公开(公告)号：US11182077B1

公开(公告)日：2021-11-23

申请号：US16150381

申请日：2018-10-03

Applicant: AmZetta Technologies, LLC

Inventor： Paresh Chatterjee ,  Srikumar Subramanian ,  Narayanaswami Ganapathy ,  Senthilkumar Ramasamy

IPC: G06F12/00 ,  G06F13/00 ,  G06F3/06 ,  G06F12/0862

Abstract: A method for determining when to load read I/O operations into an SSD cache medium for a physical storage medium of a data storage system can include maintaining an SSD filter bitmap with a plurality of bits, where each of the bits corresponds to a respective data block of the physical storage medium. The method can also include initially setting each of the bits to a first predetermined value, receiving a first read I/O operation directed to a particular data block of the physical storage medium and, in response to receiving the first read I/O operation, setting a bit corresponding to the particular data block to a second predetermined value. The method can further include receiving a second read I/O operation directed to the particular data block and, in response to receiving the second I/O operation, loading data for the particular data block into the SSD cache medium.