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Nov. 7th, 2009

LinuxAlt 2009 - Fedora 12 presentation

After insisting that I won't attend the LinuxAlt conference this year I was asked to give a Fedora talk as substitute for one of the scheduled talks. Why not, fortunately my Red Hat colleague and good friend drove me to the conference, thanks Ondrej!

I was surprised (in a good way of course) that the conference has a very good attendance. Both rooms (for apx 150 and little bit more than 80 people) were full up! I've watched talk from Michal Schmidt about Trusted Computing, which I found really interesting and I hope Michal will publish his slides somewhere.

My talk was right after Ubuntu Karmic Koala presentation. Well, I thought that I won't get that many people for my talk, but the room was crowded. It took full hour to go thru all the highlights of Fedora 12 and I even get some questions at the end and few positive comments :-) .. Here are my slides (in czech).

LinuxAlt continues tmrw. Dan Horak will be giving a talk about Open Source development and also Milan Broz and his presentation about LVM will be interesting, as he's one of the key developers and always shares some insights from the project :-)

Nov. 3rd, 2009

LinuxAlt 2009 starts this weekend


The fourth LinuxAlt conference will happen this weekend in Brno on University of Technology - Faculty of information technology. The schedule of the conference is published here. There are quite a few talks, which will be really interesting (especially those from Fedora/Red Hat folks - I can only recommend the talk from Milan Broz, Michal Schmidt or Dan Horak from FESCo). Last year the number of visitors was higher than 300 people which was quite impressing.

So if you have a free weekend (November 7.-8.) and you're close to Brno, don't hesitate to come. The entrance is free of charge.

More info at www.linuxalt.cz, the official poster is here (cz).

Unfortunately since me knee still hurts after I've ruptured some tenses, I'm not giving a talk this year and I won't be attending :-(

Sep. 25th, 2009

Developer Conference - slides

I've uploaded most of the slides to my fedorapeople.org page and linked them on the wiki. Check it out at https://fedoraproject.org/wiki/Developer_Conference_2009 ..

Sep. 14th, 2009

Developer Conference - more photos

Check out a great gallery from Tomas Bzatek .. http://foto.bzatek.net/tmp/devconf_brno_2009/

I'm slowly uploading all presentations to our wiki page. Check that page later this week, most of the slides should be there.

Sep. 12th, 2009

Developer Conference - day #2

Second day of the conference started with basic presentation from Ondrej Vasik about bugs, reporting and quick overview on tools used for debugging and bug reporting. Jiri Moskovcak also joined this session with a demo of ABRT (Automated Bug Reporting Tool) and showed few examples reports and plugins. Jan Safranek continued with Control Groups - Resource Management presentation. His Pacman demo finally explained few people what control groups are about :-) ..

After lunch I've attended Rezza's and Romnan Rakus's presentation about their initiative in system-config-* rewrite. They explained few UI tips that all s-c-tools should follow and also talked about PolicyKit and why the integration of PolicyKit into s-c-tools is important. Tomas Bzatek picked really tough topic for his talk - brief overview on Gnome 3 and it's new architecture. He showed live demo of the development version of Gnome 3 and this opened quite a long discussion about several new approaches Gnome 3 introduces and Tomas was patiently trying to advocate all these changes.

After a short break I've continued to FreeIPA ( http://freeipa.org ) talk from Martin Nagy and Jakub Hrozek. Martin was really nervous before his first public talk but his presentation was really interesting. Maybe still too technical for some people who weren't aware of the FreeIPA concept, but all together I liked this talk quite a lot (and unfortunately I had to leave sooner from this talk). Jindrich and his News from RPM development was one of the last talks. Jindrich explained news in RPM 4.8 and changes, he, Panu and Florian are planning for next version(s). Also showed how XZ and compressing headers can cut down the RPM sizes.

I haven't followed much of the JBoss talks but their attendance was really good. The lab they were running on Friday ended way after the last talk and people were leaving the lab excited!

But Friday hasn't ended yet and we've moved the DevConf pub. We went to the same pub as last year, unfortunately the waiters have changed there a bit and weren't very friendly. We'll find something better next year. Anyway, I think we all had fun for those two days and that was the plan. I'll see you all next year.

