Author: Nikhilesh Tomar
Subject: ENQMODEL - ENQ SYSPLEX WIDE
Posted: Tue Nov 29, 2016 4:12 am (GMT 5.5)
Hi All,
I have used ENQ and DEQ commands in an CICS environment and I can understand the concept from the below definitions, how the ENQ/DEQ command works
"The resource to be enqueued on must be identified by one of the following methods:
Specifying a data area that is the resource. It is the location (address) of the data area in storage that matters, not its contents.
Specifying a data area that contains a unique argument (for example, an employee name) that represents the resource. It is the contents of the data value that matters, not its location. LENGTH is required; the presence of the LENGTH option tells CICS to enqueue on the contents of the data value."
but I am trying to achieve an ENQ/DEQ sysplex-wide or we can say I am trying to achieve serialized access on the same resource from different CICS environments. From below information I can understand that there is a concept of ENQMODEL for the same![icon_smile.gif]()
However I am not able to find any example for the same.
Below information I gathered while searching:-
When an EXEC CICS ENQ (or DEQ) command is issued for a resource whose name matches that of an installed ENQMODEL resource definition, CICS checks the value of the ENQSCOPE attribute to determine whether the scope is local or sysplex-wide. If the ENQSCOPE attribute is left blank (the default value), CICS treats the ENQ as local to the issuing CICS region. If no ENQMODEL matches the resource name, the scope of the ENQ command is local. See the CICS Resource Definition Guide for more information about the ENQMODEL resource definition.
Also can you please help me understand the above concept.
1 "When an EXEC CICS ENQ (or DEQ) command is issued for a resource whose name matches that of an installed ENQMODEL resource definition"
Does this mean that the resource name was pre-supplied while installing the ENQMODEL ? and before that I am confused on what installed ENQMODEL stands here for ?
2. ENQSCOPE is by default left black and provided some value (which I am assuming as of any name for example A) which can be provided while issuing an enque command. Please correct me as I am not sure on this.
3. I also read on the concept of GRS but I am not clear on the same as well.
Thankyou all!!
_________________
Regards,
Nick
Subject: ENQMODEL - ENQ SYSPLEX WIDE
Posted: Tue Nov 29, 2016 4:12 am (GMT 5.5)
Hi All,
I have used ENQ and DEQ commands in an CICS environment and I can understand the concept from the below definitions, how the ENQ/DEQ command works
"The resource to be enqueued on must be identified by one of the following methods:
Specifying a data area that is the resource. It is the location (address) of the data area in storage that matters, not its contents.
Specifying a data area that contains a unique argument (for example, an employee name) that represents the resource. It is the contents of the data value that matters, not its location. LENGTH is required; the presence of the LENGTH option tells CICS to enqueue on the contents of the data value."
but I am trying to achieve an ENQ/DEQ sysplex-wide or we can say I am trying to achieve serialized access on the same resource from different CICS environments. From below information I can understand that there is a concept of ENQMODEL for the same
However I am not able to find any example for the same.
Below information I gathered while searching:-
When an EXEC CICS ENQ (or DEQ) command is issued for a resource whose name matches that of an installed ENQMODEL resource definition, CICS checks the value of the ENQSCOPE attribute to determine whether the scope is local or sysplex-wide. If the ENQSCOPE attribute is left blank (the default value), CICS treats the ENQ as local to the issuing CICS region. If no ENQMODEL matches the resource name, the scope of the ENQ command is local. See the CICS Resource Definition Guide for more information about the ENQMODEL resource definition.
Also can you please help me understand the above concept.
1 "When an EXEC CICS ENQ (or DEQ) command is issued for a resource whose name matches that of an installed ENQMODEL resource definition"
Does this mean that the resource name was pre-supplied while installing the ENQMODEL ? and before that I am confused on what installed ENQMODEL stands here for ?
2. ENQSCOPE is by default left black and provided some value (which I am assuming as of any name for example A) which can be provided while issuing an enque command. Please correct me as I am not sure on this.
3. I also read on the concept of GRS but I am not clear on the same as well.
Thankyou all!!
_________________
Regards,
Nick