Memory image capture

A non-transitory computer-readable medium storing instructions, execution of which in a computer system, causes the computer system to perform operations including:

• enabling an application to use memory to store and access in-memory data during execution of an application process, wherein the application is a replica application instance executing an asynchronous replica application process of a primary application process executed by a primary application instance and the replica application instance executes the asynchronous application process by:
• accessing records from a full log associated with the primary application instance;
• and
• performing transactions indicated in the full log associated with the primary application instance;
• maintaining a record of mappings between an address space of the application and an address space of the memory during execution of the application process;
• at a particular time during execution of the application process, causing execution of the application process to freeze to a frozen process state;
• and
• after causing execution of the application process to freeze to the frozen process state;
• write protecting the in-memory data as it exists at the frozen process state;
• generating, based on the record of the mappings, metadata indicative of a state of the mappings at the frozen process state;
• and
• generating a capture file object based on the metadata.

A system comprising:

• a memory configured for use by an application to store and access in-memory data during execution of an application process;
• and
• a processor configured to:
• maintain a record of mappings between an address space of the application and an address space of the memory during execution of the application process, wherein the application is a replica application instance executing an asynchronous replica application process of a primary application process executed by a primary application instance and the replica application instance executes the asynchronous application process by:
• accessing records from a full log associated with the primary application instance;
• and
• performing transactions indicated in the full log associated with the primary application instance;
• at a particular time during execution of the application process, cause execution of the application process to freeze to a frozen process state;
• and
• after causing execution of the application process to freeze to the frozen process state:
• write protect the in-memory data as it exists at the frozen process state;
• generate, based on the record of the mappings, metadata indicative of a state of the mappings at the frozen process state;
• and
• generate a capture file object based on the metadata.