公开(公告)号：US20240078179A1

公开(公告)日：2024-03-07

申请号：US17929197

申请日：2022-09-01

Applicant: VMware, Inc.

Inventor： Jiaqi ZUO ,  Junlong Gao ,  Wenguang Wang ,  Eric Knauft ,  Hardik Singh Negi

IPC: G06F12/0804 ,  G06F12/0882

CPC classification number: G06F12/0804 ,  G06F12/0882

Abstract: A method for efficient write-back for journal truncation is provided. A method includes maintaining a journal in a memory of a computing system including a plurality of records. Each record indicates a transaction associated with one or more pages in an ordered data structure and maintaining a dirty list including an entry for each page indicated by a record in the journal. Each entry in the dirty list includes a respective first log sequence number (LSN) associated with a least recent record of the plurality of records that indicates the page and a respective second LSN associated with a most recent record of the plurality of records that indicates the page. The method includes determining to truncate the journal. The method includes identifying one or more records, of the plurality of records, from the journal to write back to a disk, where the identifying is based on the dirty list.