Sep. 10th, 2009

Developer Conference - day #1

The first day of the Developer Conference in Brno is over and it's been an exhausting day. I've spent whole morning running around both presentation rooms, fixing last minute problems and taking some pictures. We've managed to start on time, get the lab prepared and both rooms had their projectors up and running .. what a nice surprise! :)



I have followed presentation in D3 room, Power management and Effective programming techniques. Some of the results Jiri, Ivana and Marcela showed were really interesting. But the secondary purpose of their presentations was to get people for their afternoon Watt hunting competition. Hopefully one of them will post something soon about this event - I think it was really interesting but most of all well prepared from the whole crew. People were submitting their code to test server, which run it on a test data and showed the results. The results were updated on the fly and projected, so every could see how their implementation is doing. The competition was open for any programming language, but it soon turned out that python and perl are just too slow and the most effective way was bash scripting or plain C.




I've little bit overestimated the number of attendees - well, at least we weren't hungry on the lunch break, cos I've quite a lot of food. After the lunch I've counted the audience, and my rough number is 170 people - which I think is pretty good (well, I was hoping for beating 200 attendees - maybe tomorrow)




In the afternoon I've attended Petr Muller's system tap talk, part of the KDE talk and I've continued later watching Peter Vrabec and his work in openscap ( http://open-scap.org ). Stepan Kasal started his talk in Russian, switched to Slovak, Czech and continued in English :-) .. he highlighted some of the changes he and Marcela plan to do in perl after Fedora 12. Let's see what happens.



Wrap up - first day was good, tomorrow will be maybe even better :-) ... cu there.

Sep. 9th, 2009

Developer Conference in Brno,CZ starts tomorrow!

.. and I'm getting really excited. Today we've set up the lab, it's quite hot in that room so we put some extra fans. Hopefully people will survive there tomorrow. Also we've tested both presentation rooms, projectors and mics work just great. We've also managed to get nice budget for food during the day, so expect sandwiches for lunch, snack and coffee and great party on Friday evening.

So the grand opening is tomorrow at 9 with few words from myself and the site manager of Red Hat Czech. After this short keynote, the day is going to split in to JBoss track, Fedora track and the lab. Hopefully the lab will be fun - we're trying something new here. The afternoon lab session is basically a competition - watt hunting. The goal is to optimize given code to get less ticks, less disk IOs etc. (Nice prices are prepared for the winners)

Ok, I see some of you tomorrow. Have fun!

Sep. 7th, 2009

Red Hat Summit - Chicago

This year for the first time I had the opportunity to attend the Red Hat Summit held in Chicago. I was really excited to see the other side of the barricade and have a talk with Red Hat customers and partners. We've arrived on Sunday evening, totally trashed after 12hrs on the plane. The Hilton hotel where the conference took place is right in the middle of downtown Chicago, so the first thing we did on Monday morning was a short walk around the city center. We both had some work to do on Monday, but we've decided to spend Tuesday sightseeing. It's a nice and clean city and the river boat architecture tour is a great chance to learn more about the history of the whole city and some urban legends. Also the Sears tower with the glass ledge is a must when visiting Chicago – it’s scary but awesome.






The summit registration opened on Tuesday afternoon and we have already met several Red Hatters in the main lobby. The registration was followed by reception and the partner pavilion opening. The summit was just about to begin.

The summit has started and Jim Whitehurst - CEO and President of Red Hat - started with the opening keynote. His main focus was on Red Hat value and contribution of the company in comparison with overall growth of opensource. Also the topic which connected most of the presentations this year was cloud and the cloud computing. Paul Cormier followed with short history lesson and pointed out the most significant innovations Red Hat started or helped to develop (RHEL+JBoss, SELinux, AMQP, JBoss Seam, etc). Next keynote was presented by Derek Chen - Head of Digital Operations at Dreamworks. As much as he tried, his presentation looked more like an Intel advertisement. Interesting part was the history of cloud computing at Dreamworks and their recent movie making experience done with internal and external cloud (IIRC they used 20.000 cores and 4 different sites connected with Dual Gigabit lines).




Slightly before lunch Tim Burke and Subhendu Ghosh held a presentation about Red Hat Enterprise Linux roadmap. They pointed out most important milestones in the release cycle as well as key features in RHEL 5.3 and the newly announced and still fresh 5.4. They touched little bit of RHEL6 as well and this topic was again opened later that day on an open session led by Sidhard and Subhendu. Tim also briefly talked about RHEV and the showed few pictures of the beta.

