fidzu : computers

On Saturday night in New York City a power outage struck Midtown Manhattan, hitting Hell's Kitchen north to Lincoln Center and from Fifth Avenue west to the Hudson River. The blackout darkened the huge, electric billboards of Times Square, forced Broadway shows to cancel performances, and even disabled some subway lines. But what caused it? From a report: According to reports, the outage was caused by a transformer fire within the affected region. Power was fully restored by early the following morning. [...] Saturday's blackout was most likely caused by a disabled transformer at an area substation. There are at least 50 of those in New York City, which are fed in turn by at least 24, higher-voltage transmission substations. When it comes to power, New York is unusual because of the city's age and the density of its population, both residential and commercial. That produces different risks and consequences. In Atlanta, where I live, storms often down trees, which take out aboveground power lines. In the West, where wildfires are becoming more common, flames frequently dismantle power infrastructure (sometimes the power lines themselves cause the fires). But across the whole of New York City -- not just Manhattan -- more than 80 percent of both customers and the electrical load are serviced by underground distribution from area substations. That makes smaller problems less frequent, but bigger issues more severe. When a transformer goes down in a populous place like Manhattan, it has a greater impact than it would on Long Island, say, or in Westchester County, where density is lower. The amount of power that central Manhattan uses on a regular basis also contributes to that impact. Times Square, the theater district, hundreds of skyscrapers -- it's a substantial load. In New York's case, supplying that load is not usually the problem. Generating facilities can be located near or far away from where their power is used, and New York City draws power from a couple dozen plants. Some of it is imported from upstate. But much of New York's power is still generated locally, in large part at plants along the waterfront of Queens. Those plants are older, and more susceptible to disruption from local calamities, especially severe weather. When peak demand surges -- most common during heat waves, such as the ones that struck the region in 2006 and 2011 -- the older, less efficient generating stations have a harder time keeping up, and brownouts or blackouts become more likely. [...] But new risks associated with climate change, cyberwarfare, and other factors haven't necessarily been accounted for in the design and operation of utility infrastructure. The perils build on one another. Climate change amplifies the frequency of heat waves, which increases electrical load, which puts greater pressure on infrastructure. At the same time, it increases the likelihood of superstorms that can cause flooding, fire, and other disasters that might disrupt nodes in the network. When utility operators designed their equipment years or decades ago, they made assumptions about load, storm surge, and other factors. Those estimates might no longer apply.

Read more of this story at Slashdot.

16 Jul 2019 6:04pm GMT

Rhode Island is one of about a dozen states that prohibit the release of 911 recordings or transcripts without the written consent of the caller or by court order. The goal generally is to protect the privacy of callers in what may be one of the most stressful moments of their lives. From a report: But Rhode Island's restrictive law also keeps families in the dark about how the state's 911 system has responded to calls involving their loved ones, and it has left the public oblivious to troubling gaps in how the system is performing, according to an investigation by The Public's Radio and ProPublica. In March, the news organizations reported on the 2018 death of a 6-month-old baby in Warwick after a Rhode Island 911 call taker failed to give CPR instructions to the family. The lapse came to light after a family member who took part in the 911 call requested a copy of the recording. In June, the news organizations reported on the death of Rena Fleury, a 45-year-old woman who collapsed while watching her son's high school football game in Cumberland last year. Four unidentified bystanders called 911. But none of the 911 call takers recognized that Fleury was in cardiac arrest. And none of them instructed the callers to perform CPR. The 911 recordings for Fleury were never made public. An emergency physician who treated Fleury testified about what happened during a state House committee hearing in March. Across the country, recordings of 911 calls for accidents, medical emergencies, mass shootings and natural disasters have provided insight into the workings of public safety systems and, in some cases, revealed critical failings.

Read more of this story at Slashdot.

16 Jul 2019 5:25pm GMT

Plus there's a weird feature that we can't explain at this point.

16 Jul 2019 5:07pm GMT

Microsoft's cute, polished answer to Pokemon Go is interesting, but unfinished.

16 Jul 2019 5:00pm GMT

US mobile network operator Sprint said hackers broke into an unknown number of customer accounts via the Samsung.com "add a line" website. From a report: "On June 22, Sprint was informed of unauthorized access to your Sprint account using your account credentials via the Samsung.com 'add a line' website," Sprint said in a letter it is sending impacted customers. "The personal information of yours that may have been viewed includes the following: phone number, device type, device ID, monthly recurring charges, subscriber ID, account number, account creation date, upgrade eligibility, first and last name, billing address and add-on services," the US telco said. Sprint said the information hackers had access to did not pose "a substantial risk of fraud or identity theft," although, many might disagree with its assessment. The company said it re-secured all compromised accounts by resetting PIN codes, three days later, on June 25.

