Components of the Informix Dynamic Server
Informix Dynamic Server is composed of three separate components: the process component, the shared memory component, and the disk component. The disk component is almost identical to that of OnLine. There are some differences in the shared memory component, mainly due to structures that are put into place to handle parallelism. The major differences between the earlier version and the latest version lie in the process component, which was drastically redesigned.
OnLine Version 5.X is a two-process architecture, in which a client process communicates with a sqlturbo process that did the processing work in a linear, single-threaded manner. Each client process in OnLine had a corresponding ...