Set number of blocks to add




VSupported on OpenVMS



The number of blocks to add. (n)


The DEQ qualifier specifies the number of blocks to add when a file is automatically extended. Automatic extension occurs whenever a program performs a WRITE, WRITES, or STORE, and the space that is currently allocated is exhausted.

In some cases, DEQ reduces overhead by reducing the number of times a file must be extended. In other cases, DEQ makes it possible to extend a file when available space is less than the system default extend quantity.

When creating a new file, the DEQ qualifier becomes the permanent default for the file. When opening an existing file, you can use DEQ to override the file’s default during the time the file is open.

See also