// 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
}
// NewData returns a pointer to labelsz data.
func NewData(uuid dvid.UUID, id dvid.InstanceID, name dvid.InstanceName, c dvid.Config) (*Data, error) {
// See if we have a valid DataService ROI
var roistr string
roistr, found, err := c.GetString("ROI")
if err != nil {
return nil, err
}
if found {
parts := strings.Split(roistr, ",")
if len(parts) != 2 {
return nil, fmt.Errorf("bad ROI value (%q) expected %q", roistr, "<roiname>,<uuid>")
}
}
// Initialize the Data for this data type
basedata, err := datastore.NewDataService(dtype, uuid, id, name, c)
if err != nil {
return nil, err
}
data := &Data{
Data: basedata,
Properties: Properties{
StaticROI: roistr,
},
}
return data, nil
}
// NewData returns a pointer to labelblk data.
func NewData(uuid dvid.UUID, id dvid.InstanceID, name dvid.InstanceName, c dvid.Config) (*Data, error) {
imgblkData, err := dtype.Type.NewData(uuid, id, name, c)
if err != nil {
return nil, err
}
// Check if Raveler label.
// TODO - Remove Raveler code outside of DVID.
var labelType LabelType = Standard64bit
s, found, err := c.GetString("LabelType")
if found {
switch strings.ToLower(s) {
case "raveler":
labelType = RavelerLabel
case "standard":
default:
return nil, fmt.Errorf("unknown label type specified '%s'", s)
}
}
dvid.Infof("Creating labelblk '%s' with %s", name, labelType)
data := &Data{
Data: imgblkData,
Labeling: labelType,
}
return data, nil
}
// NewData returns a pointer to new ROI data with default values.
func (dtype *Type) NewDataService(uuid dvid.UUID, id dvid.InstanceID, name dvid.InstanceName, c dvid.Config) (datastore.DataService, error) {
basedata, err := datastore.NewDataService(dtype, uuid, id, name, c)
if err != nil {
return nil, err
}
s, found, err := c.GetString("BlockSize")
if err != nil {
return nil, err
}
var blockSize dvid.Point3d
if found {
pt, err := dvid.StringToPoint(s, ",")
if err != nil {
return nil, err
}
if pt.NumDims() != 3 {
return nil, fmt.Errorf("BlockSize must be 3d, not %dd", pt.NumDims())
}
blockSize, _ = pt.(dvid.Point3d)
} else {
blockSize = dvid.Point3d{DefaultBlockSize, DefaultBlockSize, DefaultBlockSize}
}
d := &Data{
Data: basedata,
Properties: Properties{blockSize, math.MaxInt32, math.MinInt32},
ready: make(map[dvid.VersionID]bool),
}
return d, nil
}
// Make a copy of a repository, customizing it via config.
// TODO -- modify data instance properties based on filters.
func (r *repoT) customize(v dvid.VersionID, config dvid.Config) (*repoT, rpc.Transmit, error) {
// Since we can have names separated by commas, split them
namesStr, found, err := config.GetString("data")
if err != nil {
return nil, rpc.TransmitUnknown, err
}
var datanames dvid.InstanceNames
if found {
for _, name := range strings.Split(namesStr, ",") {
datanames = append(datanames, dvid.InstanceName(strings.TrimSpace(name)))
}
}
// Check the transmission behavior: all, flatten, or deltas.
var versions map[dvid.VersionID]struct{}
transmitStr, found, err := config.GetString("transmit")
if err != nil {
return nil, rpc.TransmitUnknown, err
}
if !found {
transmitStr = "all"
}
var transmit rpc.Transmit
switch transmitStr {
case "flatten":
transmit = rpc.TransmitFlatten
versions = map[dvid.VersionID]struct{}{
v: struct{}{},
}
case "all":
transmit = rpc.TransmitAll
versions = r.versionSet()
case "branch":
transmit = rpc.TransmitBranch
versions = r.versionSet()
default:
return nil, rpc.TransmitUnknown, fmt.Errorf("unknown transmit %s", transmitStr)
}
// Make a copy filtering by allowed data instances.