After refreshing lunch I’ve attended presentation by Michael Stahnke - Managing Infrastructure as a Development Project. Very funny presentation indeed, Michael presented his way of leading an IT team. I personally liked his notes on hiring skilled and right people for the team. Unfortunately I don’t think this talk was recorded. Several other presentations followed, MRG was one of the more interesting ones. The day has ended again with Sidharth and Subhendu and an open discussion about RHEL6 features. Few crazy ideas were proposed, few ideas which are for sure low hanging fruit for Red Hat and Fedora and few things where we’ve been thinking about them for some time and which doesn’t have the right priority – one of them was the idea of minimal installation path and install templates for various setups (web server, print server, file server etc) which was mentioned several times.

The day ended with a great party in Al Capone style with live jazz music, casino, poker and roulette and JBoss party with “spiky-hair” DJ.

Second day of the conference was opened by Brian Stevens and his nice explanation of the cloud and ways how Red Hat contributes to the cloud by creating several related products and projects. He was followed by a NYSE guy talking about the value opensource brought to their business. An interesting thing he mentioned was that they don’t ever plan a single vendor locking and they will always rely on various systems and various providers.

One of the best sessions I’ve attended was a two hour presentation called Performance Analysis and Tuning of Red Hat Enterprise Linux. Larry Woodman and John „Shak“ Shakshober showed several ways how to modify system variables to tweak your system for best performance and various appliances. They also did a brief overview on all tools used for monitoring system performance.

The afternoon sessions I’ve picked were slightly more boring than previous presentations. The MRG talk for developers sounded promising but I’ve soon realized that the AMQP API is not simple at all and it will probably need way more time and reading to fully understand the way it was designed. I have also attended a presentation by Andrew Hecox about Creating a Low Cost Red Hat Enterprise Linux Deployment – mostly he talked about the way how Red Hat support is structured and various tools GSS/Support is using for debugging. He even slightly mentioned ABRT :-). After that presentation I took a little break and got myself ready for next party!

The last party was at Museum of Science and Industry. I must admit that this was a great choice and the combination of the tech-exhibitions, good food, awesome ice-cream, again great music and of course great people was just perfect. We came back to the hotel exhausted and instead of JBoss pub-crawl I’ve chosen to do a “bed-crawl”.



On Friday, the last day of the conference, everyone looked quite tired. No wonder why, the last two days were just pumped up with great stuff. I’ve attended two talks, the Collaborative Innovation was more an open discussion about different examples where collaboration helps and how collaboration should be improved. The other one was a presentation about Spike, which turned out to be quite boring. The day closed by lunch and Innovations awards, where several companies were picked to receive an award from Paul Cormier. It’s a pity that it was not explained why that particular company received an award and what was their “innovation” about. We took and nice and comfy limo back to O’Hara airport and headed home.

Few more pictures are available here .. http://picasaweb.google.com/radekvokal/ChicagoUSA#

Aug. 19th, 2009

Testing ABRT before ABRT test day

Today I've decided to give a shot to latest development version of the ABRT project - Automated Bug Reporting Tools. I have followed instructions which are prepared for Fedora test day, which is going to happen tomorrow.

Step first - install the testing repo from Jiri, one of the main developers

$ wget http://jmoskovc.fedorapeople.org/abrt.repo

and get the base desktop page, which pulls in all necessary plugins

$ yum install abrt-desktop

now start the service (or even better chkconfig it so it starts with your system) and restart your X session.

$ service abrt start

This will start the deamon which is watching crashes on your system and the applet icon, which will notify you about it. What next - wait for the crash! :-). Well, on my test box it took only few minutes to observe first crash - while playing a youtube video the nspluginwrapper crashed.



Awesome, I got notified about it. Clicking on the icon takes you to abrt-gui.



Ok, so I need to send redhat some report about it. I've clicked report and the actual report started generating itself. It took some time, while all debuginfo packages were dowloaded and the report generated. The debuginfo download is optional but strongly suggested, thou it takes couple minutes to download all necessary packages.



Finally, my report is here. I've added brief description and hit send .. and it failed to send report to bugzilla, cos I didn't configured the plugin yet. Ok, back to main screen, preferences and options for Bugzilla plugin, adding my name and password there (actually I think the tool should ask for password and login if its not stored). Anyway, hiting Report again doesn't download anything, cos the report is already generated and stored and hitting send brought me another error - Couldn't resolve bugzilla.redhat.com - strange, but after hiting Report again and trying to send report one more time everything worked smoothly.




