By default, synchronization is bi-directional: data is both uploaded and downloaded. However, you can choose to do only an upload or only a download.
To perform upload-only synchronization, use the -uo dbmlsync option or the UploadOnly (uo) extended option.
To perform download-only synchronization, use the -ds dbmlsync option or the DownloadOnly (ds) extended option.
SQL Anywhere remote databases can also use download-only publications. This approach to downloads is different from download-only synchronizations.
To perform upload-only synchronization, use the Upload Only synchronization parameter.
To perform download-only synchronization, use the Download Only synchronization parameter.