szetszwo commented on pull request #299:
URL: https://github.com/apache/incubator-ratis/pull/299#issuecomment-734039981
@runzhiwang , thanks for merging this.
Btw, just have checked FileChannelImpl.write(ByteBuffer). It will call
```
//FileChannelImpl.write
IOUtil.write(this.fd, var1, -1L, this.nd);
```
and then
```
//IOUtil.write
static int write(FileDescriptor var0, ByteBuffer var1, long var2,
NativeDispatcher var4) throws IOException {
if (var1 instanceof DirectBuffer) {
return writeFromNativeBuffer(var0, var1, var2, var4);
```
I suspect writeFromNativeBuffer is already zero-copy. If it is the case,
the current server implementation is working fine.
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