Great, I even have bug number! My first report using ABRT is done. Unfortunately you have to check that you want to send out backtrace and the second time I was sending the report I forget about this. I've already talked to Jiri and sending backtrace should be checked as default, thou I understand the concern, that backtrace might contain some data user doesn't want to share worldwide.

The tool looks much more promising now than in Fedora 11, where the GUI part was unusable. If you're interested, QA is running the ABRT test day tmrw.
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Jul. 24th, 2009

Brno Developer Conference - semi-final schedule

The Developer Conference in Brno, Czech Republic is getting ready. Yesterday we've prepared the fist version of the schedule. The list of presentations is fairly interesting, half of them will be focused on Fedora development and Fedora projects, almost as much as the Fedora presentation we've got JBoss related topics and JBoss lab. So here's the schedule I promised, more info can be found on fedoraproject.org/wiki/DeveloperConference2009

Thursday

TimeRoom D1Room D3Lab
9:30-10:30Mobicents - Pavel ŠlégrPower management - Jiří Skála / DNSSEC in Fedora - Adam TkáčFedora on Mainframes and Secondary Architectures - Dan Horák
10:30-11:30JON and Jopr - Lukáš Krejčí and Pavel KrálíkEffective programming techniques - Less Watts - Marcela Maslanova and Ivana Hutařová VařekováSetting up private Koji instance & Add-on Repositories - Dan Horák
 LunchLunchLunch
13:00-14:00JBoss Transactions and Web Services - Ivo StudenskýSystemtap and debugging tools - Petr MullerWatt hunting competition - PM group
14:00-15:00Hibernate Search - Juraci CostaKDE topics - what's new in KDE4.3, how to create simple widget - Jaroslav Řezník & Lukáš TinklWatt hunting competition - PM group
15:00-16:00JBoss.org backend - Jozef Chocholáček & Libor KrzyžanekOpenSCAP - Maroš Barabas & Peter VrabecWatt hunting competition - PM group
16:00-17:00Seam & WebBeans - Ondřej Skutka & Jozef HartingerPerl @INC changes in Fedora (short note) - Stepan Kasal & Marcela MaslanovaWatt hunting competition - PM group

Friday

TimeRoom D1Room D3Lab
9:30-10:30jBPM 4 - Jiří Pechanec Bugs' (why and how to report + related tools overview) - Ondřej Vašík / Automated Bug Reporting Tool - TBDJBoss Developer Studio - real life use - Dominik Pospíšil
10:30-11:30 Drools & JBoss BRMS - Lukáš PetrovickýControl Groups and Resource Management - Jan Šafránek a Ivana Hutařová VařekováHow to secure your JEE application - Peter Škopek
 LunchLunchLunch
13:00-14:00OpenJDK - Pavel TišnovskýSystem config guides (Tips on UI, PolicyKit integration) - Jaroslav Řezník & Roman RakusHow to secure your JEE application - Peter Škopek
14:00-15:00GNOME 3.0, gnome-shell, Clutter - Tomáš BžatekCoreutils project - Ondřej Vašík & Kamil DudkaJBoss ESB in practice - Pavel Macík, Martin Večeřa, Lukáš Petrovický
15:00-16:00FreeIPA - Martin Nagy & Jakub Hrozek Autotools tutorial and discussion - Štěpán KasalJBoss Portal - configuration and portlet development
16:00-17:00What's new in RPM - insider info from RPM development - Jindřich NovýBlock diagrams, trees, timing diagrams, mindmaps and it's creating (different SW) - Lukáš DoktorJON and Jopr plugin development - Lukáš Krejčí



Next step - I'm getting few sentences about every presentations and also list of presentations which will be held in English.

Jul. 7th, 2009

Linux Developers and Users Conference 2009 in Brno

If you don't have any plans for September 10th and 11th, plan a trip to Czech Republic! Red Hat Czech is organizing an open conference in Brno - Red Hat Developer Conference 2009. Conference is bringing presentations and hackfest sessions/hands-on labs for skilled users, admins and Linux and Java developers. The list of presentations has several interesting topics, mostly covered be people directly involved in upstream development of these particular projects. For example KDE4, talks about system config utilities rewrite, Gnome 3.0, lot of topics from JBoss group, talk about Systemtap and debuggers in general, details from RPM development etc. The full list of presentations is on the conference wiki page.

