Slashdot Mirror


User: rwa2

rwa2's activity in the archive.

Stories
0
Comments
2,471
First seen
Last seen
Profile
(view on slashdot.org)

Comments · 2,471

  1. Not enough Tomato love in this thread on Open Source Router To Replace WRT54GL? · · Score: 1

    http://www.polarcloud.com/tomato

    Made my WRT54G v4 perform well enough (compared to stock / HyperWRT) that I didn't need a new router to keep up with my 25Mbps FiOS uplink

  2. Re:Sorry, but.. on Open Source Router To Replace WRT54GL? · · Score: 1

    I got a nice speed boost on my even older WRT54G just by upgrading from HyperWRT to Tomato. It now let me max out my 25Mbps FiOS link, whereas it was stuck at 15-20Mbps before.

    I haven't heard anything all that great about 802.11n yet as far as range and performance goes. Don't mind using wires for performance-critical stuff either. Maybe someday...

  3. Re:Good on HTC on HTC Walks From Palm Bid, Will Lenovo Step Up? · · Score: 1

    Yeah, I'm still using my Palm TX since I haven't seen anything better yet :P Android has a crappy address book. N900 doesn't have GMM. iPhone comes with the Apple straightjacket.

    Waited for the Palm Pre, but they tried too hard to be like apple - with the lack of SD card and their following suit with the the restrictive app store.

  4. Re:Doesn't that get old? on Google Backpedals On Turn-By-Turn GPS For iPhone · · Score: 1

    Well, the GMM nav voice does sound pretty sexy. Even bordering on pornographic, I might say.

  5. Re:Ignorance abounds indeed on Google Street View Logs Wi-Fi Networks, MAC Addresses · · Score: 1

    Hmm, good to know... though still not sure if that assures any more privacy.

    Of course even IPv4 is barely anonymous... since with dynamically-assigned IPs they could still go back to your ISP and ask who was using it at that time.

    But traceability is part of transparency, right? :P

  6. Re:I don't get it on Software SSD Cache Implementation For Linux? · · Score: 1

    I was under the impression that most of the improvement from using the RedHat "background readahead" optimizer comes from reordering lots of small reads by their physical position on disk, so that the drive head can just do one sweep to load the data, rather than jumping back and forth (adding seek latency). Also, it might have a small chance of improving hits to the drive's internal readahead cache. But I don't think either of those would really apply to an SSD.

    True, block reads would be faster than lots of small reads, but the only way to do that to lots of small files would be to group them together into a special package... like maybe through judicious use of squashfs or something similar.

    But yeah, it would be awesome if someone managed to work out how to do the latter... ideally during bootup the hard disk should be pegged at full read speed until everything it needs from disk is loaded. It would call for a lot of stripping out of files that weren't accessed, though.

  7. Re:Ignorance abounds indeed on Google Street View Logs Wi-Fi Networks, MAC Addresses · · Score: 1

    Do you know anything about networking? The MAC of the AP/router does not face the interwebs. If it's an AP it will be connecting through another cable/DSL/T1/whatever that has its own MAC address. If it's a router the WAN port will have a different MAC address than the WLAN.

    Meh, to be fair that should change if we ever finish migrating to IPv6, which should include MAC addresses.

    I'm more worried about the personally identifiable information my cell phone company's been collecting about me and my whereabouts from my handset. Which is to say not very much.

  8. Benchmarking file system performance on Software SSD Cache Implementation For Linux? · · Score: 1

    Does Linux cache actual data (content of files) or just the block addresses?
    As far as I know, only the second.

    It caches both.

    Some fun things to try by way of benchmarks:

    sync; sudo sh -c "echo 2 > /proc/sys/vm/drop_caches" # clear out the file cache
    time find /usr/share/doc -type f > files # uncached file system performance
    time cat `cat files` > /dev/null # uncached data read performance
    time find /usr/share/doc -type f > files # cached file system performance
    time cat `cat files` > /dev/null # cached file system + data performance
    sync; sudo sh -c "echo 2 > /proc/sys/vm/drop_caches" # clear out the cache again
    time cat `cat files` > /dev/null # uncached performance for both data and inodes

    As long as you don't overrun your available cache memory, you should get at least 100x faster performance on cached accesses.

