speedup getFormatErasureInQuorum use driveCount (#14239)

startup speed-up, currently getFormatErasureInQuorum()
would spend up to 2-3secs when there are 3000+ drives
for example in a setup, simplify this implementation
to use drive counts.

cmd/erasure-sets.go

@@ -1211,6 +1211,9 @@ func formatsToDrivesInfo(endpoints Endpoints, formats []*formatErasureV3, sErrs
 // If it is a single node Erasure and all disks are root disks, it is most likely a test setup, else it is a production setup.
 // On a test setup we allow creation of format.json on root disks to help with dev/testing.
 func isTestSetup(infos []DiskInfo, errs []error) bool {
+	if globalIsCICD {
+		return true
+	}
 	rootDiskCount := 0
 	for i := range errs {
 		if errs[i] == nil || errs[i] == errUnformattedDisk {
@@ -1245,6 +1248,9 @@ func getHealDiskInfos(storageDisks []StorageAPI, errs []error) ([]DiskInfo, []er
 
 // Mark root disks as down so as not to heal them.
 func markRootDisksAsDown(storageDisks []StorageAPI, errs []error) {
+	if globalIsCICD {
+		return
+	}
 	var infos []DiskInfo
 	infos, errs = getHealDiskInfos(storageDisks, errs)
 	if !isTestSetup(infos, errs) {

cmd/format-erasure.go

@@ -19,8 +19,6 @@ package cmd
 
 import (
 	"context"
-	"crypto/sha256"
-	"encoding/hex"
 	"encoding/json"
 	"errors"
 	"fmt"
@@ -124,6 +122,13 @@ type formatErasureV3 struct {
 	} `json:"xl"`
 }
 
+func (f *formatErasureV3) Drives() (drives int) {
+	for _, set := range f.Erasure.Sets {
+		drives += len(set)
+	}
+	return drives
+}
+
 func (f *formatErasureV3) Clone() *formatErasureV3 {
 	b, err := json.Marshal(f)
 	if err != nil {
@@ -545,43 +550,36 @@ func formatErasureFixLocalDeploymentID(endpoints Endpoints, storageDisks []Stora
 
 // Get backend Erasure format in quorum `format.json`.
 func getFormatErasureInQuorum(formats []*formatErasureV3) (*formatErasureV3, error) {
-	formatHashes := make([]string, len(formats))
+	formatCountMap := make(map[int]int, len(formats))
-	for i, format := range formats {
+	for _, format := range formats {
 		if format == nil {
 			continue
 		}
-		h := sha256.New()
+		formatCountMap[format.Drives()]++
-		for _, set := range format.Erasure.Sets {
-			for _, diskID := range set {
-				h.Write([]byte(diskID))
-			}
-		}
-		formatHashes[i] = hex.EncodeToString(h.Sum(nil))
 	}
 
-	formatCountMap := make(map[string]int)
+	maxDrives := 0
-	for _, hash := range formatHashes {
-		if hash == "" {
-			continue
-		}
-		formatCountMap[hash]++
-	}
-
-	maxHash := ""
 	maxCount := 0
-	for hash, count := range formatCountMap {
+	for drives, count := range formatCountMap {
 		if count > maxCount {
 			maxCount = count
-			maxHash = hash
+			maxDrives = drives
 		}
 	}
 
+	if maxDrives == 0 {
+		return nil, errErasureReadQuorum
+	}
+
 	if maxCount < len(formats)/2 {
 		return nil, errErasureReadQuorum
 	}
 
-	for i, hash := range formatHashes {
+	for i, format := range formats {
-		if hash == maxHash {
+		if format == nil {
+			continue
+		}
+		if format.Drives() == maxDrives {
 			format := formats[i].Clone()
 			format.Erasure.This = ""
 			return format, nil
@@ -624,43 +622,6 @@ func formatErasureV3Check(reference *formatErasureV3, format *formatErasureV3) e
 	return fmt.Errorf("Disk ID %s not found in any disk sets %s", this, format.Erasure.Sets)
 }
 
