Esempio n. 1
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// NewLabel returns a new label for the given version.
func (d *Data) NewLabel(v dvid.VersionID) (uint64, error) {
	d.ml_mu.Lock()
	defer d.ml_mu.Unlock()

	// Make sure we aren't trying to increment a label on a locked node.
	locked, err := datastore.LockedVersion(v)
	if err != nil {
		return 0, err
	}
	if locked {
		return 0, fmt.Errorf("can't ask for new label in a locked version id %d", v)
	}

	// Increment and store.
	d.MaxRepoLabel++
	d.MaxLabel[v] = d.MaxRepoLabel

	store, err := storage.SmallDataStore()
	if err != nil {
		return 0, fmt.Errorf("can't initializing small data store: %v\n", err)
	}
	buf := make([]byte, 8)
	binary.LittleEndian.PutUint64(buf, d.MaxRepoLabel)
	ctx := datastore.NewVersionedCtx(d, v)
	store.Put(ctx, maxLabelTKey, buf)

	ctx2 := storage.NewDataContext(d, 0)
	store.Put(ctx2, maxRepoLabelTKey, buf)

	return d.MaxRepoLabel, nil
}
Esempio n. 2
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// MigrateInstance migrates a data instance locally from an old storage
// engine to the current configured storage.  After completion of the copy,
// the data instance in the old storage is deleted.
func MigrateInstance(uuid dvid.UUID, source dvid.InstanceName, oldStore dvid.Store, c dvid.Config) error {
	if manager == nil {
		return ErrManagerNotInitialized
	}

	// Get flatten or not
	transmit, _, err := c.GetString("transmit")
	if err != nil {
		return err
	}
	var flatten bool
	if transmit == "flatten" {
		flatten = true
	}

	// Get the source data instance.
	d, err := manager.getDataByUUIDName(uuid, source)
	if err != nil {
		return err
	}

	// Get the current store for this data instance.
	storer, ok := d.(storage.Accessor)
	if !ok {
		return fmt.Errorf("unable to migrate data %q: unable to access backing store", d.DataName())
	}
	curKV, err := storer.GetOrderedKeyValueDB()
	if err != nil {
		return fmt.Errorf("unable to get backing store for data %q: %v\n", source, err)
	}

	// Get the old store.
	oldKV, ok := oldStore.(storage.OrderedKeyValueDB)
	if !ok {
		return fmt.Errorf("unable to migrate data %q from store %s which isn't ordered kv store", source, storer)
	}

	// Abort if the two stores are the same.
	if curKV == oldKV {
		return fmt.Errorf("old store for data %q seems same as current store", source)
	}

	// Migrate data asynchronously.
	go func() {
		if err := copyData(oldKV, curKV, d, nil, uuid, nil, flatten); err != nil {
			dvid.Errorf("error in migration of data %q: %v\n", source, err)
			return
		}
		// delete data off old store.
		dvid.Infof("Starting delete of instance %q from old storage %q\n", d.DataName(), oldKV)
		ctx := storage.NewDataContext(d, 0)
		if err := oldKV.DeleteAll(ctx, true); err != nil {
			dvid.Errorf("deleting instance %q from %q after copy to %q: %v\n", d.DataName(), oldKV, curKV, err)
			return
		}
	}()

	dvid.Infof("Migrating data %q from store %q to store %q ...\n", d.DataName(), oldKV, curKV)
	return nil
}
Esempio n. 3
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// LoadMutable loads mutable properties of label volumes like the maximum labels
// for each version.  Note that we load these max labels from key-value pairs
// rather than data instance properties persistence, because in the case of a crash,
// the actually stored repo data structure may be out-of-date compared to the guaranteed
// up-to-date key-value pairs for max labels.
func (d *Data) LoadMutable(root dvid.VersionID, storedVersion, expectedVersion uint64) (bool, error) {
	ctx := storage.NewDataContext(d, 0)
	store, err := storage.SmallDataStore()
	if err != nil {
		return false, fmt.Errorf("Data type labelvol had error initializing store: %v\n", err)
	}

	wg := new(sync.WaitGroup)
	wg.Add(1)
	ch := make(chan *storage.KeyValue)

