LIU-213 docker and plasma shared memory improvements

daliuge-engine/dlg/apps/dockerapp.py

@@ -235,6 +235,9 @@ def initialize(self, **kwargs):
         self._portMappings = self._getArg(kwargs, "portMappings", "")
         logger.info(f"portMappings: {self._portMappings}")
 
+        self._shmSize = self._getArg(kwargs, "shmSize", "")
+        logger.info(f"shmSize: {self._shmSize}")
+
         # Additional volume bindings can be specified for existing files/dirs
         # on the host system. They are given either as a list or as a
         # comma-separated string
@@ -428,6 +431,7 @@ def run(self):
             environment=env,
             working_dir=self.workdir,
             init=True,
+            shm_size=self._shmSize,
             # auto_remove=self._removeContainer,
             detach=True,
         )

daliuge-engine/dlg/drop.py

@@ -43,6 +43,7 @@
 import sys
 import inspect
 import binascii
+from typing import Union
 
 import numpy as np
 
@@ -58,6 +59,7 @@
 from .event import EventFirer
 from .exceptions import InvalidDropException, InvalidRelationshipException
 from .io import (
+    DataIO,
     OpenMode,
     FileIO,
     MemoryIO,
@@ -524,7 +526,7 @@ def isBeingRead(self):
             return self._refCount > 0
 
     @track_current_drop
-    def write(self, data, **kwargs):
+    def write(self, data: Union[bytes, memoryview], **kwargs):
         """
         Writes the given `data` into this DROP. This method is only meant
         to be called while the DROP is in INITIALIZED or WRITING state;
@@ -595,7 +597,7 @@ def write(self, data, **kwargs):
         return nbytes
 
     @abstractmethod
-    def getIO(self):
+    def getIO(self) -> DataIO:
         """
         Returns an instance of one of the `dlg.io.DataIO` instances that
         handles the data contents of this DROP.
@@ -2083,6 +2085,7 @@ class PlasmaDROP(AbstractDROP):
 
     object_id = dlg_string_param("object_id", None)
     plasma_path = dlg_string_param("plasma_path", "/tmp/plasma")
+    use_staging = dlg_bool_param("use_staging", False)
 
     def initialize(self, **kwargs):
         object_id = self.uid
@@ -2092,7 +2095,10 @@ def initialize(self, **kwargs):
             self.object_id = object_id
 
     def getIO(self):
-        return PlasmaIO(plasma.ObjectID(self.object_id), self.plasma_path)
+        return PlasmaIO(plasma.ObjectID(self.object_id),
+                                        self.plasma_path,
+                                        expected_size=self._expectedSize,
+                                        use_staging=self.use_staging)
 
     @property
     def dataURL(self):

daliuge-engine/dlg/io.py

@@ -78,7 +78,7 @@ def open(self, mode, **kwargs):
         self._mode = mode
         self._desc = self._open(**kwargs)
 
-    def write(self, data, **kwargs):
+    def write(self, data, **kwargs) -> int:
         """
         Writes `data` into the storage
         """
@@ -148,8 +148,8 @@ def _read(self, count, **kwargs):
         pass
 
     @abstractmethod
-    def _write(self, data, **kwargs):
-        pass
+    def _write(self, data, **kwargs) -> int:
+        return 0
 
     @abstractmethod
     def _close(self, **kwargs):
@@ -611,20 +611,41 @@ def IOForURL(url):
 
 
 class PlasmaIO(DataIO):
-    def __init__(self, object_id, plasma_path="/tmp/plasma"):
+    """
+    A shared-memory IO reader/writer implemented using plasma store
+    memory buffers. Note: not compatible with PlasmaClient put()/get()
+    which performs data pickling before writing.
+    """
+    _desc: plasma.PlasmaClient
+
+    def __init__(self, object_id: plasma.ObjectID, plasma_path="/tmp/plasma", expected_size:Optional[int]=None, use_staging=False):
+        """Initializer
+        Args:
+            object_id (plasma.ObjectID): 20 bytes unique object id
+            plasma_path (str, optional): The socket file path visible to all shared processes. Defaults to "/tmp/plasma".
+            expected_size (Optional[int], optional) Total size of data to allocate to buffer if known. Defaults to None.
+            use_staging (bool, optional): Whether to stream first to a resizable staging buffer. Defaults to False.
+        """
         super(PlasmaIO, self).__init__()
         self._plasma_path = plasma_path
         self._object_id = object_id
         self._reader = None
         self._writer = None
+        self._expected_size = expected_size if expected_size > 0 else None
+        self.use_staging = use_staging
 
     def _open(self, **kwargs):
         return plasma.connect(self._plasma_path)
 
     def _close(self, **kwargs):
         if self._writer:
-            self._desc.put_raw_buffer(self._writer.getvalue(), self._object_id)
-            self._writer.close()
+            if self.use_staging:
+                self._desc.put_raw_buffer(self._writer.getbuffer(), self._object_id)
+                self._writer.close()
+            else:
+                self._desc.seal(self._object_id)
+                print(self._desc.list())
+                self._writer.close()
         if self._reader:
             self._reader.close()
 