-// Initializes meta volume only on local storage disks.
-func initErasureMetaVolumesInLocalDisks(storageDisks []StorageAPI, formats []*formatErasureV3) error {
-	// Compute the local disks eligible for meta volumes (re)initialization
-	disksToInit := make([]StorageAPI, 0, len(storageDisks))
-	for index := range storageDisks {
-		if formats[index] == nil || storageDisks[index] == nil || !storageDisks[index].IsLocal() {
-			// Ignore create meta volume on disks which are not found or not local.
-			continue
-		}
-		disksToInit = append(disksToInit, storageDisks[index])
-	}
-
-	// Initialize errs to collect errors inside go-routine.
-	g := errgroup.WithNErrs(len(disksToInit))
-
-	// Initialize all disks in parallel.
-	for index := range disksToInit {
-		// Initialize a new index variable in each loop so each
-		// goroutine will return its own instance of index variable.
-		index := index
-		g.Go(func() error {
-			return makeFormatErasureMetaVolumes(disksToInit[index])
-		}, index)
-	}
-
-	// Return upon first error.
-	for _, err := range g.Wait() {
-		if err == nil {
-			continue
-		}
-		return toObjectErr(err, minioMetaBucket)
-	}
-
-	// Return success here.
-	return nil
-}
-
 // saveFormatErasureAll - populates `format.json` on disks in its order.
 func saveFormatErasureAll(ctx context.Context, storageDisks []StorageAPI, formats []*formatErasureV3) error {
 	g := errgroup.WithNErrs(len(storageDisks))

cmd/format-erasure_test.go

@@ -18,6 +18,8 @@
 package cmd
 
 import (
+	"crypto/sha256"
+	"encoding/hex"
 	"encoding/json"
 	"errors"
 	"io/ioutil"
@@ -54,10 +56,6 @@ func TestFixFormatV3(t *testing.T) {
 		formats[j] = newFormat
 	}
 
-	if err = initErasureMetaVolumesInLocalDisks(storageDisks, formats); err != nil {
-		t.Fatal(err)
-	}
-
 	formats[1] = nil
 	expThis := formats[2].Erasure.This
 	formats[2].Erasure.This = ""
@@ -342,6 +340,102 @@ func TestGetFormatErasureInQuorumCheck(t *testing.T) {
 	}
 }
 
+// Get backend Erasure format in quorum `format.json`.
+func getFormatErasureInQuorumOld(formats []*formatErasureV3) (*formatErasureV3, error) {
+	formatHashes := make([]string, len(formats))
+	for i, format := range formats {
+		if format == nil {
+			continue
+		}
+		h := sha256.New()
+		for _, set := range format.Erasure.Sets {
+			for _, diskID := range set {
+				h.Write([]byte(diskID))
+			}
+		}
+		formatHashes[i] = hex.EncodeToString(h.Sum(nil))
+	}
+
+	formatCountMap := make(map[string]int)
+	for _, hash := range formatHashes {
+		if hash == "" {
+			continue
+		}
+		formatCountMap[hash]++
+	}
+
+	maxHash := ""
+	maxCount := 0
+	for hash, count := range formatCountMap {
+		if count > maxCount {
+			maxCount = count
+			maxHash = hash
+		}
+	}
+
+	if maxCount < len(formats)/2 {
+		return nil, errErasureReadQuorum
+	}
+
+	for i, hash := range formatHashes {
+		if hash == maxHash {
+			format := formats[i].Clone()
+			format.Erasure.This = ""
+			return format, nil
+		}
+	}
+
+	return nil, errErasureReadQuorum
+}
+
+func BenchmarkGetFormatErasureInQuorumOld(b *testing.B) {
+	setCount := 200
+	setDriveCount := 15
+
+	format := newFormatErasureV3(setCount, setDriveCount)
+	format.Erasure.DistributionAlgo = formatErasureVersionV2DistributionAlgoV1
+	formats := make([]*formatErasureV3, 15*200)
+
+	for i := 0; i < setCount; i++ {
+		for j := 0; j < setDriveCount; j++ {
+			newFormat := format.Clone()
+			newFormat.Erasure.This = format.Erasure.Sets[i][j]
+			formats[i*setDriveCount+j] = newFormat
+		}
+	}
+
+	b.ResetTimer()
+	b.ReportAllocs()
+
+	for i := 0; i < b.N; i++ {
+		_, _ = getFormatErasureInQuorumOld(formats)
+	}
+}
+
+func BenchmarkGetFormatErasureInQuorum(b *testing.B) {
+	setCount := 200
+	setDriveCount := 15
+
+	format := newFormatErasureV3(setCount, setDriveCount)
+	format.Erasure.DistributionAlgo = formatErasureVersionV2DistributionAlgoV1
+	formats := make([]*formatErasureV3, 15*200)
+
+	for i := 0; i < setCount; i++ {
+		for j := 0; j < setDriveCount; j++ {
+			newFormat := format.Clone()
+			newFormat.Erasure.This = format.Erasure.Sets[i][j]
+			formats[i*setDriveCount+j] = newFormat
+		}
+	}
+
+	b.ResetTimer()
+	b.ReportAllocs()
+
+	for i := 0; i < b.N; i++ {
+		_, _ = getFormatErasureInQuorum(formats)
+	}
+}
+
 // Tests formatErasureGetDeploymentID()
 func TestGetErasureID(t *testing.T) {
 	setCount := 2

