diff --git a/examples/mnist/1_machine_2_gpu.resource b/examples/mnist/1_machine_2_gpu.resource
index f3aff8820d040c53875e7ad68e1c471ce0409bfc..2f0e3efe8efba62a4e6f43f2ce6c7763243592e7 100644
--- a/examples/mnist/1_machine_2_gpu.resource
+++ b/examples/mnist/1_machine_2_gpu.resource
@@ -1,7 +1,7 @@
 machine {
   addr: "127.0.0.1"
   port: 7099
-  name: "first"
+  id: 0
 }
 
 gpu_device_num: 2
diff --git a/examples/mnist/predict.other b/examples/mnist/predict.other
index 2573b86d1fa38657ad54cdd68ad6c1e384259c2c..3567362399ebd92c55b0edfc7aef473be6e5dace 100644
--- a/examples/mnist/predict.other
+++ b/examples/mnist/predict.other
@@ -1,4 +1,8 @@
-globalfs_conf {
+data_fs_conf {
+  localfs_conf {
+  }
+}
+snapshot_fs_conf {
   localfs_conf {
   }
 }
diff --git a/examples/mnist/predict.placement b/examples/mnist/predict.placement
index ef53618c92e73c2098e04599d6a5710ef35e7a77..fd3a7ea85ad603aa05af8e5f4327419a4f0077e8 100644
--- a/examples/mnist/predict.placement
+++ b/examples/mnist/predict.placement
@@ -5,7 +5,7 @@ placement_group {
   }
   parallel_conf {
     policy: kDataParallel
-    device_name: "first:cpu:0-1"
+    device_name: "0:cpu:0-1"
   }
 }
 
@@ -25,6 +25,6 @@ placement_group {
   }
   parallel_conf {
     policy: kDataParallel
-    device_name: "first:gpu:0-1"
+    device_name: "0:gpu:0-1"
   }
 }
diff --git a/examples/mnist/train.other b/examples/mnist/train.other
index e680c8593f9841f8230f90fb53b5d9a3409b2e86..107eab323a6e06d70daa0a43cf90d426440a9771 100644
--- a/examples/mnist/train.other
+++ b/examples/mnist/train.other
@@ -1,4 +1,8 @@
-globalfs_conf {
+data_fs_conf {
+  localfs_conf {
+  }
+}
+snapshot_fs_conf {
   localfs_conf {
   }
 }
diff --git a/examples/mnist/train.placement b/examples/mnist/train.placement
index 8f8cc002bfbc399759ae58002d841cd5dcdf9fbb..2a91392c48081bb16164f63ba340cce4a175343b 100644
--- a/examples/mnist/train.placement
+++ b/examples/mnist/train.placement
@@ -4,7 +4,7 @@ placement_group {
   }
   parallel_conf {
     policy: kDataParallel
-    device_name: "first:cpu:0-1"
+    device_name: "0:cpu:0-1"
   }
 }
 
@@ -24,6 +24,6 @@ placement_group {
   }
   parallel_conf {
     policy: kDataParallel
-    device_name: "first:gpu:0-1"
+    device_name: "0:gpu:0-1"
   }
 }
diff --git a/oneflow/core/common/util.cpp b/oneflow/core/common/util.cpp
index 33bca071d95d01c06e59bf52fc71c353dbb2de9a..0b703abc301b8b8e849fa3bda5b7ec7ce8d92ca8 100644
--- a/oneflow/core/common/util.cpp
+++ b/oneflow/core/common/util.cpp
@@ -7,6 +7,8 @@
 #include <sys/sysinfo.h>
 #endif
 
+DEFINE_int64(this_machine_id, -1, "");
+
 namespace oneflow {
 
 #define DEFINE_ONEFLOW_STR2INT_CAST(dst_type, cast_func) \
@@ -86,4 +88,9 @@ size_t GetAvailableCpuMemSize() {
   return 0;
 }
 
+std::string LogDir() {
+  std::string v = FLAGS_log_dir + "/" + std::to_string(FLAGS_this_machine_id);
+  return v;
+}
+
 }  // namespace oneflow
diff --git a/oneflow/core/common/util.h b/oneflow/core/common/util.h
index 79ba7e5e2a1181b176649b16f418315f32cb2cf8..a87d073a4486312b0afd568764f4e50e2e3e4451 100644
--- a/oneflow/core/common/util.h
+++ b/oneflow/core/common/util.h
@@ -26,6 +26,7 @@
 #include "oneflow/core/common/meta_util.hpp"
 
 DECLARE_string(log_dir);
+DECLARE_int64(this_machine_id);
 
 namespace std {
 template<typename T0, typename T1>
@@ -121,10 +122,7 @@ inline std::string NewUniqueId() {
   return std::to_string(id++);
 }
 
-inline const std::string& LogDir() {
-  static std::string v = FLAGS_log_dir;
-  return v;
-}
+std::string LogDir();
 
 template<typename K, typename V>
 void EraseIf(HashMap<K, V>* hash_map, std::function<bool(typename HashMap<K, V>::iterator)> cond) {
diff --git a/oneflow/core/graph/graph.h b/oneflow/core/graph/graph.h
index f295dc1b9985e71e5f081b7022f71c781d060ca2..7b8de5479a85748d8bf5f06c873ea9aabbe53983 100644
--- a/oneflow/core/graph/graph.h
+++ b/oneflow/core/graph/graph.h
@@ -4,7 +4,7 @@
 #include <stack>
 #include "oneflow/core/common/str_util.h"
 #include "oneflow/core/graph/node.h"
-#include "oneflow/core/persistence/persistent_out_stream.h"
+#include "oneflow/core/persistence/tee_persistent_log_stream.h"
 
 namespace oneflow {
 
@@ -161,15 +161,13 @@ void Graph<NodeType, EdgeType>::ToDotWithStream(StreamT& out_stream) {
 
 template<typename NodeType, typename EdgeType>
 void Graph<NodeType, EdgeType>::ToDotWithFilePath(const std::string& file_path) {
-  std::string dir_name = Dirname(file_path);
-  if (!LocalFS()->IsDirectory(dir_name)) { LocalFS()->RecursivelyCreateDir(dir_name); }
-  PersistentOutStream out_stream(LocalFS(), file_path);
-  ToDotWithStream(out_stream);
+  auto log_stream = TeePersistentLogStream::Create(file_path);
+  ToDotWithStream(log_stream);
 }
 
 template<typename NodeType, typename EdgeType>
 void Graph<NodeType, EdgeType>::ToDotWithAutoFilePath() {
-  std::string file_path = LogDir() + "/dot/" + TypeName() + "/" + NewUniqueId() + ".dot";
+  std::string file_path = JoinPath("dot", TypeName(), NewUniqueId() + ".dot");
   ToDotWithFilePath(file_path);
 }
 
