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3047121255
After #10594 let's invalidate the bloom filters to force the next cycles to go through all data. There is a small chance that the linked PR could have caused missing bloom filter data. This will invalidate the current bloom filters and make the crawler go through everything.
625 lines
15 KiB
Go
625 lines
15 KiB
Go
/*
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* MinIO Cloud Storage, (C) 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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"bufio"
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"bytes"
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"context"
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"encoding/binary"
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"errors"
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"io"
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"io/ioutil"
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"os"
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"path"
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"sort"
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"strings"
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"sync"
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"time"
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"github.com/minio/minio/cmd/config"
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"github.com/minio/minio/cmd/logger"
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"github.com/minio/minio/pkg/color"
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"github.com/minio/minio/pkg/env"
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"github.com/willf/bloom"
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)
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const (
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// Estimate bloom filter size. With this many items
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dataUpdateTrackerEstItems = 1000000
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// ... we want this false positive rate:
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dataUpdateTrackerFP = 0.99
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dataUpdateTrackerQueueSize = 10000
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dataUpdateTrackerFilename = dataUsageBucket + SlashSeparator + ".tracker.bin"
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dataUpdateTrackerVersion = 3
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dataUpdateTrackerSaveInterval = 5 * time.Minute
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)
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var (
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objectUpdatedCh chan<- string
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intDataUpdateTracker *dataUpdateTracker
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)
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func init() {
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intDataUpdateTracker = newDataUpdateTracker()
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objectUpdatedCh = intDataUpdateTracker.input
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}
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type dataUpdateTracker struct {
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mu sync.Mutex
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input chan string
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save chan struct{}
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debug bool
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saveExited chan struct{}
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dirty bool
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Current dataUpdateFilter
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History dataUpdateTrackerHistory
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Saved time.Time
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}
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// newDataUpdateTracker returns a dataUpdateTracker with default settings.
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func newDataUpdateTracker() *dataUpdateTracker {
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d := &dataUpdateTracker{
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Current: dataUpdateFilter{
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idx: 1,
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},
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debug: env.Get(envDataUsageCrawlDebug, config.EnableOff) == config.EnableOn,
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input: make(chan string, dataUpdateTrackerQueueSize),
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save: make(chan struct{}, 1),
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saveExited: make(chan struct{}),
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}
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d.Current.bf = d.newBloomFilter()
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d.dirty = true
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return d
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}
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type dataUpdateTrackerHistory []dataUpdateFilter
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type dataUpdateFilter struct {
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idx uint64
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bf bloomFilter
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}
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type bloomFilter struct {
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*bloom.BloomFilter
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}
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// emptyBloomFilter returns an empty bloom filter.
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func emptyBloomFilter() bloomFilter {
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return bloomFilter{BloomFilter: &bloom.BloomFilter{}}
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}
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// containsDir returns whether the bloom filter contains a directory.
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// Note that objects in XL mode are also considered directories.
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func (b bloomFilter) containsDir(in string) bool {
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split := splitPathDeterministic(path.Clean(in))
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if len(split) == 0 {
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return false
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}
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return b.TestString(hashPath(path.Join(split...)).String())
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}
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// bytes returns the bloom filter serialized as a byte slice.
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func (b *bloomFilter) bytes() []byte {
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if b == nil || b.BloomFilter == nil {
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return nil
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}
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var buf bytes.Buffer
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_, err := b.WriteTo(&buf)
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if err != nil {
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logger.LogIf(GlobalContext, err)
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return nil
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}
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return buf.Bytes()
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}
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// sort the dataUpdateTrackerHistory, newest first.
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// Returns whether the history is complete.
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func (d dataUpdateTrackerHistory) sort() bool {
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if len(d) == 0 {
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return true
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}
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sort.Slice(d, func(i, j int) bool {
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return d[i].idx > d[j].idx
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})
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return d[0].idx-d[len(d)-1].idx == uint64(len(d))
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}
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// removeOlderThan will remove entries older than index 'n'.
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func (d *dataUpdateTrackerHistory) removeOlderThan(n uint64) {
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d.sort()
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dd := *d
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end := len(dd)
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for i := end - 1; i >= 0; i-- {
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if dd[i].idx < n {
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end = i
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}
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}
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dd = dd[:end]
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*d = dd
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}
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// newBloomFilter returns a new bloom filter with default settings.
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func (d *dataUpdateTracker) newBloomFilter() bloomFilter {
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return bloomFilter{bloom.NewWithEstimates(dataUpdateTrackerEstItems, dataUpdateTrackerFP)}
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}
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// current returns the current index.
