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Workshop at CERN

November 27, 2014 5 comments

cern_logoLast week, Thomas, Christian and myself were attending a workshop in CERN, the European Organization for Nuclear Research in Geneve, Switzerland.

CERN is a very inspiring place, attracting intelligent people from all over the world to get behind the secrets of our being. I felt honored to be at the place where for example the world wide web was invented.

The event was called Workshop on Cloud Services for File Synchronisation and Sharing and was hosted by CERN IT department. There have been around 100 attendees.

I was giving a talk called The File Sync Algorithm of the ownCloud Desktop Clients, which was very well received. If you happen to be interested in the sync algorithm we’re using, the slides are a nice starting point.

What amazed me most was the great atmosphere and the very positive attitude towards ownCloud. Many representatives of edu organizations that use ownCloud to which I talked were very happy with the product (even though there are problems here and there) from the technical POV. A lot of interesting setups and environments were explained and also showcased ownCloud’s flexibility to integrate into existing structures.

What also was pointed out by the attendees of the workshop was the importance of the fact that ownCloud is open source. Non free software does not have a chance at all in that market. That was the very clear statement in the final discussion session of the workshop.

The keynote was given by Prof. Benjamin Pierce from Pennsylvania with the title Principles of Synchronization. He is the lead author of
the project Unison which is another opensource sync project. It’s sync engine marks very high quality, but is not “up-to-date software” any more as he said.

I had the pleasure to spend quite some time with him to discuss syncing in general and our sync algorithms in particular, amongst other interesting things.

Atlas Detectors

Atlas Detectors

As part of his work, he works with a tool called QuickCheck to do very enhanced testing. One night we were sitting in the cantina there hacking to adopt the testing to ownCloud client and server. The first results were very promising, for example we revealed a “problem” in our sync core that I knew of, which formally is a sync error, yet very very unlikely to happen and thus accepted for the sake of an easier algorithm. It was impressive how fast the testing method was identifying that problem.
I like to follow up with the testing method.

Furthermore we met with a whole variety of other interesting people, backend developers, operators of the huge datasets (100 Peta-Byte), the director of CERN IT, a maintainer of the Scientific Linux and others.

Also we had the chance to visit the Atlas experiment, it is 100 meter underneath the surface and huge. That is where the particles are accelerated, and it was great to have the chance to visit that.

The trip was a great experience and very motivating for me, and I think it should be for all of us all doing ownCloud. Frank was really hitting a nerv when he was seeding the idea, and we all were doing a nice product of it so far.

Lets do more of this cool stuff!

Categories: Event, FOSS, ownCloud Tags: , , ,

Let’s party!

July 24, 2014 1 comment

Yesterday, we released ownCloud 7. You might have read that somewhere on the internet – it was widely announced and broadly picked up. If you do not have ownCloud yet, you really should try it now, and if you are one of the people happily using ownCloud for a while, update soon!

In my opinion, ownCloud 7 is a real step ahead. So much work went into it from the brave server guys, and the result is simply impressive: It is fast, beautiful and fully focused on what it is supposed to be and do: File sync and share, even though you still have of course all the other useful stuff like calendaring and such.

Apart from the wellknown features ownCloud 7 also brings some things that you do not see on the first look. Some of these things relate to syncing and as a guy working mainly on the sync client I am especially happy about that: Already with the current released clients you will see a performance win in syncing, because ownCloud 7 handles parallel HTTP requests way better. Moreover, ownCloud 7 sends some interesting information about it’s files, and the next generation of sync clients will for example know which files are shared and their permissions. We are currently working on some exciting stuff on the client side, stay tuned.

Release Party ownCloud 7

That all should be reason enough to celebrate together, because ownCloud is done by all of us in the community.

On Tuesday, august 5th, we will do a Release Party in Nuremberg, Germany. As last time, the Coworkingspace Nürnberg is hosting us. We will start at 18:00.

Everybody who is interested in ownCloud for whatever reason is very welcome to show up. We will probably have a short informal demonstration or two, but of course plenty room for questions, discussions, meet and greet with all kind of FOSS people, some core ownCloud people, nice beer and big fun.

You really should come! And don’t forget to tell your friends, thanks!

Categories: Event, FOSS, ownCloud, Release Tags: , ,

ownCloud @ Chemnitzer Linuxtage 2014

March 19, 2014 6 comments

Last weekend Daniel, Arthur, Morris and me were in Chemnitz where the Chemnitzer Linuxtage 2014 took place. We drove a booth during the two days, the CLT host around 60 boothes of companies and FOSS projects. I like to go to the CLT because it is perfectly organized with great enthusiasm of everybody involved from the organisation team. Food, schedules, the venue, everything is perfect.

Even on saturday morning, short after opening of the event, somebody from the orga team was showing up on the booth with chocolate for the volunteers, saying hello and asking if everything is in place for a successful weekend. A small detail, which shows how much effort is put into organization of the event.

As a result, visitors come to visit the event. It’s mostly a community centric event: Exhibitors are mostly representing FOSS projects such as openstreetmap.org, distributions like Fedora or openSUSE or companies from the free software market.

Morris in action on the booth

Morris in action on the booth

The majority of visitors are mostly interested in private use of the software. But, no rule without exception, we also had a remarkable number of people from companies, either executives or people working in the IT departments, who were interested in ownCloud.

Speaking about ownCloud, I want to say that it’s amazing to represent our project. People know it, people like it, people use it. In private, but also in professional space people work with ownCloud already or are planing to start with ownCloud. ownCloud already is the accepted solution for the problems that became so practical with the NSA scandal last year.

