Enhanced soft fence of devices
A method, computer system, and a computer program product for soft fencing is provided. The present invention may include identifying a logical device swap occurred. The present invention may also include, in response to a logical device swap, creating a soft fence command. The present invention may then include issuing the created soft fence command.
1. A method for soft fencing, the method comprising:
issuing a query host access to volume command;
in response to the query host access to volume command, processing an input-output services (IOS) record in a storage system control data set (CDS);
creating a list of path group identifiers (PGIDs);
identifying the created list of PGIDs associated with a production sysplex;
associating the identified list of PGIDs with the production sysplex;
identifying a plurality of sysplex names not associated with the production sysplex;
identifying a logical device swap occurred;
in response to the logical device swap, creating a soft fence command; and
issuing the created soft fence command.
2. The method of claim 1 , wherein the soft fence command includes a logical subsystem (LSS) command, a device bitmap and an action field.
3. The method of claim 1 , further comprising:
identifying a plurality of logical device swaps occurred;
in response to the plurality of logical device swaps, creating a soft fence command for each logical device swap; and
issuing the new created soft fence commands.
4. The method of claim 1 , wherein the soft fence command is a read fence, a write fence or a read and write fence.
5. The method of claim 1 , wherein the list of PGIDs specifies which system is a read fenced system, a write fenced system or a read fenced and write fenced system.
6. The method of claim 2 , wherein the action field includes a type of the soft fence command issued.
7. A computer system for soft fencing, comprising:
one or more processors, one or more computer-readable memories, one or more computer-readable tangible storage media, and program instructions stored on at least one of the one or more computer-readable tangible storage media for execution by at least one of the one or more processors via at least one of the one or more computer-readable memories, wherein the computer system is capable of performing a method comprising:
issuing a query host access to volume command;
in response to the query host access to volume command, processing an input-output services (IOS) record in a storage system control data set (CDS);
creating a list of path group identifiers (PGIDs);
identifying the created list of PGIDs associated with a production sysplex;
associating the identified list of PGIDs with the production sysplex;
identifying a plurality of sysplex names not associated with the production sysplex;
identifying a logical device swap occurred;
in response to the logical device swap, creating a soft fence command; and
issuing the created soft fence command.
8. The computer system of claim 7 , wherein the soft fence command includes a logical subsystem (LSS) command, a device bitmap and an action field.
9. The computer system of claim 7 , further comprising:
identifying a plurality of logical device swaps occurred;
in response to the plurality of logical device swaps, creating a soft fence command for each logical device swap; and
issuing the new created soft fence commands.
10. The computer system of claim 7 , wherein the soft fence command is a read fence, a write fence or a read and write fence.
11. The computer system of claim 7 , wherein the list of PGIDs specifies which system is a read fenced system, a write fenced system or a read fenced and write fenced system.
12. The computer system of claim 8 , wherein the action field includes a type of the soft fence command issued.
13. A computer program product for soft fencing, comprising:
one or more computer-readable tangible storage media and program instructions stored on at least one of the one or more computer-readable tangible storage media, the program instructions executable by a processor to cause the processor to perform a method comprising:
issuing a query host access to volume command;
in response to the query host access to volume command, processing an input-output services (IOS) record in a storage system control data set (CDS);
creating a list of path group identifiers (PGIDs);
identifying the created list of PGIDs associated with a production sysplex;
associating the identified list of PGIDs with the production sysplex;
identifying a plurality of sysplex names not associated with the production sysplex;
identifying a logical device swap occurred;
in response to the logical device swap, creating a soft fence command; and
issuing the created soft fence command.
14. The computer program product of claim 13 , wherein the soft fence command includes a logical subsystem (LSS) command, a device bitmap and an action field.
15. The computer program product of claim 13 , further comprising:
identifying a plurality of logical device swaps occurred;
in response to the plurality of logical device swaps, creating a soft fence command for each logical device swap; and
issuing the new created soft fence commands.
16. The computer program product of claim 13 , wherein the soft fence command is a read fence, a write fence or a read and write fence.
17. The computer program product of claim 13 , wherein the list of PGIDs specifies which system is a read fenced system, a write fenced system or a read fenced and write fenced system.