	// Start appropriate migration function if any.
	var saveRequired bool

	switch storedVersion {
	case 0:
		// Need to update all max labels and set repo-level max label.
		saveRequired = true
		go d.migrateMaxLabels(root, wg, ch)
	default:
		// Load in each version max label without migration.
		go d.loadMaxLabels(wg, ch)

		// Load in the repo-wide max label.
		data, err := store.Get(ctx, maxRepoLabelTKey)
		if err != nil {
			return false, err
		}
		d.MaxRepoLabel = binary.LittleEndian.Uint64(data)
	}

	// Send the max label data per version
	minKey, err := ctx.MinVersionKey(maxLabelTKey)
	if err != nil {
		return false, err
	}
	maxKey, err := ctx.MaxVersionKey(maxLabelTKey)
	if err != nil {
		return false, err
	}
	keysOnly := false
	if err = store.SendRange(minKey, maxKey, keysOnly, ch); err != nil {
		return false, err
	}
	wg.Wait()

	dvid.Infof("Loaded max label values for labelvol %q with repo-wide max %d\n", d.DataName(), d.MaxRepoLabel)
	return saveRequired, nil
}
Esempio n. 4
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func (d *Data) loadMaxLabels(wg *sync.WaitGroup, ch chan *storage.KeyValue) {
	ctx := storage.NewDataContext(d, 0)
	var repoMax uint64
	d.MaxLabel = make(map[dvid.VersionID]uint64)
	for {
		kv := <-ch
		if kv == nil {
			break
		}
		v, err := ctx.VersionFromKey(kv.K)
		if err != nil {
			dvid.Errorf("Can't decode key when loading mutable data for %s", d.DataName())
			continue
		}
		if len(kv.V) != 8 {
			dvid.Errorf("Got bad value.  Expected 64-bit label, got %v", kv.V)
			continue
		}
		label := binary.LittleEndian.Uint64(kv.V)
		d.MaxLabel[v] = label
		if label > repoMax {
			repoMax = label
		}
	}

	// Load in the repo-wide max label.
	store, err := storage.MutableStore()
	if err != nil {
		dvid.Errorf("Data type labelvol had error initializing store: %v\n", err)
		return
	}
	data, err := store.Get(ctx, maxRepoLabelTKey)
	if err != nil {
		dvid.Errorf("Error getting repo-wide max label: %v\n", err)
		return
	}
	if data == nil || len(data) != 8 {
		dvid.Errorf("Could not load repo-wide max label for instance %q.  Only got %d bytes, not 64-bit label.\n", d.DataName(), len(data))
		dvid.Errorf("Using max label across versions: %d\n", repoMax)
		d.MaxRepoLabel = repoMax
	} else {
		d.MaxRepoLabel = binary.LittleEndian.Uint64(data)
		if d.MaxRepoLabel < repoMax {
			dvid.Errorf("Saved repo-wide max for instance %q was %d, changed to largest version max %d\n", d.DataName(), d.MaxRepoLabel, repoMax)
			d.MaxRepoLabel = repoMax
		}
	}
	wg.Done()
}
Esempio n. 5
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func (d *Data) migrateMaxLabels(root dvid.VersionID, wg *sync.WaitGroup, ch chan *storage.KeyValue) {
	ctx := storage.NewDataContext(d, 0)
	store, err := storage.SmallDataStore()
	if err != nil {
		dvid.Errorf("Can't initializing small data store: %v\n", err)
	}

	var maxRepoLabel uint64
	d.MaxLabel = make(map[dvid.VersionID]uint64)
	for {
		kv := <-ch
		if kv == nil {
			break
		}
		v, err := ctx.VersionFromKey(kv.K)
		if err != nil {
			dvid.Errorf("Can't decode key when loading mutable data for %s", d.DataName())
			continue
		}
		if len(kv.V) != 8 {
			dvid.Errorf("Got bad value.  Expected 64-bit label, got %v", kv.V)
			continue
		}
		label := binary.LittleEndian.Uint64(kv.V)
		d.MaxLabel[v] = label
		if label > maxRepoLabel {
			maxRepoLabel = label
		}
	}

