Method and apparatus for ensuring data consistency

A storage system for ensuring data consistency, comprising:

• a first processing unit (processor) coupled to memory of the first processor;
• a second processor coupled to memory of the second processor;
• and
• persistent data storage shared between the first and second processors;
• wherein the first processor is configured to:
• write data into a temporary buffer in the memory of the first processor;
• in response to the data being written into the temporary buffer, send the data to the second processor to update a copy of the data in the memory of the second processor;
• and
• in response to receiving an indication that the second processor has received the data, copy the data from the temporary buffer to a working buffer in the memory of the first processor.

A computer program product for ensuring data consistency, comprising a non-transitory computer-readable storage medium storing instructions, which, when executed by a first processing unit (processor) of a storage system, cause the storage system to:

• write data into a temporary buffer in memory of the first processor;
• in response to the data being written into the temporary buffer, send the data to a second processor of the storage system to update a copy of the data in memory of the second processor;
• and
• in response to receiving an indication that the second processor has received the data, copy the data from the temporary buffer to a working buffer in the memory of the first processor.