Hash.fish Review 3 Reasons Why Hash Fish Mining is Risky

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What is Hash Rate?

What is Hash Rate?

Hash Rate – A hash is the output of a hash function and, as it relates to Bitcoin, the Hash Rate is the speed at which a compute is completing an operation in the Bitcoin code. A higher hash rate is better when mining as it increases your opportunity of finding the next block and receiving the reward.

If you are planning to get involved in crypto mining soon, it’s crucial to know what a hash rate is and its significance.

You also need to understand its effect on your capacity to mine the coins. Having good knowledge in hash rate can help you make the best decisions when you are in the mining business or doing it as a hobby.

This article will discuss:

  • What is hash rate?
  • Hash rate’s importance
  • The impact of electricity costs on your profitability

Defining A Hash Rate

In simple terms, a hash rate can be defined as the speed at which a given mining machine operates. Crypto mining involves finding blocks through complex computations. The blocks are like mathematical puzzles. The mining machine has to make thousands or even millions of guesses per second to find the right answers to solve the block.

In other words, to effectively mine a block, the miner should hash the block’s header such that it’s below or equal to the “target.” The target changes with every change in difficulty. To arrive at a given hash (or target), the miner has to vary some of the block’s headers, which is known as a “nonce”.

Each nonce begins with “0” and is increased every time to get the necessary hash (or target).

Given that the varying of the nonce is a game of chances, the chances of getting a given hash (or target) is very low. The miner, therefore, has to make numerous tries by varying the nonce. The number of attempts that miner makes per second is known as the hash rate or hash power.

Quick Tip

Mining is not the fastest way to get bitcoins.

Measuring The Hash Rate And Its Units

Hash rate is computed in hashes per second (h/s).

Some of the common terms used include mega, giga, and tera depending on the number of hashes. For instance, a machine with a speed of 60 hashes per second will make 60 guesses per second when trying to solve a block. Kilohash (KH/s) is used for 1,000 hashes, megahash (MH/s) for 1,000 kilohashes, terahash (TH/s) for 1,000 megahashes, and petahash (PH/s) for 1,000 terahashes.

The various machines used to mine different cryptocurrencies don’t have equal hashes.

For instance, a mining machine for bitcoin has a different hash rate from that of ethereum. This can be defined by the different algorithms used by the cryptocurrencies as they don’t use the same amount of memory and computing to be mined.

The Relationship Between The Hash Rate, Miner’s Profits, And Difficulty

The hash rate, miner’s profits, and difficulty depend on each other in several ways. Let’s take bitcoin for instance. Any time Bitcoin network’s difficulty increases, the hash rate increases and consequently, the miner earns 12.5 BTC and the transaction fees. The number of miners in the Bitcoin network increases the difficulty, as a miner needs to compute more guesses per second.

The Impact Of Electricity On Profitability

For profitability, let’s consider bitcoin. Currently, a bitcoin mining device such as ASIC has a mining power of approximately 12 terahashes per second. After considering today’s difficulty, the machine can produce 0.318 BTC per year.

However, when calculating profitability, you need to consider electricity costs linked with the mining equipment. This is called the efficiency of the miner.

An increase in the difficulty of mining a cryptocurrency increases the electricity cost. For instance, a mining machine with a 10 percent higher hash rate than another, but has 50 percent higher electricity costs is both wasteful and less profitable.

Quick Tip

Mining or buying bitcoins? You can’t do either without a Bitcoin wallet.

Our guide on the best bitcoin wallets will help you pick one. Read it here!

Although the hash rate is an important factor to consider when mining, always remember to consider the efficiency.

chsh does not recognize fish as a shell #669

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ryanthejuggler commented Apr 18, 2020

All Debian shell packages should insert the name of their binary into the shells file; if they do not this is a bug.

The make install command ought to do this automatically. As it is, chsh throws the error:

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ghost commented Apr 18, 2020

It went smoothly for me on OS X 10.8.3 (Mountain Lion). Which are you running?

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zanchey commented Apr 18, 2020

If you install using the Debian packages, rather than compiling from source, fish will be added to /etc/shells . Supported Debian packages are at http://download.opensuse.org/repositories/home:/siteshwar/ and I support the PPA at https://launchpad.net/

make install probably shouldn’t fiddle with anything outside $PREFIX .

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ryanthejuggler commented Apr 18, 2020

I’m on Ubuntu 12.10. Not trying to be pedantic or anything; I assumed it would be a quick fix. If it violates best practices though you can mark this bug as wontfix .

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lcowell commented Apr 18, 2020

Can you confirm that you have added /usr/local/bin/fish to your /etc/shells file ? I ran in to this issue as well.

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ryanthejuggler commented Apr 18, 2020

Ahh, perhaps I should clarify.