  9. Re:I don't get it on Software SSD Cache Implementation For Linux? · · Score: 1

    Hmm, swap to flash sounds good, but you pretty much lose it after rebooting.... I think we'd want something a bit more persistent so it can continue to help the system load fast after reboots or after frequently used but infrequently accessed stuff expires from SSD cache.

    I guess maybe if you set your computer to hibernate instead of powering down :-/

  10. Re:I don't get it on Software SSD Cache Implementation For Linux? · · Score: 1

    Submitter's probably looking at this backwards; just put the entire system on the SSD, and create symlinks to large directories hosted on conventional storage instead.

    Even very small 32GB SSDs are large enough to fit your entire OS on; then you can use the hard disk for large file storage. So I'd say it's probably not worth the effort to try to collect detailed traces using SystemTap or whatever to figure out which files should go on SSD and which should be relegated to the spindle drive; just put it all on SSD, and maybe put /home/ftp/pub on a conventional drive for all your archives / photos / videos / pr0n / etc. Then maybe move and symlink other directories to a place in the conventional drive as necessary after studying the output of "find / | sort -n" .. things like package repositories or seldom used data - /var/cache/apt , /usr/share/doc etc.

    It's really not all that different from the way you might treat different RAID levels, here's what I do on my current system:

    / - RAID10 -p f2 to maximize read performance /home , /usr/local/games - RAID5 to maximize storage space and still have decent performance as long as no drives have failed. /tmp , /usr/src - RAID0 lots of disposable space for fast writes, compiling stuff (personal projects are under SCC in /home), etc.

    There are also ways to use "readahead" tricks to optimize conventional drives during bootup or to preload applications (now outdated thanks to SSDs), but I don't reboot all that often so I don't really have much use for them :-/

  11. Re:I don't get it on Software SSD Cache Implementation For Linux? · · Score: 1

    Correct me if I'm wrong, but isn't /tmp usually mapped to a ramdisk?

    Depending on the distribution, but sometimes.

    On servers /tmp can get pretty big with random crap, though, so generally you want to be able to put it on a disk or allow it to swap out and use your RAM for something more useful.

    But on thin clients, netbooks, etc. without too much going on it might be better to put it on tmpfs to reduce SSD wear.

  12. Re:Now that.... on Japanese Spacecraft Bringing Back Space Rock · · Score: 1

    Sounds cool... how long before we can start mining the stuff?

    It would be neat to be able to start hijacking mineral and ice asteroids into LEO and start figuring out how to process the material from them so we don't have to spend so much resources launching mass up from the Earth. I'd say this is probably a pretty important first step in commercializing the space industry, beyond simply ferrying satellites or creating space hotels. Plus it's compartively low risk (other than getting attacked by astrologers)... just build some thrusters to harvest small asteroids and park them in Earth orbit; once they're there you can do some science and analysis on them and start auctioning off material for projects.

    Yeah, been playing EVE and Vendetta Online a bit too much.

  13. Re:call me when apple approves it on Android Ported To iPhone · · Score: 5, Insightful

    For all of their "think different" ads, Apple is a very traditional vertically-integrated engineering firm... like the old "big iron" unixes: Cray, SGI, SUN, IBM, where they sold the entire platform: hardware, software, custom interfaces, etc.

    For all the Microsoft-bashing we do around here, they were really the ones that separated hardware from software on the PC (and then Linux came around and offered the even more of the same).

    But now we have vertically integrated smartphones again. And for all the Google vs. Microsoft that we do, Android is pretty much Google's effort at doing to the smartphone what Microsoft did to the PC.

    So don't take your freedom of hardware abstraction for granted! But in the end, we pretty much know how this dance should turn out.... just look at what Cray, SGI, SUN, IBM are doing now :-P

    Apple will probably always be Apple (at least as long as Steve Jobs is around). Because he doesn't make products for us geeks, but for the rest of the people. He know his market well. And it is not us. So get over it and let the people have their stripped-down straightjacket internet devices.

  14. Re:Steam on Linux on More Evidence For Steam Games On Linux · · Score: 1

    I'm pretty excited about this... there's been a lot of pretty bad news in the past couple years regarding Linux gaming... the current version of UT was promised a Linux port which never arrived, EVE gave up on their crappy Linux port (likely because it actually ran pretty well under wine), and id Software of all people has made menacing threats about future Linux support.

    I've started playing a lot of Valve games lately, and now find it hard to go back to some of the other FPSs I've played before. The Steam community feature actually has me enjoying the social interaction, rather than dreading nettards. Steam succeeded in actually getting me to spend money on games again (even though lately I've taken to purchasing games on DVD from Amazon since sometimes they're cheaper and I can play different games on different computers when my kids are tying up one of the Steam logins).

    My current Linux server is a lot more powerful than my old Linux server that was repurposed as a gaming PC... when I bought it it was great for Tremulous and the various Wolfenstein 2 MP and UT2003 and EVE (though I stopped paying monthly for it) at the time, and then it just seemed like Linux gaming hit a brick wall. But here's hoping for a generation of geeky titles based on the Half Life / Portal / L4D franchises leading a resurgence!

  15. Re:In other news... on Steve Jobs Recommends Android For Fans of Porn · · Score: 1

    Perhaps. But Jobs was definitely trying to inspire some FUD (in this case, fear) against the Android when he said "You can download porn, your kids can download porn..."

    I'm not afraid of my son downloading some of the same porn I look at.

    My greatest fear is that my dad might download some of the same porn I look at. That would just be #$%^& creepy. Ew, why did you even bring it up? I really hope he has some much different porn that would in no way overlap with my tastes.

  16. Re:Um, Steve, a question on Steve Jobs Recommends Android For Fans of Porn · · Score: 3, Interesting

    The Android Market porn is actually pretty well hidden. Try the "Tic Tac Toe" app and click on one of the "X"'s three times.

    But really, Steve Jobs knows his market, and it is not computer geeks. Geeks know how to find porn, and save money by buying the best hardware they can for the price. Plus the non-geek market, is much, much bigger.

    Families are all too happy to throw money at problems if it saves them time trying to comparison shop. I know because I've started doing it myself, unfortunately :-/ But at least not when it comes to technology ... yet.

  17. Religion rant on Extremists Warn South Park Creators Over Muhammad In a Bear Suit · · Score: 1

    Meh, I don't think religion is all that bad, when it's viewed simply as part of a cultural background. It's kind of like an Operating System... a little book of code that determines what actions a person should take under a certain situation, what kinds of goals and values they have, etc. that would make them more predictable. It doesn't really matter if the instructions are true or logically sound or whatever, it just matters that people have some code of conduct that they can point to and say "yeah, that's me". With this computer analogy, I can kind of understand why the Middle East doesn't really accept atheism or agnosticism as a religion on visa applications, since that's sort of like saying they are computers without operating systems. (Maybe we could write some sort of codebook of atheism or whatever, more likely some choose-your-own-adventure customized thing tailored to each believer's sensibilities, but that's besides the point.)

    I like Neal Stephenson's analogy that organized religion tends to spread like a virus (or maybe more like a botnet in this day and age). People can produce more if they're organized into groups and work together, either through religion or government or military or whatever (yeah I've been watching my son play Spore too much). But that's going to happen no matter what, and it's not a bad thing as long as diversity is preserved so we don't become a monoculture, easily wiped out by a single shared fatal flaw. So back to the internet analogy different religions simply need to be able to network with each other, some are better at networking than others, and all have kooks that try to take over the rest. The kooks just want attention, and the media for the most part dishes it out to them.

  18. Re:Horribly misleading on New Speed Cameras Catch You From Space · · Score: 1

    Actually joining up the "sightings" of the car is pretty scary. I can see huge potential for abuse of this information either in realtime or retrospectively.

    Actually, I think it will be extremely fun to get identical plates on similar cars and see how fast I can convince the system the car was traveling...

  19. Re:hmm on The iPad As In-Car Entertainment System Killer · · Score: 1

    Heck, a $200 netbook would work better for entertainment.

    However, the missed story is that this is probably the largest screen you can run Google Maps Mobile on.

    I hate all things Apple with all of their intentional design restrictions, but I would have to contend that the iPad would make a very slick platform for GPS / Google Maps Mobile. But only because Google apparently refuses to make a port of GMM for notebooks / netbooks.