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func (d *dataUpdateTracker) current() uint64 {
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d.mu.Lock()
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defer d.mu.Unlock()
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return d.Current.idx
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}
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// start will load the current data from the drives start collecting information and
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// start a saver goroutine.
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// All of these will exit when the context is canceled.
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func (d *dataUpdateTracker) start(ctx context.Context, drives ...string) {
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if len(drives) <= 0 {
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logger.LogIf(ctx, errors.New("dataUpdateTracker.start: No drives specified"))
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return
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}
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d.load(ctx, drives...)
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go d.startCollector(ctx)
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// startSaver will unlock.
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d.mu.Lock()
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go d.startSaver(ctx, dataUpdateTrackerSaveInterval, drives)
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}
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// load will attempt to load data tracking information from the supplied drives.
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// The data will only be loaded if d.Saved is older than the one found on disk.
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// The newest working cache will be kept in d.
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// If no valid data usage tracker can be found d will remain unchanged.
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// If object is shared the caller should lock it.
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func (d *dataUpdateTracker) load(ctx context.Context, drives ...string) {
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if len(drives) <= 0 {
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logger.LogIf(ctx, errors.New("dataUpdateTracker.load: No drives specified"))
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return
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}
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for _, drive := range drives {
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cacheFormatPath := pathJoin(drive, dataUpdateTrackerFilename)
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f, err := os.Open(cacheFormatPath)
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if err != nil {
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if os.IsNotExist(err) {
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continue
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}
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logger.LogIf(ctx, err)
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continue
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}
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err = d.deserialize(f, d.Saved)
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if err != nil && err != io.EOF && err != io.ErrUnexpectedEOF {
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logger.LogIf(ctx, err)
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}
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f.Close()
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}
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}
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// startSaver will start a saver that will write d to all supplied drives at specific intervals.
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// 'd' must be write locked when started and will be unlocked.
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// The saver will save and exit when supplied context is closed.
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func (d *dataUpdateTracker) startSaver(ctx context.Context, interval time.Duration, drives []string) {
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saveNow := d.save
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exited := make(chan struct{})
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d.saveExited = exited
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d.mu.Unlock()
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t := time.NewTicker(interval)
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defer t.Stop()
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defer close(exited)
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var buf bytes.Buffer
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for {
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var exit bool
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select {
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case <-ctx.Done():
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exit = true
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case <-t.C:
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case <-saveNow:
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}
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buf.Reset()
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d.mu.Lock()
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if !d.dirty {
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d.mu.Unlock()
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if exit {
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return
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}
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continue
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}
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d.Saved = UTCNow()
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err := d.serialize(&buf)
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if d.debug {
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logger.Info(color.Green("dataUpdateTracker:")+" Saving: %v bytes, Current idx: %v", buf.Len(), d.Current.idx)
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}
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d.dirty = false
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d.mu.Unlock()
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if err != nil {
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logger.LogIf(ctx, err, "Error serializing usage tracker data")
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if exit {
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return
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}
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continue
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}
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if buf.Len() == 0 {
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logger.LogIf(ctx, errors.New("zero sized output, skipping save"))
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continue
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}
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for _, drive := range drives {
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cacheFormatPath := pathJoin(drive, dataUpdateTrackerFilename)
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err := ioutil.WriteFile(cacheFormatPath, buf.Bytes(), os.ModePerm)
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if err != nil {
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if os.IsNotExist(err) {
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continue
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}
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logger.LogIf(ctx, err)
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continue
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}
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}
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if exit {
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return
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}
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}
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}
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// serialize all data in d to dst.
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// Caller should hold lock if d is expected to be shared.
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// If an error is returned, there will likely be partial data written to dst.
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func (d *dataUpdateTracker) serialize(dst io.Writer) (err error) {
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ctx := GlobalContext
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var tmp [8]byte
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o := bufio.NewWriter(dst)
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defer func() {
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if err == nil {
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err = o.Flush()
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}
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}()
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// Version
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if err := o.WriteByte(dataUpdateTrackerVersion); err != nil {
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if d.debug {
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logger.LogIf(ctx, err)
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}
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return err
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}
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// Timestamp.