r.RLock()
defer r.RUnlock()
dup, err := r.duplicate(versions, datanames)
return dup, transmit, err
}
func (p *Properties) setByConfig(config dvid.Config) error {
s, found, err := config.GetString("BlockSize")
if err != nil {
return err
}
if found {
p.BlockSize, err = dvid.StringToPoint3d(s, ",")
if err != nil {
return err
}
}
s, found, err = config.GetString("VoxelSize")
if err != nil {
return err
}
if found {
dvid.Infof("Changing resolution of voxels to %s\n", s)
p.Resolution.VoxelSize, err = dvid.StringToNdFloat32(s, ",")
if err != nil {
return err
}
}
s, found, err = config.GetString("VoxelUnits")
if err != nil {
return err
}
if found {
p.Resolution.VoxelUnits, err = dvid.StringToNdString(s, ",")
if err != nil {
return err
}
}
return nil
}
// NewData returns a pointer to labelvol data.
func NewData(uuid dvid.UUID, id dvid.InstanceID, name dvid.InstanceName, c dvid.Config) (*Data, error) {
// Make sure we have a valid labelvol source
s, found, err := c.GetString("Source")
if err != nil {
return nil, err
}
if !found {
return nil, fmt.Errorf("Cannot make labelsz data without valid 'Source' specifying an associated labelvol.")
}
srcname := dvid.InstanceName(s)
if _, err = labelvol.GetByUUID(uuid, srcname); err != nil {
return nil, err
}
c.Set("sync", s) // This will set base data sync list
// Initialize the Data for this data type
basedata, err := datastore.NewDataService(dtype, uuid, id, name, c)
if err != nil {
return nil, err
}
return &Data{basedata, srcname}, nil
}
// CopyInstance copies a data instance locally, perhaps to a different storage
// engine if the new instance uses a different backend per a data instance-specific configuration.
// (See sample config.example.toml file in root dvid source directory.)
func CopyInstance(uuid dvid.UUID, source, target dvid.InstanceName, c dvid.Config) error {
if manager == nil {
return ErrManagerNotInitialized
}
if source == "" || target == "" {
return fmt.Errorf("both source and cloned name must be provided")
}
// Get any filter spec
fstxt, found, err := c.GetString("filter")
if err != nil {
return err
}
var fs storage.FilterSpec
if found {
fs = storage.FilterSpec(fstxt)
}
// Get flatten or not
transmit, found, err := c.GetString("transmit")
if err != nil {
return err
}
var flatten bool
if transmit == "flatten" {
flatten = true
}
// Get the source data instance.
d1, err := manager.getDataByUUIDName(uuid, source)
if err != nil {
return err
}
// Create the target instance.
t, err := TypeServiceByName(d1.TypeName())
if err != nil {
return err
}
d2, err := manager.newData(uuid, t, target, c)
if err != nil {
return err
}
// Populate the new data instance properties from source.
copier, ok := d2.(PropertyCopier)
if ok {
if err := copier.CopyPropertiesFrom(d1, fs); err != nil {
return err
}
if err := SaveDataByUUID(uuid, d2); err != nil {
return err
}
}
// We should be able to get the backing store (only ordered kv for now)
storer, ok := d1.(storage.Accessor)
if !ok {
return fmt.Errorf("unable to push data %q: unable to access backing store", d1.DataName())
}
oldKV, err := storer.GetOrderedKeyValueDB()
if err != nil {
return fmt.Errorf("unable to get backing store for data %q: %v\n", d1.DataName(), err)
}
storer, ok = d2.(storage.Accessor)
if !ok {
return fmt.Errorf("unable to push data %q: unable to access backing store", d2.DataName())
}
newKV, err := storer.GetOrderedKeyValueDB()
if err != nil {
return fmt.Errorf("unable to get backing store for data %q: %v\n", d2.DataName(), err)
}
dvid.Infof("Copying data %q (%s) to data %q (%s)...\n", d1.DataName(), oldKV, d2.DataName(), newKV)
// See if this data instance implements a Send filter.
