Why does Bitcoin Core take up so much space?

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It's not Bitcoin Core that's taking up all the space, but the Bitcoin blockchain that Core needs to download, validate, and reference. This is because Bitcoin Core is what's called a full node. There is another type of wallet, called an SPV client, that does not require the full blockchain to operate, but relies on the trustworthiness of other peers in order to validate transactions. I get the feeling that an SPV client is probably what you're looking for.

Alternatively, if you really want to run Core, you can store the downloaded blockchain on a separate hard drive so long as that drive is mounted when you want to run core. You can learn more about that here: How do I relocate my bitcoin data in bitcoin-qt to save...

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You are confusing validation with confirmation.

When you spend / credit your card, VISA etc. validate you have the card and then send a signal back to the register saying "its all good, give the guy his coffee"

However, there is a 3 month period where the transaction could be reversed on a whim and the merchant would not actually receive the money for your coffee. This is called a chargeback.

Finally, after 3 months or so, the money is deposited to the coffee shop's account.

With bitcoin, you scan a qr code with Bitpay / Coinbase, and within 1-2 seconds a green check mark pops up saying "it's all good, you can give the guy his coffee"

However, if a person with enough technical ability, and the drive to steal a coffee wanted to put their mind to it, there are some ways that they can attempt to swindle the store with some custom wallet software or an accomplice who has administrator access to a large mining pool. Most of which are easy to detect...

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New technology will be deployed when it is ready and has been tested. However, we believe the following is a reasonable schedule for the specific improvements described in the roadmap.

Segregated witness testnet: a separate testnet (not part of the regular testnet) that provides an opportunity for Bitcoin Core contributors to test segregated witness and for wallet authors to begin working with it.

Libsecp256k1 verification: 500% to 700% speed boost on x86_64 hardware during verification to help new full nodes join the network and to lighten the burden on existing nodes.

OP_CHECKSEQUENCEVERIFY: 25,000% improvement in bi-directional payment channel efficiency by allowing users to keep channels open as long as they want.

VersionBits: increase the maximum number of soft forks able to be deployed simultaneously from 1 to 29, allowing for faster and more decentralized future upgrades of the network.

Segregated witness: 175% to...

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WhyBitcoin block space is like Starbucks coffee.

Recently I've seen a number of people in the Bitcoin ecosystem commenting that they think that Bitcoin blocks should always be completely full. This is analogous to thinking that Starbucks should always be completely sold out of coffee. Block space is like coffee in that it is a consumer good. When consumers buy coffee, they are expressing their desire for this consumer good. When Bitcoin users pay transaction fees for inclusion in a block, they are expressing their desire for the consumer good of block space as well.

In the coffee market, there are numerous suppliers of coffee. We have Starbucks, Tully's, Costa, and numerous others. We also have competitors to drinking coffee, such as Coke, Pepsi, water, caffeine pills, and a myriad of other options. Consumers will look at the price of coffee from the various suppliers, and coffee alternatives. They will then decide the amount they wish to purchase based on their individual...

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I got several questions from readers this week, all of them related to how large games are. So I'm going to answer them all in the same column.

First question:

Hi, Shamus,

Big fan here. Love your writing. Keep it going, man!

So, the other day I saw that one of the recent Metal Gears made fun of the fact that you don't have to change CD's anymore. (I think it was 4...) And that got me thinking... If Metal Gear Solid (from the PS1) was made today, with today's technologies, would the same game, audio, graphics and content fit in a single CD? What I'm asking is... can new technologies in file compressing and optimizations make old games considerably smaller, thus requiring less disks?

Thanks a lot,

Rodrigo Lima Diniz

Short answer: A very annoying "maybe".

Data compression is the science of reducing the size of data, usually to reduce its storage or transmission footprint. We've gotten pretty good at it in some cases, and...

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Bitcoin becomes more valuable as bitcoin transactions become more secure. That is an important thing to keep in mind when trying to understand why the hell bitcoin is being launched into space.

Why? Because what's a more secure place for the computers processing bitcoin transactions than in orbit several miles above the earth? That's why core bitcoin developer and founder of Dunvegan Space Systems Jeff Garzik has developed the BitSat program, which plans to launch computers on small, (relatively) cheap satellites in 2016.

In order to have a truly comprehensive understanding of the concept of bitcoin in space, it helps to have advanced degrees in computer science, mathematics, economics, finance, engineering, and law. In order to simply understand enough to sound smart at dinner parties, it helps to understand that bitcoin is both money and a tool for carrying out financial transactions.

Think of a taxi driver and passenger. On one hand, they're both people...

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Table of contents

General

What is Bitcoin?

Bitcoin is a consensus network that enables a new payment system and a completely digital money. It is the first decentralized peer-to-peer payment network that is powered by its users with no central authority or middlemen. From a user perspective, Bitcoin is pretty much like cash for the Internet. Bitcoin can also be seen as the most prominent triple entry bookkeeping system in existence.

Bitcoin is the first implementation of a concept called crypto-currency", which was first described in 1998 by Wei Dai on the cypherpunks mailing list, suggesting the idea of a new form of money that uses cryptography to control its creation and transactions, rather than a...

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Bitcoin has "died" 93 times since it's inception, according to mass media outlets. You can see all of the times

here

. You've read "Bitcoin is dead" over and over again in every major media outlet around the world. Why did Bitcoin

fail a few weeks ago

? One of the one-hundred core developers left the project. One of the so-called "top" developers of Bitcoin. Yes, you're reading that correctly. One developer out of one-hundred, who had the 92nd most activity out of the 100 Bitcoin core developers on

Github

. No disrespect to Mike Hearn, he was great, but in all reality he committed (a commit is the making of a set of tentative changes permanent in a codebase, in other words getting your work published) 3 times. The top developer of Bitcoin has made 1,205 commits. Mike left in a tirade and made the price dip ~15% while grabbing headlines everywhere.

