Answer

IBM i QTEMP Library:

Every job on the IBM i system has a unique QTEMP library available for use within that job. This library is used by both user applications and the operating system to create and manage temporary objects.

Characteristics of QTEMP:

QTEMP libraries have the following characteristics:

• Each job has its own unique QTEMP library.
• Objects created in QTEMP are deleted automatically when the job ends.
• QTEMP libraries are created as permanent system objects to survive abnormal IPLs.
• During IPL, the system deletes any remaining objects in QTEMP to prevent orphaned objects.
• If QTEMP were temporary, objects could become orphaned and require recovery using RCLSTG.

Security Aspects:

From a security standpoint, QTEMP libraries are designed to be isolated and secure:

• QTEMP libraries have special attributes that prevent them from being accessed by other jobs.
• User-written programs cannot locate or access another job's QTEMP library.

Object Attributes in QTEMP:

Objects created in QTEMP have the same attributes as those created in other libraries such as QGPL:

• External objects types like *FILE, *PGM, *DTAARA are created as permanent.
• This ensures they can be moved from QTEMP to another library if needed.

Auditing Considerations:

• Certain auditing functions may not log activity for objects created in QTEMP. This is due to the temporary and job-specific nature of the library, which limits the scope of auditing.
  • The following actions on objects in the QTEMP library will NOT be audited when the value *NOQTEMP is specified on the QAUDCTL system value.
    •  Changing or reading objects in QTEMP (journal entry types ZC, ZR).
    • Changing the authority, owner, or primary group of objects in QTEMP (journal entry types CA, OW, PG).

Note: The create of objects into QTEMP library and the delete of objects from QTEMP library are never audited.

Additional Notes

• QTEMP is essential for temporary data processing and job-specific operations.
• Proper understanding of QTEMP behavior is important for system recovery and security planning.