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(Continued from previous question...)
What is PSB, PCB and ACB
PSB (Program specification block): Informs about how a specific program is to be access one or more IMS DB. It consists PCB.
PCB (Program Communication Block): Information to which segment in DB can be accessed, what the program is allowed to do with those segment and how the DB is to be accessed.
ACB (Access Control Block ): are generated by IMS as an expansion of information contained in the PSB in order to speed up the access to the applicable DBD's.
What is check pointing, sync point? How do you write a PSB code?
