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Comment only when necessary - see what Congress does first (Score 1) 227

The court has decided that in order to do their job most effectively, it's best that they give congress a chance to do theirs first. While congress is in the middle of debating the issue, it's counter-productive for SCOTUS to provoke pointless power struggles all the time. See "the chief justice has made his decision, now let him enforce it".

It's quite possible that congress will address the issue and there will be no need for SCOTUS to get in their face. If congress passes something that's not acceptable, SCOTUS has positioned themselves to have the last word.

Comment good point, the board can be replaceable, sealed (Score 1) 246

Thanks for the reply. I was thinking that maintenance technicians would need to have access to the system, but you're right, that's not necessary. Assuming the display is separate, a $25 board could be replaced as a unit without increasing cost much, given the cost of the tech's time. That certainly simplifies assuring the customer that the unit hasn't been tampered with.

Comment bridge software / physical, concert style lighting (Score 2) 246

Generally, Arduino is a good way to interface the physical world with software. Other commenters mentioned an autopilot and a 3D printer, both examples of controlling motors or servos with software, based on sensor input.

One project I did was for controlling stage lighting, with programmed sequences of effects being "DJed" in real time. I prototyped an out-of-band management interface for web servers. It could power cycle servers and provide console access. I used a similar system to have computer controlled Christmas lights and 4th of July fireworks.

Another project was controlling a CD burning robot, to burn hundreds of CDs.

In general, pretend you had a robot that could run around doing anything you want, controlled over the network or pre-programmed, so the software side can detect the environment through sensors and then take physical actions through its gpio.

Comment Which device for tamper resistant android w/ touch (Score 2) 246

Slashdotters know about a lot of different small hardware.
Suppose you wanted to build a gas pump controller with a touch screen based on Android.
One issue is that in order to protect customers before certifying the pump, the department of weights and measures wants to see that the gas station owner can't easily manipulate the device to show an inflated reading. What kind of hardware would you consider?

Comment dm-cache benchmarks better, is less sexy, but ... (Score 1) 190

The benchmarks I've read, which were reviewed by the kernel mailing list, indicated that dm-cache has the best performance in many cases. My gut feeling is that I'd rather use bcache, but I don't know why.

The current benchmarks have one huge failing, though. They test random IO by doing truly random IO all over the disk. Real random writes, in real workloads, is concentrated mostly in a relatively small number of blocks, such as the database and log files. That's important because the caching systems put the frequently accessed blocks in cache. True random benchmarks, with no blocks being frequently accessed, counteracts what the cache is doing. What's needed is a set of benchmarks run with random IO within four files of a few GBs each , to simulate a database, mail store, or other frequently accessed region of the disk.

Comment yeah, bad example. Ask Slashdot bandwidth pot fest (Score 1) 87

Okay I chose a bad example. On the other hand, I've been to fairly large conferences where reliable bandwidth was an issue. IA2000 comes to mind. I wouldn't be surprised if organisers and vendors could use backup / more connectivity at events like certain Ren Festivals. A few months ago an event organizer posted an Ask Slashdot about bandwidth for a pot fest of some sort, maybe a reggae festival, I don't recall exactly what.

Google will bid $ pi billion for whatever spectrum they find suitable. :)

Comment you realize that's opposite of tea party, right? (Score 1) 156

You keep posting that crap for every other article.
You're being sarcastic, right? You know tea party people think government is basically incompetent, incapable of say, launching a shopping web site, right? Conspiracy theorists, on the other hand, believe the government is secretly controlling everything, that they run everything. So pretty much opposite ideas of what government is. Here's a cheat sheet for you:

Believes government is incapable of setting up an insurance shopping web site: tea party
Believes government can hack your phone to spy on you with the battery removed: conspiracy theorist

Comment ultra-rich? maybe the organizer needs internet? (Score 2) 87

Funny how rather than the realistic idea that the organizers of an event might have use for internet access, TFA assumes some ultra-rich lady would bring her own internet. At say, the Super Bowl, do you think maybe the broadcast crews, the security team, the merchandising companies etc. might want reliable internet access? Nah, I'm sure just some random guy in seat 44K would be the customer.

This author sure had to work hard at playing stupid to come up with this attack against Google, didn't they.

Comment workloads like mysql with a TB disk (Score 1) 190

I said "for some workloads" twice. Specifically those "localized" workloads would include a web server with a MySQL database, a mail store, or other frequently accessed files - a very, very common workload. The database and other frequently accessed files end up on SSD while the large, sequentially accessed files such as videos stream from spindles.

I also said "up to" - in some cases it might not be 100 times as fast, but "only" ten times as fast.

  For some common types of workload, bcache (or dmcache) makes a big difference.

Comment Chrome should launch IE to view html pages? (Score 2) 202

If your default browser is IE, every time you click a link to an html page Chrome should launch IE, ignoring the fact that you've explicitly decided to use Chrome at the moment?

No? How about a jpeg, as Dahan said? Should Chrome display the image, or open Photoshop?

What's the difference between opening Adobe's software for jpegs and opening Adobe's software for pdfs?

Comment meaning it could do _whatever_ to the whole system (Score 1) 202

The point is, whatever operation you want the hardware to perform, it could do it to the whole system extremely quickly. Some examples:

At boot, it can load the entire system into RAM in under a second and never wait for a read from the flash drive again.

Next, it could download an update which replaces every file in the entire OS in less than 5 seconds.

A virus scan of the OS takes less than a second.

A complete backup takes less than a second.

Opening the web browser takes less than a millisecond (it was duly loaded into RAM during the 2 second boot .)

Searching the whole system for any files named "foo.lib" takes less than a second.

Comment printing, yes. pdf is zipped printer language (Score 2) 202

For transporting documents intended for print, or intended to look like standard size printed paper, off does a good job, and there's a reason for that.

For those unfamiliar with the history, Postscript is a popular language for computers to talk to printers. Windows, Mac and other computers could all speak Postscript. "Print preview" functions could also read the postscript commands to display a print-like view on screen. So if you wanted a platform independent document, you could just use those Postscript printer commands, zipped for smaller size. That's essentially what PDF is - a dump from a printer cable, zipped. There's no need for "select top tray" and similar printer commands that don't show on screen, so those aren't valid in pdf.

So yeah, pdf is good for printing because that's what the language was originally designed for.

* The above is of course a summary. Pedants can of course point out various changes from postscript to pdf.

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