cmd/prepare-storage.go

@@ -185,7 +185,7 @@ func connectLoadInitFormats(retryCount int, firstDisk bool, endpoints Endpoints,
 
 	for i, err := range errs {
 		if err != nil {
-			if err == errDiskNotFound && retryCount >= 5 {
+			if err == errDiskNotFound && retryCount >= 10 {
 				logger.Error("Unable to connect to %s: %v", endpoints[i], isServerResolvable(endpoints[i], time.Second))
 			} else {
 				logger.Error("Unable to use the drive %s: %v", endpoints[i], err)
@@ -202,7 +202,7 @@ func connectLoadInitFormats(retryCount int, firstDisk bool, endpoints Endpoints,
 	// Check if we have
 	for i, sErr := range sErrs {
 		// print the error, nonetheless, which is perhaps unhandled
-		if sErr != errUnformattedDisk && sErr != errDiskNotFound && retryCount >= 5 {
+		if sErr != errUnformattedDisk && sErr != errDiskNotFound && retryCount >= 10 {
 			if sErr != nil {
 				logger.Error("Unable to read 'format.json' from %s: %v\n", endpoints[i], sErr)
 			}
@@ -315,23 +315,28 @@ func waitForFormatErasure(firstDisk bool, endpoints Endpoints, poolCount, setCou
 	tries++ // tried already once
 
 	// Wait on each try for an update.
-	ticker := time.NewTicker(250 * time.Millisecond)
+	ticker := time.NewTicker(150 * time.Millisecond)
 	defer ticker.Stop()
 
 	for {
 		select {
 		case <-ticker.C:
+			if tries == 10 {
+				// Reset the tries count such that we log only for every 10 retries.
+				tries = 1
+			}
+
 			storageDisks, format, err := connectLoadInitFormats(tries, firstDisk, endpoints, poolCount, setCount, setDriveCount, deploymentID, distributionAlgo)
 			if err != nil {
 				tries++
 				switch err {
 				case errNotFirstDisk:
 					// Fresh setup, wait for first server to be up.
-					logger.Info("Waiting for the first server to format the disks.")
+					logger.Info("Waiting for the first server to format the disks (elapsed %s)\n", getElapsedTime())
 					continue
 				case errFirstDiskWait:
 					// Fresh setup, wait for other servers to come up.
-					logger.Info("Waiting for all other servers to be online to format the disks.")
+					logger.Info("Waiting for all other servers to be online to format the disks (elapses %s)\n", getElapsedTime())
 					continue
 				case errErasureReadQuorum:
 					// no quorum available continue to wait for minimum number of servers.

