github.com/pachyderm/pachyderm@v1.13.4/src/client/pfs/pfs.proto

syntax = "proto3";

package pfs;
option go_package = "github.com/pachyderm/pachyderm/src/client/pfs";

import "google/protobuf/empty.proto";
import "google/protobuf/timestamp.proto";
import "google/protobuf/wrappers.proto";

import "gogoproto/gogo.proto";

import "client/auth/auth.proto";

////  PFS Data structures (stored in etcd)

message Repo {
  string name = 1;
}

message Branch {
  Repo repo = 1;
  string name = 2;
}

message File {
  Commit commit = 1;
  string path = 2;
}

message Block {
  string hash = 1;
}

message Object {
  string hash = 1;
}

message Tag {
  string name = 1;
}

// RepoInfo is the main data structure representing a Repo in etcd
message RepoInfo {
  reserved 4;
  Repo repo = 1;
  google.protobuf.Timestamp created = 2;
  uint64 size_bytes = 3;
  string description = 5;
  repeated Branch branches = 7;

  // Set by ListRepo and InspectRepo if Pachyderm's auth system is active, but
  // not stored in etcd. To set a user's auth scope for a repo, use the
  // Pachyderm Auth API (in src/client/auth/auth.proto)
  RepoAuthInfo auth_info = 6;
  // tombstone indicates that this repo has been deleted. It's set by DeleteRepo()
  // when called with `--split-txn` (which breaks up a DeleteRepo() call into multiple
  // etcd transactions to avoid a 'transaction too large' error), and it indicates
  // that DeleteRepo has started deleting branches and commits in the repo, but
  // not all of its commits have been deleted and not all upstream commits'
  // subvenance have been updated.
  bool tombstone = 8;
}

// RepoAuthInfo includes the caller's access scope for a repo, and is returned
// by ListRepo and InspectRepo but not persisted in etcd. It's used by the
// Pachyderm dashboard to render repo access appropriately. To set a user's auth
// scope for a repo, use the Pachyderm Auth API (in src/client/auth/auth.proto)
message RepoAuthInfo {
  // The callers access level to the relevant repo (e.g. may be OWNER even if
  // the user isn't an OWNER of the repo, if they're an admin for the cluster)
  auth.Scope access_level = 1;
}

message BranchInfo {
  Branch branch = 4;
  Commit head = 2;
  repeated Branch provenance = 3;
  repeated Branch subvenance = 5;
  repeated Branch direct_provenance = 6;
  Trigger trigger = 7;

  // Deprecated field left for backward compatibility.
  string name = 1;
}

message BranchInfos {
  repeated BranchInfo branch_info = 1;
}

// Trigger defines the conditions under which a head is moved, and to which
// branch it is moved.
message Trigger {
  // Which branch this trigger refers to
  string branch = 1;
  // All indicates that all conditions must be satisfied before the trigger
  // happens, otherwise any conditions being satisfied will trigger it.
  bool all = 2;
  // Triggers if the cron spec has been satisfied since the last trigger and
  // there's been a new commit.
  string cron_spec = 3;
  // Triggers if there's been `size` new data added since the last trigger.
  string size = 4;
  // Triggers if there's been `commits` new commits added since the last trigger.
  int64 commits = 5;
}

// These are the different places where a commit may be originated from
enum OriginKind {
  USER = 0;
  AUTO = 1;
  FSCK = 2;
}

message CommitOrigin {
  OriginKind kind = 1;
}
// Commit is a reference to a commit (e.g. the collection of branches and the
// collection of currently-open commits in etcd are collections of Commit
// protos)
message Commit {
  Repo repo = 1;
  string id = 2 [(gogoproto.customname) = "ID"];
}

// CommitRange represents chain of commits with Lower being an ancestor of
// Upper or, in the case of a range of size 1, the same commit.
message CommitRange {
  Commit lower = 1;
  Commit upper = 2;
}

// CommitProvenance keeps track of where (i.e. which branch) a certain commit
// originated from. A commit's provenance consists of the commits of
// the commits which are in its causal history.
message CommitProvenance {
  Commit commit = 1;
  Branch branch = 2;
}

// CommitInfo is the main data structure representing a commit in etcd
message CommitInfo {
  reserved 6, 10;
  Commit commit = 1;
  Branch branch = 15;
  CommitOrigin origin = 17;
  // description is a user-provided script describing this commit
  string description = 8;
  Commit parent_commit = 2;
  repeated Commit child_commits = 11;
  google.protobuf.Timestamp started = 3;
  google.protobuf.Timestamp finished = 4;
  uint64 size_bytes = 5;

