z.DeleteMarkersFailed, err = dc.ReadInt64()
			if err != nil {
				err = msgp.WrapError(err, "DeleteMarkersFailed")
				return
			}
		case "bt":
			z.BytesTransferred, err = dc.ReadInt64()
			if err != nil {
				err = msgp.WrapError(err, "BytesTransferred")
				return
			}
		case "bf":
			z.BytesFailed, err = dc.ReadInt64()
			if err != nil {
				err = msgp.WrapError(err, "BytesFailed")
				return
			}

	DeleteMarkers       int64 `json:"deleteMarkers" msg:"dm"`
	ObjectsFailed       int64 `json:"objectsFailed" msg:"obf"`
	DeleteMarkersFailed int64 `json:"deleteMarkersFailed" msg:"dmf"`
	BytesTransferred    int64 `json:"bytesTransferred" msg:"bt"`
	BytesFailed         int64 `json:"bytesFailed" msg:"bf"`
}

const (
	batchReplName         = "batch-replicate.bin"
	batchReplFormat       = 1
	batchReplVersionV1    = 1

    rc = sendfile(dst_fd, src_fd, &offset, static_cast<size_t>(chunk));
    if (rc < 0) return -1;
    bytes_transferred += rc;
  }

  return bytes_transferred;
}

      rc = write(dst_fd, buffer.get() + total_write, chunk - total_write);
      if (rc < 0) return -1;

      total_write += rc;
      bytes_transferred += rc;
      offset += rc;
    }
  }

  return bytes_transferred;
}

                 std::vector<char>* out) {
  out->clear();
  out->resize(n, 0);
  TF_Status status;
  auto bytes_transferred =
      cache->Read(filename, offset, n, out->data(), &status);
  if (bytes_transferred >= 0) {
    EXPECT_LE(bytes_transferred, n);
    out->resize(bytes_transferred, n);
  }
  return status.status;
}

TEST(RamFileBlockCacheTest, IsCacheEnabled) {

        block->data.resize(block_size_, 0);
        int64_t bytes_transferred;
        bytes_transferred = block_fetcher_(key.first, key.second, block_size_,
                                           block->data.data(), status);
        block->mu.Lock();  // Reacquire the lock immediately afterwards
        if (TF_GetCode(status) == TF_OK) {
          block->data.resize(bytes_transferred, 0);