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binary.LittleEndian.PutUint64(tmp[:], uint64(d.Saved.Unix()))
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if _, err := o.Write(tmp[:]); err != nil {
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if d.debug {
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logger.LogIf(ctx, err)
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}
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return err
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}
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// Current
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binary.LittleEndian.PutUint64(tmp[:], d.Current.idx)
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if _, err := o.Write(tmp[:]); err != nil {
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if d.debug {
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logger.LogIf(ctx, err)
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}
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return err
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}
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if _, err := d.Current.bf.WriteTo(o); err != nil {
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if d.debug {
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logger.LogIf(ctx, err)
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}
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return err
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}
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// History
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binary.LittleEndian.PutUint64(tmp[:], uint64(len(d.History)))
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if _, err := o.Write(tmp[:]); err != nil {
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if d.debug {
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logger.LogIf(ctx, err)
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}
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return err
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}
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for _, bf := range d.History {
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// Current
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binary.LittleEndian.PutUint64(tmp[:], bf.idx)
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if _, err := o.Write(tmp[:]); err != nil {
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if d.debug {
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logger.LogIf(ctx, err)
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}
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return err
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}
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if _, err := bf.bf.WriteTo(o); err != nil {
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if d.debug {
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logger.LogIf(ctx, err)
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}
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return err
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}
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}
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return nil
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}
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// deserialize will deserialize the supplied input if the input is newer than the supplied time.
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func (d *dataUpdateTracker) deserialize(src io.Reader, newerThan time.Time) error {
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ctx := GlobalContext
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var dst dataUpdateTracker
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var tmp [8]byte
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// Version
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if _, err := io.ReadFull(src, tmp[:1]); err != nil {
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if d.debug {
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if err != io.EOF {
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logger.LogIf(ctx, err)
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}
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}
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return err
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}
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switch tmp[0] {
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case 1, 2:
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logger.Info(color.Green("dataUpdateTracker: ") + "deprecated data version, updating.")
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return nil
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case dataUpdateTrackerVersion:
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default:
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return errors.New("dataUpdateTracker: Unknown data version")
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}
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// Timestamp.
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if _, err := io.ReadFull(src, tmp[:8]); err != nil {
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if d.debug {
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logger.LogIf(ctx, err)
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}
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return err
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}
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t := time.Unix(int64(binary.LittleEndian.Uint64(tmp[:])), 0)
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if !t.After(newerThan) {
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return nil
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}
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// Current
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if _, err := io.ReadFull(src, tmp[:8]); err != nil {
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if d.debug {
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logger.LogIf(ctx, err)
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}
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return err
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}
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dst.Current.idx = binary.LittleEndian.Uint64(tmp[:])
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dst.Current.bf = emptyBloomFilter()
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if _, err := dst.Current.bf.ReadFrom(src); err != nil {
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if d.debug {
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logger.LogIf(ctx, err)
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}
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return err
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}
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// History
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if _, err := io.ReadFull(src, tmp[:8]); err != nil {
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if d.debug {
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logger.LogIf(ctx, err)
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}
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return err
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}
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n := binary.LittleEndian.Uint64(tmp[:])
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dst.History = make(dataUpdateTrackerHistory, int(n))
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for i, e := range dst.History {
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if _, err := io.ReadFull(src, tmp[:8]); err != nil {
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if d.debug {
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logger.LogIf(ctx, err)
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}
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return err
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}
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e.idx = binary.LittleEndian.Uint64(tmp[:])
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e.bf = emptyBloomFilter()
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if _, err := e.bf.ReadFrom(src); err != nil {
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if d.debug {
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logger.LogIf(ctx, err)
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}
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return err
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}
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dst.History[i] = e
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}
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// Ignore what remains on the stream.
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// Update d:
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d.mu.Lock()
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defer d.mu.Unlock()
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d.Current = dst.Current
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d.History = dst.History
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d.Saved = dst.Saved
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return nil
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}
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// start a collector that picks up entries from objectUpdatedCh
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// and adds them to the current bloom filter.
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func (d *dataUpdateTracker) startCollector(ctx context.Context) {
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for {
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select {
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case <-ctx.Done():
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return
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case in := <-d.input:
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bucket, _ := path2BucketObjectWithBasePath("", in)
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if bucket == "" {
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if d.debug && len(in) > 0 {
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logger.Info(color.Green("data-usage:")+" no bucket (%s)", in)
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}
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continue
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}
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if isReservedOrInvalidBucket(bucket, false) {
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if false && d.debug {
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logger.Info(color.Green("data-usage:")+" isReservedOrInvalidBucket: %v, entry: %v", bucket, in)
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}
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continue
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}
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split := splitPathDeterministic(in)
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// Add all paths until level 3.
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d.mu.Lock()
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for i := range split {
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if d.debug && false {
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logger.Info(color.Green("dataUpdateTracker:") + " Marking path dirty: " + color.Blue(path.Join(split[:i+1]...)))
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}
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d.Current.bf.AddString(hashPath(path.Join(split[:i+1]...)).String())
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}
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d.dirty = d.dirty || len(split) > 0
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d.mu.Unlock()
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}
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}
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}
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// find entry with specified index.
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// Returns nil if not found.