  // the commits and their original branches on which this commit is provenant
  repeated CommitProvenance provenance = 16;

  // ReadyProvenance is the number of provenant commits which have been
  // finished, if ReadyProvenance == len(Provenance) then the commit is ready
  // to be processed by pps.
  int64 ready_provenance = 12;

  repeated CommitRange subvenance = 9;
  // this is the block that stores the serialized form of a tree that
  // represents the entire file system hierarchy of the repo at this commit
  // If this is nil, then the commit is either open (in which case 'finished'
  // will also be nil) or is the output commit of a failed job (in which case
  // 'finished' will have a value -- the end time of the job)
  Object tree = 7;
  repeated Object trees = 13;
  Object datums = 14;

  int64 subvenant_commits_success = 18;
  int64 subvenant_commits_failure = 19;
  int64 subvenant_commits_total = 20;
}

enum FileType {
  RESERVED = 0;
  FILE = 1;
  DIR = 2;
}

message FileInfo {
  File file = 1;
  FileType file_type = 2;
  uint64 size_bytes = 3;
  google.protobuf.Timestamp committed = 10;
  // the base names (i.e. just the filenames, not the full paths) of
  // the children
  repeated string children = 6;
  repeated Object objects = 8;
  repeated BlockRef blockRefs = 9;
  bytes hash = 7;
}

message ByteRange {
  uint64 lower = 1;
  uint64 upper = 2;
}

message BlockRef {
  Block block = 1;
  ByteRange range = 2;
}

message ObjectInfo {
  Object object = 1;
  BlockRef block_ref = 2;
}

message Compaction {
  repeated string input_prefixes = 2;
}

message Shard {
  Compaction compaction = 1;
  PathRange range = 2;
  string output_path = 3;
}

message PathRange {
  string lower = 1;
  string upper = 2;
}

// PFS API

message CreateRepoRequest {
  reserved 2;
  Repo repo = 1;
  string description = 3;
  bool update = 4;
}

message InspectRepoRequest {
  Repo repo = 1;
}

message ListRepoRequest {
  reserved 1;
}

message ListRepoResponse {
  repeated RepoInfo repo_info = 1;
}

message DeleteRepoRequest {
  Repo repo = 1;
  bool force = 2;
  bool all = 3;
  bool split_transaction = 4;
}

// CommitState describes the states a commit can be in.
// The states are increasingly specific, i.e. a commit that is FINISHED also counts as STARTED.
enum CommitState {
  STARTED = 0; // The commit has been started, all commits satisfy this state.
  READY = 1; // The commit has been started, and all of its provenant commits have been finished.
  FINISHED = 2; // The commit has been finished.
}

message StartCommitRequest {
  reserved 2;
  // Parent.ID may be empty in which case the commit that Branch points to will be used as the parent.
  // If branch is empty, or if branch does not exist, the commit will have no parent.
  Commit parent = 1;
  // description is a user-provided string describing this commit
  string description = 4;
  string branch = 3;
  repeated CommitProvenance provenance = 5;
}

message BuildCommitRequest {
  reserved 2;
  Commit parent = 1;
  string branch = 4;
  CommitOrigin origin = 12;
  repeated CommitProvenance provenance = 6;
  Object tree = 3;
  repeated Object trees = 7;
  Object datums = 8;
  // ID sets the ID of the created commit.
  string ID = 5;
  uint64 size_bytes = 9;
  // 'started' and 'finished' are set by Restore() when repopulating old
  // commits. If 'finished' is set, the commit being built is always marked
  // finished.
  google.protobuf.Timestamp started = 10;
  google.protobuf.Timestamp finished = 11;
}

message FinishCommitRequest {
  Commit commit = 1;
  // description is a user-provided string describing this commit. Setting this
  // will overwrite the description set in StartCommit
  string description = 2;

