3Nov/110

Facebook “Open Compute” Server tested by Anandtech

Facebook designed an AMD and an Intel motherboard - all manufactured by Quanta. Their main aim was to make more efficient and cheaper servers: “The result is a data center full of vanity free servers which is 38% more efficient and 24% less expensive to build and run than other state-of-the-art data centers.” The efficiency of the voltage regulators: 94%. Everything was removed, that was not absolutely necessary: the motherboards have no BMC, very few USB (2) and NIC ports (2), one expansion slot, and are headless (no videochip).

Facebook had 22 Million active users in the middle of 2007; fast forward to 2011 and the site now has 800 Million active users, with 400 million of them logging in every day. Facebook has grown exponentially, to say the least! To cope with this kind of exceptional growth and at the same time offer a reliable and cost effective service requires out of the box thinking. Typical high-end, brute force, ultra redundant software and hardware platforms (for example Oracle RAC databases running on top of a few IBM Power 795 systems) won’t do as they're too complicated, power hungry, and most importantly far too expensive for such extreme scaling. (quoting Anandtech)

"The AMD servers are mostly used as Memcached servers, as the four channels of AMD Magny-cours Opterons 6100 are capable of using 12 DIMMs per CPU, or 24 DIMMs in total. That works out to 384GB of caching memory."

It remains unclear, when or if that server hardware will be available for purchase - but it looks like there will be some cloud/datacenter providers jumping on the idea of the open compute servers, so it might be possible to rent them.

15Aug/110

Comparison: Canon Camera Roundup for Pro-DSLR Video

Since lot of people ask me, which (photo) cameras to buy which also work for filming, here is a short roundup of cameras that I find worth mentioning. All of the cameras mentioned will work with Magic Lantern:

  • On-screen audio meters
  • Manual gain control with no AGC
  • Zebra stripes (video peaking)
  • Custom Cropmarks for 16:9, 2.35:1, 4:3 and any other format
  • Control of focus and bracketing
  • (among other changes, such as Video-Bitrate setting)


    Price/Value/Feature Comparison

    Canon Rebel T1i
    Canon EOS 500D

    Canon Rebel T2i
    Canon EOS 550D

    Canon Rebel T3i
    Canon EOS 600D

    Canon EOS 60D
     
    Canon EOS 5D MKII
     
    500d 60d 550d 60d 5dmkii
    USA: $579.90

    Europe: 449.00€ (used)
    USA: $629.00

    Europe: 549.99€
    USA: $699.95

    Europe: 646.99€
    USA: 1,029.00$

    Europe: 879.00€
    USA: 2,499.00$

    Europe: 1,890.00€
    The Revel T1i was a great camera, although we cannot recommend it, since its successor is the 550D and the 600D. If you can get a cheap second hand alternative at ebay, you might get a deal, though. (Seen on ebay for $199 used) The 550D is a great camera, although the 600D beats it in price/value. If you can get your hands on a cheap second-hand 550D, you might be able to even save some more bucks. (Seen on ebay for $399 used) The 600D is our definite winner in price/value: feature-rich, reasonably priced, enjoyable to use and, most importantly, takes great pictures. It's relatively small, but is fully supported by Magic Lantern and you should be really happy with that camera if you use good lenses and fast Compact Flash Cards. The 60D is a great camera, although almost in the same range as the 7D (which has no Magic Lantern support yet). If you are only shooting photos, go for the 7D - if you are doing video, save some bucks and go for the 600D. Invest the spare money in good lenses. The best of all the cameras compared, if we leave out the price. While this is also the most pricy camera, it certainly gets beaten by the 600D when it comes to price/value. The Canon EOS 5D MKII is the best camera for digital video out there, although with the 600D and with fast enough SDXC cards, you will almost match the quality of the 5D MKII.

    Conclusio: get the 600D if you need to save money, get the 5D MKII if you have some spare 3000$. Invest in good lenses, such as the Canon EF 24-105mm f/4 L IS USM, even if you are using it on the 600D (it will get converted to a 38-168mm, though). The Canon EF-S 55-250mm f/4.0-5.6 IS is a cheap but quite good alternative. Make sure you get a really fast SDXC card, since you will want to increase the Video Bitrate with Magic Lantern to make your videos quality increase as well. Recommendation: the Lexar Media 64 GB SDXC Flash Memory Card LSD64GCRBNA133 stores 64GB (!) and is blazingly fast.

