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112 lines
3.8 KiB
Go
112 lines
3.8 KiB
Go
/*
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* Minio Cloud Storage, (C) 2016 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package main
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import (
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"bytes"
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"crypto/md5"
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"encoding/hex"
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"math/rand"
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"strconv"
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"testing"
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"time"
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)
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// Creates Object layer setup ( MakeBucket, PutObject) and then runs the benchmark.
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func runGetObjectBenchmark(b *testing.B, obj ObjectLayer, objSize int) {
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var err error
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// obtains random bucket name.
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bucket := getRandomBucketName()
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// create bucket.
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err = obj.MakeBucket(bucket)
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if err != nil {
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b.Fatal(err)
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}
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// PutObject returns md5Sum of the object inserted.
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// md5Sum variable is assigned with that value.
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var md5Sum string
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for i := 0; i < 10; i++ {
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// get text data generated for number of bytes equal to object size.
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textData := generateBytesData(objSize)
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// generate md5sum for the generated data.
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// md5sum of the data to written is required as input for PutObject.
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// PutObject is the functions which writes the data onto the FS/XL backend.
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hasher := md5.New()
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hasher.Write([]byte(textData))
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metadata := make(map[string]string)
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metadata["md5Sum"] = hex.EncodeToString(hasher.Sum(nil))
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// insert the object.
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md5Sum, err = obj.PutObject(bucket, "object"+strconv.Itoa(i), int64(len(textData)), bytes.NewBuffer(textData), metadata)
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if err != nil {
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b.Fatal(err)
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}
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if md5Sum != metadata["md5Sum"] {
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b.Fatalf("Write no: %d: Md5Sum mismatch during object write into the bucket: Expected %s, got %s", i+1, md5Sum, metadata["md5Sum"])
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}
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}
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// benchmark utility which helps obtain number of allocations and bytes allocated per ops.
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b.ReportAllocs()
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// the actual benchmark for GetObject starts here. Reset the benchmark timer.
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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var buffer = new(bytes.Buffer)
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err = obj.GetObject(bucket, "object"+strconv.Itoa(i%10), 0, int64(objSize), buffer)
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if err != nil {
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b.Error(err)
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}
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}
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// Benchmark ends here. Stop timer.
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b.StopTimer()
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}
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func generateBytesData(size int) []byte {
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// randomly picks a character and returns its equivalent byte array.
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getRandomByte := func() []byte {
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const letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
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// seeding the random number generator.
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rand.Seed(time.Now().UnixNano())
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var b byte
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// pick a character randomly.
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b = letterBytes[rand.Intn(len(letterBytes))]
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return []byte{b}
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}
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// repeat the random character chosen size.
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return bytes.Repeat(getRandomByte(), size)
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}
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// creates XL/FS backend setup, obtains the object layer and calls the runGetObjectBenchmark function.
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func benchmarkGetObject(b *testing.B, instanceType string, runBenchMark func(b *testing.B, obj ObjectLayer)) {
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// create a temp XL/FS backend.
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objLayer, disks, err := makeTestBackend(instanceType)
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if err != nil {
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b.Fatalf("Failed obtaining Temp Backend: <ERROR> %s", err)
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}
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// cleaning up the backend by removing all the directories and files created.
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defer removeRoots(disks)
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// calling runGetObjectBenchmark which uses *testing.B and the object Layer to run the benchmark.
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runBenchMark(b, objLayer)
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}
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// closure for returning the get object benchmark executor for given object size in bytes.
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func returnGetObjectBenchmark(objSize int) func(*testing.B, ObjectLayer) {
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return func(b *testing.B, obj ObjectLayer) {
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runGetObjectBenchmark(b, obj, objSize)
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}
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}
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