var filter storage.Filter
filterer, ok := d1.(storage.Filterer)
if ok && fs != "" {
var err error
filter, err = filterer.NewFilter(fs)
if err != nil {
return err
}
}
// copy data with optional datatype-specific filtering.
return copyData(oldKV, newKV, d1, d2, uuid, filter, flatten)
}
// NewData returns a pointer to new googlevoxels data with default values.
func (dtype *Type) NewDataService(uuid dvid.UUID, id dvid.InstanceID, name dvid.InstanceName, c dvid.Config) (datastore.DataService, error) {
// Make sure we have needed volumeid and authentication key.
volumeid, found, err := c.GetString("volumeid")
if err != nil {
return nil, err
}
if !found {
return nil, fmt.Errorf("Cannot make googlevoxels data without valid 'volumeid' setting.")
}
jwtfile, found, err := c.GetString("jwtfile")
if err != nil {
return nil, err
}
if !found {
return nil, fmt.Errorf("Cannot make googlevoxels data without valid 'jwtfile' specifying path to JSON Web Token")
}
// Read in the JSON Web Token
jwtdata, err := ioutil.ReadFile(jwtfile)
if err != nil {
return nil, fmt.Errorf("Cannot load JSON Web Token file (%s): %v", jwtfile, err)
}
conf, err := google.JWTConfigFromJSON(jwtdata, "https://www.googleapis.com/auth/brainmaps")
if err != nil {
return nil, fmt.Errorf("Cannot establish JWT Config file from Google: %v", err)
}
client := conf.Client(oauth2.NoContext)
// Make URL call to get the available scaled volumes.
url := fmt.Sprintf("%s/volumes/%s", bmapsPrefix, volumeid)
resp, err := client.Get(url)
if err != nil {
return nil, fmt.Errorf("Error getting volume metadata from Google: %v", err)
}
if resp.StatusCode != http.StatusOK {
return nil, fmt.Errorf("Unexpected status code %d returned when getting volume metadata for %q", resp.StatusCode, volumeid)
}
metadata, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, err
}
resp.Body.Close()
var m struct {
Geoms Geometries `json:"geometry"`
}
if err := json.Unmarshal(metadata, &m); err != nil {
return nil, fmt.Errorf("Error decoding volume JSON metadata: %v", err)
}
dvid.Infof("Successfully got geometries:\nmetadata:\n%s\nparsed JSON:\n%v\n", metadata, m)
// Compute the mapping from tile scale/orientation to scaled volume index.
geomMap := GeometryMap{}
// (1) Find the highest resolution geometry.
var highResIndex GeometryIndex
minVoxelSize := dvid.NdFloat32{10000, 10000, 10000}
for i, geom := range m.Geoms {
if geom.PixelSize[0] < minVoxelSize[0] || geom.PixelSize[1] < minVoxelSize[1] || geom.PixelSize[2] < minVoxelSize[2] {
minVoxelSize = geom.PixelSize
highResIndex = GeometryIndex(i)
}
}
dvid.Infof("Google voxels %q: found highest resolution was geometry %d: %s\n", name, highResIndex, minVoxelSize)
// (2) For all geometries, find out what the scaling is relative to the highest resolution pixel size.