  • 12Mar/1113

    Apple MacBook Pro Quad Core (early 2011) i7: fast powerhorse with design flaws and hardware issues

    Apple gets sloppy: too much thermal paste on the early 2011 MacBook Pro

    While the new Apple MacBook Pro Machines are really fast desktop-like speed packed monsters, it seems like they also have severe hardware design faults as outlined by zdnet and ifixit. With a geekbench score over 10.000 the new MacBook Pro (early 2011) beats the Mac Pro (Early 2009) Intel Xeon W5590 3.33 GHz (4 cores). All the good talk and benchmarks cannot make up for the current problems Apple users are facing with their brand new machines:

    Come on Apple, wake up and fix those machine fast, as lots of us could benefit from a stable quad-core laptop solution (talking audio plugs and realtime audio performance).

    We can recommend to tell apple to send the replacements before they pick up the faulty machines, so it is easier to transfer the data already on it. (apple care even suggested it this way)

    [UPDATE] Gregg Keizer from Computerworld also writes about quality concerns regarding the new Apple Notebooks and there is also a discussion about actual "Overheating" going on in the Apple Forums. Well, I can confirm the issue exists and the current MacBook Pro Models freeze a lot. If it is a hardware, software or firmware issue remains unclear.

    [UPDATE] There is a macrumors forum thread discussing that there were issues with the 2010 MBPs as well when they came out. Another thread at macrumors forum tries to sort out if it is a hardware or software issue.
    Some people suspect it is related to internal graphics switching, but there really seems to be something going on since also reports on the apple discussion forums are increasing.

    [UPDATE] as of 2011/03/14 macrumors suggest in their forum to "go 2010 or wait for ivy bridge". The early 2011 version of the MacBook Pro das 45W TDP vs. last generation's 35w. That's a big increase which automatically makes the whole series go louder and more hot than the 2010 model.

    [UPDATE] 2011/03/21: Macrumors posted a story: "2011 MacBook Pros Crashing Under Load?"

    [UPDATE] 2011/03/21: Mac OSX 10.6.7 Update was just announced by Apple. Unfortunately, on the two machines we have here, the update does not fix anything related to CPU temperature. Still there are frequent freezes as well.

    [UPDATE] 2011/03/22: dailytech confirms that New MacBook Pros Freezing When Stressed, Update Adds More Problems

    [UPDATE] 2011/03/28: we received our two replacement MacBook Pros. They don't seem to have any issues and also still did not freeze on us! Also the fans are not spinning like crazy anymore! For all people affected by any of the issues reported above: get your Notebooks replaced! Apple is aware of the issues and replaces faulty hardware (we had to wait for two weeks though).

    [UPDATE] 2011/04/23: the current Systems freeze 2-3 times a day. Not all the issues seem to be solved! You should definitely get a late 2010 model, if you need a highly stable system!

    [UPDATE] 2011/11/01: Apple replaced one of our 15-inch MBP MC721LL/A machine and the freezes are not appearing anymore. Reports from other users that bought an early 2011 model are positive, so currently the advice would be to get a refurbished Apple MacBook Pro MC721LL/A 15.4-Inch Laptop even before getting a MD318LL/A 15.4-Inch (late 2011) version, not only because of saving some bucks, but also since the Apple MacBook Pro early 2011 performs better in most of the situations compared to the late 2011 version.

    Besides the heating issues, there are also reported "intermittent flickering, brief blackouts and other periodic but noticeable flaws" reported in the Apple Discussion Forums. We are getting replacement Machines - let's see if there is any improvement after the first round of shipping!

    23Nov/094

    Max/Msp for Live with Ableton Live 8.1 Final REVIEW (max for live)

    This is a review of „max for live“ using Ableton Live 8.1 FINAL and max/msp 5.1 on a Mac OSX 10.5.8 Core2Duo Intel MacBook Pro. As I am a frequent user of all kinds of visual DSP systems for quite a while now: pure data (PD), max/msp, vvvv, nord modular OS, etc. - so I am quite dazzled what max for live has to offer. (Read the full Entry to see the Review)

    maxforlive_toolbox.png

    Instruments, Audio Effects, Midi Effects - but of course, this is not all of the cake. Imagine you can create user-interface elements however you please and also assign MIDI to that interface parts. This brings Ableton Live huge steps forward: the possibility to extend ableton to include a full featured audiovisual prototyping environment and to interface with the world: be it sensors, webservices or other Ableton Live installations.