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User: d-rock

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Comments · 157

  1. Re:And occasionally referred to as... on 16,000 CWRU Computers Getting Gigabit Ethernet · · Score: 2

    Presti's kicks a$$. Except on Memorial day, when they're closed. That and Mama Santa's kept me alive on a student budget. How are other things up in CNS?

    Derek

  2. Squid as accelerator on Apache Bandwidth Limiting? · · Score: 2

    You could look at using a combination of content acceleration and bandwidth pools in squid. I've used these features before and it actually works pretty well for static content. You can tune the caching params to allow for large files, etc.

    Derek

  3. Interestin paper on Checksums, CRCs on UDP - Packet Loss in Real Life? · · Score: 4, Informative

    This is a very interesting paper on why things don't always work like we think they should...

    Derek

  4. Re:From MSDN... on Pet Bugs? · · Score: 2

    Actually,

    0,1,2,3,4 = 5 numbers
    5,6,7,8,9 = 5 numbers

    But that's beside the point...

    Derek

  5. Re:I have the same problem on Learning IPv6? · · Score: 2, Informative

    fe80 is a link-local address (i.e. your ethernet card). Your Ethernet card's MAC address is stored in the lower 64 bits of the address (54:ff:fe:6e:f6:c2). There's a lot of useful info at http://www.netbsd.org/Documentation/network/ipv6/.

    Derek

  6. No FP in kernel? on Porting Linux Software to the IA64 Platform · · Score: 1

    When I was reading the article, the part about no Floating Point in the Kernel stuck out for me. Is this an absolute, or a "don't do it, it's bad"? I looked at the Mossberg presentation on the IA-64 kernel and it looked like they were using some of the fp registers for internal state, but it didn't look like all of them.

    Derek

  7. Re:Antimatter? on World's Lightest Solid · · Score: 1

    I'm pretty sure they mean that if glass has density x g/cm^2 then this stuff has density (x/1000) g/cm^2.

    Derek

  8. Re:NULL pointers in C++ on ACT Release GTK Based Development Environment · · Score: 3, Informative

    You shouldn't dereference NULL because the kernel owns that memory and you'll get a segmentation fault (memory protection error):

    int main(int argc, char *argv[])
    {
    unsigned char *pointer;

    pointer = 0;

    *pointer = 1; // This will crash here with a SEGFAULT

    return 0;
    }

  9. STL Error Translator Here! on Downsides to the C++ STL? · · Score: 1

    http://www.bdsoft.com/tools/stlfilt.html
    Works pretty well, available for lots of compilers!
    The above example boils down to:

    BD Software STL Message Decryptor Release .99 for g++ (4/11/2002)
    readply.cpp(109): conversion from `iter' to non-scalar type `list' requested

  10. Re:A study in power management... on No More Rebooting? · · Score: 1

    I hope that switch isn't exposed to any malicious networks. That IOS version is vulnerable to the recent SNMP exploit and I don't think Cisco has a fix scheduled for it.

    http://www.cisco.com/warp/public/707/cisco-malform ed-snmp-msgs-pub.shtml

    Derek

  11. Re:Titanium is also very flexible. on The Sexiest Metal · · Score: 1

    I don't know what it is about Steve Jobs and metal cases... Weren't the NeXT cases machined magnesium?

    Derek

  12. JasPer Project (was Re:... a very good SDK) on JPEG2000 Coming Soon · · Score: 1

    The JasPer project also has some free code (BSDish license) that implements a portion of the standard. If you're looking for image compression we got very good performance out of the software. We compressed a 2kx3k 24-bit Targa from 36MB down to 250kB with very little degradation (OK, so it's subjective) in about 9 seconds on an 800MHz PIII.

    Derek

  13. Re:CCO (here is the link...) on T1: A Survival Guide · · Score: 2, Informative

    http://www.cisco.com/warp/public/116/t1_flchrt_mai n.html

    Flowcharts, etc. T1s are hard if you make them hard. Or if you use Bay routers :)

  14. Re:Until the industry settles, check out ACE/TAO on Java RMI · · Score: 1

    Just to clarify, TAO is The ACE ORB and it's strictly CORBA. TAO has some very nice features and ACE (ADAPTIVE Communication Environment) provides a very good set of wrapper facades for network/concurrent programming in C++. If you want Java, take a look at JacORB (http://www.jacorb.org) for a nice, simple ORB. Disclaimer: I'm a Graduate Student at wustl and some of my friends work in the DOC group (they write ACE/TAO).