The good news, the price has rebounded, hovering around the ~$400 price in the last few weeks as shown below....

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The more you use an app, the more space the app takes up on your phone. So if you use Instagram more than other apps, it's likely it will take up more space on your phone than apps you don't use as often. However, your phone automatically resets the storage space an app uses every week, so you don't need to worry about storage for any app becoming gradually larger over time.

If you want to manually decrease the amount of space Instagram takes up, you can delete and reinstall the app (your photos and profile data will be saved).

On iOS, you can find out how much space Instagram takes up on your device by opening the Settings app and tapping General > Usage and finding Instagram in the Storage...

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Maybe you haven’t noticed it, but I know I have. My Bitcoin wallet has recently taken longer and longer to receive a Bitcoin payment, have advised me of a delay, and sometimes even told me why I am still waiting. This wasn’t happening 2-3 months ago, but the issue of Blockchain delays for transactions has been happening off-and-on all year long. It is a two part problem, from what I can gather, so let’s review the main factors and potential solutions.

Block size debate was kicked down the road

In the summer of 2015, the block size debate was all the rage, as the Bitcoin protocol showed signs of transaction fatigue for the first time. Some major corporations wanted to spike the block size to as high as 8 MB to ease the flow of Blockchain transaction traffic. In the end, the community punted and kicked the block size can down the road. More efficient applications like the upcoming Segregated Witness are coming before year’s end, increasing the effective size by as much...

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Not clear if -datadir was invoked in the OP's report to properly point to the new blockchain folder. Not clear if Bitcoin actually ran the hard drive out of space (which could make for database inconsistencies or corruption). Not clear if Bitcoin was properly and completely closed before data files were manually moved.

Locking fixes committed over the last year should have fixed the original result of running out of datadir space, which was to crash spectacularly.

I think this is better resubmitted as an (improvement)(feature) request focusing on the specific area where improvement is thought to be needed. A really good bug report has a pull request, and if not, a specific code change request. I'll outline two feature requests that are compact enough in scope to be addressed:

OS Installer: Include insufficient datadir disk space check/warning upon install.

a. set minimum disk free space as educated guess for near future ~40gb (similar to...

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If you owned bitcoin prior to Aug. 1 and slept in a little that morning, you would have woken up to find your stash had doubled—sort of.

Before Aug. 1, there was a single bitcoin currency simply called bitcoin, or BTC. Like most cryptocurrencies, bitcoin avoided having a central bank that verified transactions by maintaining a constantly verified ledger of transactions that was distributed across thousands of computers. This ledger is called the blockchain, and up until Aug. 1, there was only one of it. That day, at 8 a.m. Eastern, an “alternative coin” called Bitcoin Cash, or BCC, was born when the bitcoin blockchain split in two. Bitcoin Core, as the original currency is now called, and Bitcoin Cash have identical ledgers until Aug. 1. Now each currency maintains a separate ledger, and since cryptocurrencies are represented by their blockchains, that means bitcoin has effectively split in half, giving each user a bank account filled with both currencies.

The...

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Guidelines

**Culture** Here you’ll find all sorts of discussions related to playing League of Legends. From discussions about your personal strategies, to speculation about the next champion or patch, if it’s about playing the game, it goes here. This is not a Board for gameplay bugs, please head on over to [Report a Bug](http://boards.na.leagueoflegends.com/en/c/bug-report) for that. **Etiquette** Follow the Universal Rules and keep content focused on appropriate topics for these boards. We want a place for everything, but if we don’t keep things organized, the boards become a lot less useful and a lot more cluttered. Join the discussions with posts about your favorite or least favorite champs, or rant or reason about recent balance changes. Leave questions and feedback for the teams working on champions and gameplay. Most importantly, always vote for posts based on how valuable you think the content is, and mention Teemo as often as possible. > > ***...

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Have you ever been sitting next to a teen boy when his legs are splayed as far as they can go into both chairs next to you? How awful is it competing for armrests next to a businessman on a plane?

Why is it that men take up so much space? Moms always joke to me that having a house full of teen boys feels like living with a herd of elephants. Splaying legs and arms is actually a territorial display of dominance. In other words, when we make our body take up more physical space we are actually trying to claim it as our own and assert power.

More often than not, men do this more than women. This is because men often feel the need to claim power in a room or assert dominance and, evolutionary, women are trained that dominance or asserting power is negative for a female. Teen boys especially feel the need to assert dominance. This is because as they reach puberty and get closer to adulthood they have inner struggles with independence and their own manliness. Territorial...

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Authored by Kevin Muir via The Macro Tourist blog,

We all know Dirty Harry’s viewpoint about opinions, but I wonder what Detective Callahan would think about today’s bitcoin mania. It seems like every Tom, Dick and Harry feels obliged to weigh in about the manic action of the their favourite virtual currency, yet I am curious how many of these crack pundits have ever even transacted in bitcoin.

I am by no means an expert, but have at least owned bitcoins, mined them, and even arb’ed them across various exchanges. I use the word “I”, but in reality, it was with the help of my co-worker, the millennial computer engineer whiz kid that sits beside me. This is the story of my great bitcoin bungle, a tale painful to repeat, but should really be put to paper, so I can forever remember, what a knob I am…

But first, a trading yarn as old as the hills.

It comes from a story about a man who joined a friend down at the docks. They were working in a fish...

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