(uopts.objectPath)
+ if err != nil {
+ return elapsedTime, fmt.Errorf("os.Open: %w", err)
+ }
+ defer f.Close()
+
+ // Get writer to object
+ o := uopts.client.Bucket(uopts.bucket).Object(uopts.object)
+ objectWriter := o.If(storage.Conditions{DoesNotExist: true}).NewWriter(ctx)
+ if !uopts.useDefaultChunkSize {
+ objectWriter.ChunkSize = int(uopts.params.chunkSize)
+ }
+
+ mw, md5Hash, crc32cHash := generateUploadWriter(objectWriter, uopts.params.md5Enabled, uopts.params.crc32cEnabled)
+
+ // Upload file
+ if _, err = io.Copy(mw, f); err != nil {
+ var e *googleapi.Error
+ // Consider a 412 (StatusPreconditionFailed) a success, given the precondition
+ // we used
+ if ok := errors.As(err, &e); !ok || (ok && e.Code != http.StatusPreconditionFailed) {
+ return elapsedTime, fmt.Errorf("io.Copy: %w", err)
+ }
+ }
+
+ err = objectWriter.Close()
+ if err != nil {
+ // Consider a 412 (StatusPreconditionFailed) a success, given the precondition
+ // we used
+ var e *googleapi.Error
+ if ok := errors.As(err, &e); !ok || (ok && e.Code != http.StatusPreconditionFailed) {
+ return elapsedTime, fmt.Errorf("io.Copy: %w", err)
+ }
+ }
+
+ // Verify checksum
+ if uopts.params.crc32cEnabled || uopts.params.md5Enabled {
+ attrs, aerr := o.Attrs(ctx)
+ if aerr != nil {
+ return elapsedTime, fmt.Errorf("get attrs on object %s/%s : %w", o.BucketName(), o.ObjectName(), aerr)
+ }
+
+ rerr = verifyHash(md5Hash, crc32cHash, attrs.MD5, attrs.CRC32C)
+ }
+
+ return
+}
+
+// generateUploadWriter selects the appropriate writer for an upload benchmark.
+// If one of hashMD5 or hashCRC is true, it returns a MultiWriter that writes to
+// the provided writer, as well as to the respective hash (also returned).
+// If neither is true, generateUploadWriter returns the provided writer and nil hashes.
+func generateUploadWriter(w io.Writer, hashMD5, hashCRC bool) (mw io.Writer, md5Hash hash.Hash, crc32cHash hash.Hash32) {
+ if hashMD5 {
+ md5Hash = md5.New()
+ mw = io.MultiWriter(w, md5Hash)
+ return
+ }
+ if hashCRC {
+ crc32cHash = crc32.New(crc32.MakeTable(crc32.Castagnoli))
+ mw = io.MultiWriter(w, crc32cHash)
+ return
+ }
+
+ return w, nil, nil
+}
+
+// verify checks the hashs against the given md5 and crc32c checksums. If a hash
+// is nil, the check is skipped.
+func verifyHash(md5Hash hash.Hash, crc32cHash hash.Hash32, expectedMD5Hash []byte, expectedCRCChecksum uint32) (err error) {
+ if md5Hash != nil {
+ if got := md5Hash.Sum(nil); !bytes.Equal(got, expectedMD5Hash) {
+ return fmt.Errorf("md5 checksum does not match; \n\tgot: \t\t%d, \n\texpected: \t%d", got, expectedMD5Hash)
+ }
+ }
+ if crc32cHash != nil {
+ if got := crc32cHash.Sum32(); got != expectedCRCChecksum {
+ return fmt.Errorf("crc checksum does not match; got: %d, expected: %d", got, expectedCRCChecksum)
+ }
+ }
+ return nil
+}
diff --git a/storage/internal/benchmarks/utils.go b/storage/internal/benchmarks/utils.go
new file mode 100644
index 000000000000..e3935844e9db
--- /dev/null
+++ b/storage/internal/benchmarks/utils.go
@@ -0,0 +1,134 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+import (
+ "context"
+ crand "crypto/rand"
+ "fmt"
+ "io"
+ "log"
+ "math/rand"
+ "os"
+ "runtime/debug"
+ "strings"
+
+ "cloud.google.com/go/storage"
+ "github.com/google/uuid"
+ "google.golang.org/api/option"
+)
+
+const (
+ kib = 1024
+ bucketPrefix = "golang-grpc-test-" // needs to be this for GRPC for now
+ objectPrefix = "benchmark-obj-"
+)
+
+func randomBool() bool {
+ return rand.Intn(2) == 0
+}
+
+// randomOf3 returns 2 negative and one positive bool, randomly assigning the
+// position of the positive return value.
