Welcome to the Slashdot Beta site -- learn more here. Use the link in the footer or click here to return to the Classic version of Slashdot.

Thank you!

Before you choose to head back to the Classic look of the site, we'd appreciate it if you share your thoughts on the Beta; your feedback is what drives our ongoing development.

Beta is different and we value you taking the time to try it out. Please take a look at the changes we've made in Beta and  learn more about it. Thanks for reading, and for making the site better!



Feature Phone Hack Can Block Calls, Texts On Some Networks

Errtu76 Re:first useless reply! (39 comments)

Also, I found out that if you're in a train and sit close enough to the engineer(? the person who operates the train ..) and switch on the jammer while the train is at the station, the train won't move anymore because you're blocking the signal used by the train to communicate with the station. Was kind of funny at first, but then too many people came in asking questions and being upset ... Also, I was getting late for work and people complaining about their phone not working was worse than when they were quietly texting.

1 year,21 days

Snowden Gave 15,000 Documents to Glenn Greenwald; Obama Cancels Russia Summit

Errtu76 Re:Screw You Obama (531 comments)

I'm almost tempted to figure out where the option to unhide your signature is

about a year ago

Google's Crazy Lack of Focus: Is It Really Serious About Enterprise?

Errtu76 Re:All of them. (226 comments)

Indeed. Take for example my startpage iGoogle, which is now going to be abandoned. And they have the nerve to shut it down with only 1.5 years prior warning. Bastards.

about a year ago

Pi to Go: Hot Raspberry Pi DIY Mini Desktop PC Project

Errtu76 Re:Pi Madness (134 comments)

Not to mention a chance of finding some interesting data on those discarded harddrives.

about a year ago

Google Drops XMPP Support

Errtu76 universal linux client? (416 comments)

So after removing my MSN account from Pidgin, I can now remove my Google Talk account? Great, so only a private Jabber server remains. Unless I'm willing to have 3 separate IM clients running ... Bah. Anyone knows of a universal Linux client that can handle at least skype and jabber?

about a year ago

The Raspberry Pi Turns One

Errtu76 happy birthday! (81 comments)

/me queues Kool and the Gang - Celebration ..... on mpd that runs on this r-pi

What an amazing piece of hardware!

about a year and a half ago

Fedora 18 Installer: Counterintuitive and Confusing?

Errtu76 Re:I must agree (458 comments)

Fedora is made by a group of people, some working for RH, some not.

about a year and a half ago

Indiana Nurses Fired After Refusing Flu Shots On Religious Grounds

Errtu76 nonsense (851 comments)

Flu shots are a hoax. I've worked in a hospital where about half of the people chose to have the flu shot. Most of them got sick immediately afterwards and there was no evidence that having taken the shot, would prevent them from getting the flu later that year. People who never took the shot got sick just as much as the people who did.

about a year and a half ago

Former Leader of Film Piracy Group Sentenced To Five Years In Prison

Errtu76 Good luck! (183 comments)

I remember getting quite a few releases from IMAGiNE back in the days where I still had lots of FTP accounts. Nowadays I don't really know/care who releases it as I just grab it from usenet.

about a year and a half ago

Hackers' 'Zero-Day' Exploits Stay Secret For Ten Months On Average

Errtu76 Re:Free software vs. proprietary? (74 comments)

Perhaps it's your nick that triggers those responses.

about 2 years ago

To Encourage Biking, Lose the Helmets

Errtu76 Here in Holland (1651 comments)

Over here in Holland, we rarely see people wearing such helmets. Actually the only ones who wear them are some children, and that's only because they tend to be more reckless and/or can't estimate the dangers too well. After the age of 8-9, they too stop wearing them. Almost everybody here knows how to ride a bike and if you see how we do that; driving through busy traffic, together with cars, buses etc. on the same lane, all without helmets. Sure, accidents happen, but I can't remember one incident where a helmet would've proven useful. Most of the times a protective suit like you wear on a motorcycle would've been better :)

about 2 years ago

The History of the Floppy Disk

Errtu76 Re:Read Error (204 comments)

Yep. I also remember paying close to 20 guilders (let's see .. that's about 8 euro .. or 9-10 dollars?) for a 650M CD recordable. Not to mention the re-writables that costed me twice that amount.

about 2 years ago

Ask Slashdot: Best VPN Service For Australia?

