Archive for the »OFS« Category

OFS en español

August 7, 2010 - 12:59 pm

During some googeling yesterday I found that Linux New Media has translate our article about OFS into spanish language.

Here is the PDF:

Category: Linux, OFS  No Comments »

OFS proposal for Linux-Kongress accepted

July 1, 2010 - 5:16 pm

Linux-Kongress 2010I’m very happy to inform you, that I will speak at this year’s Linux-Kongress.

Some weeks ago I submitted an abstract for a talk about OFS. This week an e-mail from the chair of the program committee arrived, telling me that the proposal had been accepted.

Together with Prof. Trommler and Samuel Walz, student from the last OFS project group, I will prepare the paper as well as the presentation.

The Linux-Kongress will take place at the Georg-Simon-Ohm University – the home of OFS. You will find more information such as programm and abstracts on their website

Our talk is scheduled for 1:30 pm on the second day of talks and here is the link to the abstract.

Now there’s much work ahead, but I’m looking forward to this event.

Category: Linux, OFS  No Comments »

OFS linux magazine articles online

December 22, 2009 - 1:08 am


Article in english Linux Magazine

As you probably know we wrote an article about OFS for the german Linux Magazin and the english Linux Pro Magazine one year ago.

Both, the german and the english article are now available online.


I really recommend reading it if you did not had the possibility to get the magazine.

We wrote about the concepts of OFS and our plans. We went a big step into the right direction, but there is still much work. For example OFS is much more stable today, but we still lack a decent GUI.

Take a look at the articles and share our ideas.

Category: Computer, Linux, Non-technical, OFS, Technical  1 Comment »

OFS and csync

July 1, 2009 - 10:15 pm

csyncToday I met Andreas Schneider, developer of the csync tool. This little program is designed to effectively synchronize files between a local directory and a smb share without mounting it. It is especially used for implementing roaming profiles in linux.

Andreas is also very interested in file synchronization and offline working concepts. We shared some ideas and discussed the aims of our projects.

He has many innovative approaches to file synchronization in general and I see many points for collaboration.

Category: Linux, OFS  No Comments »

Extended Attributes as user interface – be careful

June 29, 2009 - 10:54 pm

We have decided to use extended attributes in OFS to enable communication between user and filesystem with standard linux tool. Today I came across the first disadvantage of this choice.

I was wondering why gedit claimed that it were not possible to save the backup file. After some debugging I discovered that it tried to copy all extended attributes from the original to the backup file.

In fact, this is a very good idea, especially when using ACLs (which are stored as extended attributes). In OFS we have a little problem with that. Think of setting the “ofs.available” flag to a random file inside the tree. This makes no sense is is denied by OFS. As a result, gedit failes in creating this file.

My fix for this was to hide the ofs.* attributes. This means I removed them from the listxattr FUSE callback, so that they are still available but get not exposed when someone asks for all available attributes.

I don’t know if using attributes which are not visible will raise new problems – time will show…

Category: Linux, OFS  No Comments »

Student project: Cache-manager for OFS

June 18, 2009 - 7:17 pm

Today I visited university again. Three students held a presentation about caching strategies for OFS.

In March Professor Trommler started this project and the students did very good research since then. The approaches are promising and partially close to my own ideas about improvements in OFS.

I’m very keen on the implementation which will start about end of July, after they have finished their exams.

Category: Linux, OFS, Uncategorized  No Comments »

List of bugs and todos for OFS

- 7:05 pm

As promised I’ve posted a set of todos and open bugs to the OFS bugtracker.

I hope I’ll find the time to implement some and can motivate a few people to help me with the others. :)

Category: OFS  No Comments »

Bugtracker and mailing list for OFS

June 11, 2009 - 11:39 am

To improve communication with our users, we set up a mailing list and a bugtracker for the OFS project.

The list works on a mailman based system, provided by sourceforge and since I didn’t like the SF internal tracker, I decided to use mantis for this. Well, I couldn’t find a better point in time to enable mantis. One day later SF announced in a mail, that they will restructure their hosted apps – this means URL will change over the next weeks. Never mind, the old ones will be redirected.

So far – I’ve created a list of TODOs for OFS and will hack them into the bugtracker now.

I encourage you to subscribe to the mailing list to keep up-to-date with the progress of OFS.

Category: OFS  1 Comment »