公开(公告)号：US20180246809A1

公开(公告)日：2018-08-30

申请号：US15695621

申请日：2017-09-05

Applicant: SAP SE

Inventor： Oliver Rebholz ,  Ivan Schreter ,  Abdelkader Sellami ,  Daniel Booss ,  Gunter Radestock ,  Peter Bumbulis ,  Alexander Boehm ,  Frank Renkes ,  Werner Thesing ,  Thomas Willhalm

IPC: G06F12/02 ,  G06F17/30 ,  G11C11/56

Abstract: A system includes a non-volatile random access memory storing a column store main fragment of a column of a database table, and a processing unit to read the column store main fragment from the non-volatile random access memory. A volatile random access memory storing a column store delta fragment of the column of the database table may also be included, in which the processing unit is to write to the column store delta fragment. According to some systems, the stored column store main fragment is byte-addressable, and is copied from the volatile random access memory to the non-volatile random access memory without using a filesystem cache.

公开(公告)号：US10824673B2

公开(公告)日：2020-11-03

申请号：US15695621

申请日：2017-09-05

Applicant: SAP SE

Inventor： Oliver Rebholz ,  Ivan Schreter ,  Abdelkader Sellami ,  Daniel Booss ,  Gunter Radestock ,  Peter Bumbulis ,  Alexander Boehm ,  Frank Renkes ,  Werner Thesing ,  Thomas Willhalm

IPC: G06F16/901 ,  G06F3/06

Abstract: A system includes a non-volatile random access memory storing a column store main fragment of a column of a database table, and a processing unit to read the column store main fragment from the non-volatile random access memory. A volatile random access memory storing a column store delta fragment of the column of the database table may also be included, in which the processing unit is to write to the column store delta fragment. According to some systems, the stored column store main fragment is byte-addressable, and is copied from the volatile random access memory to the non-volatile random access memory without using a filesystem cache.