for i, geom := range m.Geoms {
if i == int(highResIndex) {
geomMap[GSpec{0, XY}] = highResIndex
geomMap[GSpec{0, XZ}] = highResIndex
geomMap[GSpec{0, YZ}] = highResIndex
geomMap[GSpec{0, XYZ}] = highResIndex
} else {
scaleX := geom.PixelSize[0] / minVoxelSize[0]
scaleY := geom.PixelSize[1] / minVoxelSize[1]
scaleZ := geom.PixelSize[2] / minVoxelSize[2]
var shape Shape
switch {
case scaleX > scaleZ && scaleY > scaleZ:
shape = XY
case scaleX > scaleY && scaleZ > scaleY:
shape = XZ
case scaleY > scaleX && scaleZ > scaleX:
shape = YZ
default:
shape = XYZ
}
var mag float32
if scaleX > mag {
mag = scaleX
}
if scaleY > mag {
mag = scaleY
}
if scaleZ > mag {
mag = scaleZ
}
scaling := log2(mag)
geomMap[GSpec{scaling, shape}] = GeometryIndex(i)
dvid.Infof("%s at scaling %d set to geometry %d: resolution %s\n", shape, scaling, i, geom.PixelSize)
}
}
// Create a client that will be authorized and authenticated on behalf of the account.
// Initialize the googlevoxels data
basedata, err := datastore.NewDataService(dtype, uuid, id, name, c)
if err != nil {
return nil, err
}
data := &Data{
Data: basedata,
Properties: Properties{
VolumeID: volumeid,
JWT: string(jwtdata),
TileSize: DefaultTileSize,
GeomMap: geomMap,
Scales: m.Geoms,
HighResIndex: highResIndex,
},
client: client,
}
return data, nil
}
// NewData returns a pointer to new tile data with default values.
func (dtype *Type) NewDataService(uuid dvid.UUID, id dvid.InstanceID, name dvid.InstanceName, c dvid.Config) (datastore.DataService, error) {
// Make sure we have a valid DataService source
sourcename, found, err := c.GetString("Source")
if err != nil {
return nil, err
}
if !found {
return nil, fmt.Errorf("Cannot make imagetile data without valid 'Source' setting.")
}
// See if we want placeholder imagetile.
placeholder, found, err := c.GetBool("Placeholder")
if err != nil {
return nil, err
}
// Determine encoding for tile storage and this dictates what kind of compression we use.
encoding, found, err := c.GetString("Format")
if err != nil {
return nil, err
}
format := PNG
if found {
switch strings.ToLower(encoding) {
case "lz4":
format = LZ4
case "png":
format = PNG
case "jpg":
format = JPG
default:
return nil, fmt.Errorf("Unknown encoding specified: '%s' (should be 'lz4', 'png', or 'jpg'", encoding)
}
}
// Compression is determined by encoding. Inform user if there's a discrepancy.
var compression string
switch format {
case LZ4:
compression = "lz4"
case PNG:
compression = "none"
case JPG:
compression = "none"
}
compressConfig, found, err := c.GetString("Compression")
if err != nil {
return nil, err
}
if found && strings.ToLower(compressConfig) != compression {
return nil, fmt.Errorf("Conflict between specified compression '%s' and format '%s'. Suggest not dictating compression.",
compressConfig, encoding)
}
c.Set("Compression", compression)
// Initialize the imagetile data
basedata, err := datastore.NewDataService(dtype, uuid, id, name, c)
if err != nil {
return nil, err
}
data := &Data{
Data: basedata,
Properties: Properties{
Source: dvid.InstanceName(sourcename),
Placeholder: placeholder,
Encoding: format,
},
}
return data, nil
}
func (d *Data) ModifyConfig(config dvid.Config) error {
// Set compression for this instance
s, found, err := config.GetString("Compression")
if err != nil {
return err
}
if found {
format := strings.ToLower(s)
switch format {
case "none":
d.compression, _ = dvid.NewCompression(dvid.Uncompressed, dvid.DefaultCompression)
case "snappy":
d.compression, _ = dvid.NewCompression(dvid.Snappy, dvid.DefaultCompression)
case "lz4":
d.compression, _ = dvid.NewCompression(dvid.LZ4, dvid.DefaultCompression)
case "gzip":
d.compression, _ = dvid.NewCompression(dvid.Gzip, dvid.DefaultCompression)
default:
// Check for gzip + compression level
parts := strings.Split(format, ":")
if len(parts) == 2 && parts[0] == "gzip" {
level, err := strconv.Atoi(parts[1])
if err != nil {
return fmt.Errorf("Unable to parse gzip compression level ('%d'). Should be 'gzip:<level>'.", parts[1])
}
d.compression, _ = dvid.NewCompression(dvid.Gzip, dvid.CompressionLevel(level))
} else {
return fmt.Errorf("Illegal compression specified: %s", s)
}
}
}
// Set checksum for this instance
s, found, err = config.GetString("Checksum")
if err != nil {
return err
}
if found {
checksum := strings.ToLower(s)
switch checksum {
case "none":
d.checksum = dvid.NoChecksum
case "crc32":
d.checksum = dvid.CRC32
default:
return fmt.Errorf("Illegal checksum specified: %s", s)
}
}
// Set data instances for syncing.
