f21d650ed4
This PR refactors the way we use buffers for O_DIRECT and to re-use those buffers for messagepack reader writer. After some extensive benchmarking found that not all objects have this benefit, and only objects smaller than 64KiB see this benefit overall. Benefits are seen from almost all objects from 1KiB - 32KiB Beyond this no objects see benefit with bulk call approach as the latency of bytes sent over the wire v/s streaming content directly from disk negate each other with no remarkable benefits. All other optimizations include reuse of msgp.Reader, msgp.Writer using sync.Pool's for all internode calls.
365 lines
11 KiB
Go
365 lines
11 KiB
Go
/*
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* MinIO Cloud Storage, (C) 2016-2020 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 cmd
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import (
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"bytes"
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"context"
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"fmt"
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"os"
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"path/filepath"
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"testing"
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"time"
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"github.com/minio/minio/pkg/madmin"
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)
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// validates functionality provided to find most common
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// time occurrence from a list of time.
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func TestCommonTime(t *testing.T) {
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// List of test cases for common modTime.
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testCases := []struct {
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times []time.Time
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time time.Time
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}{
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{
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// 1. Tests common times when slice has varying time elements.
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[]time.Time{
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time.Unix(0, 1).UTC(),
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time.Unix(0, 2).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 2).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 1).UTC(),
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}, time.Unix(0, 3).UTC(),
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},
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{
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// 2. Tests common time obtained when all elements are equal.
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[]time.Time{
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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}, time.Unix(0, 3).UTC(),
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},
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{
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// 3. Tests common time obtained when elements have a mixture
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// of sentinel values.
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[]time.Time{
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time.Unix(0, 3).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 2).UTC(),
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time.Unix(0, 1).UTC(),
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time.Unix(0, 3).UTC(),
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time.Unix(0, 4).UTC(),
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time.Unix(0, 3).UTC(),
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timeSentinel,
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timeSentinel,
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timeSentinel,
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}, time.Unix(0, 3).UTC(),
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},
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}
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// Tests all the testcases, and validates them against expected
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// common modtime. Tests fail if modtime does not match.
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for i, testCase := range testCases {
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// Obtain a common mod time from modTimes slice.
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ctime, _ := commonTime(testCase.times)
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if !testCase.time.Equal(ctime) {
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t.Fatalf("Test case %d, expect to pass but failed. Wanted modTime: %s, got modTime: %s\n", i+1, testCase.time, ctime)
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}
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}
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}
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// TestListOnlineDisks - checks if listOnlineDisks and outDatedDisks
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// are consistent with each other.
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func TestListOnlineDisks(t *testing.T) {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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obj, disks, err := prepareErasure16(ctx)
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if err != nil {
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t.Fatalf("Prepare Erasure backend failed - %v", err)
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}
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defer obj.Shutdown(context.Background())
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defer removeRoots(disks)
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type tamperKind int
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const (
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noTamper tamperKind = iota
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deletePart tamperKind = iota
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corruptPart tamperKind = iota
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)
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threeNanoSecs := time.Unix(0, 3).UTC()
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fourNanoSecs := time.Unix(0, 4).UTC()
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modTimesThreeNone := []time.Time{
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threeNanoSecs, threeNanoSecs, threeNanoSecs, threeNanoSecs,
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threeNanoSecs, threeNanoSecs, threeNanoSecs,
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timeSentinel, timeSentinel, timeSentinel, timeSentinel,
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timeSentinel, timeSentinel, timeSentinel, timeSentinel,
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timeSentinel,
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}
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modTimesThreeFour := []time.Time{
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threeNanoSecs, threeNanoSecs, threeNanoSecs, threeNanoSecs,
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threeNanoSecs, threeNanoSecs, threeNanoSecs, threeNanoSecs,
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fourNanoSecs, fourNanoSecs, fourNanoSecs, fourNanoSecs,
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fourNanoSecs, fourNanoSecs, fourNanoSecs, fourNanoSecs,
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}
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testCases := []struct {
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modTimes []time.Time
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expectedTime time.Time
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errs []error
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_tamperBackend tamperKind
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}{
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{
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modTimes: modTimesThreeFour,
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expectedTime: fourNanoSecs,
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errs: []error{
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nil, nil, nil, nil, nil, nil, nil, nil, nil,
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nil, nil, nil, nil, nil, nil, nil,
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},
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_tamperBackend: noTamper,
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},
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{
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modTimes: modTimesThreeNone,
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expectedTime: threeNanoSecs,
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errs: []error{
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// Disks that have a valid xl.meta.
