chore(20379): Enable FileChannel api and DontSync (#20381)

Signed-off-by: mxtartaglia <[email protected]>

Author: mxtartaglia-sl

platform-sdk/swirlds-platform-core/src/main/java/com/swirlds/platform/event/preconsensus/PcesConfig.java

@@ -86,6 +86,6 @@ public record PcesConfig(
         @ConfigProperty(defaultValue = "1ms") Duration replayHealthThreshold,
         @ConfigProperty(defaultValue = "true") boolean limitReplayFrequency,
         @ConfigProperty(defaultValue = "5000") int maxEventReplayFrequency,
-        @ConfigProperty(defaultValue = "EVERY_SELF_EVENT") FileSyncOption inlinePcesSyncOption,
-        @ConfigProperty(defaultValue = "OUTPUT_STREAM") PcesFileWriterType pcesFileWriterType,
+        @ConfigProperty(defaultValue = "DONT_SYNC") FileSyncOption inlinePcesSyncOption,
+        @ConfigProperty(defaultValue = "FILE_CHANNEL") PcesFileWriterType pcesFileWriterType,
         @ConfigProperty(defaultValue = "OUTPUT_STREAM") PcesFileWriterType macPcesFileWriterType) {}

platform-sdk/swirlds-platform-core/src/main/java/com/swirlds/platform/event/preconsensus/PcesFileChannelWriter.java

@@ -65,10 +65,10 @@ public void writeVersion(final int version) throws IOException {
     @Override
     public long writeEvent(@NonNull final GossipEvent event) throws IOException {
         final int size = GossipEvent.PROTOBUF.measureRecord(event);
-        final boolean expandBuffer = size > buffer.capacity();
+        final boolean expandBuffer = (size + Integer.BYTES) > buffer.capacity();
         if (expandBuffer) {
             MemoryUtils.closeDirectByteBuffer(buffer);
-            buffer = ByteBuffer.allocateDirect(size);
+            buffer = ByteBuffer.allocateDirect(size + Integer.BYTES);
             writableSequentialData = BufferedData.wrap(buffer);
         }
         buffer.putInt(size);