  Object tree = 3;
  repeated Object trees = 5;
  Object datums = 7;
  uint64 size_bytes = 6;
  // If set, 'commit' will be closed (its 'finished' field will be set to the
  // current time) but its 'tree' will be left nil.
  bool empty = 4;
}

message InspectCommitRequest {
  Commit commit = 1;
  // BlockState causes inspect commit to block until the commit is in the desired state.
  CommitState block_state = 2;
}

message ListCommitRequest {
  Repo repo = 1;
  Commit from = 2;
  Commit to = 3;
  uint64 number = 4;
  bool reverse = 5;  // Return commits oldest to newest
}

message CommitInfos {
  repeated CommitInfo commit_info = 1;
}

message CreateBranchRequest {
  Commit head = 1;
  // s_branch matches the field number and type of SetBranchRequest.Branch in
  // Pachyderm 1.6--so that operations (generated by pachyderm 1.6's
  // Admin.Export) can be deserialized by pachyderm 1.7 correctly
  string s_branch = 2;
  Branch branch = 3;
  repeated Branch provenance = 4;
  Trigger trigger = 5;
}

message InspectBranchRequest {
  Branch branch = 1;
}

message ListBranchRequest {
  Repo repo = 1;
  bool reverse = 2; // Returns branches oldest to newest
}

message DeleteBranchRequest {
  Branch branch = 1;
  bool force = 2;
}

message DeleteCommitRequest {
  Commit commit = 1;
}

message FlushCommitRequest {
  repeated Commit commits = 1;
  repeated Repo to_repos = 2;
}

message SubscribeCommitRequest {
  Repo repo = 1;
  string branch = 2;
  CommitProvenance prov = 5;
  // only commits created since this commit are returned
  Commit from = 3;
  // Don't return commits until they're in (at least) the desired state.
  CommitState state = 4;
}

message GetFileRequest {
  File file = 1;
  int64 offset_bytes = 2;
  int64 size_bytes = 3;
}

enum Delimiter {
  NONE = 0;
  JSON = 1;
  LINE = 2;
  SQL = 3;
  CSV = 4;
}

// An OverwriteIndex specifies the index of objects from which new writes
// are applied to.  Existing objects starting from the index are deleted.
// We want a separate message for ObjectIndex because we want to be able to
// distinguish between a zero index and a non-existent index.
message OverwriteIndex {
  int64 index = 1;
}

message PutFileRequest {
  reserved 2, 4;
  File file = 1;
  bytes value = 3;
  string url = 5;
  // applies only to URLs that can be recursively walked, for example s3:// URLs
  bool recursive = 6;
  // Delimiter causes data to be broken up into separate files with File.Path
  // as a prefix.
  Delimiter delimiter = 7;
  // TargetFileDatums specifies the target number of datums in each written
  // file it may be lower if data does not split evenly, but will never be
  // higher, unless the value is 0.
  int64 target_file_datums = 8;
  // TargetFileBytes specifies the target number of bytes in each written
  // file, files may have more or fewer bytes than the target.
  int64 target_file_bytes = 9;
  // header_records is an option for splitting data when 'delimiter' is not NONE
  // (or SQL). It specifies the number of records that are converted to a
  // header and applied to all file shards.
  //
  // This is particularly useful for CSV files, where the first row often
  // contains column titles; if 'header_records' is set to one in that case,
  // the first row will be associated with the directory that contains the rest
  // of the split-up csv rows as files, and if any data is retrieved from that
  // directory by GetFile, it will appear to begin with that first row of
  // column labels (including in pipeline workers).
  //
  // Note that SQL files have their own logic for determining headers (their
  // header is not a number of records, but a collection of SQL commands that
  // create the relevant tables and such). This way, SQL files retrieved by
  // GetFile can be passed to psql, and they will set up the appropriate tables
  // before inserting the records in the files that were retrieved.
  int64 header_records = 11;
  // overwrite_index is the object index where the write starts from.  All
  // existing objects starting from the index are deleted.
  OverwriteIndex overwrite_index = 10;
  // delete indicates that the file should be deleted, this is redundant with
  // DeleteFile, but is necessary because it allows you to send file deletes
  // atomically with other PutFile operations.
  bool delete = 12;
}

// PutFileRecord is used to record PutFile requests in etcd temporarily.
message PutFileRecord {
  int64 size_bytes = 1;
  string object_hash = 2;
  OverwriteIndex overwrite_index = 3;
  BlockRef block_ref = 4;
}

message PutFileRecords {
  bool split = 1;
  repeated PutFileRecord records = 2;
  bool tombstone = 3;
  PutFileRecord header = 4;
  PutFileRecord footer = 5;
}

message CopyFileRequest {
  File src = 1;
  File dst = 2;
  bool overwrite = 3;
}

message InspectFileRequest {
  File file = 1;
}

message ListFileRequest {
  // File is the parent directory of the files we want to list. This sets the
  // repo, the commit/branch, and path prefix of files we're interested in
  // If the "path" field is omitted, a list of files at the top level of the repo
  // is returned
  File file = 1;