diff --git a/oneflow/core/graph/logical_graph.cpp b/oneflow/core/graph/logical_graph.cpp
index 38894d9ee2192866c482398d609d62f481037837..e34899e1c3701c916950c64dc50e5b9e64e7d92b 100644
--- a/oneflow/core/graph/logical_graph.cpp
+++ b/oneflow/core/graph/logical_graph.cpp
@@ -330,7 +330,7 @@ void LogicalGraph::BuildLossPrintStruct() {
     std::shared_ptr<Operator> loss_print_op = ConstructOp(loss_print_op_conf);
     ParallelConf loss_print_pr_conf;
     loss_print_pr_conf.set_policy(kDataParallel);
-    loss_print_pr_conf.add_device_name(Global<JobDesc>::Get()->MachineName4MachineId(0) + ":cpu:1");
+    loss_print_pr_conf.add_device_name("0:cpu:1");
     LossPrintLogicalNode* loss_print_logical = NewNode<LossPrintLogicalNode>();
     loss_print_logical->mut_op_vec() = {loss_print_op};
     loss_print_logical->mut_parallel_desc().reset(new ParallelDesc(loss_print_pr_conf));
@@ -363,8 +363,7 @@ void LogicalGraph::BuildAccuracyPrintStruct() {
     std::shared_ptr<Operator> accuracy_print_op = ConstructOp(accuracy_print_op_conf);
     ParallelConf accuracy_print_pr_conf;
     accuracy_print_pr_conf.set_policy(kDataParallel);
-    accuracy_print_pr_conf.add_device_name(Global<JobDesc>::Get()->MachineName4MachineId(0)
-                                           + ":cpu:1");
+    accuracy_print_pr_conf.add_device_name("0:cpu:1");
     AccuracyPrintLogicalNode* accuracy_print_logical = NewNode<AccuracyPrintLogicalNode>();
     accuracy_print_logical->mut_op_vec() = {accuracy_print_op};
     accuracy_print_logical->mut_parallel_desc().reset(new ParallelDesc(accuracy_print_pr_conf));
@@ -544,10 +543,13 @@ MdSaveLogicalNode* LogicalGraph::BuildMdSaveStruct(const ForwardLogicalNode* fw_
   auto md_save_logical = NewNode<MdSaveLogicalNode>();
   md_save_logical->mut_op_vec() = {model_save_op};
   auto md_save_pr_desc = new ParallelDesc(*(fw_logical->parallel_desc()));
+  md_save_pr_desc->set_device_type(DeviceType::kCPU);
   if (fw_logical->parallel_desc()->policy() == ParallelPolicy::kDataParallel) {
     md_save_pr_desc->RandomSelectOneDeviceAndRemoveTheOthers();
   }
-  md_save_pr_desc->set_device_type(DeviceType::kCPU);
+  if (Global<JobDesc>::Get()->write_snapshot_to_master()) {
+    md_save_pr_desc->UseCPUDevicesOnMaster();
+  }
   md_save_logical->mut_parallel_desc().reset(md_save_pr_desc);
   Connect<LogicalNode>(need_save_logical, NewEdge(), md_save_logical);
   return md_save_logical;
diff --git a/oneflow/core/job/compiler.cpp b/oneflow/core/job/compiler.cpp
index dff291eefc72a5c5577bbab204b544e950f9a7be..1c651f142591a32dc9623f7e2f3d447df1be4ba3 100644
--- a/oneflow/core/job/compiler.cpp
+++ b/oneflow/core/job/compiler.cpp
@@ -1,4 +1,5 @@
 #include "oneflow/core/job/compiler.h"
+#include "oneflow/core/persistence/tee_persistent_log_stream.h"
 #include "oneflow/core/device/cudnn_conv_ctx_cache.h"
 
 namespace oneflow {
@@ -6,11 +7,11 @@ namespace oneflow {
 namespace {
 
 void ToDotFile(const Plan& plan, const std::string& filepath) {
-  PersistentOutStream out_stream(LocalFS(), filepath);
-  out_stream << "digraph {\n";
+  auto log_stream = TeePersistentLogStream::Create(filepath);
+  log_stream << "digraph {\n";
   HashSet<int64_t> regst_desc_ids;
   for (const TaskProto& task_proto : plan.task()) {
-    out_stream << "task" << std::to_string(task_proto.task_id()) << "[label=\""
+    log_stream << "task" << std::to_string(task_proto.task_id()) << "[label=\""
                << std::to_string(task_proto.task_id()) << "\\n"
                << std::to_string(task_proto.machine_id()) << ":"
                << std::to_string(task_proto.thrd_id()) << ":"
@@ -23,23 +24,23 @@ void ToDotFile(const Plan& plan, const std::string& filepath) {
     }
   }
   for (const int64_t regst_task_id : regst_desc_ids) {
-    out_stream << "regst_desc" << std::to_string(regst_task_id) << "[label=\""
+    log_stream << "regst_desc" << std::to_string(regst_task_id) << "[label=\""
                << std::to_string(regst_task_id) << "\", shape=box];\n";
   }
   for (const TaskProto& task_proto : plan.task()) {
     for (const auto& pair : task_proto.produced_regst_desc()) {
-      out_stream << "task" << std::to_string(task_proto.task_id()) << "->regst_desc"
+      log_stream << "task" << std::to_string(task_proto.task_id()) << "->regst_desc"
                  << std::to_string(pair.second.regst_desc_id()) << "[label=\"" << pair.first
                  << "\"];\n";
     }
     for (const auto& pair : task_proto.consumed_regst_desc_id()) {
       for (int64_t regst_desc_id : pair.second.regst_desc_id()) {
-        out_stream << "regst_desc" << std::to_string(regst_desc_id) << "->task"
+        log_stream << "regst_desc" << std::to_string(regst_desc_id) << "->task"
                    << std::to_string(task_proto.task_id()) << "[label=\"" << pair.first << "\"];\n";
       }
     }
   }
-  out_stream << "}\n";
+  log_stream << "}\n";
 }
 
 }  // namespace
@@ -120,7 +121,7 @@ Plan Compiler::DoCompile() {
   });
   plan.set_total_mbn_num(total_mbn_num);
   GenNetTopo(&plan);
-  ToDotFile(plan, JoinPath(LogDir(), "/dot/plan.dot"));
+  ToDotFile(plan, "/dot/plan.dot");
 #ifdef WITH_CUDA
   Global<CudnnConvCtxCache>::Delete();
 #endif
diff --git a/oneflow/core/job/job_conf.proto b/oneflow/core/job/job_conf.proto
index 87324361d5a9759ce22f48c81e3922822160717b..91df5dc811d4448d333a6969dedeb96a5050023d 100644
--- a/oneflow/core/job/job_conf.proto
+++ b/oneflow/core/job/job_conf.proto
@@ -27,19 +27,22 @@ message PredictConf {
 message LocalFsConf {
 }
 
+message NetworkFsConf {
+}
+
 message HdfsConf {
   required string namenode = 1;
 }
 
-message GlobalFSConf {
+message FileSystemConf {
   oneof fs_type {
     LocalFsConf localfs_conf = 1;
-    HdfsConf hdfs_conf = 2;
+    NetworkFsConf networkfs_conf = 2;
+    HdfsConf hdfs_conf = 3;
   }
 }
 
 message OtherConf {
-  required GlobalFSConf globalfs_conf = 1;
   required int64 piece_size = 2;
   required int32 data_part_num = 3; // piece_size % data_part_num = 0
 
@@ -64,6 +67,9 @@ message OtherConf {
   optional bool enable_write_snapshot = 130 [default = true];
   optional bool enable_blob_mem_sharing = 140 [default = true];
 
