compression= { zlib | none }

• TCPIP, TLS, HTTP, HTTPS

For UltraLite, no compression is used 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.

When linking your application directly against the static UltraLite runtime, call ULEnableZlibSyncCompression( sqlca ) to link the zlib functionality directly into your application. Otherwise, mlczlib12.dll must be deployed.

For information about how to set network protocol options with dbmlsync, see CommunicationAddress (adr) extended option.

For information about how to set network protocol options with UltraLite, see UltraLite network protocol options.

• 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"