Turboimage Database Enhancements - August 2001

Fork() Characteristics:
•Forked process inherits characters
from its parent
•Forked process has its own SR5
•Duplicate some file system data
structures and share some
•Runtime Control Block (DBUX/DBU)
- Not able to duplicate file system data structure of
DBUX and DBU
- Many fields not suitable for sharing
- State of the process while forking
•Global Variables
- qlock_trace
- bti_global
- ccu_global
- chunk_control
•Open Files
- except rootfile, not using file system intrinsics
- maintain own current record pointers
- use SMCB
Problems for forking:
•fork() will fail if DB opened
•Runtime control block
•Global variables
•Open files