Read more of this story at Slashdot.

16 Jul 2019 4:45pm GMT

The federal tax credit for Tesla vehicles declined by $1,875 on July 1.

16 Jul 2019 3:30pm GMT

The Event Horizon Telescope (EHT) - a planet-scale array of 8 ground-based radio telescopes and part of an international collaboration - captured the first image of a black hole. On April 10th 2019, EHT researchers disclosed the first direct visual evidence of a supermassive black hole in the heart of the Galaxy Messier 87.

26 Apr 2019 2:32am GMT

ie können sagen, dass die Spracherkennung die Zukunft des Tippens ist, da sie Ihnen hilft, schneller zu schreiben, selbst für diejenigen, die nicht in der Lage sind zu schreiben. Spracherkennungssoftware und -service sind sowohl für Computer als auch für mobile … Weiterlesen →

06 Mar 2019 3:07pm GMT

Windows 10 ist in vielerlei Hinsicht eine deutliche Verbesserung gegenüber früheren Versionen - aber es kann sich auch langsam und träge anfühlen, wenn es nicht richtig konfiguriert ist. Von den vielen Möglichkeiten, die Leistung von Windows 10 zu verbessern, gibt … Weiterlesen →

06 Mar 2019 2:33pm GMT

Socrates couldn't have been more right when he said: "I know one thing, that I know nothing." Even with all of the advancements we, as a species, have made in this world, it's still nothing compared to countless of wonders waiting to be discovered in the vast universe. If you've recently developed an interest in ... Read more

04 Nov 2018 1:27pm GMT

Well, it's hanging on in there, but why didn't it conquer the world?

Analysis Does European Commissioner for Competition Margrethe Vestager's team pay close attention to the tech news? If not, perhaps they should.…

19 Oct 2016 10:24am GMT

Linus Torvalds teaches devs a lesson with early rc1 release

Google may have killed off its modular smartphone Project Ara idea, but some of the code that would have made it happen looks like coming to the Linux Kernel.…

17 Oct 2016 6:58am GMT

Your weekly Windows entertainment large and small

This week's worldwide BSOD roundup starts with what looks to your writer like a virtualisation launch bug. Submitter Alexander tells us it came from Peterborough Station, in Cambridgeshire.…

17 Oct 2016 6:28am GMT

Die Copy Trader ist die einfache und innovative Art und Weise , Geld online mit Forex Trading zu verdienen. Es ist ein gültiges und weithin bewährte System , gefolgt von vielen kleinen Investoren auf der ganzen Welt. Leider ist in … Weiterlesen →

21 May 2016 4:05pm GMT

On Sunday, May 20th 2012, people in a narrow strip from Japan to the western United States will be able to see an annular solar eclipse, the first in 18 years. The moon will cover as much as 94% of the sun. An Annular Solar Eclipse is different from a Total Solar Eclipse, when the ... Read more

20 May 2012 9:51pm GMT

It's Wednesday, which means another Deck of Cards workout, the fun yet challenging segment of our group exercise program, The Lifehacker Workout. More »

10 Nov 2011 1:15am GMT

Readers offer their best tips for previewing your iPad home screen from another app, troubleshooting your friends and family's computers from far away, and accessing Google Tasks in the new Gmail layout. More »

10 Nov 2011 1:00am GMT

Facebook recently changed its layout, no longer allowing you to choose between "top stories" and "most recent" stories. Due to user outcry, however, they announced today that they'll be changing it back, though you might not notice it at first. Here's how it works. More »

10 Nov 2011 12:30am GMT

To anyone who has been reading anything on the web over the past few months, this shouldn't come as a surprise. Barnes & Noble is currently embroiled in a patent lawsuit started by Microsoft, after the bookseller/tablet maker refused to pay protection money to Redmond. Barnes & Noble has now openly said what we already knew, and has filed an official complaint at the US Department of Justice: Microsoft is engaging in anticompetitive practices.

09 Nov 2011 4:13pm GMT

"Sources close to Adobe that have been briefed on the company's future development plans have revealed this forthcoming announcement to ZDNet: Our future work with Flash on mobile devices will be focused on enabling Flash developers to package native apps with Adobe AIR for all the major app stores. We will no longer adapt Flash Player for mobile devices to new browser, OS version or device configurations.. . ."

