公开(公告)号：US11360678B1

公开(公告)日：2022-06-14

申请号：US17179977

申请日：2021-02-19

Applicant: VMware, Inc.

Inventor： Long Yang ,  Wenguang Wang ,  Pranay Singh ,  Abhay Kumar Jain

IPC: G06F3/06

Abstract: In one set of embodiments, a computer system can periodically run an unmap service configured to scan a subset of bitmaps maintained by a file system of the computer system. As part of scanning each bitmap in the subset, the unmap service can, for each bit in the bitmap: (1) check whether the bit indicates that a corresponding physical block address (PBA) on the storage backend is currently free; (2) upon determining that the bit indicates the PBA is currently free, identify an extent within the bitmap where the PBA resides; (3) check whether an unmap indicator associated with the extent indicates that at least one free PBA in the extent is not currently unmapped in the storage backend; and (4) upon determining that the unmap indicator indicates at least one free PBA in the extent is not currently unmapped in the storage backend, add the PBA to a list of PBAs to be unmapped.

公开(公告)号：US11803469B2

公开(公告)日：2023-10-31

申请号：US17410673

申请日：2021-08-24

Applicant: VMware, Inc.

Inventor： Wenguang Wang ,  Long Yang ,  Maxime Austruy ,  Matthew B. Amdur ,  Eric Knauft

IPC: G06F12/0804 ,  G06F12/1009 ,  G06F16/22

CPC classification number: G06F12/0804 ,  G06F12/1009 ,  G06F16/2246 ,  G06F2212/1032

Abstract: The disclosure herein describes storing data using a capacity data storage tier and a smaller performance data storage tier. The capacity data storage tier includes capacity data storage hardware configured to store log-structured leaf pages (LLPs), and the performance data storage tier includes performance data storage hardware. A virtual address table (VAT) includes a set of virtual address entries referencing the LLPs. A tree-structured index includes index nodes referencing the set of virtual address entries of the VAT. Data to be stored is received, and at least a first portion of metadata associated with the received data is stored in the LLPs using the VAT, and at least a second portion of metadata associated with the received data is stored in the performance data storage tier. The architecture reduces space usage of the performance data storage tier.