+func randomOf3() (bool, bool, bool) {
+ r := rand.Intn(3)
+ return r == 0, r == 1, r == 2
+}
+
+// randomInt64 returns a value in the closed interval [min, max].
+// That is, the endpoints are possible return values.
+func randomInt64(min, max int64) int64 {
+ if min > max {
+ log.Fatalf("min cannot be larger than max; min: %d max: %d", min, max)
+ }
+ return rand.Int63n(max-min+1) + min
+}
+
+// randomInt returns a value in the closed interval [min, max].
+// That is, the endpoints are possible return values.
+func randomInt(min, max int) int {
+ if min > max {
+ log.Fatalf("min cannot be larger than max; min: %d max: %d", min, max)
+ }
+ return rand.Intn(max-min+1) + min
+}
+
+func randomName(prefix string) string {
+ var sb strings.Builder
+
+ sb.WriteString(prefix)
+ sb.WriteString(uuid.New().String())
+ return sb.String()
+}
+
+// createBenchmarkBucket creates a bucket and returns a function to delete it.
+func createBenchmarkBucket(bucketName string, opts *benchmarkOptions) func() {
+ ctx := context.Background()
+
+ // Create a bucket for the tests. We do not need to benchmark this.
+ c, err := storage.NewClient(ctx, option.WithCredentialsFile(credentialsFile))
+ if err != nil {
+ log.Fatalf("NewClient: %v", err)
+ }
+ err = c.Bucket(bucketName).Create(ctx, projectID, &storage.BucketAttrs{
+ Location: opts.region,
+ StorageClass: "STANDARD",
+ })
+ if err != nil {
+ log.Fatalf("bucket.Create: %v", err)
+ }
+
+ return func() {
+ if err := c.Bucket(bucketName).Delete(context.Background()); err != nil {
+ log.Fatalf("bucket delete: %v", err)
+ }
+ }
+}
+
+// generateRandomFile creates a temp file on disk and fills it with size random bytes.
+func generateRandomFile(size int64) (string, error) {
+ f, err := os.CreateTemp("", objectPrefix)
+ if err != nil {
+ return "", fmt.Errorf("error creating file: %v", err)
+ }
+ defer f.Close()
+
+ _, err = io.CopyN(f, crand.Reader, size)
+
+ return f.Name(), err
+}
+
+var goVersion string
+var dependencyVersions = map[string]string{
+ "cloud.google.com/go/storage": "",
+ "google.golang.org/api": "",
+ "cloud.google.com/go": "",
+ "google.golang.org/grpc": "",
+}
+
+func populateDependencyVersions() error {
+ info, ok := debug.ReadBuildInfo()
+ if !ok {
+ return fmt.Errorf("binary not built with module support, cannot read build info")
+ }
+
+ goVersion = info.GoVersion
+ for _, mod := range info.Deps {
+ if _, ok := dependencyVersions[mod.Path]; ok {
+ dependencyVersions[mod.Path] = mod.Version
+ }
+ }
+ return nil
+}
diff --git a/storage/internal/benchmarks/w1r3.go b/storage/internal/benchmarks/w1r3.go
new file mode 100644
index 000000000000..64141a271bb3
--- /dev/null
+++ b/storage/internal/benchmarks/w1r3.go
@@ -0,0 +1,196 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+import (
+ "context"
+ "errors"
+ "fmt"
+ "log"
+ "os"
+ "path"
+ "runtime"
+ "time"
+
+ "cloud.google.com/go/storage"
+)
+
+// w1r3 or "write one, read three" is a benchmark that uploads a randomly generated
+// object once and then downloads in three times. The object is downloaded more
+// than once to compare "cold" (just uploaded) vs. "hot" data.
+//
+// SET UP
+// - Initialize structs to populate with the benchmark results.
+// - Select a random size for the object that will be uploaded; this size will
+// be between two values configured in the command-line.
+// - Create an object of that size on disk, and fill with random contents.
+// - Select, for the upload and each download separately, the following parameters:
+// - a random API to use to upload/download the object, unless it is set in
+// the command-line,
+// - the application buffer size, unless "default" is set in the command-line.
+// This size is quantized, and the quantum, as well as the range, can be
+// configured in the command-line;
+// - the chunksize (only for uploads); this size will be between two values
+// configured in the command-line,
+// - if the client library will perform CRC32C and/or MD5 hashes on the data.
+//
+// BENCHMARK
+// - Create a storage client or grab one from the pool. No client will ever process
+// more than one upload or download at a time.
+// - Take a snapshot of the current memory stats.
+// - Upload the object that was created in the set up, capturing the time taken.