cmd/server-main.go

@@ -531,10 +531,24 @@ func serverMain(ctx *cli.Context) {
 		}
 	}
 
+	if globalBrowserEnabled {
+		srv, err := initConsoleServer()
+		if err != nil {
+			logger.FatalIf(err, "Unable to initialize console service")
+		}
+
+		setConsoleSrv(srv)
+
+		go func() {
+			logger.FatalIf(newConsoleServerFn().Serve(), "Unable to initialize console server")
+		}()
+	}
+
 	newObject, err := newObjectLayer(GlobalContext, globalEndpoints)
 	if err != nil {
 		logFatalErrs(err, Endpoint{}, true)
 	}
+
 	logger.SetDeploymentID(globalDeploymentID)
 
 	// Enable background operations for erasure coding
@@ -624,19 +638,6 @@ func serverMain(ctx *cli.Context) {
 		logStartupMessage(color.RedBold("WARNING: Strict AWS S3 compatible incoming PUT, POST content payload validation is turned off, caution is advised do not use in production"))
 	}
 
-	if globalBrowserEnabled {
-		srv, err := initConsoleServer()
-		if err != nil {
-			logger.FatalIf(err, "Unable to initialize console service")
-		}
-
-		setConsoleSrv(srv)
-
-		go func() {
-			logger.FatalIf(newConsoleServerFn().Serve(), "Unable to initialize console server")
-		}()
-	}
-
 	if serverDebugLog {
 		logger.Info("== DEBUG Mode enabled ==")
 		logger.Info("Currently set environment settings:")

cmd/update.go

@@ -124,7 +124,7 @@ func GetCurrentReleaseTime() (releaseTime time.Time, err error) {
 //     "/.dockerenv":      "file",
 //
 func IsDocker() bool {
-	if env.Get("MINIO_CI_CD", "") == "" {
+	if !globalIsCICD {
 		_, err := os.Stat("/.dockerenv")
 		if osIsNotExist(err) {
 			return false
@@ -140,7 +140,7 @@ func IsDocker() bool {
 
 // IsDCOS returns true if minio is running in DCOS.
 func IsDCOS() bool {
-	if env.Get("MINIO_CI_CD", "") == "" {
+	if !globalIsCICD {
 		// http://mesos.apache.org/documentation/latest/docker-containerizer/
 		// Mesos docker containerizer sets this value
 		return env.Get("MESOS_CONTAINER_NAME", "") != ""
@@ -150,7 +150,7 @@ func IsDCOS() bool {
 
 // IsKubernetes returns true if minio is running in kubernetes.
 func IsKubernetes() bool {
-	if env.Get("MINIO_CI_CD", "") == "" {
+	if !globalIsCICD {
 		// Kubernetes env used to validate if we are
 		// indeed running inside a kubernetes pod
 		// is KUBERNETES_SERVICE_HOST

cmd/xl-storage.go

@@ -216,14 +216,10 @@ func newXLStorage(ep Endpoint) (s *xlStorage, err error) {
 	if globalIsCICD {
 		rootDisk = true
 	} else {
-		rootDisk, err = disk.IsRootDisk(path, SlashSeparator)
+		if globalRootDiskThreshold > 0 {
-		if err != nil {
+			// When you do not want rely on automatic verification
-			return nil, err
+			// of rejecting root disks, we need to add this threshold
-		}
+			// to ensure that root disks are ignored properly.
-		if !rootDisk && globalRootDiskThreshold > 0 {
-			// If for some reason we couldn't detect the root disk
-			// use - MINIO_ROOTDISK_THRESHOLD_SIZE to figure out if
-			// this disk is a root disk.
 			info, err := disk.GetInfo(path)
 			if err != nil {
 				return nil, err
@@ -232,6 +228,14 @@ func newXLStorage(ep Endpoint) (s *xlStorage, err error) {
 			// treat those disks with size less than or equal to the
 			// threshold as rootDisks.
 			rootDisk = info.Total <= globalRootDiskThreshold
+		} else {
+			// When root disk threshold is not set, we rely
+			// on automatic detection - does not work in
+			// container environments.
+			rootDisk, err = disk.IsRootDisk(path, SlashSeparator)
+			if err != nil {
+				return nil, err
+			}
 		}
 	}