[Faculty] Fwd: [CSRC.COLLOQUIUM] "A File System Bypassing Volatile Main Memory: Towards A Single-Level Persistent Store"

[Jose Castillo]

<https://lh3.googleusercontent.com/-ZPFNPh16sR0/Wt39FrXUP-I/AAAAAAAAAaw/3wQunGe20lUopmV_ggfPaDwE9cVAgVzxgCLcBGAs/s1600/image001.jpg>

DATE:  *Friday, September 7, 2018*




TITLE:


*A **File System Bypassing Volatile Main Memory: Towards A Single-Level
Persistent Store*




TIME:  *3:30PM*



LOCATION:  *GMCS 314*



SPEAKER/BIO:


*Tao Xie, Professor, Department of Computer Science, SDSU*





ABSTRACT:

Existing persistent memory (PM) based file systems rely on a DRAM and PM
hybrid store. Although a hybrid store does boost system performance while
avoiding some current PM limitations like limited endurance, we envision
that with more advances PM technologies could provide applications with a
single-level persistent store in the not-so-distant future. As a first step
to explore this direction, in this paper we design, implement, and evaluate
a new persistent memory file system called SPFS (Single-level Persistent
File System), which completely bypasses conventional DRAM-based volatile
main memory. Unlike all existing PM-based file systems, SPFS never
leverages DRAM to manage its metadata. Thus, redundant copies of metadata
in volatile main memory and data movements between the two memories can be
totally eliminated. The goal of this paper is to explore how to manage
files and their metadata with guaranteed data consistency on PM without the
support of DRAM, which makes a first step towards the ultimate success of a
single-level persistent store. Experimental results demonstrate that SPFS
outperforms traditional DRAM-based in-memory file systems ramfs and tmpfs
in most cases. Besides, its performance is only moderately worse than that
of NOVA, a state-of-the-art PM-based file system.
  HOST:  Wei Wang
Aug 27

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