Method and apparatus for maintaining data consistency in an in-place-update file system with data deduplication

An article of manufacture having one or more non-transitory computer readable storage media storing executable instructions thereon which when executed cause a system to perform a method comprising:

• receiving a data write request to write a block of data from a volatile memory to a non-volatile memory in an in-place-update file system of a deduplication computing system;
• determining whether the data write request is to perform an in-place update of an existing block in the non-volatile memory;
• when the data write request is to perform the in-place update of the existing block, converting a type of write operation associated with the request from a requested write operation type to a new data allocation write operation;
• and
• processing the new data allocation write operation to write the block of data from the volatile memory to the non-volatile memory using an ordered sequence of file system data journaling and writes to the non-volatile memory.

A deduplication computing system with an in-place-update file system, the system comprising:

• a volatile memory;
• a non-volatile memory;
• and
• a processor coupled with the volatile memory and non-volatile memory to
• receive a data write request to write a block of data from the volatile memory to the non-volatile memory,
• determine whether the data write request is to perform an in-place update of an existing block in the non-volatile memory,
• when the data write request is to perform the in-place update of the existing block, convert a type of write operation associated with the request from a requested write operation type to a new data allocation write operation, and
• process the new data allocation write operation to write the block of data from the volatile memory to the non-volatile memory using an ordered sequence of file system data journaling and writes to the non-volatile memory.