	// Adjust the MaxLabel data to make sure we correct for any case of child max < parent max.
	d.adjustMaxLabels(store, root)

	// Set the repo-wide max label.
	d.MaxRepoLabel = maxRepoLabel

	buf := make([]byte, 8)
	binary.LittleEndian.PutUint64(buf, maxRepoLabel)
	store.Put(ctx, maxRepoLabelTKey, buf)

	wg.Done()
	return
}
Esempio n. 6
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// LoadImages bulk loads images using different techniques if it is a multidimensional
// file like HDF5 or a sequence of PNG/JPG/TIF images.
func (d *Data) LoadImages(v dvid.VersionID, offset dvid.Point, filenames []string) error {
	if len(filenames) == 0 {
		return nil
	}
	timedLog := dvid.NewTimeLog()

	// We only want one PUT on given version for given data to prevent interleaved
	// chunk PUTs that could potentially overwrite slice modifications.
	ctx := storage.NewDataContext(d, v)
	loadMutex := ctx.Mutex()
	loadMutex.Lock()

	// Handle cleanup given multiple goroutines still writing data.
	load := &bulkLoadInfo{filenames: filenames, versionID: v, offset: offset}
	defer func() {
		loadMutex.Unlock()

		if load.extentChanged.Value() {
			err := datastore.SaveDataByVersion(v, d)
			if err != nil {
				dvid.Errorf("Error in trying to save repo for voxel extent change: %v\n", err)
			}
		}
	}()

	// Use different loading techniques if we have a potentially multidimensional HDF5 file
	// or many 2d images.
	var err error
	if dvid.Filename(filenames[0]).HasExtensionPrefix("hdf", "h5") {
		err = d.loadHDF(load)
	} else {
		err = d.loadXYImages(load)
	}

	if err != nil {
		timedLog.Infof("RPC load of %d files had error: %v\n", err)
	} else {
		timedLog.Infof("RPC load of %d files completed.\n", len(filenames))
	}
	return err
}
Esempio n. 7
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func (d *Data) loadMaxLabels(wg *sync.WaitGroup, ch chan *storage.KeyValue) {
	ctx := storage.NewDataContext(d, 0)
	d.MaxLabel = make(map[dvid.VersionID]uint64)
	for {
		kv := <-ch
		if kv == nil {
			wg.Done()
			return
		}
		v, err := ctx.VersionFromKey(kv.K)
		if err != nil {
			dvid.Errorf("Can't decode key when loading mutable data for %s", d.DataName())
			continue
		}
		if len(kv.V) != 8 {
			dvid.Errorf("Got bad value.  Expected 64-bit label, got %v", kv.V)
			continue
		}
		label := binary.LittleEndian.Uint64(kv.V)
		d.MaxLabel[v] = label
	}
}
Esempio n. 8
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// Given a stored label, make sure our max label tracking is updated.
func (d *Data) casMaxLabel(batch storage.Batch, v dvid.VersionID, label uint64) {
	d.ml_mu.Lock()
	defer d.ml_mu.Unlock()

	save := false
	maxLabel, found := d.MaxLabel[v]
	if !found {
		dvid.Errorf("Bad max label of version %d -- none found!\n", v)
		maxLabel = 0
	}
	if maxLabel < label {
		maxLabel = label
		save = true
	}
	if save {
		buf := make([]byte, 8)
		binary.LittleEndian.PutUint64(buf, maxLabel)
		batch.Put(maxLabelTKey, buf)
		d.MaxLabel[v] = maxLabel

		if d.MaxRepoLabel < maxLabel {
			d.MaxRepoLabel = maxLabel
			ctx := storage.NewDataContext(d, 0)
			store, err := storage.SmallDataStore()
			if err != nil {
				dvid.Errorf("Data type labelvol had error initializing store: %v\n", err)
			} else {
				store.Put(ctx, maxRepoLabelTKey, buf)
			}
		}
	}
	if err := batch.Commit(); err != nil {
		dvid.Errorf("batch put: %v\n", err)
		return
	}
}
Esempio n. 9
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func NewVersionedCtx(data dvid.Data, versionID dvid.VersionID) *VersionedCtx {
	return &VersionedCtx{storage.NewDataContext(data, versionID)}
}