Copying data from multiple point-in-time copies to a log storage to use to roll-back a source storage

A system for managing point-in-time copies of a source storage, comprising:

• processor;
• and
• a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a processor to cause operations, the operations comprising:
• establishing a plurality of point-in-time copies of a source storage at different point-in-times;
• in response to receiving writes to the source storage after establishing each of the point-in-time copies, copying point-in-time data in the source storage, before being updated by the received writes, to a log storage, wherein the log storage stores point-in-time data for multiple of the point-in-time copies;
• for each of the established point-in-time copies, including in recovery metadata an entry including a first location and a last location in the log storage having point-in-time data for the point-in-time copy;
• and
• copying the point-in-time data to the source storage from the first location through the last location in the log storage indicated in the entry in the recovery metadata for each point-in-time copy to roll-back the source storage to a selected point-in-time of one of the point-in-time copies.

A method for managing point-in-time copies of a source storage, comprising:

• establishing a plurality of point-in-time copies of a source storage at different point-in-times;
• in response to receiving writes to the source storage after establishing each of the point-in-time copies, copying point-in-time data in the source storage, before being updated by the received writes, to a log storage, wherein the log storage stores point-in-time data for multiple of the point-in-time copies;
• for each of the established point-in-time copies, including in recovery metadata an entry including a first location and a last location in the log storage having point-in-time data for the point-in-time copy;
• and
• copying the point-in-time data to the source storage from the first location through the last location in the log storage indicated in the entry in the recovery metadata for each point-in-time copy to roll-back the source storage to a selected point-in-time of one of the point-in-time copies.