Self-Optimizing Hard Drives: Advice?
Hello, I am a computer engineering student studying Linux kernel development. My 4-man team was tasked to propose a kernel development project (to be implemented in 6 weeks), and we came up with a tentative "Self-Optimizing Hard Disk Drive Linux Kernel Module". I'm not sure if that title makes sense to the pros.
We based the proposal on this project: http://www.cc.gatech.edu/~sburnett/download/borg.pdf
The goal of the project is to minimize hard disk access times. The plan is to create a special partition where the "most commonly used" files are to be placed. An LKM will profile, analyze, plan, and redirect I/O operations to the hard disk. This LKM should primarily be able to predict and redirect all file access (on files with sizes of < 10 MB) with minimal overhead, and lessen average read/write access times to the hard disk. I believe Apple's HFS has this feature.
Can anybody suggest a starting point? I recently found a way to redirect I/O operations by intercepting system calls (by hijacking all the read/write ones). However, I'm not convinced that this is the best way to go. Is there a way to write a driver that redirects these read/write operations? Can we perhaps tap into the read/write cache to achieve the same effect?
Any feedback at all is appreciated.
Sample system call hijack code:
http://memset.wordpress.com/2011/01/20/syscall-hijacking-dynamically-obtain-syscall-table-address-kernel-2-6-x/
Comments
-
I'm sorry that you still haven't received a reply, although what your asking is above the heads of most of us here. There are experts that visit though, so, if you're patient, you might actually come up with some good answers.
My only experience with something on this line was in the early days of pc's when we would gulp large parts of files into computer memory, work on the data, them push the info back. This has nothing to do with intercepting system I/O calls in Linux kernels, it was using already existing IRQ's within DOS.
To my knowledge HD I/O is already fairly well optimized, so, if you come across something interesting, please let us know. Until that time, be patient, and maybe someone can actually help you here. Interesting assignment.0 -
As you may have expected, there is more than one way around this barn. You can, as you are trying to do, intercept system write calls (dangerous side effects), or you can modify the appropriate file system driver code to vector out to your own code when appropriate data is received. If performing the latter, then you will probably want to use the ext2 file system driver for this project (it is the root for ext3 and ext4 as well, so should work for all of those).0
Categories
- All Categories
- 212 LFX Mentorship
- 212 LFX Mentorship: Linux Kernel
- 747 Linux Foundation IT Professional Programs
- 343 Cloud Engineer IT Professional Program
- 168 Advanced Cloud Engineer IT Professional Program
- 71 DevOps Engineer IT Professional Program
- 134 Cloud Native Developer IT Professional Program
- 136 Express Training Courses
- 136 Express Courses - Discussion Forum
- 6.1K Training Courses
- 44 LFC110 Class Forum - Discontinued
- 70 LFC131 Class Forum
- 42 LFD102 Class Forum
- 225 LFD103 Class Forum
- 18 LFD110 Class Forum
- 36 LFD121 Class Forum
- 18 LFD133 Class Forum
- 7 LFD134 Class Forum
- 18 LFD137 Class Forum
- 71 LFD201 Class Forum
- 4 LFD210 Class Forum
- 5 LFD210-CN Class Forum
- 2 LFD213 Class Forum - Discontinued
- 128 LFD232 Class Forum - Discontinued
- 2 LFD233 Class Forum
- 4 LFD237 Class Forum
- 24 LFD254 Class Forum
- 692 LFD259 Class Forum
- 111 LFD272 Class Forum
- 4 LFD272-JP クラス フォーラム
- 12 LFD273 Class Forum
- 133 LFS101 Class Forum
- 1 LFS111 Class Forum
- 3 LFS112 Class Forum
- 2 LFS116 Class Forum
- 4 LFS118 Class Forum
- 4 LFS142 Class Forum
- 5 LFS144 Class Forum
- 4 LFS145 Class Forum
- 2 LFS146 Class Forum
- 3 LFS147 Class Forum
- LFS148 Class Forum
- 15 LFS151 Class Forum
- 2 LFS157 Class Forum
- 23 LFS158 Class Forum
- 6 LFS162 Class Forum
- 2 LFS166 Class Forum
- 4 LFS167 Class Forum
- 3 LFS170 Class Forum
- 2 LFS171 Class Forum
- 3 LFS178 Class Forum
- 3 LFS180 Class Forum
- 2 LFS182 Class Forum
- 5 LFS183 Class Forum
- 31 LFS200 Class Forum
- 737 LFS201 Class Forum - Discontinued
- 3 LFS201-JP クラス フォーラム
- 18 LFS203 Class Forum
- 125 LFS207 Class Forum
- 2 LFS207-DE-Klassenforum
- 1 LFS207-JP クラス フォーラム
- 302 LFS211 Class Forum
- 56 LFS216 Class Forum
- 52 LFS241 Class Forum
- 48 LFS242 Class Forum
- 38 LFS243 Class Forum
- 15 LFS244 Class Forum
- 2 LFS245 Class Forum
- LFS246 Class Forum
- 48 LFS250 Class Forum
- 2 LFS250-JP クラス フォーラム
- 1 LFS251 Class Forum
- 149 LFS253 Class Forum
- 1 LFS254 Class Forum
- 1 LFS255 Class Forum
- 7 LFS256 Class Forum
- 1 LFS257 Class Forum
- 1.2K LFS258 Class Forum
- 10 LFS258-JP クラス フォーラム
- 117 LFS260 Class Forum
- 159 LFS261 Class Forum
- 42 LFS262 Class Forum
- 82 LFS263 Class Forum - Discontinued
- 15 LFS264 Class Forum - Discontinued
- 11 LFS266 Class Forum - Discontinued
- 24 LFS267 Class Forum
- 21 LFS268 Class Forum
- 30 LFS269 Class Forum
- 201 LFS272 Class Forum
- 2 LFS272-JP クラス フォーラム
- 1 LFS274 Class Forum
- 4 LFS281 Class Forum
- 9 LFW111 Class Forum
- 259 LFW211 Class Forum
- 181 LFW212 Class Forum
- 13 SKF100 Class Forum
- 1 SKF200 Class Forum
- 1 SKF201 Class Forum
- 795 Hardware
- 199 Drivers
- 68 I/O Devices
- 37 Monitors
- 102 Multimedia
- 174 Networking
- 91 Printers & Scanners
- 85 Storage
- 756 Linux Distributions
- 82 Debian
- 67 Fedora
- 16 Linux Mint
- 13 Mageia
- 23 openSUSE
- 147 Red Hat Enterprise
- 31 Slackware
- 13 SUSE Enterprise
- 353 Ubuntu
- 468 Linux System Administration
- 39 Cloud Computing
- 71 Command Line/Scripting
- Github systems admin projects
- 93 Linux Security
- 78 Network Management
- 102 System Management
- 47 Web Management
- 61 Mobile Computing
- 18 Android
- 31 Development
- 1.2K New to Linux
- 1K Getting Started with Linux
- 369 Off Topic
- 114 Introductions
- 173 Small Talk
- 21 Study Material
- 700 Programming and Development
- 296 Kernel Development
- 386 Software Development
- 1.8K Software
- 236 Applications
- 182 Command Line
- 3 Compiling/Installing
- 985 Games
- 316 Installation
- 92 All In Program
- 92 All In Forum
Upcoming Training
-
August 20, 2018
Kubernetes Administration (LFS458)
-
August 20, 2018
Linux System Administration (LFS301)
-
August 27, 2018
Open Source Virtualization (LFS462)
-
August 27, 2018
Linux Kernel Debugging and Security (LFD440)