compression= { zlib | none }

• TCPIP, TLS, HTTP, HTTPS

For UltraLite, compression is off by default.

For dbmlsync, zlib compression is used by default.

When you use zlib compression, you can configure the upload and download compression using the zlib_download_window_size option and zlib_upload_window_size option. Using these options, you can also turn off compression for either the upload or the download.

To use zlib compression in UltraLite, mlczlib12.dll must be deployed and for C++ only, applications must call ULEnableZlibSyncCompression( sqlca ).

• zlib_download_window_size
• zlib_upload_window_size

The following option sets compression for upload only, and sets the upload window size to 9:

"compression=zlib;zlib_download_window_size=0;zlib_upload_window_size=9"