Errtu76 Re:What's the best VPN that can be use _anywhere_ (138 comments)

Yep. This is how I connect to things if I'm on a public network. Just 'ssh your-host -D 1080' , configure your firefox/whatever to use a SOCKS proxy on port 1080 and you're good to go.

about 2 years ago

In Brazil, All Vehicles Must Have Radio IDs By 2014

Errtu76 let me say (161 comments)

Boa sorte!

more than 2 years ago

Ask Slashdot: Best On-Site Backup Plan?

Errtu76 Re:Gluster (326 comments)

Gluster can't be told where to store something. So even in a gigantic cluster you still run into the problem that 2 duplicates of a file can be located on two storage nodes that are physically near to eachother. Let's say right where your fire begins ..

more than 2 years ago

Debian Changes Default Desktop From GNOME To XFCE

Errtu76 you're kidding me .. on a CD? (328 comments)

Pfff .. fitting on a CD, how last century.

more than 2 years ago

Microsoft Apologizes For Inserting Naughty Phrase Into Linux Kernel

Errtu76 Re:Who let MS submit commits anyway (897 comments)

Some dude called L. Torvalds let that through IIRC. He's probably new, cut him some slack.

more than 2 years ago

Microsoft Apologizes For Inserting Naughty Phrase Into Linux Kernel

Errtu76 Re:Humor (897 comments)

Exactly. Just leave the stupid code in or make it something like B166357B00B135

more than 2 years ago



Stephen Hawking to give up academic title

Errtu76 Errtu76 writes  |  more than 5 years ago

Errtu76 (776778) writes "The BBC news site reports that professor Stephen Hawking is to give up a prestigious academic title. The physicist, who has motor neurone disease, will give up his position as Cambridge University's Lucasian Professor of Mathematics next year."




Errtu76 Errtu76 writes  |  more than 6 years ago

Woohaa! I got myself a Beowulf cluster! 20 nodes of 2GHz P4's using Open-MPI. Cool. .. So what do i do with it now that i can call myself a Beowulf administrator? No idea. I don't even know if what i have now can be called a Beowulf. I thought that since this is so popular amongst geeks, there would be a plethora of documentation available, but almost all links point to the original Beowulf documentation which is just a description of how things should look like. No tutorial or practical examples. After a long search i came to the conclusion that any cluster can be called a Beowulf if it uses some form of MPI (Message Passing Interface). Now that i got this running i thought about compiling a test program that came with the open-mpi package called pi.c. An extremely simple program that calculates pi using several nodes/cpu's. Except that the more nodes i specify, the longer the calculation takes. Uhm, i don't know much (if anything) about HPC, but i don't think this is supposed to happen. Today i have more time to play with my cluster. I can either setup Hadoop on it now since the whole idea is to make a PoC on clustered filesystems, or i can try to see if i can compile something useful using MPI. Decisions decisions ...


Clustered file systems

Errtu76 Errtu76 writes  |  more than 6 years ago

We're currently experimenting with clustered file systems. In the running to become our selling products are GlusterFS and Hadoop. The first because of its flexibility and easiness of setting it all up, the latter for the sheer fact that large companies are already using it and on paper it looks very slick. Hadoop only has the drawback of requiring java which in turn means the relatively cheap nodes suddenly become more expensive since we have to buy more ram.

GlusterFS should be able to support striping over AFR (automatic file replication) and thus supply a good mix between performance and reliability but so far i'm unable to produce a working configuration for this. The only setup i'm using right now is a 20-node cluster which contains 10 AFR pairs and are clustered with Unify. Even over GigE this performs quite well. I don't see any performance increase with the various optimizers yet. I have tried all but the 'boost' optimizer, so that's still worth a shot. Also some days ago 1.3.10 was released which fixes a hang bug when pulling out an AFR node. I'm not sure if this will fix the overwrite bug then, as i had to use the latest mainline 2.5 version for that fix.

Hadoop will be tested next week if all goes well. It will be just a matter of taking out the 256M RAM modules from 10 nodes and placing them in the other half, so java should have enough. Why one would develop such a system in java is beyond me, but then again, i'm not a developer so they must have had good reasons to do so.

Why am i typing all this? I don't know. Go see if reading this made you feel sad.

Slashdot Login

Need an Account?

Forgot your password?

Submission Text Formatting Tips

We support a small subset of HTML, namely these tags:

  • b
  • i
  • p
  • br
  • a
  • ol
  • ul
  • li
  • dl
  • dt
  • dd
  • em
  • strong
  • tt
  • blockquote
  • div
  • quote
  • ecode

"ecode" can be used for code snippets, for example:

<ecode>    while(1) { do_something(); } </ecode>