Replication Server supports the Adaptive Server data compression feature.
With Adaptive Server version 15.7, you can use data compression, which lets you use less storage space for the same amount of data, reduce cache memory consumption, and improve performance because of lower I/O demands. Adaptive Server can compress regular data and large object (LOB) datatypes such as text, image, and unitext. See the Adaptive Server Enterprise Compression Users Guide.
Adaptive Server stores data in-row or off-row. Adaptive Server stores in-row data in a location that is physically contiguous to the row metadata. Adaptive Server stores LOB data off-row in other locations because of the size of the data. There is a pointer in-row to the actual location of off-row data.
Replication Server does not perform any decompression and replicates the compressed LOB columns from the primary Adaptive Server database, in compressed format, and without decompressing the text values. See Replication Server Administration Guide Volume 1 > Manage RepAgent and Support Adaptive Server > Adaptive Server Data Compression for support for compressed data replication between Adaptive Server databases.