+  required FileSystemConf data_fs_conf = 121;
+  required FileSystemConf snapshot_fs_conf = 122;
+
   oneof JobType {
     TrainConf train_conf = 200;
     PredictConf predict_conf = 201;
diff --git a/oneflow/core/job/job_desc.cpp b/oneflow/core/job/job_desc.cpp
index 0f81c8d2f71b5b0c5b1c71754a68528518af0f8a..ba3f91ca533373a2e6055deb56360cc118ea3900 100644
--- a/oneflow/core/job/job_desc.cpp
+++ b/oneflow/core/job/job_desc.cpp
@@ -5,15 +5,6 @@
 
 namespace oneflow {
 
-int64_t JobDesc::MachineID4MachineName(const std::string& machine_name) const {
-  auto it = machine_name2machine_id_.find(machine_name);
-  CHECK(it != machine_name2machine_id_.end()) << "Undefined machine name: " << machine_name;
-  return it->second;
-}
-const std::string& JobDesc::MachineName4MachineId(int64_t machine_id) const {
-  return machine_id2machine_name_.at(machine_id);
-}
-
 int64_t JobDesc::piece_num_of_experiment_phase() const {
   return job_conf_.other().piece_num_of_experiment_phase();
 }
@@ -87,6 +78,11 @@ float JobDesc::L2() const {
 
 int32_t JobDesc::DataPartNum() const { return job_conf_.other().data_part_num(); }
 
+const FileSystemConf& JobDesc::data_fs_conf() const { return job_conf_.other().data_fs_conf(); }
+const FileSystemConf& JobDesc::snapshot_fs_conf() const {
+  return job_conf_.other().snapshot_fs_conf();
+}
+
 JobDesc::JobDesc(const std::string& job_conf_filepath) {
   if (TryParseProtoFromTextFile(job_conf_filepath, &job_conf_) == false) {
     JobConf2 job_conf;
@@ -96,7 +92,7 @@ JobDesc::JobDesc(const std::string& job_conf_filepath) {
     ParseProtoFromTextFile(job_conf.placement(), job_conf_.mutable_placement());
     ParseProtoFromTextFile(job_conf.other(), job_conf_.mutable_other());
   }
-
+  SanityCheck();
   SplitDecodeOps();
   AddRecordLoadOps();
 #ifndef WITH_RDMA
@@ -123,12 +119,13 @@ JobDesc::JobDesc(const std::string& job_conf_filepath) {
 #ifndef WITH_CUDA
   CHECK_EQ(job_conf_.resource().gpu_device_num(), 0);
 #endif
+}
+
+void JobDesc::SanityCheck() {
   int64_t machine_num = job_conf_.resource().machine_size();
-  for (int64_t i = 0; i < machine_num; ++i) {
-    const std::string& machine_name = job_conf_.resource().machine(i).name();
-    CHECK(machine_name2machine_id_.emplace(machine_name, i).second);
-    CHECK(machine_id2machine_name_.emplace(i, machine_name).second);
-  }
+  FOR_RANGE(int64_t, i, 0, machine_num) { CHECK_EQ(job_conf_.resource().machine(i).id(), i); }
+  CHECK_GE(FLAGS_this_machine_id, 0);
+  CHECK_LT(FLAGS_this_machine_id, machine_num);
 }
 
 void JobDesc::SplitDecodeOps() {
diff --git a/oneflow/core/job/job_desc.h b/oneflow/core/job/job_desc.h
index 6f6a69c19fb6f6dca6bd31a0c7dea76b07c2929e..e1ced00cd63f85420e76168bf33624670d8335f6 100644
--- a/oneflow/core/job/job_desc.h
+++ b/oneflow/core/job/job_desc.h
@@ -47,16 +47,15 @@ class JobDesc final {
   size_t rdma_recv_msg_buf_byte() const;
   bool collect_act_event() const { return job_conf_.other().collect_act_event(); }
   bool enable_mem_sharing() const { return job_conf_.other().enable_mem_sharing(); }
+  const FileSystemConf& data_fs_conf() const;
+  const FileSystemConf& snapshot_fs_conf() const;
   bool enable_write_snapshot() const {
     return IsTrain() && job_conf_.other().enable_write_snapshot();
   }
+  bool write_snapshot_to_master() const { return snapshot_fs_conf().has_localfs_conf(); }
   bool enable_blob_mem_sharing() const { return job_conf_.other().enable_blob_mem_sharing(); }
   int64_t reduce_group_size() const { return job_conf_.other().reduce_group_size(); }
 
-  // machine_name <-> machine_id
-  int64_t MachineID4MachineName(const std::string& machine_name) const;
-  const std::string& MachineName4MachineId(int64_t machine_id) const;
-
   // Train conf
   const std::string& MdSaveSnapshotsPath() const;
   int32_t NumOfBatchesInSnapshot() const;
@@ -73,13 +72,11 @@ class JobDesc final {
  private:
   friend class Global<JobDesc>;
   JobDesc(const std::string& job_conf_filepath);
+  void SanityCheck();
   void SplitDecodeOps();
   void AddRecordLoadOps();
 
   JobConf1 job_conf_;
-
-  HashMap<std::string, int64_t> machine_name2machine_id_;
-  HashMap<int64_t, std::string> machine_id2machine_name_;
 };
 
 }  // namespace oneflow
diff --git a/oneflow/core/job/machine_context.cpp b/oneflow/core/job/machine_context.cpp
index 235d917846b0c4e4efd01a5f32e76ce34836e349..97bf0062bfa1c1a39dd73055a8d9831bdb2be92d 100644
--- a/oneflow/core/job/machine_context.cpp
+++ b/oneflow/core/job/machine_context.cpp
@@ -7,9 +7,7 @@ std::string MachineCtx::GetCtrlAddr(int64_t machine_id) const {
   return mchn.addr() + ":" + std::to_string(mchn.port());
 }
 
-MachineCtx::MachineCtx(const std::string& this_mchn_name) {
-  this_machine_id_ = Global<JobDesc>::Get()->MachineID4MachineName(this_mchn_name);
-  LOG(INFO) << "this machine name: " << this_mchn_name;
+MachineCtx::MachineCtx(int64_t this_mchn_id) : this_machine_id_(this_mchn_id) {
   LOG(INFO) << "this machine id: " << this_machine_id_;
 }
 
diff --git a/oneflow/core/job/machine_context.h b/oneflow/core/job/machine_context.h
index cc5c8e6b7f0e3a20c51136b7021f5a0b3d8f2577..d08acc90ae6540dfaf67ade657f488e2acf65e1b 100644
--- a/oneflow/core/job/machine_context.h
+++ b/oneflow/core/job/machine_context.h
@@ -19,7 +19,7 @@ class MachineCtx final {
 
  private:
   friend class Global<MachineCtx>;
-  MachineCtx(const std::string& this_mchn_name);
+  MachineCtx(int64_t this_mchn_id);
 
   int64_t this_machine_id_;
 };
diff --git a/oneflow/core/job/oneflow.cpp b/oneflow/core/job/oneflow.cpp
index b00ae6f206216f0545a3f172d5eb3f670f01c13e..8821a93b5f97fe1d85257ebf95294f0c2f93df62 100644
--- a/oneflow/core/job/oneflow.cpp
+++ b/oneflow/core/job/oneflow.cpp
@@ -10,6 +10,7 @@
 #include "oneflow/core/job/plan.pb.h"
 #include "oneflow/core/job/runtime.h"
 #include "oneflow/core/job/available_memory_desc.pb.h"
+#include "oneflow/core/persistence/tee_persistent_log_stream.h"
 #include "oneflow/core/persistence/file_system.h"
 #include "oneflow/core/actor/act_event_logger.h"
 
