Systems, methods, and computer readable media for tracking pool storage space reservations

A method for tracking pool storage space reservations, the method comprising:

• at a storage entity having data storage space for storing data, the data storage space being divided into a plurality of slices:
• receiving an allocation or de-allocation request that affects slice reservation statistics, wherein the slice reservation statistics include information for determining an amount of reserved, unallocated slices;
• storing information about the allocation or de-allocation request in a portion of non-volatile memory that stores slice reservation statistics, wherein storing the information in the portion of non-volatile memory is an atomic operation such that partial storage of the information is prevented;
• performing the allocation or de-allocation request;
• and
• updating the slice reservation statistics and clearing the stored information about the allocation or de-allocation request in the portion of non-volatile memory.

A non-transitory computer readable medium having stored thereon executable instructions that when executed by the processor of a computer control the computer to perform steps comprising:

• at a storage entity having data storage space for storing data, the data storage space being divided into a plurality of slices:
• receiving an allocation or de-allocation request that affects slice reservation statistics, wherein the slice reservation statistics include information for determining an amount of reserved, unallocated slices;
• storing information about the allocation or de-allocation request in a portion of non-volatile memory that stores slice reservation statistics, wherein storing the information in the portion of non-volatile memory is an atomic operation such that partial storage of the information is prevented;
• performing the allocation or de-allocation request;
• and
• updating the slice reservation statistics and clearing the stored information about the allocation or de-allocation request in the portion of non-volatile memory.