s, found, err = config.GetString("sync")
if err != nil {
return err
}
if found {
names := strings.Split(s, ",")
if len(names) > 0 {
for _, name := range names {
d.syncs = append(d.syncs, dvid.InstanceName(name))
}
}
}
// Set versioning
s, found, err = config.GetString("Versioned")
if err != nil {
return err
}
if found {
versioned := strings.ToLower(s)
switch versioned {
case "false", "0":
d.unversioned = true
case "true", "1":
d.unversioned = false
default:
return fmt.Errorf("Illegal setting for 'versioned' (needs to be 'false', '0', 'true', or '1'): %s", s)
}
}
return nil
}
// NewData returns a pointer to new googlevoxels data with default values.
func (dtype *Type) NewDataService(uuid dvid.UUID, id dvid.InstanceID, name dvid.InstanceName, c dvid.Config) (datastore.DataService, error) {
// Make sure we have needed volumeid and authentication key.
volumeid, found, err := c.GetString("volumeid")
if err != nil {
return nil, err
}
if !found {
return nil, fmt.Errorf("Cannot make googlevoxels data without valid 'volumeid' setting.")
}
authkey, found, err := c.GetString("authkey")
if err != nil {
return nil, err
}
if !found {
return nil, fmt.Errorf("Cannot make googlevoxels data without valid 'authkey' setting.")
}
// Make URL call to get the available scaled volumes.
url := fmt.Sprintf("https://www.googleapis.com/brainmaps/v1beta1/volumes/%s?key=%s", volumeid, authkey)
resp, err := http.Get(url)
if err != nil {
return nil, fmt.Errorf("Error getting volume metadata from Google: %v", err)
}
if resp.StatusCode != http.StatusOK {
return nil, fmt.Errorf("Unexpected status code %d returned when getting volume metadata for %q", resp.StatusCode, volumeid)
}
metadata, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nil, err
}
var m struct {
Geoms Geometries `json:"geometrys"`
}
if err := json.Unmarshal(metadata, &m); err != nil {
return nil, fmt.Errorf("Error decoding volume JSON metadata: %v", err)
}
// Compute the mapping from tile scale/orientation to scaled volume index.
tileMap := GeometryMap{}
// (1) Find the highest resolution geometry.
var highResIndex GeometryIndex
minVoxelSize := dvid.NdFloat32{10000, 10000, 10000}
for i, geom := range m.Geoms {
if geom.PixelSize[0] < minVoxelSize[0] || geom.PixelSize[1] < minVoxelSize[1] || geom.PixelSize[2] < minVoxelSize[2] {
minVoxelSize = geom.PixelSize
highResIndex = GeometryIndex(i)
}
}
dvid.Infof("Google voxels %q: found highest resolution was geometry %d: %s\n", name, highResIndex, minVoxelSize)
// (2) For all geometries, find out what the scaling is relative to the highest resolution pixel size.