@@ -634,10 +655,33 @@ def _read(self, count, **kwargs):
             self._reader = pyarrow.BufferReader(data)
         return self._reader.read1(count)
 
-    def _write(self, data, **kwargs):
-        if not self._writer:
-            # use client.create and FixedSizeBufferWriter
-            self._writer = pyarrow.BufferOutputStream()
+    def _write(self, data: Union[memoryview, bytes, bytearray, pyarrow.Buffer], **kwargs):
+        """
+        Writes data into the PlasmaIO reserved buffer.
+        If use_staging is False and expected_size is None, only a single write may occur.
+        If use_staging is False and expected_size is > 0, multiple writes up to expected size may occur.
+        If use_staging is True, any number of writes may occur with small performance penalty.
+        """
+
+        # NOTE: data must be a collection of bytes for len to represent the buffer bytesize
+        assert isinstance(data, Union[memoryview, bytes, bytearray, pyarrow.Buffer].__args__)
+        databytes = data.nbytes if isinstance(data, memoryview) else len(data)
+
+        if self.use_staging:
+            if not self._writer:
+                # write into a resizable staging buffer
+                self._writer = io.BytesIO()
+        else:
+            if not self._writer:
+                # write directly into fixed size plasma buffer
+                self._bufferbytes = self._expected_size if self._expected_size is not None else databytes
+                plasma_buffer = self._desc.create(self._object_id, self._bufferbytes)
+                self._writer = pyarrow.FixedSizeBufferWriter(plasma_buffer)
+            if self._writer.tell() + databytes > self._bufferbytes:
+                raise Exception("".join([f"attempted to write {self._writer.tell() + databytes} ",
+                                f"bytes to plasma buffer of size {self._bufferbytes}, ",
+                                "consider using staging or expected_size argument"]))
+
         self._writer.write(data)
         return len(data)
 
@@ -654,6 +698,8 @@ def buffer(self) -> memoryview:
 
 
 class PlasmaFlightIO(DataIO):
+    _desc: PlasmaFlightClient
+
     def __init__(
         self,
         object_id: plasma.ObjectID,
@@ -666,7 +712,7 @@ def __init__(
         self._object_id = object_id
         self._plasma_path = plasma_path
         self._flight_path = flight_path
-        self._size = size
+        self._nbytes = size
         self._reader = None
         self._writer = None
 
@@ -676,11 +722,11 @@ def _open(self, **kwargs):
 
     def _close(self, **kwargs):
         if self._writer:
-            if self._size == -1:
+            if self._nbytes == -1:
                 self._desc.put(self._writer.getvalue(), self._object_id)
                 self._writer.close()
             else:
-                assert self._size == self._writer.tell()
+                assert self._nbytes == self._writer.tell()
                 self._desc.seal(self._object_id)
         if self._reader:
             self._reader.close()
@@ -693,15 +739,15 @@ def _read(self, count, **kwargs):
 
     def _write(self, data, **kwargs):
         if not self._writer:
-            if self._size == -1:
+            if self._nbytes == -1:
                 # stream into resizeable buffer
                 logger.warning(
                     "Using dynamically sized Plasma buffer. Performance may be reduced."
                 )
                 self._writer = pyarrow.BufferOutputStream()
             else:
                 # optimally write directly to fixed size plasma buffer
-                self._buffer = self._desc.create(self._object_id, self._size)
+                self._buffer = self._desc.create(self._object_id, self._nbytes)
                 self._writer = pyarrow.FixedSizeBufferWriter(self._buffer)
         self._writer.write(data)
         return len(data)

daliuge-engine/test/test_drop.py

@@ -208,7 +208,8 @@ def _test_dynamic_write_withDropType(self, dropType):
         without an expected drop size (for app compatibility and not
         recommended in production)
         """
-        a = dropType("oid:A", "uid:A", expectedSize=-1)
+        # NOTE: use_staging required for multiple writes to plasma drops
+        a = dropType("oid:A", "uid:A", expectedSize=-1, use_staging=True)
         b = SumupContainerChecksum("oid:B", "uid:B")
         c = InMemoryDROP("oid:C", "uid:C")
         b.addInput(a)

daliuge-translator/dlg/dropmake/pg_generator.py

@@ -747,8 +747,9 @@ def _create_test_drop_spec(self, oid, rank, kwargs) -> dropdict:
             kwargs["removeContainer"] = self.str_to_bool(
                 str(self.jd.get("removeContainer", "1"))
             )
-            kwargs["portMappings"] = str(self.jd.get("portMappings", ""))
             kwargs["additionalBindings"] = str(self.jd.get("additionalBindings", ""))
+            kwargs["portMappings"] = str(self.jd.get("portMappings", ""))
+            kwargs["shmSize"] = str(self.jd.get("shmSize",""))
             drop_spec.update(kwargs)
 
         elif drop_type == Categories.GROUP_BY: