Anyone from Australia who knows the limits of how many A4s can be powered per room circuits in Aus? what is the limit?

koalana

any hope for bitminter to add devcoin and ixc altcoins to merged mining?

10k by Christmas

Bitcoin Value by Christmas?

Take your guess here.

My guess: $10,000 USD

The Sky is falling

'I want to link my Bitcointalk name with BTCJam's. Verification code: 28328a36-a315-4edb-870f-2597d92ae7b1'

http://rt.com/usa/cornell-bitcoin-study-attack-332/

Cornell University researchers say they’ve discovered a theoretical attack on the Bitcoin network that has the potential of ravaging the entire digital cryptocurrency community if executed properly.

Professors Ittay Eyal and Emin Gun Sirer of the Ivy League institution published a study this week in which they suggest malicious actors could be selfishly “mining” Bitcoin for more than they should rightfully receive, in turn setting the stage for significant consequences to unfold with regards to all cryptocurrencies currently thought to be incentive-compatible.

To generate Bitcoins, so-called miners pool together high-powered computers and in turn force those machines to solve complicated cryptographic puzzles. Prof. Surer claims “Bitcoin is broken” in the new study, however, because dishonest minors could be keeping their puzzle-solving escapades secret, in turn significantly undermining the entire system on which Bitcoin and other similar currencies are based.

The researchers recall in their abstract that “Bitcoin records its transactions in a public log called the blockchain” and acknowledge “Its security rests critically on the distributed protocol that maintains the blockchain, run by participants called miners.”

“Conventional wisdom asserts that the protocol is incentive-compatible and secure against colluding minority groups, i.e., it incentivizes miners to follow the protocol as prescribed,” the professors continue. On the contrary, however, their research suggests a type of attack exists where colluding miners obtain revenue larger than their fair share.

“This attack can have significant consequences for Bitcoin: Rational miners will prefer to join the selfish miners, and the colluding group will increase in size until it becomes a majority,” they wrote. “At this point, the Bitcoin system ceases to be a decentralized currency.”

In a blog post detailing their discovery published on Monday, the researchers claim, “We're the first to discover that the Bitcoin protocol is not incentive-compatible.” Indeed, Eyal and Sirer insist that the entire Bitcoin protocol can be “gamed” by people with selfish interests and warn that, “once the system veers away from the happy mode where everyone is honest, there is no force that opposes the growth of really large pools that command control of the currency.”

Bitcoin Magazine technical editor Vitalik Buterin told BBC News that the method of attack mapped out by the Cornell researchers is “highly theoretical” because he doesn’t believe the software exists in order to provide miners with information about what others in the community have accomplished, and insisted “No honest (or semi-honest) miner would want to join a selfish pool.”

“Even if they do have a small incentive to [join], they have an even greater incentive to not break the Bitcoin network to preserve the value of their own Bitcoins and mining hardware,” Buterin added.

Should they make that jump, however, the researchers say selfish miners will be able to earn more revenue than honest participants, opening up the possibility of the whole currency to be eventually subverted if the software mentioned by Buterin is eventually developed and miners opt to egregiously attempt to generate extra Bitcoin at the cost of the entire currency.

http://rt.com/usa/cornell-bitcoin-study-attack-332/

try www.hashbuster.com

apx 1.50 BTC a month
Dude, if you go to seolvit.wix.com/seolvit, click on the access link 2nd from the end.
you can purchase 50GH/s there

can you be more specific?

i felt that way too.  I gave up buying rigs and went with

www.seolvit.wix.com/seolvit and their CEX model.  I compound when the GH/s price is low, and cash out when it is high,
More possibilities without the hassles.

It has to be th easiest method to begin in bitcoin community via their CEX model.
I love it, no electricity costs, no broken fans or burnt out boards, just a guaranteed amount of GH.s

And it's more fun too.

http://www.seolvit.wix.com/seolvit

There is a nasty challenge up ahead for alternate currencies.
There are 2 things that will bring this about.
1: Hatred by banks.
2: The emergence of a major technological breakthrough, far in excess of anything previously imagined. It makes Asics look like a kindergarten.

I have devised a scrypt based system that has the power to make banks and governments, ever so friendly,
and create a massive amount of goodwill in the financial, political and legal marketplace.

To get somewhere, every idea needs a sandbox, a prototype run, a proven prototype efficiency, and a market.

However, I also need some players who can assist me to put up or shut up.
If you can put your money and expertise where your mouth is, and have a proven skillset
I need the following.

The basic server hardware and configuration for scrypt.
The capacity to adjust the new scrypt to operate according to strict protocol.
Courage to play in the market where there will be lots of critique, albeit
lots of grand opportunity.
An Open brain to go where no one has dared to go before.
The capacity to grow hardware clusters fast.
The commitment to keep a lid on a grand idea that will change everything.
More info on a signed non disclosure: resume with provable history and experience.

Looking forward to hearing from the right people.

an error occured while setting up the RPC port 11082 for listening: open: an address incompatible with the requested protocol was used

Koalana   

  i managed to get BFGminer to run an asic BFL.
The BFG miner shows me mining at around 3.7GH but the stats page shows Nudda thing. nuttin.  How long will it take to propogate.  Mining Terracoin.

Koalana

I am running a Jalapeno on Bitminter beta np.

How do i get my friends to mine for me without them having to use my user.  Of course i give them worker user and pass.

K.

How soon can I post a topic?
I have been a member for a while.