@@ -150,10 +151,10 @@ bool HasRelayPlacement() {
   for (const PlacementGroup& p_group : placement.placement_group()) {
     const ParallelConf& p_conf = p_group.parallel_conf();
     for (const std::string& device_name : p_conf.device_name()) {
-      std::string mchn_name;
+      int64_t mchn_id;
       std::string device_tag;
       std::string device_id_str;
-      ParseDeviceNameConf(device_name, &mchn_name, &device_tag, &device_id_str);
+      ParseDeviceNameConf(device_name, &mchn_id, &device_tag, &device_id_str);
       if (device_tag == "cpu") {
         break;
       } else if (device_tag == "gpu") {
@@ -177,16 +178,16 @@ class Oneflow final {
   OF_DISALLOW_COPY_AND_MOVE(Oneflow);
   ~Oneflow() = default;
 
-  Oneflow(const std::string& job_conf_filepath, const std::string& this_mchn_name);
+  Oneflow(const std::string& job_conf_filepath, int64_t this_mchn_id);
 
  private:
   std::unique_ptr<CtrlServer> ctrl_server_;
 };
 
-Oneflow::Oneflow(const std::string& job_conf_filepath, const std::string& this_mchn_name) {
+Oneflow::Oneflow(const std::string& job_conf_filepath, int64_t this_mchn_id) {
   // New All Global
   Global<JobDesc>::New(job_conf_filepath);
-  Global<MachineCtx>::New(this_mchn_name);
+  Global<MachineCtx>::New(this_mchn_id);
   const MachineCtx* machine_ctx = Global<MachineCtx>::Get();
   bool DoProfile =
       machine_ctx->IsThisMachineMaster() && Global<JobDesc>::Get()->collect_act_event();
@@ -216,15 +217,15 @@ Oneflow::Oneflow(const std::string& job_conf_filepath, const std::string& this_m
     PullPlan("mem_shared_plan", &mem_shared_plan);
   }
   OF_BARRIER();
-  PrintProtoToTextFile(naive_plan, JoinPath(LogDir(), "naive_plan"));
-  PrintProtoToTextFile(mem_shared_plan, JoinPath(LogDir(), "mem_shared_plan"));
+  TeePersistentLogStream::Create("naive_plan")->Write(naive_plan);
+  TeePersistentLogStream::Create("mem_shared_plan")->Write(mem_shared_plan);
   LOG(INFO) << "push_pull_plan:" << GetCurTime() - start;
   if (HasRelayPlacement()) {
     // Experiment Runtime
     { Runtime experiment_run(mem_shared_plan, true); }
     // Improve
     if (machine_ctx->IsThisMachineMaster()) {
-      PrintProtoToTextFile(amd, JoinPath(LogDir(), "available_mem_desc"));
+      TeePersistentLogStream::Create("available_mem_desc")->Write(amd);
       CHECK_GT(amd.machine_amd_size(), 0);
       improved_plan = Improver().Improve(
           amd, naive_plan, JoinPath(LogDir(), ActEventLogger::experiment_act_event_bin_filename()));
@@ -233,7 +234,7 @@ Oneflow::Oneflow(const std::string& job_conf_filepath, const std::string& this_m
       PullPlan("improved_plan", &improved_plan);
     }
     OF_BARRIER();
-    PrintProtoToTextFile(improved_plan, JoinPath(LogDir(), "improved_plan"));
+    TeePersistentLogStream::Create("improved_plan")->Write(improved_plan);
     Global<CtrlClient>::Get()->Clear();
     OF_BARRIER();
   } else {
@@ -257,16 +258,16 @@ Oneflow::Oneflow(const std::string& job_conf_filepath, const std::string& this_m
 }  // namespace oneflow
 
 DEFINE_string(job_conf, "", "");
-DEFINE_string(this_machine_name, "", "");
 
 int main(int argc, char** argv) {
   using namespace oneflow;
   google::InitGoogleLogging(argv[0]);
   gflags::SetVersionString(BuildVersionString());
   gflags::ParseCommandLineFlags(&argc, &argv, true);
+  CHECK_GE(FLAGS_this_machine_id, 0);
   LocalFS()->RecursivelyCreateDirIfNotExist(LogDir());
   RedirectStdoutAndStderrToGlogDir();
-  { Oneflow flow(FLAGS_job_conf, FLAGS_this_machine_name); }
+  { Oneflow flow(FLAGS_job_conf, FLAGS_this_machine_id); }
   CloseStdoutAndStderr();
   return 0;
 }
diff --git a/oneflow/core/job/parallel_desc.cpp b/oneflow/core/job/parallel_desc.cpp
index 315a33d45e1d11affeb4791a12e6b982ad93cf59..e1c5a0ef7284a731d46bd6617fef15c6a2e9c945 100644
--- a/oneflow/core/job/parallel_desc.cpp
+++ b/oneflow/core/job/parallel_desc.cpp
@@ -1,14 +1,15 @@
 #include "oneflow/core/job/parallel_desc.h"
+#include "oneflow/core/common/util.h"
 
 namespace oneflow {
 
-void ParseDeviceNameConf(const std::string& device_name, std::string* mchn_name,
-                         std::string* device_tag, std::string* device_id_str) {
+void ParseDeviceNameConf(const std::string& device_name, int64_t* mchn_id, std::string* device_tag,
+                         std::string* device_id_str) {
   size_t second_delimiter_pos = device_name.rfind(":");
   CHECK_NE(second_delimiter_pos, std::string::npos);
   size_t first_delimiter_pos = device_name.rfind(":", second_delimiter_pos - 1);
   CHECK_NE(first_delimiter_pos, std::string::npos);
-  *mchn_name = device_name.substr(0, first_delimiter_pos);
+  *mchn_id = oneflow_cast<int64_t>(device_name.substr(0, first_delimiter_pos));
   *device_tag =
       device_name.substr(first_delimiter_pos + 1, second_delimiter_pos - first_delimiter_pos - 1);
   *device_id_str = device_name.substr(second_delimiter_pos + 1);
@@ -16,14 +17,14 @@ void ParseDeviceNameConf(const std::string& device_name, std::string* mchn_name,
 
 ParallelDesc::ParallelDesc(const ParallelConf& user_conf) {
   policy_ = user_conf.policy();
-  HashSet<std::string> machine_name_set;
+  HashSet<int64_t> machine_id_set;
   device_type_ = DeviceType::kInvalidDevice;
   for (const std::string& device_name : user_conf.device_name()) {
-    std::string mchn_name;
+    int64_t mchn_id;
     std::string device_tag;
     std::string device_id_str;
-    ParseDeviceNameConf(device_name, &mchn_name, &device_tag, &device_id_str);
-    machine_name_set.insert(mchn_name);
+    ParseDeviceNameConf(device_name, &mchn_id, &device_tag, &device_id_str);
+    machine_id_set.insert(mchn_id);
     if (device_tag == "cpu") {
       CHECK_STREQ(device_tag.c_str(), "cpu");
       CHECK(device_type_ == DeviceType::kInvalidDevice || device_type_ == DeviceType::kCPU);
@@ -33,8 +34,7 @@ ParallelDesc::ParallelDesc(const ParallelConf& user_conf) {
       CHECK(device_type_ == DeviceType::kInvalidDevice || device_type_ == DeviceType::kGPU);
       device_type_ = DeviceType::kGPU;
     }
-    int64_t machine_id = Global<JobDesc>::Get()->MachineID4MachineName(mchn_name);
-    sorted_machine_ids_.push_back(machine_id);
+    sorted_machine_ids_.push_back(mchn_id);
     int64_t minus_pos = device_id_str.find("-");
     if (minus_pos == std::string::npos) {
       device_id_str = device_id_str + "-" + device_id_str;
@@ -47,11 +47,11 @@ ParallelDesc::ParallelDesc(const ParallelConf& user_conf) {
       if (device_type_ == DeviceType::kGPU) {
         CHECK_LT(dev_phy_id, Global<JobDesc>::Get()->GpuDeviceNum());
       }
-      machine_id2sorted_dev_phy_ids_[machine_id].push_back(dev_phy_id);
+      machine_id2sorted_dev_phy_ids_[mchn_id].push_back(dev_phy_id);
     }
   }
   ClearUp();
-  CheckValidity();
+  SanityCheck();
 }
 
