Method and apparatus for reconstructing and checking the consistency of deduplication metadata of a deduplication file system

A deduplication computing system comprising:

• a non-volatile memory to store a deduplication file system;
• a volatile memory to store deduplication metadata associated with the deduplication file system;
• and
• a processor coupled with the non-volatile memory and the volatile memory to
• mount the deduplication file system of a deduplication computing system after an unclean shutdown of the deduplication computing system,
• initiate a reconstruction and consistency check of deduplication metadata associated with the deduplication file system,
• receive a user operation prior to completion of the reconstruction and consistency check of the deduplication metadata, and
• process the user operation in parallel with the reconstruction and consistency check of the deduplication metadata.

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:

• mounting a deduplication file system of a deduplication computing system after an unclean shutdown of the deduplication computing system;
• initiating a reconstruction and consistency check of deduplication metadata associated with the deduplication file system;
• receiving a user operation prior to completion of the reconstruction and consistency check of the deduplication metadata;
• and
• processing the user operation in parallel with the reconstruction and consistency check of the deduplication metadata.