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 Benchmarking Platform
Phoromatic Test Orchestration

Hot Relocation HDD To SSD Support For Btrfs

Free Software

Published on 22 May 2013 01:34 AM EDT
Written by Michael Larabel in Free Software
20 Comments

In working to enhance the performance of the Btrfs file-system in cases where certain data/files are frequently used, a set of patches for providing hot relocation support has been posted.

The Btrfs hot relocation support comes down to when storing data on a traditional (rotating) hard disk drive, when data gets "hot" (a.k.a. being frequently used), these patches would allow the data to be automatically migrated to a non-rotating disk (i.e. solid-state drive). By moving the frequently used data over to an SSD, the performance would obviously be much more optimal than keeping it on an SSD but making it so not all of your data would need to be stored on a costly SSD.

Published late last year was VFS hot data tracking for the Linux kernel for being able to track the "temperature" of data on the disk to be used in situations like this for auto-migration of data from HDDs to SSDs. An alternative to this in hybrid HDD/SSD environments would also be using the newly-introduced BCache HDD/SSD caching framework that has been added to the Linux 3.10 kernel.

The Btrfs hot data relocation support hasn't been merged into any Btrfs next tree yet nor is it known if it will be merged potentially for the Linux 3.11 kernel, but details on how this relocation support plus the experimental patches can be found on the Linux kernel mailing list.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
Latest Linux News
  1. NVIDIA's Proprietary Driver Is Moving Closer With Kernel Mode-Setting
  2. The Latest Linux Kernel Git Code Fixes The EXT4 RAID0 Corruption Problem
  3. Features Added To Mesa 10.6 For Open-Source GPU Drivers
  4. Ubuntu's LXD vs. KVM For The Linux Cloud
  5. Fedora Server 22 Benchmarks With XFS & The Linux 4.0 Kernel
  6. GCC 6 Gets Support For The IBM z13 Mainframe Server
  7. Fedora 22 Is Being Released Next Tuesday
  8. OpenWRT 15.05 Preparing Improved Security & Better Networking
  9. Using The New LLVM/Clang OpenMP Support
  10. Zapcc Claims To Be A "Much Faster C++ Compiler"
Latest Articles & Reviews
  1. Btrfs RAID 0/1 Benchmarks On The Linux 4.1 Kernel
  2. The State Of Various Firefox Features
  3. Intel Iris Graphics Performance With Mesa 10.6
  4. Fedora Workstation 22 Is Looking Great, Running Fantastic
Most Viewed News This Week
  1. The Linux 4.0 Kernel Currently Has An EXT4 Corruption Issue
  2. The Linux 4.0 EXT4 RAID Corruption Bug Has Been Uncovered
  3. AMDGPU Open-Source Driver Code Continues Maturing
  4. Microsoft Open-Sources The Windows Communication Foundation
  5. Another HTTPS Vulnerability Rattles The Internet
  6. LibreOffice 5.0 Open-Source Office Suite Has Been Branched
  7. Systemd 220 Has Finally Been Released
  8. Will Ubuntu Linux Hit 200 Million Users This Year?