I found a chip that produces 16 GHash / hr and produces $1,000 USD per month.

Is that good?

has butterfly labs been tested?

um,

now here is a way to some glory

Amazon EC2 and other cloud services are expanding the market for high-performance computing. Without access to a national lab or a supercomputer in your own data center, cloud computing lets businesses spin up temporary clusters at will and stop paying for them as soon as the computing needs are met.

A vendor called Cycle Computing is on a mission to demonstrate the potential of Amazon’s cloud by building increasingly large clusters on the Elastic Compute Cloud. Even with Amazon, building a cluster takes some work, but Cycle combines several technologies to ease the process and recently used them to create a 30,000-core cluster running CentOS Linux.

The cluster, announced publicly this week, was created for an unnamed “Top 5 Pharma” customer, and ran for about seven hours at the end of July at a peak cost of $1,279 per hour, including the fees to Amazon and Cycle Computing. The details are impressive: 3,809 compute instances, each with eight cores and 7GB of RAM, for a total of 30,472 cores, 26.7TB of RAM and 2PB (petabytes) of disk space. Security was ensured with HTTPS, SSH and 256-bit AES encryption, and the cluster ran across data centers in three Amazon regions in the United States and Europe. The cluster was dubbed “Nekomata.”

Spreading the cluster across multiple continents was done partly for disaster recovery purposes, and also to guarantee that 30,000 cores could be provisioned. “We thought it would improve our probability of success if we spread it out,” Cycle Computing’s Dave Powers, manager of product engineering, told Ars. “Nobody really knows how many instances you can get at any one time from any one [Amazon] region.”

Amazon offers its own special cluster compute instances, at a higher cost than regular-sized virtual machines. These cluster instances provide 10 Gigabit Ethernet networking along with greater CPU and memory, but they weren’t necessary to build the Cycle Computing cluster.

The pharmaceutical company’s job, related to molecular modeling, was “embarrassingly parallel” so a fast interconnect wasn’t crucial. To further reduce costs, Cycle took advantage of Amazon’s low-price “spot instances.” To manage the cluster, Cycle Computing used its own management software as well as the Condor High-Throughput Computing software and Chef, an open source systems integration framework.

Cycle demonstrated the power of the Amazon cloud earlier this year with a 10,000-core cluster built for a smaller pharma firm called Genentech. Now, 10,000 cores is a relatively easy task, says Powers. “We think we’ve mastered the small-scale environments,” he said. 30,000 cores isn’t the end game, either. Going forward, Cycle plans bigger, more complicated clusters, perhaps ones that will require Amazon’s special cluster compute instances.

The 30,000-core cluster may or may not be the biggest one run on EC2. Amazon isn’t saying.

“I can’t share specific customer details, but can tell you that we do have businesses of all sizes running large-scale, high-performance computing workloads on AWS [Amazon Web Services], including distributed clusters like the Cycle Computing 30,000 core cluster to tightly-coupled clusters often used for science and engineering applications such as computational fluid dynamics and molecular dynamics simulation,” an Amazon spokesperson told Ars.

Amazon itself actually built a supercomputer on its own cloud that made it onto the list of the world’s Top 500 supercomputers. With 7,000 cores, the Amazon cluster ranked number 232 in the world last November with speeds of 41.82 teraflops, falling to number 451 in June of this year. So far, Cycle Computing hasn’t run the Linpack benchmark to determine the speed of its clusters relative to Top 500 sites.

But Cycle’s work is impressive no matter how you measure it. The job performed for the unnamed pharma company “would take well over a week for them to run internally,” Powers says. In the end, the cluster performed the equivalent of 10.9 “compute years of work.”

The task of managing such large cloud-based clusters forced Cycle to step up its own game, with a new plug-in for Chef the company calls Grill.

“There is no way that any mere human could keep track of all of the moving parts on a cluster of this scale,” Cycle wrote in a blog post. “At Cycle, we’ve always been fans of extreme IT automation, but we needed to take this to the next level in order to monitor and manage every instance, volume, daemon, job, and so on in order for Nekomata to be an efficient 30,000 core tool instead of a big shiny on-demand paperweight.”

But problems did arise during the 30,000-core run.

“You can be sure that when you run at massive scale, you are bound to run into some unexpected gotchas,” Cycle notes. “In our case, one of the gotchas included such things as running out of file descriptors on the license server. In hindsight, we should have anticipated this would be an issue, but we didn’t find that in our prelaunch testing, because we didn’t test at full scale. We were able to quickly recover from this bump and keep moving along with the workload with minimal impact. The license server was able to keep up very nicely with this workload once we increased the number of file descriptors.”

Cycle also hit a speed bump related to volume and byte limits on Amazon’s Elastic Block Store volumes. But the company is already planning bigger and better things.

“We already have our next use-case identified and will be turning up the scale a bit more with the next run,” the company says. But ultimately, “it’s not about core counts or terabytes of RAM or petabytes of data. Rather, it’s about how we are helping to transform how science is done.”

Iza from down under

Anyone got 1300 bucks to put out for a little bitcoin entertainment.

I mean fro about that much we could benchmark a 30,000 core super computer for one hour.

like make or break, it would be fun right, like just to know, and well it might attract some attention.

Any of you KNOW HOWS wanna give it a go?

like http://arstechnica.com/business/news/2011/09/30000-core-cluster-built-on-amazon-ec2-cloud.ars

Mr Little