 void ParallelDesc::RemoveNeedlessDevice(const std::string& op_name, int32_t max_device_num) {
@@ -104,6 +104,13 @@ void ParallelDesc::RandomSelectOneDeviceAndRemoveTheOthers() {
   parallel_num_ = 1;
 }
 
+void ParallelDesc::UseCPUDevicesOnMaster() {
+  sorted_machine_ids_ = {0};
+  std::vector<int64_t> sorted_dev_phy_ids(parallel_num_);
+  std::iota(sorted_dev_phy_ids.begin(), sorted_dev_phy_ids.end(), 0);
+  machine_id2sorted_dev_phy_ids_ = {{0, sorted_dev_phy_ids}};
+}
+
 bool ParallelDesc::Equal(const ParallelDesc& rhs) const {
   return device_type_ == rhs.device_type_ && policy_ == rhs.policy_
          && sorted_machine_ids_ == rhs.sorted_machine_ids_
@@ -124,7 +131,7 @@ void ParallelDesc::ClearUp() {
   SortAndRemoveDuplication(&sorted_machine_ids_);
 }
 
-void ParallelDesc::CheckValidity() {
+void ParallelDesc::SanityCheck() {
   device_num_of_each_machine_ = -1;
   for (auto& pair : machine_id2sorted_dev_phy_ids_) {
     if (device_num_of_each_machine_ == -1) {
diff --git a/oneflow/core/job/parallel_desc.h b/oneflow/core/job/parallel_desc.h
index 5042fc44c4c0ab24ad957fb6509d3f2ede2cf0bc..224d24816a9180ab0f672628e840e522148a6841 100644
--- a/oneflow/core/job/parallel_desc.h
+++ b/oneflow/core/job/parallel_desc.h
@@ -8,8 +8,8 @@
 
 namespace oneflow {
 
-void ParseDeviceNameConf(const std::string& device_name, std::string* mchn_name,
-                         std::string* device_tag, std::string* device_id_str);
+void ParseDeviceNameConf(const std::string& device_name, int64_t* mchn_id, std::string* device_tag,
+                         std::string* device_id_str);
 
 class ParallelDesc {
  public:
@@ -35,6 +35,7 @@ class ParallelDesc {
   void RemoveNeedlessDevice(const std::string& op_name, int32_t max_device_num);
   void RemoveNeedlessDevice(int32_t max_device_num) { RemoveNeedlessDevice("", max_device_num); }
   void RandomSelectOneDeviceAndRemoveTheOthers();
+  void UseCPUDevicesOnMaster();
 
   //
   bool Equal(const ParallelDesc& rhs) const;
@@ -42,7 +43,7 @@ class ParallelDesc {
 
  private:
   void ClearUp();
-  void CheckValidity();
+  void SanityCheck();
 
   DeviceType device_type_;
   ParallelPolicy policy_;
diff --git a/oneflow/core/job/profiler.cpp b/oneflow/core/job/profiler.cpp
index 8b10ed028ad7ca446bc9b545b20b956ca7628b69..69df13b0e72e7341756aa63c3a3b044bb15ff8b2 100644
--- a/oneflow/core/job/profiler.cpp
+++ b/oneflow/core/job/profiler.cpp
@@ -1,6 +1,6 @@
 #include "oneflow/core/job/profiler.h"
 #include "oneflow/core/job/job_desc.h"
-#include "oneflow/core/persistence/persistent_out_stream.h"
+#include "oneflow/core/persistence/tee_persistent_log_stream.h"
 #include "oneflow/core/common/str_util.h"
 #include "oneflow/core/actor/act_event_logger.h"
 
@@ -84,7 +84,7 @@ void Profiler::Profile(const Plan& plan, const std::string& act_event_filepath)
             [](const ProfileInfoPair& lhs, const ProfileInfoPair& rhs) {
               return lhs.second.CalcBottleNeckScore() > rhs.second.CalcBottleNeckScore();
             });
-  PersistentOutStream out_stream(LocalFS(), JoinPath(LogDir(), "oneflow.profile"));
+  auto log_stream = TeePersistentLogStream::Create("oneflow.profile");
   double mdupdt_act_interval = 0.0;
   int32_t mdupdt_task_num = 0;
   for (const ProfileInfoPair& pair : profile_info_vec) {
@@ -93,10 +93,10 @@ void Profiler::Profile(const Plan& plan, const std::string& act_event_filepath)
       mdupdt_act_interval += pair.second.avg_act_interval();
     }
   }
-  out_stream << "time_of_one_batch:" << std::to_string(mdupdt_act_interval / mdupdt_task_num)
+  log_stream << "time_of_one_batch:" << std::to_string(mdupdt_act_interval / mdupdt_task_num)
              << "\n";
   for (const ProfileInfoPair& pair : profile_info_vec) {
-    out_stream << "actor_id:" << std::to_string(pair.first)
+    log_stream << "actor_id:" << std::to_string(pair.first)
                << " act_num: " << std::to_string(pair.second.act_num())
                << " avg_act_time:" << std::to_string(pair.second.avg_act_time())
                << " avg_act_interval:" << std::to_string(pair.second.avg_act_interval())
diff --git a/oneflow/core/job/resource.proto b/oneflow/core/job/resource.proto
index ffb3117ae35983db1464e4fcc329b3d8435121e5..454b120a9a8dc80e9d2808e7f4773aec2ea087c2 100644
--- a/oneflow/core/job/resource.proto
+++ b/oneflow/core/job/resource.proto
@@ -4,7 +4,7 @@ package oneflow;
 message Machine {
   required string addr = 1; // domain name or ip
   required int32 port = 2;
-  required string name = 3;
+  required int64 id = 3;
 }
 
