公开(公告)号：US20130110771A1

公开(公告)日：2013-05-02

申请号：US13666266

申请日：2012-11-01

Applicant: Dwight Merriman ,  Eliot Horowitz ,  Mathias Stearn

Inventor： Dwight Merriman ,  Eliot Horowitz ,  Mathias Stearn

IPC: G06F7/00 ,  G06F17/30

CPC classification number: G06F17/30174 ,  G06F11/1471 ,  G06F12/02 ,  G06F17/30368 ,  G06F2212/163 ,  G06F2212/206

Abstract: A durable memory-mapped database system includes a first memory-mapped view of a database, a second memory-mapped view of the database, a journal buffer and a journal. The first memory-mapped view of the database is a protected view and includes copies of a plurality of datafiles from the database. The second memory-mapped view of the database is a write view and includes copies of the plurality of datafiles. The journal buffer is a buffer in random access memory configured to record datafile updates. The journal is configured to periodically receive recorded datafile updates from the journal buffer.