diff --git a/core-buffer/include/buffer_config.hpp b/core-buffer/include/buffer_config.hpp
index 78d0ae7..7f42752 100644
--- a/core-buffer/include/buffer_config.hpp
+++ b/core-buffer/include/buffer_config.hpp
@@ -27,8 +27,6 @@ namespace core_buffer {
     // How many frames do we read at once during replay.
     const size_t REPLAY_READ_BLOCK_SIZE = 100;
 
-    // How long should the RECV queue be.
-    const size_t STREAM_RCV_QUEUE_SIZE = 100;
 
     // Size of sf_buffer RB in elements.
     const size_t BUFFER_INTERNAL_QUEUE_SIZE = 1000;
@@ -39,8 +37,14 @@ namespace core_buffer {
     // Microseconds timeout for UDP recv.
     const int BUFFER_UDP_US_TIMEOUT = 5 * 1000;
 
-    // Output queue length for buffer live stream.
-    const int BUFFER_LIVE_SEND_HWM = 100;
+    // HWM for live stream from buffer.
+    const int BUFFER_ZMQ_SNDHWM = 100;
+
+    // N of IO threads to receive data from modules.
+    const int STREAM_ZMQ_IO_THREADS = 4;
+
+    // How long should the RECV queue be.
+    const size_t STREAM_RCVHWM = 100;
 
     // ZMQ threads for receiving data from sf_replay.
     const int WRITER_ZMQ_IO_THREADS = 2;
diff --git a/core-buffer/src/LiveRecvModule.cpp b/core-buffer/src/LiveRecvModule.cpp
index cbaabec..58381b5 100644
--- a/core-buffer/src/LiveRecvModule.cpp
+++ b/core-buffer/src/LiveRecvModule.cpp
@@ -48,7 +48,7 @@ void* LiveRecvModule::connect_socket(size_t module_id)
         throw runtime_error(zmq_strerror(errno));
     }
 
-    int rcvhwm = STREAM_RCV_QUEUE_SIZE;
+    int rcvhwm = STREAM_RCVHWM;
     if (zmq_setsockopt(sock, ZMQ_RCVHWM, &rcvhwm, sizeof(rcvhwm)) != 0) {
         throw runtime_error(zmq_strerror(errno));
     }
diff --git a/scripts/JF07-stream.service b/scripts/JF07-stream.service
index d41554b..84046fc 100644
--- a/scripts/JF07-stream.service
+++ b/scripts/JF07-stream.service
@@ -7,6 +7,7 @@ Type=idle
 User=root
 ExecStart=/usr/bin/sh /home/writer/git/sf_daq_buffer/scripts/JF07-stream.sh
 TimeoutStartSec=10
+Restart=on-failure
 RestartSec=10
 
 [Install]
diff --git a/sf-buffer/src/sf_buffer.cpp b/sf-buffer/src/sf_buffer.cpp
index 539133e..1f23f9e 100644
--- a/sf-buffer/src/sf_buffer.cpp
+++ b/sf-buffer/src/sf_buffer.cpp
@@ -40,7 +40,7 @@ int main (int argc, char *argv[]) {
     auto ctx = zmq_ctx_new();
     auto socket = zmq_socket(ctx, ZMQ_PUB);
 
-    const int sndhwm = BUFFER_LIVE_SEND_HWM;
+    const int sndhwm = BUFFER_ZMQ_SNDHWM;
     if (zmq_setsockopt(socket, ZMQ_SNDHWM, &sndhwm, sizeof(sndhwm)) != 0)
         throw runtime_error(strerror (errno));
 
diff --git a/sf-buffer/src/sf_replay.cpp b/sf-buffer/src/sf_replay.cpp
index ff9915a..6b26788 100644
--- a/sf-buffer/src/sf_replay.cpp
+++ b/sf-buffer/src/sf_replay.cpp
@@ -83,16 +83,6 @@ void sf_replay (
 
         string filename = filename_base + filename_suffix.path;
 
-        #ifdef DEBUG_OUTPUT
-            using namespace date;
-            using namespace chrono;
-
-            cout << "[" << system_clock::now() << "]";
-            cout << "[sf_replay::sf_replay]";
-
-            cout << " Reading from filename " << filename << endl;
-        #endif
-
         for (size_t file_index_offset=0;
              file_index_offset < FILE_MOD;
              file_index_offset += REPLAY_READ_BLOCK_SIZE)
@@ -161,16 +151,6 @@ void sf_replay (
                          MODULE_N_BYTES,
                          0);
 
-                #ifdef DEBUG_OUTPUT
-                    using namespace date;
-                    using namespace chrono;
-
-                    cout << "[" << system_clock::now() << "]";
-                    cout << "[sf_replay::sf_replay]";
-                    cout << " Sent pulse_id ";
-                    cout << current_pulse_id << endl;
-                #endif
-
                 current_pulse_id++;
             }
         }
@@ -204,22 +184,6 @@ int main (int argc, char *argv[]) {
     ipc_stream << "ipc:///tmp/sf-replay-" << (int)module_id;
     const auto ipc_address = ipc_stream.str();
 
-    #ifdef DEBUG_OUTPUT
-        using namespace date;
-        using namespace chrono;
-
-        cout << "[" << system_clock::now() << "]";
-        cout << "[sf_replay::receive]";
-
-        cout << " device " << device;
-        cout << " channel_name " << channel_name;
-        cout << " module_id " << module_id;
-        cout << " start_pulse_id " << start_pulse_id;
-        cout << " stop_pulse_id " << stop_pulse_id;
-        cout << " ipc_address " << ipc_address;
-        cout << endl;
-    #endif
-
     auto ctx = zmq_ctx_new();
     auto socket = zmq_socket(ctx, ZMQ_PUSH);
 
diff --git a/sf-buffer/src/sf_stream.cpp b/sf-buffer/src/sf_stream.cpp
index 9aecb44..15ce4ec 100644
--- a/sf-buffer/src/sf_stream.cpp
+++ b/sf-buffer/src/sf_stream.cpp
@@ -45,7 +45,7 @@ int main (int argc, char *argv[])
             WRITER_RB_BUFFER_SLOTS);
 
     auto ctx = zmq_ctx_new();
-    zmq_ctx_set (ctx, ZMQ_IO_THREADS, WRITER_ZMQ_IO_THREADS);
+    zmq_ctx_set (ctx, ZMQ_IO_THREADS, STREAM_ZMQ_IO_THREADS);
     string ipc_prefix = "ipc:///tmp/sf-live-";
 
     LiveRecvModule recv_module(queue, n_modules, ctx, ipc_prefix);