 enum DeviceType {
diff --git a/oneflow/core/job/runtime.cpp b/oneflow/core/job/runtime.cpp
index 730e5ee8ee46dee46d6248ef51f1593de8426423..cd39d4d979be63ec88d39efb1c3b1ebac22b92b6 100644
--- a/oneflow/core/job/runtime.cpp
+++ b/oneflow/core/job/runtime.cpp
@@ -89,7 +89,8 @@ void Runtime::NewAllGlobal(const Plan& plan, bool is_experiment_phase) {
     }
   }
   Global<RuntimeCtx>::New(piece_num, is_experiment_phase);
-  if (Global<RuntimeCtx>::Get()->NeedCollectActEvent()) {
+  if (Global<MachineCtx>::Get()->IsThisMachineMaster()
+      && Global<RuntimeCtx>::Get()->NeedCollectActEvent()) {
     Global<ActEventLogger>::New(is_experiment_phase);
   }
   if (job_desc->TotalMachineNum() > 1) {
diff --git a/oneflow/core/kernel/kernel_util.cpp b/oneflow/core/kernel/kernel_util.cpp
index 4ebf58e84e83935d73325b739ae9b457bfb904fe..af5140207e46bbb7d7c4ef2f41d23fd9a5ac01d5 100644
--- a/oneflow/core/kernel/kernel_util.cpp
+++ b/oneflow/core/kernel/kernel_util.cpp
@@ -263,11 +263,11 @@ KU_IF_METHOD InitializeWithDir(DeviceCtx* ctx, int32_t part_id, int32_t part_num
   int64_t blob_size = blob->ByteSizeOfDataContentField();
   int64_t byte_size_of_each_dim = num_in_each_dim * sizeof(T);
   std::string file_path = JoinPath(model_dir, bn_in_op);
-  uint64_t file_size = GlobalFS()->GetFileSize(file_path);
+  uint64_t file_size = SnapshotFS()->GetFileSize(file_path);
   CHECK_EQ(file_size, dim_num * byte_size_of_each_dim);
   BalancedSplitter splitter = BalancedSplitter(dim_num, part_num);
   int64_t begin_pos = splitter.At(part_id).begin() * byte_size_of_each_dim;
-  PersistentInStream in_stream(GlobalFS(), file_path, begin_pos);
+  PersistentInStream in_stream(SnapshotFS(), file_path, begin_pos);
   in_stream.Read(blob->mut_dptr<char>(), blob_size);
 }
 
diff --git a/oneflow/core/kernel/print_kernel.cpp b/oneflow/core/kernel/print_kernel.cpp
index 8d505a499e42c3e5aa540b619d7a4732dedd488e..607c314251ab00c8cf68119b6bec689aae5150ac 100644
--- a/oneflow/core/kernel/print_kernel.cpp
+++ b/oneflow/core/kernel/print_kernel.cpp
@@ -7,13 +7,13 @@ namespace oneflow {
 void PrintKernel::VirtualKernelInit(const ParallelContext* parallel_ctx) {
   const auto& conf = op_conf().print_conf();
   const std::string& root_path = conf.print_dir();
-  OfCallOnce(root_path, GlobalFS(), &fs::FileSystem::RecursivelyCreateDir);
+  OfCallOnce(root_path, SnapshotFS(), &fs::FileSystem::RecursivelyCreateDir);
   int32_t part_name_suffix_length = conf.part_name_suffix_length();
   std::string num = std::to_string(parallel_ctx->parallel_id());
   int32_t zero_count = std::max(part_name_suffix_length - static_cast<int32_t>(num.length()), 0);
   std::string file_path =
       JoinPath(root_path, conf.part_name_prefix() + std::string(zero_count, '0') + num);
-  out_stream_.reset(new PersistentOutStream(GlobalFS(), file_path));
+  out_stream_.reset(new PersistentOutStream(SnapshotFS(), file_path));
 }
 
 void PrintKernel::Forward(const KernelCtx& ctx,
diff --git a/oneflow/core/kernel/record_load_kernel.cpp b/oneflow/core/kernel/record_load_kernel.cpp
index d5c1710c81ef614d8447abeafca5222b915f977a..600c5006d233f21e758cc7addf620d218ea36826 100644
--- a/oneflow/core/kernel/record_load_kernel.cpp
+++ b/oneflow/core/kernel/record_load_kernel.cpp
@@ -22,13 +22,10 @@ void RecordLoadKernel::VirtualKernelInit(const ParallelContext* parallel_ctx) {
     data_paths.push_back(JoinPath(data_dir, part_name_prefix + std::string(zero_count, '0') + num));
   }
   if (Global<JobDesc>::Get()->IsTrain()) {
-    if (Global<JobDesc>::Get()->save_downloaded_file_to_local_fs() && GlobalFS() != LocalFS()) {
-      in_stream_.reset(new PersistentInStream(GlobalFS(), data_paths, true, true));
-    } else {
-      in_stream_.reset(new PersistentInStream(GlobalFS(), data_paths, true, false));
-    }
+    in_stream_.reset(new PersistentInStream(
+        DataFS(), data_paths, true, Global<JobDesc>::Get()->save_downloaded_file_to_local_fs()));
   } else {
-    in_stream_.reset(new PersistentInStream(GlobalFS(), data_paths, false, false));
+    in_stream_.reset(new PersistentInStream(DataFS(), data_paths, false, false));
   }
   int64_t global_piece_size = Global<JobDesc>::Get()->PieceSize();
   CHECK_EQ(global_piece_size % parallel_ctx->parallel_num(), 0);
diff --git a/oneflow/core/persistence/file_system.cpp b/oneflow/core/persistence/file_system.cpp
index 96edff75b3f41740af694cd297338bcaa19acadc..48eaaff199f34fad7f8acc87860836cb67d8af2c 100644
--- a/oneflow/core/persistence/file_system.cpp
+++ b/oneflow/core/persistence/file_system.cpp
@@ -90,21 +90,6 @@ void FileSystem::RecursivelyCreateDir(const std::string& dirname) {
   }
 }
 
-struct GlobalFSConstructor {
-  GlobalFSConstructor() {
-    const GlobalFSConf& gfs_conf = Global<JobDesc>::Get()->other_conf().globalfs_conf();
-    if (gfs_conf.has_localfs_conf()) {
-      CHECK_EQ(Global<JobDesc>::Get()->resource().machine().size(), 1);
-      gfs = LocalFS();
-    } else if (gfs_conf.has_hdfs_conf()) {
-      gfs = new HadoopFileSystem(gfs_conf.hdfs_conf());
-    } else {
-      UNIMPLEMENTED();
-    }
-  }
-  FileSystem* gfs;
-};
-
 }  // namespace fs
 
 fs::FileSystem* LocalFS() {
@@ -116,9 +101,25 @@ fs::FileSystem* LocalFS() {
   return fs;
 }
 
-fs::FileSystem* GlobalFS() {
-  static fs::GlobalFSConstructor gfs_constructor;
-  return gfs_constructor.gfs;
+fs::FileSystem* NetworkFS() { return LocalFS(); }
+
+fs::FileSystem* HadoopFS(const HdfsConf& hdfs_conf) {
+  static fs::FileSystem* fs = new fs::HadoopFileSystem(hdfs_conf);
+  return fs;
+}
+
+fs::FileSystem* GetFS(const FileSystemConf& file_system_conf) {
+  if (file_system_conf.has_localfs_conf()) {
+    return LocalFS();
+  } else if (file_system_conf.has_networkfs_conf()) {
+    return NetworkFS();
+  } else if (file_system_conf.has_hdfs_conf()) {
+    return HadoopFS(file_system_conf.hdfs_conf());
+  } else {
+    UNIMPLEMENTED();
+  }
 }
 
