SSD’s, Journaling, and noatime/relatime

On occasion, you will see the advice that the ext3 file system is not suitable for Solid State Disks (SSD’s) due to the extra writes caused by journaling — and so Linux users using SSD’s should use ext2 instead. However, is this folk wisdom actually true? This weekend, I decided to measure exactly what the write overhead of journaling actually is in actual practice.

For this experiment I used ext4, since I recently added a feature to track the amount of writes to the file system over its lifetime (to better gauge the wear and tear on an SSD). Ext4 also has the advantage that (starting in 2.6.29), it can support operations with and without a journal, allowing me to do a controlled experiment where I could manipulate only that one variable. The test workload I chose was a simple one: Read more.

Related Posts

The Car Analogy By Tal Schechter: What if buying a new car were like using nonfree software? While the following example may seem a little far-fetched, it is a pretty...
Lest CodePlex perplex by Richard M. Stallman: Many in our community are suspicious of the CodePlex Foundation. With its board of directors dominated by Microsoft employees ...
How to stop Conflicker: Switch to Linux On April 1st, the Conficker worm, perhaps the most wide-spread malware program in history, is set to activate. We don't know what Conficker will do, b...
A Practical Guide to GPL Compliance The Linux kernel, and most of the software that makes it usable are governed by the GPL, or the GNU General Public License. Now at version 3 (GPLv3), ...
What If All Software Was Open Source? A Code to Unlock the Desktop What if all software was open source? Anybody would then be able to add custom features to Microsoft Word, Adobe Photoshop, Apple iTunes or any other ...
Intellectual Property and Risks to the Public Hi, I am Victoria Espinel, the U.S. Intellectual Property Enforcement Coordinator. I am honored to have been appointed by President Barack Obama and c...

We Recommend These Vendors and Free Offers

ContainerizeThis 2016 is a free, 2-day conference for all things containers and big data. Featured, will be presentations and free, hands-on workshops. Learn more at ContainerizeThis.com

Launch an SSD VPS in Europe, USA, Asia & Australia on Vultr's KVM-based Cloud platform starting at $5:00/month (15 GB SSD, 768 MB of RAM).

Deploy an SSD Cloud server in 55 seconds on DigitalOcean. Built for developers and starting at $5:00/month (20 GB SSD, 512 MB of RAM).

Want to become an expert ethical hacker and penetration tester? Request your free video training course of Online Penetration Testing and Ethical Hacking

Whether you're new to Linux or are a Linux guru, you can learn a lot more about the Linux kernel by requesting your free ebook of Linux Kernel In A Nutshell.


Leave a Comment

Your email address will not be published. Required fields are marked *

*