+// This includes opening the file, writing the object, and verifying the hash
+// (if applicable).
+// - Take another snapshot of memory stats.
+// - Delete the file from the OS.
+// - Then the program downloads the same object (3 times), getting a different
+// client for each, capturing the elapsed time and taking memory snapshots
+// before and after each download.
+// - Delete the object and return the clients to the pool or close them.
+type w1r3 struct {
+ opts *benchmarkOptions
+ bucketName, objectName string
+ objectPath string
+ writeResult *benchmarkResult
+ readResults []*benchmarkResult
+}
+
+func (r *w1r3) setup() error {
+ objectSize := randomInt64(opts.minObjectSize, opts.maxObjectSize)
+ r.writeResult = &benchmarkResult{objectSize: objectSize}
+ r.readResults = []*benchmarkResult{{}, {}, {}}
+
+ r.writeResult.selectParams(*r.opts)
+ for i, res := range r.readResults {
+ res.isRead = true
+ res.readIteration = i
+ res.objectSize = objectSize
+ res.selectParams(*r.opts)
+ }
+
+ // Create contents
+ objectPath, err := generateRandomFile(objectSize)
+ if err != nil {
+ return fmt.Errorf("generateRandomFile: %w", err)
+ }
+
+ r.objectPath = objectPath
+ r.objectName = path.Base(objectPath)
+ return nil
+}
+
+func (r *w1r3) run(ctx context.Context) error {
+ var memStats *runtime.MemStats = &runtime.MemStats{}
+
+ defer func() {
+ c := nonBenchmarkingClients.Get()
+ o := c.Bucket(r.bucketName).Object(r.objectName).Retryer(storage.WithPolicy(storage.RetryAlways))
+ o.Delete(context.Background())
+ nonBenchmarkingClients.Put(c)
+ }()
+
+ // Upload
+
+ // If the option is specified, run the garbage collector before collecting
+ // memory statistics and starting the timer on the benchmark. This can be
+ // used to compare between running each benchmark "on a blank slate" vs organically.
+ if opts.forceGC {
+ runtime.GC()
+ }
+
+ client, close, err := getClient(ctx, opts, *r.writeResult)
+ if err != nil {
+ return fmt.Errorf("getClient: %w", err)
+ }
+ defer func() {
+ if err := close(); err != nil {
+ log.Printf("close client: %v", err)
+ }
+ }()
+
+ runtime.ReadMemStats(memStats)
+ r.writeResult.startMem = *memStats
+ r.writeResult.start = time.Now()
+
+ timeTaken, err := uploadBenchmark(ctx, uploadOpts{
+ client: client,
+ params: r.writeResult.params,
+ bucket: r.bucketName,
+ object: r.objectName,
+ useDefaultChunkSize: opts.useDefaults,
+ objectPath: r.objectPath,
+ })
+
+ runtime.ReadMemStats(memStats)
+ r.writeResult.endMem = *memStats
+ r.writeResult.completed = err == nil
+ r.writeResult.elapsedTime = timeTaken
+
+ results <- *r.writeResult
+ os.Remove(r.objectPath)
+
+ // Do not attempt to read from a failed upload
+ if err != nil {
+ return fmt.Errorf("failed upload: %w", err)
+ }
+
+ // Read
+ for i := 0; i < 3; i++ {
+ // If the option is specified, run a garbage collector before collecting
+ // memory statistics and starting the timer on the benchmark. This can be
+ // used to compare between running each benchmark "on a blank slate" vs organically.
+ if opts.forceGC {
+ runtime.GC()
+ }
+
+ client, close, err := getClient(ctx, opts, *r.readResults[i])
+ if err != nil {
+ return fmt.Errorf("getClient: %w", err)
+ }
+ defer func() {
+ if err := close(); err != nil {
+ log.Printf("close client: %v", err)
+ }
+ }()
+
+ runtime.ReadMemStats(memStats)
+ r.readResults[i].startMem = *memStats
+ r.readResults[i].start = time.Now()
+
+ timeTaken, err := downloadBenchmark(ctx, downloadOpts{
+ client: client,
+ objectSize: r.readResults[i].objectSize,
+ bucket: r.bucketName,
+ object: r.objectName,
+ })
+
+ runtime.ReadMemStats(memStats)
+ r.readResults[i].endMem = *memStats
+ r.readResults[i].completed = err == nil
+ r.readResults[i].elapsedTime = timeTaken
+
+ results <- *r.readResults[i]
+
+ // do not return error, continue to attempt to read
+ if err != nil {
+ if errors.Is(err, context.DeadlineExceeded) {
+ return err
+ }
+ log.Printf("read error: %v", err)
+ }
+ }
+
+ return nil
+}