+fs::FileSystem* DataFS() { return GetFS(Global<JobDesc>::Get()->data_fs_conf()); }
+fs::FileSystem* SnapshotFS() { return GetFS(Global<JobDesc>::Get()->snapshot_fs_conf()); }
 }  // namespace oneflow
diff --git a/oneflow/core/persistence/file_system.h b/oneflow/core/persistence/file_system.h
index 6644f7c7134248cb09f0dfc2526586058c152982..3ef591c06caa8d08a4a0501b001fd659004a7109 100644
--- a/oneflow/core/persistence/file_system.h
+++ b/oneflow/core/persistence/file_system.h
@@ -3,6 +3,7 @@
 
 #include "oneflow/core/common/platform.h"
 #include "oneflow/core/common/util.h"
+#include "oneflow/core/job/job_conf.pb.h"
 
 namespace oneflow {
 
@@ -153,8 +154,10 @@ class FileSystem {
 }  // namespace fs
 
 fs::FileSystem* LocalFS();
-fs::FileSystem* GlobalFS();
 
+fs::FileSystem* GetFS(const FileSystemConf& file_system_conf);
+fs::FileSystem* DataFS();
+fs::FileSystem* SnapshotFS();
 }  // namespace oneflow
 
 #endif  // ONEFLOW_CORE_PERSISTENCE_FILE_SYSTEM_H_
diff --git a/oneflow/core/persistence/snapshot.cpp b/oneflow/core/persistence/snapshot.cpp
index b8ab84ca3d2c02382f4757ee68ed399591ee03b0..1a8c44e2fa2d8ac50626827caceddfba6ea8d25d 100644
--- a/oneflow/core/persistence/snapshot.cpp
+++ b/oneflow/core/persistence/snapshot.cpp
@@ -6,7 +6,7 @@
 namespace oneflow {
 
 Snapshot::Snapshot(const std::string& snapshot_root_path) {
-  CHECK(GlobalFS()->IsDirectory(snapshot_root_path));
+  CHECK(SnapshotFS()->IsDirectory(snapshot_root_path));
   root_path_ = snapshot_root_path;
 }
 
@@ -18,13 +18,13 @@ std::unique_ptr<PersistentOutStream> Snapshot::GetOutStream(const LogicalBlobId&
                                                             int32_t part_id) {
   // op_name_dir
   std::string op_name_dir = JoinPath(root_path_, lbi.op_name());
-  OfCallOnce(op_name_dir, GlobalFS(), &fs::FileSystem::CreateDir);
+  OfCallOnce(op_name_dir, SnapshotFS(), &fs::FileSystem::CreateDir);
   // bn_in_op_tmp_dir
   std::string bn_in_op_tmp_dir = JoinPath(op_name_dir, lbi.blob_name() + "_tmp4a58");
-  OfCallOnce(bn_in_op_tmp_dir, GlobalFS(), &fs::FileSystem::CreateDir);
+  OfCallOnce(bn_in_op_tmp_dir, SnapshotFS(), &fs::FileSystem::CreateDir);
   // part_file
   std::string part_file = JoinPath(bn_in_op_tmp_dir, "part_" + std::to_string(part_id));
-  return std::make_unique<PersistentOutStream>(GlobalFS(), part_file);
+  return std::make_unique<PersistentOutStream>(SnapshotFS(), part_file);
 }
 
 void Snapshot::OnePartDone(const LogicalBlobId& lbi, int32_t part_id, int32_t part_num) {
@@ -41,12 +41,12 @@ void Snapshot::ConcatLbnFile(const LogicalBlobId& lbi, int32_t part_num,
   std::vector<char> buffer(Global<JobDesc>::Get()->persistence_buf_byte());
   std::string part_dir = JoinPath(root_path_, lbi.op_name(), lbi.blob_name() + "_tmp4a58");
   {
-    PersistentOutStream out_stream(GlobalFS(), concat_file);
+    PersistentOutStream out_stream(SnapshotFS(), concat_file);
     for (int32_t i = 0; i < part_num; ++i) {
       std::unique_ptr<fs::RandomAccessFile> part_file;
       std::string part_file_path = JoinPath(part_dir, "part_" + std::to_string(i));
-      GlobalFS()->NewRandomAccessFile(part_file_path, &part_file);
-      uint64_t part_file_size = GlobalFS()->GetFileSize(part_file_path);
+      SnapshotFS()->NewRandomAccessFile(part_file_path, &part_file);
+      uint64_t part_file_size = SnapshotFS()->GetFileSize(part_file_path);
       uint64_t offset = 0;
       while (offset < part_file_size) {
         uint64_t n = std::min(buffer.size(), part_file_size - offset);
@@ -54,15 +54,15 @@ void Snapshot::ConcatLbnFile(const LogicalBlobId& lbi, int32_t part_num,
         out_stream.Write(buffer.data(), n);
         offset += n;
       }
-      GlobalFS()->DelFile(part_file_path);
+      SnapshotFS()->DelFile(part_file_path);
     }
   }
-  GlobalFS()->DeleteDir(part_dir);
+  SnapshotFS()->DeleteDir(part_dir);
   std::string snapshot_done_path = JoinPath(root_path_, "snapshot_done");
   int32_t snapshot_done_cnt = Global<CtrlClient>::Get()->IncreaseCount(snapshot_done_path);
   if (snapshot_done_cnt == Global<SnapshotMgr>::Get()->total_mbn_num()) {
     Global<CtrlClient>::Get()->EraseCount(snapshot_done_path);
-    PersistentOutStream out_stream(GlobalFS(), snapshot_done_path);
+    PersistentOutStream out_stream(SnapshotFS(), snapshot_done_path);
   }
 }
 
diff --git a/oneflow/core/persistence/snapshot_manager.cpp b/oneflow/core/persistence/snapshot_manager.cpp
index b1034b7cd542412cee85b17161e818f1c20b9500..1891342a0762a37f428b90da052ee9a481425797 100644
--- a/oneflow/core/persistence/snapshot_manager.cpp
+++ b/oneflow/core/persistence/snapshot_manager.cpp
@@ -7,7 +7,7 @@ namespace oneflow {
 SnapshotMgr::SnapshotMgr(const Plan& plan) {
   if (Global<JobDesc>::Get()->enable_write_snapshot()) {
     model_save_snapshots_path_ = Global<JobDesc>::Get()->MdSaveSnapshotsPath();
-    OfCallOnce(model_save_snapshots_path_, GlobalFS(), &fs::FileSystem::MakeEmptyDir);
+    OfCallOnce(model_save_snapshots_path_, SnapshotFS(), &fs::FileSystem::MakeEmptyDir);
   }
   const std::string& load_path = Global<JobDesc>::Get()->MdLoadSnapshotPath();
   if (load_path != "") { readable_snapshot_.reset(new Snapshot(load_path)); }
@@ -21,7 +21,7 @@ Snapshot* SnapshotMgr::GetWriteableSnapshot(int64_t snapshot_id) {
   if (it == snapshot_id2writeable_snapshot_.end()) {
     std::string snapshot_root_path =
         JoinPath(model_save_snapshots_path_, "snapshot_" + std::to_string(snapshot_id));
-    OfCallOnce(snapshot_root_path, GlobalFS(), &fs::FileSystem::CreateDirIfNotExist);
+    OfCallOnce(snapshot_root_path, SnapshotFS(), &fs::FileSystem::CreateDirIfNotExist);
     std::unique_ptr<Snapshot> ret(new Snapshot(snapshot_root_path));
     auto emplace_ret = snapshot_id2writeable_snapshot_.emplace(snapshot_id, std::move(ret));
     it = emplace_ret.first;
diff --git a/oneflow/core/persistence/snapshot_test.cpp b/oneflow/core/persistence/snapshot_test.cpp
index aa6987f1932911ce1171162993df1c86ccddf1fd..81d98e2943bd1ac08ada9641fb94a1537574598a 100644
--- a/oneflow/core/persistence/snapshot_test.cpp
+++ b/oneflow/core/persistence/snapshot_test.cpp
@@ -8,19 +8,21 @@ namespace oneflow {
 TEST(Snapshot, write_and_read) {
   JobDescProto jb_desc_proto;
   auto job_conf = jb_desc_proto.mutable_job_conf();
-  auto gfs_conf = job_conf->mutable_global_fs_conf();
-  gfs_conf->set_allocated_localfs_conf(new LocalFsConf);
+  auto job_other = job_conf->mutable_other();
+  auto snapshot_path_conf = job_conf->mutable_other()->mutable_snapshot_path_conf();
+  snapshot_path_conf->set_allocated_localfs_conf(new LocalFsConf);
   auto resource = jb_desc_proto.mutable_resource();
   resource->add_machine();
   Global<JobDesc>::Get()->InitFromProto(jb_desc_proto);
+  fs::FileSystem* snapshot_fs = GetFS(Global<JobDesc>::Get()->snapshot_path_conf());
 
