Tag: btrfs

Finding Corrupt Files that cause a Kernel Error

There is a BTRFS bug in kernel 3.13 which is triggered by Kmail and causes Kmail index files to become seriously corrupt. Another bug in BTRFS causes a kernel GPF when an application tries to read such a file, that results in a SEGV being sent to the application. After that the kernel ceases to […]

storage

BTRFS Status March 2014

I’m currently using BTRFS on most systems that I can access easily. It’s not nearly reliable enough that I want to install it on a server in another country or an embedded device that’s only accessible via 3G, but for systems where I can access the console it’s not doing too badly. Balancing and Space […]

storage

Dell PowerEdge T110

In June 2008 I received a Dell PowerEdge T105 server to run in my home for a client [1]. That system has run well for over 5 years for the purposes of my client and also as my own home fileserver and as a workstation. But now it’s getting a bit old, while it was […]

Review

Google web sites and Chromium CPU Use

Chromium is the free software build of the Google Chrome web browser. It’s essentially the same as the Google code but will often be an older version, particularly when you get Chromium from Debian/Stable (or any other Linux distribution that doesn’t track the latest versions all the time) and compare it to getting Chrome straight […]

Misc Computer

Using BTRFS

I’ve just installed BTRFS on some systems that matter to me. It is still regarded as experimental but Oracle supports it with their kernel so it can’t be too bad – and it’s almost guaranteed that anything other than BTRFS or ZFS will lose data if you run as many systems as I do. Also […]

Ha unix-tips

Cheap Bulk Storage

The Problem Some of my clients need systems that store reasonable amounts of data. This is enough data that we can expect some data corruption on disk such that traditional RAID doesn’t work, that old fashioned filesystems like Ext3/4 will have unreasonable fsck fimes, and that the number of disks in a small server isn’t […]

storage

Hard Drives for Backup

The general trend seems to be that cheap hard drives are increasing in capacity faster than much of the data that is commonly stored. Back in 1998 I had a 3G disk in my laptop and about 800M was used for my home directory. Now I have 6.2G used for my home directory (and another […]

Ha

ZFS on Debian/Wheezy

As storage capacities increase the probability of data corruption increases as does the amount of time required for a fsck on a traditional filesystem. Also the capacity of disks is increasing a lot faster than the contiguous IO speed which means that the RAID rebuild time is increasing, for example my first hard disk was […]

Ha Linux

BTRFS and ZFS as Layering Violations

LWN has an interesting article comparing recent developments in the Linux world to the “Unix Wars” that essentially killed every proprietary Unix system [1]. The article is really interesting and I recommend reading it, it’s probably only available to subscribers at the moment but should be generally available in a week or so (I used […]

Ha storage

ZFS vs BTRFS on Cheap Dell Servers

I previously wrote about my first experiences with BTRFS [1]. Since then I’ve been using BTRFS on more systems and have had good results. The main problem I want to address is with the reliability of RAID [2]. Requirements for a File Server Now one of my clients has a need for a new fileserver. […]

Ha storage