Posts Tagged »filesystem«

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: http://www.linux-magazine.es/issue/50/040-043_Offline50.pdf

Category: Linux, OFS  No Comments »

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.

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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. :)

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Diploma thesis and Master thesis online

May 24, 2009 - 8:54 pm

Eclipse plug-in using EMF compare on GMF models

Yesterday I uploaded my master thesis. It’s about visualization of differences between EMF models. The compare tool for EMF (Eclipse Modelling Framework) models, which is called EMF compare and the GMF (Graphical Modelling Framework) has been utilized for this thesis. I developed a plug-in, which shows differences in a GMF-like manner.

For more information and download, have a look here.

Open-Source offline-filesystem solutions

In my diploma thesis I compared several network-filesystems and evaluated their offline-features. It has been online for a while, but now I moved it to my new website. I haven’t translated it into english language so it’s available in german only.

Download it here (german only)

Category: Computer, GMF Compare, OFS  2 Comments »