09 Nov 2011 6:34am GMT

"The following are major features for Fedora 16: enhanced cloud support including Aeolus Conductor, Condor Cloud, HekaFS, OpenStack and pacemaker-cloud; KDE Plasma workspaces 4.7; GNOME 3.2; a number of core system improvements including GRUB 2 and the removal of HAL; an updated libvirtd, trusted boot, guest inspection, virtual lock manager and a pvops based kernel for Xen all improve virtualization support."

08 Nov 2011 10:45pm GMT

Tyrs is a microblogging client, supporting Twitter and Status.net (identi.ca), it's based on console using the NCurses module from Python. The release of the 0.5.0 version is a good excuse to introduce Tyrs. Tyrs aims to get a good interaction with a fairly intuitive interface that can provide support ncurses. Tyrs tries also not to [...]

06 Nov 2011 9:43pm GMT

After one year of managing a network of 10 servers with Cfengine I'm currently building two clusters of 50 servers with Puppet (which I'm using for the first time), and have various notes to share. With my experience I had a feeling Cfengine just isn't right for this project, and didn't consider it seriously. These servers are all running Debian GNU/Linux and Puppet felt natural because of the good Debian integration, and the number of users whom also produced a lot of resources. Chef was out of the picture soon because of the scary architecture; CouchDB, Solr and RabbitMQ... coming from Cfengine this seemed like a bad joke. You probably need to hire a Ruby developer when it breaks. Puppet is somewhat better in this regard.

Puppet master needs Ruby, and has a built-in file server using WEBrick. My first disappointment with Puppet was WEBrick. Though PuppetLabs claim you can scale it up to 20 servers, that proved way off, the built-in server has problems serving as little as 5 agents/servers, and you get to see many dropped connections and failed catalog transfers. I was forced to switch to Mongrel and Nginx as frontend very early in the project, on both clusters. This method works much better (even though Apache+Passenger is the recommended method now from PuppetLabs), and it's not a huge complication compared to WEBrick (and Cfengine which doesn't make you jump through any hoops). Part of the reason for this failure is my pull interval, which is 5 minutes with a random sleep time of up to 3 minutes to avoid harmonics (which is still a high occurrence with these intervals and WEBrick fails miserably). In production a customer can not wait on 30/45 minute pull intervals to get his IP address whitelisted for a service, or some other mundane task, it must happen within 10 minutes... but I'll come to these kind of unrealistic ideas a little later.

Unlike the Cfengine article I have no bootstrapping notes, and no code/modules to share. By default the fresh started puppet agent will look for a host called "puppet" and pull in what ever you defined to bootstrap servers in your manifests. As for modules, I wrote a ton of code and though I'd like to share it, my employer owns it. But unlike Cfengine v3 there's a lot of resources out there for Puppet which can teach you everything you need to know, so I don't feel obligated to even ask.

Interesting enough, published modules would not help you get your job done. You will have to write your own, and your team members will have to learn how to use your modules, which also means writing a lot of documentation. Maybe my biggest disappointment is getting disillusioned by most Puppet advocates and DevOps prophets. I found articles and modules most of them write, and experiences they share have nothing to do with the real world. It's like they host servers in a magical land where everything is done in one way and all servers are identical. Hosting big websites and their apps is a much, much different affair.

Every customer does things differently, and I had to write custom modules for each of them. Just between these two clusters a module managing Apache is different, and you can abstract your code a lot but you reach a point where you simply can't push it any more. Or if you can, you create a mess that is unusable by your team members, and I'm trying to make their jobs better not make them miserable. One customer uses an Isilon NAS, the other has a content distribution network, one uses Nginx as a frontend, other has chrooted web servers, one writes logs to a NFS, other to a Syslog cluster... Now imagine this on a scale with 2,000 customers and 3 times the servers and most of the published infrastructure design guidelines become laughable. Instead you find your self implementing custom solutions, and inventing your own rules, best that you can...

I'm ultimately here to tell you that the projects are in a better state then they would be with the usual cluster management policy. My best moment was an e-mail from a team member saying "I read the code, I now understand it [Puppet]. This is fucking awesome!". I knew at that moment I managed to build something good (or good enough), despite the shortcomings I found, and with nothing more than using PuppetLabs resources. Actually, that is not completely honest. Because I did buy and read the book Pro Puppet which contains an excellent chapter on using Git for collaboration on modules between sysadmins and developers, with proper implementation of development, testing and production (Puppet)environments.

05 Nov 2011 11:17pm GMT

Creating json is now ten times easier.

05 Nov 2011 3:10am GMT