Systems, methods, and computer readable media for performance optimization of storage allocation to virtual logical units

A method for performance optimization of storage allocation to virtual logical units, 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 I/O write request to store data into the storage entity, and, in response to receiving the I/O write request, performing an allocation process, the allocation process comprising:
• accessing in-memory statistics regarding the allocation of slices to logical units, the in-memory statistics being stored in a memory that is different from the data storage space and different from a slice allocation table for non-volatilely storing slice allocation status;
• selecting, from the plurality of slices and based on the in-memory statistics, a slice to be allocated;
• allocating the selected slice to a logical unit;
• updating the in-memory statistics to reflect the allocation of the selected slice;
• updating the slice allocation table to indicate that the post-I/O management process for the selected slice is pending;
• processing the I/O write request;
• and
• scheduling a post-I/O management process for the selected slice to be performed asynchronously from allocation processes.

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

• receiving an I/O write request to store data into the storage entity having data storage space for storing data, the data storage space being divided into a plurality of slices, and, in response to receiving the I/O write request, performing an allocation process, the allocation process comprising:
• accessing in-memory statistics regarding the allocation of slices to logical units, the in-memory statistics being stored in a memory that is different from the data storage space and different from a slice allocation table for non-volatilely storing slice allocation status;
• selecting, from the plurality of slices and based on the in-memory statistics, a slice to be allocated;
• allocating the selected slice to a logical unit;
• updating the in-memory statistics to reflect the allocation of the selected slice;
• updating the slice allocation table to indicate that the post-I/O management process for the selected slice is pending;
• processing the I/O write request;
• and
• scheduling a post-I/O management process for the selected slice to be performed asynchronously from allocation processes.