  // Full indicates whether the result should include file contents, which may
  // be large (i.e. the list of children for directories, and the list of object
  // references for regular files)
  bool full = 2;

  // History indicates how many historical versions you want returned. Its
  // semantics are:
  // 0: Return the files as they are at the commit in `file`. FileInfo.File
  //    will equal File in this request.
  // 1: Return the files as they are in the last commit they were modified in.
  //    (This will have the same hash as if you'd passed 0, but
  //    FileInfo.File.Commit will be different.
  // 2: Return the above and the files as they are in the next-last commit they
  //    were modified in.
  // 3: etc.
  //-1: Return all historical versions.
  int64 history = 3;
}

message WalkFileRequest {
    File file = 1;
}

message GlobFileRequest {
  Commit commit = 1;
  string pattern = 2;
}

// FileInfos is the result of both ListFile and GlobFile
message FileInfos {
  repeated FileInfo file_info = 1;
}

message DiffFileRequest {
  File new_file = 1;
  // OldFile may be left nil in which case the same path in the parent of
  // NewFile's commit will be used.
  File old_file = 2;
  bool shallow = 3;
}

message DiffFileResponse {
  repeated FileInfo new_files = 1;
  repeated FileInfo old_files = 2;
}

message DeleteFileRequest {
  File file = 1;
}

message FsckRequest {
  bool fix = 1;
}

message FsckResponse {
  string fix = 1;
  string error = 2;
}

// Messages specific to Pachyderm 2.

message FileOperationRequestV2 {
  Commit commit = 1;
  oneof operation {
    PutTarRequestV2 put_tar = 2;
    DeleteFilesRequestV2 delete_files = 3;
  }
}

message PutTarRequestV2 {
  bool overwrite = 1;
  string tag = 2;
  bytes data = 3;
}

message DeleteFilesRequestV2 {
  repeated string files = 1; 
  string tag = 2;
}

message GetTarRequestV2 {
  File file = 1;
}

message DiffFileResponseV2 {
  FileInfo old_file = 1;
  FileInfo new_file = 2;
}

message CreateTmpFileSetResponse {
  string fileset_id = 1;
}

message RenewTmpFileSetRequest {
  string fileset_id = 1;
  int64 ttl_seconds = 2;
}

message ClearCommitRequestV2 {
  Commit commit = 1;
}

service API {
  // Repo rpcs
  // CreateRepo creates a new repo.
  // An error is returned if the repo already exists.
  rpc CreateRepo(CreateRepoRequest) returns (google.protobuf.Empty) {}
  // InspectRepo returns info about a repo.
  rpc InspectRepo(InspectRepoRequest) returns (RepoInfo) {}
  // ListRepo returns info about all repos.
  rpc ListRepo(ListRepoRequest) returns (ListRepoResponse) {}
  // DeleteRepo deletes a repo.
  rpc DeleteRepo(DeleteRepoRequest) returns (google.protobuf.Empty) {}

  // Commit rpcs
  // StartCommit creates a new write commit from a parent commit.
  rpc StartCommit(StartCommitRequest) returns (Commit) {}
  // FinishCommit turns a write commit into a read commit.
  rpc FinishCommit(FinishCommitRequest) returns (google.protobuf.Empty) {}
  // InspectCommit returns the info about a commit.
  rpc InspectCommit(InspectCommitRequest) returns (CommitInfo) {}
  // ListCommit returns info about all commits. This is deprecated in favor of
  // ListCommitStream.
  rpc ListCommit(ListCommitRequest) returns (CommitInfos) {}
  // ListCommitStream is like ListCommit, but returns its results in a GRPC stream
  rpc ListCommitStream(ListCommitRequest) returns (stream CommitInfo) {}
  // DeleteCommit deletes a commit.
  rpc DeleteCommit(DeleteCommitRequest) returns (google.protobuf.Empty) {}
  // FlushCommit waits for downstream commits to finish
  rpc FlushCommit(FlushCommitRequest) returns (stream CommitInfo) {}
  // SubscribeCommit subscribes for new commits on a given branch
  rpc SubscribeCommit(SubscribeCommitRequest) returns (stream CommitInfo) {}
  // BuildCommit builds a commit that's backed by the given tree
  rpc BuildCommit(BuildCommitRequest) returns (Commit) {}