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nil, nil, nil, nil, nil, nil, nil,
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// Majority of disks don't have xl.meta.
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errFileNotFound, errFileNotFound,
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errFileNotFound, errFileNotFound,
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errFileNotFound, errDiskAccessDenied,
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errDiskNotFound, errFileNotFound,
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errFileNotFound,
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},
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_tamperBackend: deletePart,
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},
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{
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modTimes: modTimesThreeNone,
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expectedTime: threeNanoSecs,
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errs: []error{
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// Disks that have a valid xl.meta.
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nil, nil, nil, nil, nil, nil, nil,
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// Majority of disks don't have xl.meta.
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errFileNotFound, errFileNotFound,
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errFileNotFound, errFileNotFound,
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errFileNotFound, errDiskAccessDenied,
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errDiskNotFound, errFileNotFound,
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errFileNotFound,
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},
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_tamperBackend: corruptPart,
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},
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}
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bucket := "bucket"
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err = obj.MakeBucketWithLocation(ctx, "bucket", BucketOptions{})
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if err != nil {
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t.Fatalf("Failed to make a bucket %v", err)
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}
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object := "object"
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data := bytes.Repeat([]byte("a"), 1024)
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z := obj.(*erasureServerPools)
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erasureDisks := z.serverPools[0].sets[0].getDisks()
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for i, test := range testCases {
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_, err = obj.PutObject(ctx, bucket, object, mustGetPutObjReader(t, bytes.NewReader(data), int64(len(data)), "", ""), ObjectOptions{})
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if err != nil {
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t.Fatalf("Failed to putObject %v", err)
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}
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partsMetadata, errs := readAllFileInfo(ctx, erasureDisks, bucket, object, "", false)
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fi, err := getLatestFileInfo(ctx, partsMetadata, errs)
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if err != nil {
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t.Fatalf("Failed to getLatestFileInfo %v", err)
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}
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for j := range partsMetadata {
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if errs[j] != nil {
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t.Fatalf("Test %d: expected error to be nil: %s", i+1, errs[j])
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}
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partsMetadata[j].ModTime = test.modTimes[j]
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}
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tamperedIndex := -1
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switch test._tamperBackend {
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case deletePart:
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for index, err := range test.errs {
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if err != nil {
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continue
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}
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// Remove a part from a disk
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// which has a valid xl.meta,
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// and check if that disk
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// appears in outDatedDisks.
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tamperedIndex = index
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dErr := erasureDisks[index].Delete(context.Background(), bucket, pathJoin(object, fi.DataDir, "part.1"), false)
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if dErr != nil {
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t.Fatalf("Test %d: Failed to delete %s - %v", i+1,
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filepath.Join(object, "part.1"), dErr)
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}
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break
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}
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case corruptPart:
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for index, err := range test.errs {
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if err != nil {
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continue
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}
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// Corrupt a part from a disk
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// which has a valid xl.meta,
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// and check if that disk
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// appears in outDatedDisks.