My talk with title A private Cloud with ownCloud on Saturday morning was very well received and went smooth. The room was too small, lots of people had to stand or sit on the stairs. It was a very positive atmosphere.

Something that changed compared to last year and the year before: Most discussions were around how ownCloud can be installed, integrated and used and not any more about which features are still missing or maybe also bugs.

So it were two very exhausting days, but big fun! Thanks to Daniel, Arthur and Morris for the work and fun we had on the booth, and thanks to the CLT team for CLT.

Categories: Event, FOSS, ownCloud Tags: , , ,

ownCloud 6 Releaseparty in Nuremberg

December 13, 2013 5 comments

oc6_releaseparty

The ownCloud community released ownCloud 6 a couple of days ago. That was another big release and we want to celebrate!

Please, everybody who is interested in ownCloud, like to learn more, give feedback or just want to meet other people from the community, you are invited to show up at Coworking Space in Nuremberg, Josephsplatz 8, on december 18th, 6pm.

We will have a relaxed evening with a little discussion, maybe short demos, cakes and stuff, and fun. No heavy talks and serious faces!

We are looking forward to meeting you.

ownCloud Client May Hackfest

May 3, 2013 4 comments

Again we’re meeting in Berlin at Woboq Intl. Headquarters to work on the ownCloud Sync Client again. One of our topics is the still not completely fixed problem with conflict files. There has been lots of troubles about false conflict files the client is generating in that situations were the ETag database is wasted.

We revisited this problem and will come up with a better solution.

The key changes will probably be

  • Conflict files will never again be generated on the server. Even if we are in a conflict situation, we will download the file and keep the conflicting version only on the client. This enables us to detect false conflicts.
  • The current way we handle a system time difference has to be changed. We wont adjust the file mtimes of files in the file system any more with the time difference between the client and server. That way we do not suffer from floating time differences any more.
    For the decision of which version is more recent, we will still consider the time difference.
  • We will use a very quick request like OPTION to get the servers time setting to the client. That will allow to calculate the time difference between server and client more accurately. It’s needed to decide which file is more recent.

aktoc
Read this as a note to self, yet we feel very well fitting into Berlin round may 1st 😉

Photo credit: 96dpi / CC BY-NC

ownCloud Meetup in Nürnberg

February 20, 2013 3 comments

Next week a part of the ownCloud team will meet in Nürnberg for a creative time and we thought a little meetup would be cool. Join us for a relaxed evening where we will give short talks about current state of ownCloud, new features and the near future.

Let’s meet
Wednesday, February 27th, 6:00 PM at the Nuremberg Coworking Space.

Talks (short, don’t be afraid!):

  • ownCloud overview by Holger Dyroff
  • The updated ownCloud 5 User Interface by Jan-Christoph Borchardt
  • Next steps for the ownCloud Desktop Clients by Daniel Molkentin

The evening closes with a get-together, your chance to meet the team and discuss in a relaxed atmosphere.

Everybody is welcome!

Categories: Event, FOSS, ownCloud Tags:

A week for csync

December 9, 2012 11 comments

On Friday I arrived back from Berlin where I had the pleasure to work with my great colleague Danimo and our friends from Woboq, Markus and Olivier, in the Woboq Headquarter in Berlin Kreuzberg for a week.

We thought that it might be fun to work together on csync, our sync engine under the hood of the ownCloud client. There were some issues that should be fixed and on the way we cleaned and improved quite some code in csync.

Here are some things we worked on:

  • We added a function that lets the program that uses the csync library pass arbitrary module parameters to the backend module. That way its more easy to steer the behaviour of the ownCloud modules from the calling app.
  • Error handling was improved, ie. if an http error happens, csync works errno based error reporting. We added custom errnos because not all error cases with http can be mapped to system errnos.
  • Formerly the csync ownCloud module was spooling files through an additional temporar file on client side. That step is skipped now which results in performance improvements as well as in more clean code.
  • We were able to reduce the number of HTTP requests that go over the wire even more. For example to check if there are changes on server side, now there is exactly one http propfind required. Also if files have to be synced, we could save some HTTP requests by improving caching of some requests.
  • Andreas recently changed the logging system in csync upstream master branch. We merged that back and now do not longer need the log4c framework. One build dependency less and a nice new logging framework.
  • Other bugs were fixed, such as a potential crash if a folder as deleted during it is synced, SSL handling shortcomings, code streamlining in handling compressed data streams and more.
  • We finalized a patch that uniforms the utf8 representations of characters over all platforms. That will fix problems we saw especially with MacOS and special filenames.

Ah, yes, we also did other things, more related to the ownCloud client. Danimo managed to implement a cross platform filesystem watcher class that is able to fulfill our requirements. That obsoletes polling for changes on the local file system, one of the most popular enhancement requests.

And finally there now is a API in csync thats reports file transmission progress if a callback is installed accordingly. So the client hopefully soon will tell ya what it’s doing for you. Also appreciated I guess…

Last but not least we added code to use QtKeyChain, a cross platform password storage library that stores password encrypted. For example on Linux QtKeyChain connects to kwallet. QtKeyChain was provided by
Frank Osterfeld, thanks a lot for that contribution.

Quite some stuff for a short week, note that stuff that fills a short line in this blog can be quite nifty to investigate, implement and test. Not everything is stable, polished and properly integrated but it was a great and productive week. The next release of ownCloud Client will be a nice one.

woboq_dinner2
And sice you can not always work, we had a nice dinner at a very cool italian restaurant. We met with other ownCloud employees located in Berlin, Arthur and Georg. Fun 🙂 And Berlin, yes, a great place to be, but finally I appreciated to arrive back to my snow covered home.

Many thanks to Olivier and Markus for hosting us and for the nice week.