Check out the new USENIX Web site.
USENIX, The Advanced Computing Systems Association

FAST '08 – Abstract

Pp. 67–80 of the Proceedings

AWOL: An Adaptive Write Optimizations Layer

Alexandros Batsakis and Randal Burns, Johns Hopkins University; Arkady Kanevsky, James Lentini, and Thomas Talpey, Network Appliance™ Inc.

Abstract

Operating system memory managers fail to consider the population of read versus write pages in the buffer pool or outstanding I/O requests when writing dirty pages to disk or network file systems. This leads to bursty I/O patterns, which stall processes reading data and reduce the efficiency of storage. We address these limitations by adaptively allocating memory between write buffering and read caching and by writing dirty pages to disk opportunistically before the operating system submits them for write-back. We implement and evaluate our methods within the Linux operating system and show performance gains of more than 30% for mixed read/write workloads.
  • View the full text of this paper in HTML and PDF. Listen to the presentation in MP3 format.
    The Proceedings are published as a collective work, © 2008 by the USENIX Association. All Rights Reserved. Rights to individual papers remain with the author or the author's employer. Permission is granted for the noncommercial reproduction of the complete work for educational or research purposes. USENIX acknowledges all trademarks within this paper.
To become a USENIX member, please see our Membership Information.

Last changed: 7 May 2008 mn