  // CreateBranch creates a new branch
  rpc CreateBranch(CreateBranchRequest) returns (google.protobuf.Empty) {}
  // InspectBranch returns info about a branch.
  rpc InspectBranch(InspectBranchRequest) returns (BranchInfo) {}
  // ListBranch returns info about the heads of branches.
  rpc ListBranch(ListBranchRequest) returns (BranchInfos) {}
  // DeleteBranch deletes a branch; note that the commits still exist.
  rpc DeleteBranch(DeleteBranchRequest) returns (google.protobuf.Empty) {}

  // File rpcs
  // PutFile writes the specified file to pfs.
  rpc PutFile(stream PutFileRequest) returns (google.protobuf.Empty) {}
  // CopyFile copies the contents of one file to another.
  rpc CopyFile(CopyFileRequest) returns (google.protobuf.Empty) {}
  // GetFile returns a byte stream of the contents of the file.
  rpc GetFile(GetFileRequest) returns (stream google.protobuf.BytesValue) {}
  // InspectFile returns info about a file.
  rpc InspectFile(InspectFileRequest) returns (FileInfo) {}
  // ListFile returns info about all files. This is deprecated in favor of
  // ListFileStream
  rpc ListFile(ListFileRequest) returns (FileInfos) {}
  // ListFileStream is a streaming version of ListFile
  // TODO(msteffen): When the dash has been updated to use ListFileStream,
  // replace ListFile with this RPC (https://github.com/pachyderm/dash/issues/201)
  rpc ListFileStream(ListFileRequest) returns (stream FileInfo) {}
  // WalkFile walks over all the files under a directory, including children of children.
  rpc WalkFile(WalkFileRequest) returns (stream FileInfo) {}
  // GlobFile returns info about all files. This is deprecated in favor of
  // GlobFileStream
  rpc GlobFile(GlobFileRequest) returns (FileInfos) {}
  // GlobFileStream is a streaming version of GlobFile
  // TODO(msteffen): When the dash has been updated to use GlobFileStream,
  // replace GlobFile with this RPC (https://github.com/pachyderm/dash/issues/201)
  rpc GlobFileStream(GlobFileRequest) returns (stream FileInfo) {}
  // DiffFile returns the differences between 2 paths at 2 commits.
  rpc DiffFile(DiffFileRequest) returns (DiffFileResponse) {}
  // DeleteFile deletes a file.
  rpc DeleteFile(DeleteFileRequest) returns (google.protobuf.Empty) {}

  // DeleteAll deletes everything
  rpc DeleteAll(google.protobuf.Empty) returns (google.protobuf.Empty) {}
  // Fsck does a file system consistency check for pfs
  rpc Fsck(FsckRequest) returns (stream FsckResponse) {}

  // RPCs specific to Pachyderm 2.
  rpc FileOperationV2(stream FileOperationRequestV2) returns (google.protobuf.Empty) {}
  rpc GetTarV2(GetTarRequestV2) returns (stream google.protobuf.BytesValue) {}
  // DiffFileV2 returns the differences between 2 paths at 2 commits.
  // it streams back one file at a time which is either from the new path, or the old path
  rpc DiffFileV2(DiffFileRequest) returns (stream DiffFileResponseV2) {}
  // CreateTmpFileSet creates a new temp fileset
  rpc CreateTmpFileSet(stream FileOperationRequestV2) returns (CreateTmpFileSetResponse) {}
  // RenewTmpFileSet prevents the temporary fileset from being deleted for a set amount of time
  rpc RenewTmpFileSet(RenewTmpFileSetRequest) returns (google.protobuf.Empty) {}
  // ClearCommitV2 removes all data from the commit.
  rpc ClearCommitV2(ClearCommitRequestV2) returns (google.protobuf.Empty) {}
}

message PutObjectRequest {
  bytes value = 1;
  repeated Tag tags = 2;
  Block block = 3;
}

message CreateObjectRequest {
  Object object = 1;
  BlockRef block_ref = 2;
}

message GetObjectsRequest {
  repeated Object objects = 1;
  uint64 offset_bytes = 2;
  // The number of bytes requested.
  uint64 size_bytes = 3;
  // The total amount of bytes in these objects.  It's OK if it's not
  // entirely accurate or if it's unknown (in which case it'd be set to 0).
  // It's used primarily as a hint for cache eviction.
  uint64 total_size = 4;
}

