Working with database files
This topic describes the various tasks that can be used to ensure that files are used effectively.
- What resources the system has allocated for each file type.
- How to move data between different files such as device and database.
- The options that exist when an application is used for accessing a file.
- The levels of support that exist for shared files.
- The process of changing file attributes such as file name, device name or remote location name.
- File resources allocation
Resources are those parts of the system that are required by a job or task, including main storage, devices, the processing unit, programs, files, libraries, and folders. When you write a high-level language program, you should be aware of what resources the system has allocated for each file type.
- Copying files
With the copy function on the i5/OS operating system, you can copy physical and logical files, copy members and records, copy complex objects, and copy files between systems.
- Opened files
When you want an application to use a file, you do so by referring to that file by name. The file description for that file then controls how the program and the system interact.
- Shared files
File management on the i5/OS operating system provides several levels of support for shared files. Files can be shared among many users, many jobs, or many programs within the same job.
- Overrides
You can use overrides to temporarily change a file name, a device name associated with the file, or some of the other attributes of a file.
Parent topic:
Database file management