for i, geom := range m.Geoms {
if i == int(highResIndex) {
tileMap[TileSpec{0, XY}] = highResIndex
tileMap[TileSpec{0, XZ}] = highResIndex
tileMap[TileSpec{0, YZ}] = highResIndex
} else {
scaleX := geom.PixelSize[0] / minVoxelSize[0]
scaleY := geom.PixelSize[1] / minVoxelSize[1]
scaleZ := geom.PixelSize[2] / minVoxelSize[2]
var plane TileOrientation
switch {
case scaleX > scaleZ && scaleY > scaleZ:
plane = XY
case scaleX > scaleY && scaleZ > scaleY:
plane = XZ
case scaleY > scaleX && scaleZ > scaleX:
plane = YZ
default:
dvid.Infof("Odd geometry skipped for Google voxels %q with pixel size: %s\n", name, geom.PixelSize)
dvid.Infof(" Scaling from highest resolution: %d x %d x %d\n", scaleX, scaleY, scaleZ)
continue
}
var mag float32
if scaleX > mag {
mag = scaleX
}
if scaleY > mag {
mag = scaleY
}
if scaleZ > mag {
mag = scaleZ
}
scaling := log2(mag)
tileMap[TileSpec{scaling, plane}] = GeometryIndex(i)
dvid.Infof("Plane %s at scaling %d set to geometry %d: resolution %s\n", plane, scaling, i, geom.PixelSize)
}
}
// Initialize the googlevoxels data
basedata, err := datastore.NewDataService(dtype, uuid, id, name, c)
if err != nil {
return nil, err
}
data := &Data{
Data: basedata,
Properties: Properties{
VolumeID: volumeid,
AuthKey: authkey,
TileSize: DefaultTileSize,
TileMap: tileMap,
Scales: m.Geoms,
HighResIndex: highResIndex,
},
}
return data, nil
}
// PushRepo pushes a Repo to a remote DVID server at the target address.
func PushRepo(uuid dvid.UUID, target string, config dvid.Config) error {
if manager == nil {
return ErrManagerNotInitialized
}
if target == "" {
target = rpc.DefaultAddress
dvid.Infof("No target specified for push, defaulting to %q\n", rpc.DefaultAddress)
}
// Get the full local repo
thisRepo, err := manager.repoFromUUID(uuid)
if err != nil {
return err
}
// Get any filter
filter, found, err := config.GetString("filter")
if err != nil {
return err
}
// Create a repo that is tailored by the push configuration, e.g.,
// keeping just given data instances, etc.
v, found := manager.uuidToVersion[uuid]
if !found {
return ErrInvalidUUID
}
txRepo, transmit, err := thisRepo.customize(v, config)
if err != nil {
return err
}
// Establish session with target, which may be itself
s, err := rpc.NewSession(target, pushMessageID)
if err != nil {
return fmt.Errorf("Unable to connect (%s) for push: %s", target, err.Error())
}
defer s.Close() // TODO -- check if can hang if error occurs during job
// Send the repo metadata, transmit type, and other useful data for remote server.
dvid.Infof("Sending repo %s data to %q\n", uuid, target)
repoSerialization, err := txRepo.GobEncode()
if err != nil {
return err
}
repoMsg := repoTxMsg{
Session: s.ID(),
Transmit: transmit,
UUID: uuid,
Repo: repoSerialization,
}
resp, err := s.Call()(sendRepoMsg, repoMsg)
if err != nil {
return err
}
if resp == nil {
return fmt.Errorf("push unnecessary -- versions at remote are already present")
}
// We should get back a version set to send, or nil = send all versions.
versions, ok := resp.(map[dvid.VersionID]struct{})
if !ok {
return fmt.Errorf("received response during repo push that wasn't expected set of delta versions")
}
dvid.Debugf("Remote sent list of %d versions to send\n", len(versions))
// For each data instance, send the data with optional datatype-specific filtering.
ps := &PushSession{storage.FilterSpec(filter), versions, s, transmit}
for _, d := range txRepo.data {
dvid.Infof("Sending instance %q data to %q\n", d.DataName(), target)
if err := d.PushData(ps); err != nil {
dvid.Errorf("Aborting send of instance %q data\n", d.DataName())
return err
}
}
return nil
}