Dynamic rewrite of files within deduplication system

A system for rewriting data in a deduplication storage environment, comprising:

• a processor;
• a memory including instructions that when executed by the processor cause the processor to perform:
• partitioning an original deduplication file system (DFS) file into a first set of sections being sections including data affected by rewrite operations and a second set of sections being sections including data unaffected by rewrite operations;
• creating a new DFS file to be stored as part of a plurality of user files, the plurality of user files including the original DFS file and being accessible by a sequential deduplication file system and a dynamic non-deduplicated file system, the dynamic non-deduplicated file system including a plurality of dynamic metadata files having entries pointing to corresponding sections of the original DFS files;
• directly writing the first set of sections of the original DFS file including data affected by rewrite operations into the new DFS file;
• quoting the second set of sections from the original DFS file including data unaffected by rewrite operations into the new DFS file;
• and
• deleting the original DFS file.

A computer program product for rewriting data in a deduplication storage environment by a processor device, the computer program product comprising a non-transitory computer-readable storage medium having computer-readable program code portions stored therein comprising:

• a first executable portion for partitioning an original deduplication file system (DFS) file into a first set of sections being sections including data affected by rewrite operations and a second set of sections being sections including data unaffected by rewrite operations;
• a second executable portion for creating a new DFS file to be stored as part of a plurality of user files, the plurality of user files including the original DFS file and being accessible by a sequential deduplication file system and a dynamic non-deduplicated file system, the dynamic non-deduplicated file system including a plurality of dynamic metadata files having entries pointing to corresponding sections of the original DFS files;
• a third executable portion for directly writing the first set of sections of the original DFS file including data affected by rewrite operations into the new DFS file;
• a fourth executable portion for quoting the second set of sections from the original DFS file including data unaffected by rewrite operations into the new DFS file;
• and
• a fifth executable portion for deleting the original DFS file.