Deduplicated host cache flush to remote storage

A non-transitory machine-readable medium comprising instructions, which when executed by a machine, causes the machine to:

• aggregate a set of data units, unique among data units of writes cached by a host in a cache, into a change set file;
• generate commands for the cached writes based on mappings between targets of the cached writes and locations of data units in the change set file;
• and
• communicate the change set file and the commands to a storage system, wherein a metadata update operation to modify metadata of a file targeted by a command to increase a size of the file is transmitted to the storage system, and wherein transmission of the command to the storage system is dependent upon the metadata update operation completing.

A computing device comprising:

• a memory comprising machine executable code for performing a method;
• and
• a processor coupled to the memory, the processor configured to execute the machine executable code to cause the processor to:
• aggregate a set of data units, unique among data units of writes cached by a host in a cache, into a change set file;
• generate commands for the cached writes based on mappings between targets of the cached writes and locations of data units in the change set file;
• and
• communicate the change set file and the commands to a storage system, wherein a metadata update operation to modify metadata of a file targeted by a command to increase a size of the file is transmitted to the storage system, and wherein transmission of the command to the storage system is dependent upon the metadata update operation completing.