    Google Earth works OK on netbooks, but the GPS support is abysmal.

  20. qemu on Good, Portable "Virtual" Linux Distro? · · Score: 1

    The advantage of qemu over VMware or VirtualBox would be that you wouldn't need to install anything.

    I made a custom KNOPPIX LiveCD with my master's thesis on it, and worked out some .bat scripts to get it running it in place under Windows. (Copy it to the hard disk first for performance, no need to run off the CD if you're doing it in a VM)
    http://hairball.mine.nu/~rwa2/school/ense799/arcosim_20070601.iso

    You could probably adapt something like this for a more modern LiveCD / USB distro.

  21. Re:Whatcouldpossiblygowrong on Hidden Cores On Phenom CPUs Can Be Unlocked · · Score: 4, Funny

    Good work! I plan to do something similar soon, though the cost savings of getting a $100 2-core Ph2 and unlocking it to a $160 4-core Ph2 isn't so great :/

    I'll share my pseudo-failure story, though. I bought a Tyan Tiger MPX about 10 years ago to run dual SMP 1Ghz Durons. About 5 years later I upgraded the CPUs to 2.0 Ghz mobile Athlon XP. My motherboard couldn't control the mobile chips, so I think they only ran at 1.2Ghz or something for a time, then I got brave and whipped out the xacto knife and cut some bridges to clock them up to 1.8Ghz. After I migrated to a new server, I got even more brave and whipped out the pencil as well and linked some more bridges to get them up to ~2.2Ghz for the past few years. It's still my primary gaming machine (yeah, I'm too cheap to budget any real money towards entertainment, but it still runs most games better than my wife's 1-year old laptop, as long as they don't require 64-bit or DX10).

    Of course, it's quite a bit flaky now, I think due to the penciled bridges and probably old noisy cooling fans. It crashes when I kick the case, and if it gets too warm in the room, it just plain doesn't boot (motherboard gives out 5 beeps and it just sits there). But once it starts running a game for more than a few minutes it tends to continue to be OK

    Still, I'm plotting to migrate my current server to a low-power, low profile Zotac Zbox with some sort of external eSATA RAID, so I can free up my current hardware for gaming before it gets too outdated :-P

  22. Re:Well on What Will the Browser Look Like In Five Years? · · Score: 1

    Ha, given that the smartphone web is about 10 years behind the desktop web, the browser will be what it was on the desktop in 2005... which means flash (or some similar proprietary crap) and most of the user base being entrenched in some old version of non-standards-compliant browser. And myspace-esque music playing on each page. Fun times.

  23. Rodentiometer on History Repeats Itself — Mac & the iPad · · Score: 1

    Never heard anyone call a mouse by that name, but it did jog my memory about the little rodentiometer display buried in a menu somewhere that literally displayed how many feet and inches you've moved your mouse. In the context of how he was trying to kill cursor keys to force people to use the mouse interface, that metric suddenly makes a lot more sense than the cheap geeky gimmick I thought it was at the time.

    So, it was a fairly interesting article, despite the reek of fanboism and my relative distaste for the user-friendly straightjacket I always feel on me any time I actually had to try to use one of their products.

  24. Re:When you finish your MBA- it'll all become clea on What Is the Future of Firewalls? · · Score: 2, Interesting

    When you finish your MBA- it'll all become clear.

    After I got my MSSE (I guess the MBA for Nerds, though I didn't realize it at the time), I figured that was because all firewalls were supposed to be rendered obsolete and unnecessary by IPv6. Which explains why we're still stuck in 1995.

    So yeah, this is the answer, this is the ending. I shall drive without license, without clothing, without direction, and if I make it to Arkansas fine; if I'm running late; if I'm running a numbers game, it doesn't matter, I'll keep on running! Because a body in motion tends to stay in motion, and it's better to feel. Pain is better than emptiness. Emptiness is better than nothing; and nothing is better than this.

  25. Re:Cows with guns on Cows On Treadmills Produce Clean Power For Farms · · Score: 1

    Cartoon version is better than the claymation version:
    http://www.youtube.com/watch?v=FQMbXvn2RNI&feature=related

    if only because they didn't try as hard