The plan is to base this event on the great success we had with FUDCon last year. In addition, plan is to extend the experience for hands-on lab (similar to hackfest session, little bit more prepared and organized). One of the hands-on labs will be focused on Power Management and tips'n'tricks how a programmer should thing about power consumption when writing an application.



Bookmark the link to its wiki page, more information will follow shortly - http://fedoraproject.org/wiki/DeveloperConference2009. See you all there!

Jun. 27th, 2009

FUDCon: Presentations at Friends for friends

FUDCon has started and presentations are running. The two I joined this morning in the Friends room were limited by missing projectors (we haven't realized that when putting up the session and we were not the only once surprised by that fact :-( ). As it turned out, the room name is Friends and the presentations were mostly for friends. Control Groups and Resource Management is very specific topic interesting mainly for people from large environments who have tasks like limiting resources for certain process/apss. One thing which appeared in the discussion was a possibility of using cgroups for upstart services and thus limiting resources for services and allow to start them in parallel with equal resources. Interesting idea.

Our presentation - Automated Bug Reporting Tool (Slides are here) was for a very small group of friends and few interested (and interesting) people. Lennart Poettering gaves us few interesting hints and seems that he's interested in gathering crashes from pulseaudio using abrt - that'd be great!

I'm heading back to some others talks, day is not over yet.

Jun. 23rd, 2009

Automated Bug Reporting Tool

One of the new Fedora 11 features is a project called ABRT (read "ABoRT") - an Automated Bug Repoting Tool - https://fedoraproject.org/wiki/Features/ABRT . Even though the name explains a lot there's still a lot to say about this cool tool. First thing - it's brand new and it's still work in progress. Some of the features are already working in Fedora 11, some of them are being implemented right now. The full list of features working in F11 and plans for 2.0 release is available at https://fedorahosted.org/abrt/wiki . Second thing - it needs testing and it needs interest from other maintainers and developers.

So how does it work? There' are already similar tools out there right? Like bug buddy - but wait, bug buddy is tight to gnome and it's not much useful for your apache or even kernel. Ok, so kernel has kernel oops .. it's nice and neat, but also just kernel specific. So the goal was to implement a framework which would work for all use cases - from kernel to desktop, from compiled code to scripting languages, and reporting bugs where ever you would like to have them. ABRT is the tool.

Now I can start talking about the architecture and plugins structure but I won't. I'd rather invite your for FUDCon in Berlin, which happens in few days and where I and Zdenek Prikryl, one of the ABRT developers, plan to talk about ABRT and show you the tool itself, but also how to tune it for your purpose and how to help us improving it. Stay tuned, we'll be on stage soon!

Nov. 1st, 2008

Linuxalt.cz - day #1

The Linuxalt conference today had surprisingly large audience. Aproximately 300 people showed up and that was way more than I expected. I'm glad that this kind of conference is still popupar and people are willing to spent whole weekend listening to very good presentations.


The first presentation of the day was about OpenMoko. Guys had three phones with different UIs and as a true fans of these phones talked apx 2 hours about all little details. And yes, with the recent Qt build you can even call! :-)

I also followed presentations about Real-time on Linux and Encrypted file system. Both presentations got huge audience and the room was full up! Big thanks to Milan and Michal who did a great job presenting those two topics and answering various question.


My quick presentation about Fedora 10 was the last one of the day - and I still got some audience paying attention :-)
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Oct. 28th, 2008

Getting ready for Linuxalt.cz

This weekend I'll be talking about Fedora 10 on LinuxALT - a local Linux conference, which is sponsored by Red Hat. If you have some time, you're around Brno/Czech Republic and you speak czech .. just stop by at FIT.VUT. The list of presentations is rather interesting and I'm looking forward for most of the talks.

My presentation has 6 slides so far - just a notes for all new features in Fedora 10 and I'm also writing the presentation on Fedora 10 Alpha. Hmm, it's so stable, that I'll probably drop all slides and just show the distro itself :-)
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Oct. 7th, 2008

FUDCon 2008 Brno - videos

Hi all!

Finally, presentations from the main lecture room on FUDCon 2008 in Brno are avaliable - check them out here http://fudcon2008brno.blip.tv/

It's been a great time and I hope to see all these guys again next year.
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