message PutBlockRequest {
  Block block = 1;
  bytes value = 2;
}

message GetBlockRequest {
  Block block = 1;
}

message GetBlocksRequest {
  repeated BlockRef blockRefs = 1;
  uint64 offset_bytes = 2;
  // The number of bytes requested.
  uint64 size_bytes = 3;
  // The total amount of bytes in these blocks.  It's OK if it's not
  // entirely accurate or if it's unknown (in which case it'd be set to 0).
  // It's used primarily as a hint for cache eviction.
  uint64 total_size = 4;
}

message ListBlockRequest {}

message TagObjectRequest {
  Object object = 1;
  repeated Tag tags = 2;
}

message ListObjectsRequest {}

message ListTagsRequest {
  string prefix = 1;
  bool include_object = 2;
}

message ListTagsResponse {
  Tag tag = 1;
  Object object = 2;
}

message DeleteObjectsRequest {
  repeated Object objects = 1;
}

message DeleteObjectsResponse {}

message DeleteTagsRequest {
  repeated Tag tags = 1;
}

message DeleteTagsResponse {}

message CheckObjectRequest {
  Object object = 1;
}

message CheckObjectResponse {
  bool exists = 1;
}

message Objects {
  repeated Object objects = 1;
}

message PutObjDirectRequest {
  string obj = 1;
  bytes value = 2;
}

message GetObjDirectRequest {
  string obj = 1;
}

message DeleteObjDirectRequest {
  // The 'object' and 'prefix' fields are mutually exclusive.

  // Delete a single object by its path.
  string object = 1;

  // Delete all objects with paths matching this prefix, cannot be applied to
  // the core storage layer paths, as those are generally not safe to delete
  // (use garbage collection for that). This is for deleting objects generated
  // vi `PutObjDirect`.
  string prefix = 2;
}

service ObjectAPI {
  rpc PutObject(stream PutObjectRequest) returns (Object) {}
  rpc PutObjectSplit(stream PutObjectRequest) returns (Objects) {}
  rpc PutObjects(stream PutObjectRequest) returns (google.protobuf.Empty) {}
  rpc CreateObject(CreateObjectRequest) returns (google.protobuf.Empty) {}
  rpc GetObject(Object) returns (stream google.protobuf.BytesValue) {}
  rpc GetObjects(GetObjectsRequest) returns (stream google.protobuf.BytesValue) {}
  rpc PutBlock(stream PutBlockRequest) returns (google.protobuf.Empty) {}
  rpc GetBlock(GetBlockRequest) returns (stream google.protobuf.BytesValue) {}
  rpc GetBlocks(GetBlocksRequest) returns (stream google.protobuf.BytesValue) {}
  rpc ListBlock(ListBlockRequest) returns (stream Block) {}
  rpc TagObject(TagObjectRequest) returns (google.protobuf.Empty) {}
  rpc InspectObject(Object) returns (ObjectInfo) {}
  // CheckObject checks if an object exists in the blob store without
  // actually reading the object.
  rpc CheckObject(CheckObjectRequest) returns (CheckObjectResponse) {}
  rpc ListObjects(ListObjectsRequest) returns (stream ObjectInfo) {}
  rpc DeleteObjects(DeleteObjectsRequest) returns (DeleteObjectsResponse) {}
  rpc GetTag(Tag) returns (stream google.protobuf.BytesValue) {}
  rpc InspectTag(Tag) returns (ObjectInfo) {}
  rpc ListTags(ListTagsRequest) returns (stream ListTagsResponse) {}
  rpc DeleteTags(DeleteTagsRequest) returns (DeleteTagsResponse) {}
  rpc Compact(google.protobuf.Empty) returns (google.protobuf.Empty) {}
  // PutObjDirect puts an obj directly into object store, bypassing the content
  // addressing layer.
  rpc PutObjDirect(stream PutObjDirectRequest) returns (google.protobuf.Empty) {}
  // GetObjDirect gets an obj directly out of object store, bypassing the
  // content addressing layer.
  rpc GetObjDirect(GetObjDirectRequest) returns (stream google.protobuf.BytesValue) {}
  rpc DeleteObjDirect(DeleteObjDirectRequest) returns (google.protobuf.Empty) {}
}

message ObjectIndex {
  map<string, BlockRef> objects = 1;
  map<string, Object> tags = 2;
}