The ipload utility is the interface that allows you to prepare the parameters that the onpload utility uses. The onpload utility, which is a client application that attaches to the database server, actually loads and unloads the data.
The onpload utility can take advantage of parallel processing to perform both I/O and data conversion as efficiently as possible because it uses the same multithreading architecture that the database server uses.
Multithreading is described in the IBM Informix: Dynamic Server Administrator's Guide. The following sections describe how onpload uses multithreading for deluxe loads, express loads, and unloads.
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