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minio/cmd/erasure-sets_test.go

233 lines
6.5 KiB

/*
* MinIO Cloud Storage, (C) 2017 MinIO, Inc.
*
* 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 cmd
import (
"context"
"os"
"path/filepath"
"testing"
"github.com/google/uuid"
)
var testUUID = uuid.MustParse("f5c58c61-7175-4018-ab5e-a94fe9c2de4e")
func BenchmarkCrcHash(b *testing.B) {
cases := []struct {
key int
}{
{16},
{64},
{128},
{256},
{512},
{1024},
}
for _, testCase := range cases {
testCase := testCase
key := randString(testCase.key)
b.Run("", func(b *testing.B) {
b.SetBytes(1024)
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
crcHashMod(key, 16)
}
})
}
}
func BenchmarkSipHash(b *testing.B) {
cases := []struct {
key int
}{
{16},
{64},
{128},
{256},
{512},
{1024},
}
for _, testCase := range cases {
testCase := testCase
key := randString(testCase.key)
b.Run("", func(b *testing.B) {
b.SetBytes(1024)
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
sipHashMod(key, 16, testUUID)
}
})
}
}
// TestSipHashMod - test sip hash.
func TestSipHashMod(t *testing.T) {
testCases := []struct {
objectName string
sipHash int
}{
// cases which should pass the test.
// passing in valid object name.
{"object", 37},
{"The Shining Script <v1>.pdf", 38},
{"Cost Benefit Analysis (2009-2010).pptx", 59},
{"117Gn8rfHL2ACARPAhaFd0AGzic9pUbIA/5OCn5A", 35},
{"SHØRT", 49},
{"There are far too many object names, and far too few bucket names!", 8},
{"a/b/c/", 159},
{"/a/b/c", 96},
{string([]byte{0xff, 0xfe, 0xfd}), 147},
}
// Tests hashing order to be consistent.
for i, testCase := range testCases {
if sipHashElement := hashKey("SIPMOD", testCase.objectName, 200, testUUID); sipHashElement != testCase.sipHash {
t.Errorf("Test case %d: Expected \"%v\" but failed \"%v\"", i+1, testCase.sipHash, sipHashElement)
}
}
if sipHashElement := hashKey("SIPMOD", "This will fail", -1, testUUID); sipHashElement != -1 {
t.Errorf("Test: Expected \"-1\" but got \"%v\"", sipHashElement)
}
if sipHashElement := hashKey("SIPMOD", "This will fail", 0, testUUID); sipHashElement != -1 {
t.Errorf("Test: Expected \"-1\" but got \"%v\"", sipHashElement)
}
if sipHashElement := hashKey("UNKNOWN", "This will fail", 0, testUUID); sipHashElement != -1 {
t.Errorf("Test: Expected \"-1\" but got \"%v\"", sipHashElement)
}
}
// TestCrcHashMod - test crc hash.
func TestCrcHashMod(t *testing.T) {
testCases := []struct {
objectName string
crcHash int
}{
// cases which should pass the test.
// passing in valid object name.
{"object", 28},
{"The Shining Script <v1>.pdf", 142},
{"Cost Benefit Analysis (2009-2010).pptx", 133},
{"117Gn8rfHL2ACARPAhaFd0AGzic9pUbIA/5OCn5A", 185},
{"SHØRT", 97},
{"There are far too many object names, and far too few bucket names!", 101},
{"a/b/c/", 193},
{"/a/b/c", 116},
{string([]byte{0xff, 0xfe, 0xfd}), 61},
}
// Tests hashing order to be consistent.
for i, testCase := range testCases {
if crcHashElement := hashKey("CRCMOD", testCase.objectName, 200, testUUID); crcHashElement != testCase.crcHash {
t.Errorf("Test case %d: Expected \"%v\" but failed \"%v\"", i+1, testCase.crcHash, crcHashElement)
}
}
if crcHashElement := hashKey("CRCMOD", "This will fail", -1, testUUID); crcHashElement != -1 {
t.Errorf("Test: Expected \"-1\" but got \"%v\"", crcHashElement)
}
if crcHashElement := hashKey("CRCMOD", "This will fail", 0, testUUID); crcHashElement != -1 {
t.Errorf("Test: Expected \"-1\" but got \"%v\"", crcHashElement)
}
if crcHashElement := hashKey("UNKNOWN", "This will fail", 0, testUUID); crcHashElement != -1 {
t.Errorf("Test: Expected \"-1\" but got \"%v\"", crcHashElement)
}
}
// TestNewErasure - tests initialization of all input disks
// and constructs a valid `Erasure` object
func TestNewErasureSets(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
var nDisks = 16 // Maximum disks.
var erasureDisks []string
for i := 0; i < nDisks; i++ {
// Do not attempt to create this path, the test validates
// so that newErasureSets initializes non existing paths
// and successfully returns initialized object layer.
disk := filepath.Join(globalTestTmpDir, "minio-"+nextSuffix())
erasureDisks = append(erasureDisks, disk)
defer os.RemoveAll(disk)
}
endpoints := mustGetNewEndpoints(erasureDisks...)
_, _, err := waitForFormatErasure(true, endpoints, 1, 0, 16, "")
if err != errInvalidArgument {
t.Fatalf("Expecting error, got %s", err)
}
_, _, err = waitForFormatErasure(true, nil, 1, 1, 16, "")
if err != errInvalidArgument {
t.Fatalf("Expecting error, got %s", err)
}
// Initializes all erasure disks
storageDisks, format, err := waitForFormatErasure(true, endpoints, 1, 1, 16, "")
if err != nil {
t.Fatalf("Unable to format disks for erasure, %s", err)
}
if _, err := newErasureSets(ctx, endpoints, storageDisks, format); err != nil {
t.Fatalf("Unable to initialize erasure")
}
}
// TestHashedLayer - tests the hashed layer which will be returned
// consistently for a given object name.
func TestHashedLayer(t *testing.T) {
// Test distribution with 16 sets.
var objs [16]*erasureObjects
for i := range objs {
objs[i] = &erasureObjects{}
}
sets := &erasureSets{sets: objs[:], distributionAlgo: "CRCMOD"}
testCases := []struct {
objectName string
expectedObj *erasureObjects
}{
// cases which should pass the test.
// passing in valid object name.
{"object", objs[12]},
{"The Shining Script <v1>.pdf", objs[14]},
{"Cost Benefit Analysis (2009-2010).pptx", objs[13]},
{"117Gn8rfHL2ACARPAhaFd0AGzic9pUbIA/5OCn5A", objs[1]},
{"SHØRT", objs[9]},
{"There are far too many object names, and far too few bucket names!", objs[13]},
{"a/b/c/", objs[1]},
{"/a/b/c", objs[4]},
{string([]byte{0xff, 0xfe, 0xfd}), objs[13]},
}
// Tests hashing order to be consistent.
for i, testCase := range testCases {
gotObj := sets.getHashedSet(testCase.objectName)
if gotObj != testCase.expectedObj {
t.Errorf("Test case %d: Expected \"%#v\" but failed \"%#v\"", i+1, testCase.expectedObj, gotObj)
}
}
}