# Persistent Buffer Management with Optimistic Consistency

## TL;DR

This paper proposes a novel persistent buffer management approach that leverages non-volatile memory as both memory and storage, enabling efficient direct access and recovery in modern database systems.

## Contribution

It introduces a persistent buffer pool design that uses NVM as both memory and storage, improving integration, cost, and recovery speed.

## Key findings

- Enables direct CPU access to NVM pages like memory.
- Allows recovery of corrupted pages post-failure.
- Reduces costs by replacing DRAM with NVM.

## Abstract

Finding the best way to leverage non-volatile memory (NVM) on modern database systems is still an open problem. The answer is far from trivial since the clear boundary between memory and storage present in most systems seems to be incompatible with the intrinsic memory-storage duality of NVM. Rather than treating NVM either solely as memory or solely as storage, in this work we propose how NVM can be simultaneously used as both in the context of modern database systems. We design a persistent buffer pool on NVM, enabling pages to be directly read/written by the CPU (like memory) while recovering corrupted pages after a failure (like storage). The main benefits of our approach are an easy integration in the existing database architectures, reduced costs (by replacing DRAM with NVM), and faster peak-performance recovery.