Consistency group restoration from a secondary site

A computer readable medium, embodied in a non-transitory computer readable medium, the non-transitory computer readable medium having stored thereon a sequence of instructions which, when stored in memory and executed by one or more processors causes the one or more processors to perform a set of acts for constructing a snapshot to restore a group of computing entities, the set of acts comprising:

• receiving a stream of I/O operations at a secondary computing site from a primary computing site, the stream of I/O operations comprising copies of I/O operations that were performed over any of the computing entities of the group;
• periodically updating an I/O map that associates a time indication to the copies of I/O operations, the time indication referring to when corresponding ones of the I/O operations were performed over the computing entities of the group;
• receiving a recovery request at the secondary computing site;
• and
• replaying at least some of the I/O operations of the stream by referring to the I/O map to identify sets of the copies of the I/O operations and performing the sets of the copies of the I/O operations in an order of receipt into the stream.

A system for constructing a snapshot to restore a group of computing entities, the system comprising:

• a storage medium having stored thereon a sequence of instructions;
• and
• one or more processors that execute the instructions to cause the one or more processors to perform a set of acts, the set of acts comprising,
• receiving a stream of I/O operations at a secondary computing site from a primary computing site, the stream of I/O operations comprising copies of I/O operations that were performed over any of the computing entities of the group;
• periodically updating an I/O map that associates a time indication to the copies of I/O operations, the time indication referring to when corresponding ones of the I/O operations were performed over the computing entities of the group;
• receiving a recovery request at the secondary computing site;
• and
• replaying at least some of the I/O operations of the stream by referring to the I/O map to identify sets of the copies of the I/O operations and performing the sets of the copies of the I/O operations in an order of receipt into the stream.