    Derek

  15. Re:My take on JDK 1.4 on Java2 SDK v. 1.4 Released · · Score: 1

    Just as a comment, a lot of vendors -are- writing java apps. I actually use quite a few of them in my day-to-day work as a network engineer. Both of the major VPN vendors we've looked at use Java for the management consoles and some/most of the backend, and A lot of web interfaces (HP switches come to mind) have very nice Java Applet interfaces. Just because there isn't a Word clone out there written completely in Java (well, there probably is, somewhere) doesn't mean that people aren't using it. If C#/.Net is useful to people, great, but if it's roughly equivalent to Java then I'm going to choose Java. As much as I dislike some of what Sun has done with Java, on the whole they have contributed a pretty good system and I trust their (current) commitment to cross-platform functionality.

    Derek

  16. C# - Skinnable languages on What is .NET? · · Score: 1
    The best description of .Net's "Cross-Language" functionality came from the One Runtime to Rule them all:
    Playing with the .NET SDK, the cross-language support looks impressive, but the illusion holds true only until realizing that all languages in the mix are virtually identical. Microsoft has actually invented the concept of skinnable language : changing a language[base ']s most superficial aspects, and claiming the result to be a new language. There is only One True Language that is C#, and "skins" offered by Microsoft and third parties. Just like in GUIs, these skins will alter the system[base ']s look and feel, add a few features, but never compete with a fully new toolkit.
    Derek
  17. Package format on Linux Standard Base 1.1 · · Score: 5, Insightful

    How much does standardizing on RPM as the package format affect systems like Debian? From my understanding the whole apt (.deb) system has a lot of nice features that RPM doesn't... Not that it's a bad thing, I just wonder how much debate went into this particular aspect.

    Derek

  18. Suggestion for new contributions on The Return of Eric Weisstein's World Of Mathematics · · Score: 2, Insightful

    I would suggest that anyone who considers submitting to the new site uses "special" variable names, like
    crc = press * (sucks)^2, etc.

    Just a thought.

  19. Best of both worlds (Hybrid!!!) on Low-cost Reconfigurable Computing (FPGA's) · · Score: 1

    As many here have already noted, FPGAs cannot yet approach the complexity of current processors, yet current processors lack some basic (and very useful) features of FPGAs. Perhaps the best way to leverage the strengths of both would be to embed a small FPGA in processors that is controlled (bitfile, I/O, etc) from the cpu itself. That way, if you had need for say, a priority encoder or massively parallel ALU, you just load a module into the onboard CPU and away you go. This would eliminate one of the biggest bottlenecks for off-board FPGA coprocessors (memory bandwidth) and limit the complexity of the implementation. I'm taking a FPGA design course right now and you'd be amazed what you can do in 10-20k gates. Anyone else have any experience in this area?

    Derek

  20. More bad news on World Trade Towers and Pentagon Attacked · · Score: 1

    At least one, possibly both towers have collapsed. I hope they were able to evacuate the towers before it happened. I also hope that emergency crews in the area weren't injured.

  21. Re:So, what was the problem...? on Blow-by-Blow Account of the OSDN Outage · · Score: 1

    The key is that their "redundant" Supervisor modules weren't. I didn't even know you could do that with Sups on a 6500 (share VLANs). My understanding is that only one is active at any given time. Is this right?

    Derek

  22. Re:You bring up a good point on Why Unicode Won't Work on the Internet · · Score: 1

    Just a comment on the "Straight Dope". I don't know if the info on the Chinese Typewriter was valid several years ago, but I know it's no longer true. Both Chinese and Japanese keyboards have multiple glyphs on each key, because both Chinese and Japanese have phonetics syllabaries (alphabets). In Chinese, it's Pinyin, in Japanese it's Katakana or Hiragana (same sounds, slightly different drawings). Either way, you input complex characters using multiple keystrokes, but not in english characters.

    So, for instance, "Flower" in Japanese is pronounced "hana". That is two characters, "ha" and "na". If you type ha-na I think you will see a menu pop up with possible Kanji (pictographs) and you can choose from them. I have only used a chinese keyboard but I assume it's very similar.

    Derek

  23. Replacing the software? on Diskless Linux Kiosks · · Score: 1

    It looks like the just boot off of the CD, so how hard would it be to burn a CD with Linux that used NFS mounts and X to turn this into a real X terminal or even something else. This seems like a pretty easy hack to make it do whatever you want...

    Derek

  24. Re:Routers and Optical Burst Switching on Multiterabit Switching, No Moving Parts · · Score: 1

    For anyone interested, take a look at some of the work at Washington University. The Applied Research Lab is doing some really cool work here on optical burst switching.

    Derek

  25. Why the link? on Stormix Technologies Shut Down · · Score: 1

    If the web site is down, what's the point of putting a link to the site in the story?

    Derek