Processing a space release command to free release space in a consistency group

A system for processing a space release command when mirroring data at a source storage to a target storage, comprising:

• a processor;
• and
• a computer readable storage medium having program instructions embodied therewith, the program instructions executable by the processor to cause operations, the operations comprising:
• receiving a space release command to free a release space in the source storage while transferring changed data in a consistency group;
• determining whether a transfer time to complete transfer of remaining consistency group data in the consistency group exceeds a response time to process a space release command;
• determining from priorities assigned the response time and a recovery point objective time whether to complete the transfer of the remaining consistency group data in response to determining that the transfer time exceeds the response time;
• transferring the remaining consistency group data in the release space to the target storage in response to determining from the priorities to complete the transfer of the remaining consistency group data;
• and
• cancelling transfer of the remaining consistency group data in progress in response to determining from the priorities to not complete the transfer of the remaining consistency group data.

A method for processing a space release command in a computing system when mirroring data at a source storage to a target storage, comprising:

• receiving a space release command to free a release space in the source storage while transferring changed data in a consistency group;
• determining whether a transfer time to complete transfer of remaining consistency group data in the consistency group exceeds a response time to process a space release command;
• determining from priorities assigned the response time and a recovery point objective time whether to complete the transfer of the remaining consistency group data in response to determining that the transfer time exceeds the response time;
• transferring the remaining consistency group data in the release space to the target storage in response to determining from the priorities to complete the transfer of the remaining consistency group data;
• and
• cancelling transfer of the remaining consistency group data in progress in response to determining from the priorities to not complete the transfer of the remaining consistency group data.