Installing using make install does not add fish to /etc/shells . I did add it manually and that allowed me to use fish just fine, but my bug report was to automate the process using the makefile. Since only the superuser can make install it would be simple to add a line to the makefile appending /usr/local/bin/fish to the shells file.

Sorry for any confusion.

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adisbladis commented Apr 19, 2020

@ryanthejuggler Bad idea.. Neither configure nor Makefile should modify anything outside of $PREFIX
This is something that should be done by the packager for the specific platform.
I made a pull request to fix exactly this type of behaviour just over a week ago: #655

This caveat is already in the “make install” output:

To use fish as your login shell:

  • add the line ‘/usr/local/bin/fish’ to the file ‘/etc/shells’.
  • use the command ‘chsh -s /usr/local/bin/fish’.

So maybe highlight that better, otherwise I feel this is a non-issue.

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ridiculousfish commented Apr 21, 2020

It might be reasonable to add a special target to the Makefile that would add it to /etc/shells/, as long as it is something that is run manually, and not part of the install target.

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ridiculousfish commented Apr 27, 2020

We have a script build_tools/osx_package_scripts/add-shell that adds fish to /etc/shells. It should work fine on Linux.

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bpinto commented May 18, 2020

I didn’t know about the script, this is how I did it:

Outstanding fish hash – 3 Frakkar

We had the fish hash and the whale steak. They provide fresh bread and butter/tuna salad spread and dried fish prior to arrival of the main dish. Fish hash was very good and was a generous portion, with a darker black sweet bread for contrast to the hash for 2750 isk and the whale pepper steak with pepper sauce with potatoes and carrots for 3990 isk. The whale steak is surprisingly meat like and is served fairly rare and appears bloody when cutting into it, but is pretty tasty. Probably not for the unadventurous eater. The fish hash was a winner. Good service, and fairly priced for Iceland.

We eat here every year and love it. I always end up eating the herrings. The restaurant is a little crowded, but that makes it fun. It is full of locals which is a good indicator or how good it is. It is a very short walk from the Hotel Holt where we stay. Highly recommended.

My friends and I (4 of us in total) decided on this place to have our very last dinner in Iceland. This was mostly due to the fact that they served puffin, raw whale, and hákarl. While ordering we chose 4 starters and our waiter suggested a “tasting” plate of 5 starters to save on money. The halibut with lobster was amazing and the whale steak was divine. We were all very happy with our food.

We were a walk-in table and was closing in on their starting reservations. The staff felt bad about rushing us and comp’d our drinks; beer and wine. Definitely make a reservation, so you don’t miss out on this place!

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A few blocks off the busy shopping streets is a lovely French bistro that serves wonderful Icelandic food. The fish and the lamb were exquisite, the wine list pretty good. There’s a great list of starters. Relatively pricey, even for Iceland, but the food was genuine without being fussy or trendy. Great spot for a romantic dinner. Reservations almost always necessary.

We stopped by on our way to the airport at 5PM. Luckily, this place was open. We didn’t think much from the outside, just a cute corner restaurant. Turns out it’s pretty famous and popular in Iceland with multiple accolades. Because of our odd dining hour, we were able to get in without reservations, although they are highly recommended. They have a great appetizer dish to share – 5 small selections to taste. We chose the smoked puffin and cured whale and let the chef choose the rest. The cured whale was amazing; raw whale tastes like raw sea beef, what else; the fish soup was incredible; the pancake dessert was also superb. An appetizer platter, modest soup dinners, a beer, a cocktail, a coffee and a dessert to split came to around $90 – by Icelandic standards, that’s pretty good. Especially for a restaurant of this calibre. It’s cozy and romantic with traditional Icelandic dishes and a nautical decor.

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Is Hash Rocket deprecated?

The well-cited RIP Hash rocket post would seem to imply the Hash Rocket syntax ( :foo => “bar” ) is deprecated in favor of the new-to-Ruby JSON-style hash ( foo: “bar” ), but I can’t find any definitive reference stating the Hash Rocket form is actually deprecated/unadvised as of Ruby 1.9.

1 Answer 1

The author of that blog post is being overly dramatic and foolish, the => is still quite necessary. In particular:

  1. You must use the rocket for symbols that require quoting: :’where.is’ => x is valid but ‘where.is’: x is not. Ruby 2.2 has fixed this problem so you can say ‘where.is’: x in Ruby 2.2+.
  2. You must use the rocket for symbols that are not valid labels: :$set => x is valid but $set: x is not. In Ruby 2.2+ you can get around this problem with quotes: ‘$set’: x will do The Right Thing.
  3. You must use the rocket if you use keys in your Hashes that aren’t symbols: ‘s’ => x is valid but ‘s’: x is something completely different.

You can kludge around the above in the obvious manner of course:

but that’s just ugly and unnecessary.

The rocket isn’t going anywhere without crippling Ruby’s Hashes.

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