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tamperedIndex = index
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filePath := pathJoin(erasureDisks[index].String(), bucket, object, fi.DataDir, "part.1")
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f, err := os.OpenFile(filePath, os.O_WRONLY|os.O_SYNC, 0)
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if err != nil {
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t.Fatalf("Failed to open %s: %s\n", filePath, err)
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}
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f.Write([]byte("oops")) // Will cause bitrot error
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f.Close()
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break
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}
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}
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onlineDisks, modTime := listOnlineDisks(erasureDisks, partsMetadata, test.errs)
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if !modTime.Equal(test.expectedTime) {
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t.Fatalf("Test %d: Expected modTime to be equal to %v but was found to be %v",
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i+1, test.expectedTime, modTime)
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}
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availableDisks, newErrs := disksWithAllParts(ctx, onlineDisks, partsMetadata, test.errs, bucket, object, madmin.HealDeepScan)
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test.errs = newErrs
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if test._tamperBackend != noTamper {
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if tamperedIndex != -1 && availableDisks[tamperedIndex] != nil {
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t.Fatalf("Test %d: disk (%v) with part.1 missing is not a disk with available data",
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i+1, erasureDisks[tamperedIndex])
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}
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}
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}
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}
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func TestDisksWithAllParts(t *testing.T) {
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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obj, disks, err := prepareErasure16(ctx)
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if err != nil {
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t.Fatalf("Prepare Erasure backend failed - %v", err)
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}
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defer obj.Shutdown(context.Background())
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defer removeRoots(disks)
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bucket := "bucket"
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object := "object"
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// make data with more than one part
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partCount := 3
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data := bytes.Repeat([]byte("a"), 6*1024*1024*partCount)
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z := obj.(*erasureServerPools)
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s := z.serverPools[0].sets[0]
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erasureDisks := s.getDisks()
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err = obj.MakeBucketWithLocation(ctx, "bucket", BucketOptions{})
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if err != nil {
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t.Fatalf("Failed to make a bucket %v", err)
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}
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_, err = obj.PutObject(ctx, bucket, object, mustGetPutObjReader(t, bytes.NewReader(data), int64(len(data)), "", ""), ObjectOptions{})
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if err != nil {
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t.Fatalf("Failed to putObject %v", err)
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}
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_, errs := readAllFileInfo(ctx, erasureDisks, bucket, object, "", false)
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readQuorum := len(erasureDisks) / 2
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if reducedErr := reduceReadQuorumErrs(ctx, errs, objectOpIgnoredErrs, readQuorum); reducedErr != nil {
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t.Fatalf("Failed to read xl meta data %v", reducedErr)
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}
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// Test that all disks are returned without any failures with
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// unmodified meta data
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partsMetadata, errs := readAllFileInfo(ctx, erasureDisks, bucket, object, "", false)
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if err != nil {
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t.Fatalf("Failed to read xl meta data %v", err)
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}
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filteredDisks, errs := disksWithAllParts(ctx, erasureDisks, partsMetadata, errs, bucket, object, madmin.HealDeepScan)
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if len(filteredDisks) != len(erasureDisks) {
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t.Errorf("Unexpected number of disks: %d", len(filteredDisks))
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}
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for diskIndex, disk := range filteredDisks {
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if errs[diskIndex] != nil {
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t.Errorf("Unexpected error %s", errs[diskIndex])
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}
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if disk == nil {
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t.Errorf("Disk erroneously filtered, diskIndex: %d", diskIndex)
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}
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}
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diskFailures := make(map[int]string)
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// key = disk index, value = part name with hash mismatch
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diskFailures[0] = "part.1"
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diskFailures[3] = "part.1"
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diskFailures[15] = "part.1"
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for diskIndex, partName := range diskFailures {
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for i := range partsMetadata[diskIndex].Erasure.Checksums {
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if fmt.Sprintf("part.%d", i+1) == partName {
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filePath := pathJoin(erasureDisks[diskIndex].String(), bucket, object, partsMetadata[diskIndex].DataDir, partName)
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f, err := os.OpenFile(filePath, os.O_WRONLY|os.O_SYNC, 0)
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if err != nil {
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t.Fatalf("Failed to open %s: %s\n", filePath, err)
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}
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f.Write([]byte("oops")) // Will cause bitrot error
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f.Close()
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}
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}
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}
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errs = make([]error, len(erasureDisks))
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filteredDisks, errs = disksWithAllParts(ctx, erasureDisks, partsMetadata, errs, bucket, object, madmin.HealDeepScan)
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if len(filteredDisks) != len(erasureDisks) {
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t.Errorf("Unexpected number of disks: %d", len(filteredDisks))
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}
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for diskIndex, disk := range filteredDisks {
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if _, ok := diskFailures[diskIndex]; ok {
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if disk != nil {
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t.Errorf("Disk not filtered as expected, disk: %d", diskIndex)
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}
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if errs[diskIndex] == nil {
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t.Errorf("Expected error not received, diskIndex: %d", diskIndex)
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}
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} else {
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if disk == nil {
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t.Errorf("Disk erroneously filtered, diskIndex: %d", diskIndex)
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}
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if errs[diskIndex] != nil {
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t.Errorf("Unexpected error, %s, diskIndex: %d", errs[diskIndex], diskIndex)
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}
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}
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}
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}
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