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func (d dataUpdateTrackerHistory) find(idx uint64) *dataUpdateFilter {
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for _, f := range d {
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if f.idx == idx {
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return &f
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}
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}
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return nil
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}
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// filterFrom will return a combined bloom filter.
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func (d *dataUpdateTracker) filterFrom(ctx context.Context, oldest, newest uint64) *bloomFilterResponse {
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bf := d.newBloomFilter()
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bfr := bloomFilterResponse{
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OldestIdx: oldest,
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CurrentIdx: d.Current.idx,
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Complete: true,
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}
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// Loop through each index requested.
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for idx := oldest; idx <= newest; idx++ {
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v := d.History.find(idx)
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if v == nil {
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if d.Current.idx == idx {
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// Merge current.
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err := bf.Merge(d.Current.bf.BloomFilter)
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logger.LogIf(ctx, err)
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if err != nil {
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bfr.Complete = false
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}
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continue
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}
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bfr.Complete = false
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bfr.OldestIdx = idx + 1
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continue
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}
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err := bf.Merge(v.bf.BloomFilter)
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if err != nil {
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bfr.Complete = false
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logger.LogIf(ctx, err)
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continue
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}
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bfr.NewestIdx = idx
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}
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var dst bytes.Buffer
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_, err := bf.WriteTo(&dst)
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if err != nil {
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logger.LogIf(ctx, err)
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return nil
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}
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bfr.Filter = dst.Bytes()
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return &bfr
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}
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// cycleFilter will cycle the bloom filter to start recording to index y if not already.
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// The response will contain a bloom filter starting at index x up to, but not including index y.
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// If y is 0, the response will not update y, but return the currently recorded information
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// from the up until and including current y.
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func (d *dataUpdateTracker) cycleFilter(ctx context.Context, oldest, current uint64) (*bloomFilterResponse, error) {
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d.mu.Lock()
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defer d.mu.Unlock()
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if current == 0 {
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if len(d.History) == 0 {
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return d.filterFrom(ctx, d.Current.idx, d.Current.idx), nil
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}
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d.History.sort()
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return d.filterFrom(ctx, d.History[len(d.History)-1].idx, d.Current.idx), nil
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}
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// Move current to history if new one requested
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if d.Current.idx != current {
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d.dirty = true
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if d.debug {
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logger.Info(color.Green("dataUpdateTracker:")+" cycle bloom filter: %v -> %v", d.Current.idx, current)
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}
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|
|
d.History = append(d.History, d.Current)
|
|
d.Current.idx = current
|
|
d.Current.bf = d.newBloomFilter()
|
|
select {
|
|
case d.save <- struct{}{}:
|
|
default:
|
|
}
|
|
}
|
|
d.History.removeOlderThan(oldest)
|
|
return d.filterFrom(ctx, oldest, current), nil
|
|
}
|
|
|
|
// splitPathDeterministic will split the provided relative path
|
|
// deterministically and return up to the first 3 elements of the path.
|
|
// Slash and dot prefixes are removed.
|
|
// Trailing slashes are removed.
|
|
// Returns 0 length if no parts are found after trimming.
|
|
func splitPathDeterministic(in string) []string {
|
|
split := strings.Split(in, SlashSeparator)
|
|
|
|
// Trim empty start/end
|
|
for len(split) > 0 {
|
|
if len(split[0]) > 0 && split[0] != "." {
|
|
break
|
|
}
|
|
split = split[1:]
|
|
}
|
|
for len(split) > 0 {
|
|
if len(split[len(split)-1]) > 0 {
|
|
break
|
|
}
|
|
split = split[:len(split)-1]
|
|
}
|
|
|
|
// Return up to 3 parts.
|
|
if len(split) > 3 {
|
|
split = split[:3]
|
|
}
|
|
return split
|
|
}
|
|
|
|
// bloomFilterRequest request bloom filters.
|
|
// Current index will be updated to current and entries back to Oldest is returned.
|
|
type bloomFilterRequest struct {
|
|
Oldest uint64
|
|
Current uint64
|
|
}
|
|
|
|
type bloomFilterResponse struct {
|
|
// Current index being written to.
|
|
CurrentIdx uint64
|
|
// Oldest index in the returned bloom filter.
|
|
OldestIdx uint64
|
|
// Newest Index in the returned bloom filter.
|
|
NewestIdx uint64
|
|
// Are all indexes between oldest and newest filled?
|
|
Complete bool
|
|
// Binary data of the bloom filter.
|
|
Filter []byte
|
|
}
|
|
|
|
// ObjectPathUpdated indicates a path has been updated.
|
|
// The function will never block.
|
|
func ObjectPathUpdated(s string) {
|
|
select {
|
|
case objectUpdatedCh <- s:
|
|
default:
|
|
}
|
|
}
|