1. Computers
  2. Display Drivers
  3. Graphics Cards
  4. Memory
  5. Motherboards
  6. Processors
  7. Software
  8. Storage
  9. Operating Systems


Facebook RSS Twitter Twitter Google Plus


Phoronix Test Suite

OpenBenchmarking.org

Linux 3.10 Kernel Integrates BCache HDD/SSD Caching

Linux Kernel

Published on 09 May 2013 01:27 AM EDT
Written by Michael Larabel in Linux Kernel
11 Comments

After being in development for more than one year, BCache was finally merged on Wednesday into the mainline Linux kernel code-base. BCache serves as an SSD caching framework for Linux by offering write-through and write-back caching through a newly-exposed block device.

The block device driver pull was merged Wednesday afternoon. Arguably the most interesting block driver feature to be added to the Linux 3.10 kernel is BCache.

BCache comes down to being a Linux kernel block layer cache where one or more SSDs (or other fast storage devices) can act as a cache for slower rotating disk drives, in somewhat a similar manner to some of the "SSHD" hybrid drives now on the market. BCache is similar to the L2Arc feature exposed on Oracle's ZFS file-system, but with being at the block device level, it's file-system agnostic. BCache is targeting the caching of random reads and writes to the faster storage medium than sequential I/O.

Aside from the supported Linux 3.10 (and later) kernel, there's also user-space "bcache-tools" that are needed for creating the cache and backing devices. When BCache devices are formatted for use, they are then registered with the kernel through a sysfs file.

For more details on BCache itself, read the Linux kernel documentation and the BCache Wiki.

Benchmarks and trial experiences with BCache in the Linux 3.10 kernel when paring HDDs and SSDs will come in a future Phoronix article.

Latest Linux Hardware Reviews
  1. ASUS AM1I-A: A Mini-ITX Board For Socketed Kabini APUs
  2. Mini-Box M350: A Simple, Affordable Mini-ITX Case
  3. Overclocking The AMD AM1 Athlon & Sempron APUs
  4. AMD Athlon 5350 / 5150 & Sempron 3850 / 2650
Latest Linux Articles
  1. Ubuntu 12.04.4 vs. 13.10 vs. 14.04 LTS Desktop Benchmarks
  2. AMD OpenCL Performance With AM1 Kabini APUs
  3. A Quick Look At GCC 4.9 vs. LLVM Clang 3.5
  4. Are AMD Athlon/Sempron APUs Fast Enough For Steam On Linux?
Latest Linux News
  1. FreeBSD Advances For ARM, Bhyve, Clang
  2. Ubuntu 14.04 LTS "Trusty Tahr" Officially Released
  3. Ubuntu 12.04 LTS vs. 14.04 LTS Server Benchmarks
  4. QEMU 2.0 Released With ARM, x86 Enhancements
  5. Running The Unity 8 Preview Session On Ubuntu 14.04 LTS
  6. R600 Gallium3D Disables LLVM Back-End By Default
  7. Fedora 21 Gets GNOME 3.12, PHP 5.6, Mono 3.4
  8. Fedora Workstation Is Making Me Quite Excited
  9. Maynard: A Lightweight Wayland Desktop
  10. Chromium Browser Going Through Growing Pains In Ubuntu 14.04
  11. KDE 4.13 Is Being Released Today With New Features
  12. Trying Out Radeon R9 290 Graphics On Open-Source
Latest Forum Discussions
  1. The GNOME Foundation Is Running Short On Money
  2. Updated and Optimized Ubuntu Free Graphics Drivers
  3. Radeon 8000M problematic on Linux?
  4. After Jack Keane, RuseSoft will briing Ankh 3 to Linux through Desura
  5. Suspected PHP Proxy Issue
  6. Linux Kernel Developers Fed Up With Ridiculous Bugs In Systemd
  7. Change installation destination from home directory
  8. Bye bye BSD, Hello Linux: A Sys Admin's Story