   std::string current_dir = GetCwd();
   StringReplace(&current_dir, '\\', '/');
   std::string snapshot_root_path = JoinPath(current_dir, "/tmp_snapshot_test_asdfasdf");
-  if (GlobalFS()->IsDirectory(snapshot_root_path)) {
-    ASSERT_TRUE(GlobalFS()->ListDir(snapshot_root_path).empty());
+  if (snapshot_fs->IsDirectory(snapshot_root_path)) {
+    ASSERT_TRUE(snapshot_fs->ListDir(snapshot_root_path).empty());
   } else {
-    GlobalFS()->CreateDir(snapshot_root_path);
+    snapshot_fs->CreateDir(snapshot_root_path);
   }
 
   std::string key = "key/name";
@@ -41,13 +43,13 @@ TEST(Snapshot, write_and_read) {
   // read
   {
     auto read_stream_ptr =
-        std::make_unique<NormalPersistentInStream>(GlobalFS(), JoinPath(snapshot_root_path, key));
+        std::make_unique<NormalPersistentInStream>(snapshot_fs, JoinPath(snapshot_root_path, key));
     std::string content;
     read_stream_ptr->ReadLine(&content);
     ASSERT_EQ(content, "ab");
   }
-  GlobalFS()->RecursivelyDeleteDir(snapshot_root_path);
-  ASSERT_TRUE(!GlobalFS()->IsDirectory(snapshot_root_path));
+  snapshot_fs->RecursivelyDeleteDir(snapshot_root_path);
+  ASSERT_TRUE(!snapshot_fs->IsDirectory(snapshot_root_path));
 }
 
 }  // namespace oneflow
diff --git a/oneflow/core/persistence/tee_persistent_log_stream.cpp b/oneflow/core/persistence/tee_persistent_log_stream.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..560a66ab5a64d4d505e41cd682dbc8bd81ee667e
--- /dev/null
+++ b/oneflow/core/persistence/tee_persistent_log_stream.cpp
@@ -0,0 +1,39 @@
+#include "oneflow/core/persistence/tee_persistent_log_stream.h"
+#include "oneflow/core/common/str_util.h"
+#include <google/protobuf/text_format.h>
+
+namespace oneflow {
+
+TeePersistentLogStream::TeePersistentLogStream(const std::string& path) {
+  destinations_.emplace_back(LocalFS(), LogDir());
+  branches_.reserve(destinations_.size());
+  for (const auto& destination : destinations_) {
+    branches_.emplace_back(std::make_unique<PersistentOutStream>(
+        destination.mut_file_system(), JoinPath(destination.base_dir(), path)));
+  }
+}
+
+TeePersistentLogStream::~TeePersistentLogStream() { Flush(); }
+
+std::unique_ptr<TeePersistentLogStream> TeePersistentLogStream::Create(const std::string& path) {
+  auto stream_ptr = new TeePersistentLogStream(path);
+  return std::unique_ptr<TeePersistentLogStream>(stream_ptr);
+}
+
+void TeePersistentLogStream::Flush() {
+  for (const auto& branch : branches_) { branch->Flush(); }
+};
+
+void TeePersistentLogStream::Write(const char* s, size_t n) {
+  for (const auto& branch : branches_) { branch->Write(s, n); }
+};
+
+void TeePersistentLogStream::Write(const std::string& str) { this->Write(str.data(), str.size()); }
+
+void TeePersistentLogStream::Write(const PbMessage& proto) {
+  std::string output;
+  google::protobuf::TextFormat::PrintToString(proto, &output);
+  this->Write(output);
+}
+
+}  // namespace oneflow
diff --git a/oneflow/core/persistence/tee_persistent_log_stream.h b/oneflow/core/persistence/tee_persistent_log_stream.h
new file mode 100644
index 0000000000000000000000000000000000000000..efe21e30ddb659810c413115e1416e17e594fdd6
--- /dev/null
+++ b/oneflow/core/persistence/tee_persistent_log_stream.h
@@ -0,0 +1,54 @@
+#ifndef ONEFLOW_CORE_PERSISTENCE_TEE_PERSISTENT_LOG_STREAM_H_
+#define ONEFLOW_CORE_PERSISTENCE_TEE_PERSISTENT_LOG_STREAM_H_
+
+#include "oneflow/core/common/protobuf.h"
+#include "oneflow/core/persistence/persistent_out_stream.h"
+
+namespace oneflow {
+
+class LogStreamDestination final {
+ public:
+  LogStreamDestination(fs::FileSystem* file_system, const std::string& base_dir)
+      : file_system_(file_system), base_dir_(base_dir) {}
+  ~LogStreamDestination() = default;
+  fs::FileSystem* mut_file_system() const { return file_system_; };
+  const std::string& base_dir() const { return base_dir_; };
+
+ private:
+  fs::FileSystem* file_system_;
+  std::string base_dir_;
+};
+
+class TeePersistentLogStream final {
+ public:
+  OF_DISALLOW_COPY_AND_MOVE(TeePersistentLogStream);
+  ~TeePersistentLogStream();
+
+  void Write(const char* s, size_t n);
+  void Write(const std::string& str);
+  void Write(const PbMessage& proto);
+
+  static std::unique_ptr<TeePersistentLogStream> Create(const std::string& path);
+
+ private:
+  explicit TeePersistentLogStream(const std::string& path);
+  void Flush();
+  std::vector<LogStreamDestination> destinations_;
+  std::vector<std::unique_ptr<PersistentOutStream>> branches_;
+};
+
+inline TeePersistentLogStream& operator<<(TeePersistentLogStream& log_stream,
+                                          const std::string& s) {
+  log_stream.Write(s.c_str(), s.size());
+  return log_stream;
+}
+
+inline std::unique_ptr<TeePersistentLogStream>& operator<<(
+    std::unique_ptr<TeePersistentLogStream>& log_stream, const std::string& s) {
+  log_stream->Write(s.c_str(), s.size());
+  return log_stream;
+}
+
+}  // namespace oneflow
+
+#endif  // ONEFLOW_CORE_PERSISTENCE_TEE_PERSISTENT_LOG_STREAM_H_