So a block has a hash of the previus block + TXIDs. Typically how many transactions can  one block hold.. any rule stating max or min numbers?

BTW amazing job painting a visual picture using words and just pipes and arrows.
But I am still confused about vout. Why are they always 0 or 1 or 2??

Correct me if I am wrong, so there are 2 types of TXIDs.. one's which are receipts of coins received by me and ones which are sent by me.

And the output of :
bitcoin-cli listreceivedbyaddress
shows both types of txids

Correct?

It's funny how a TXID echoed back by the console when one sends coins is the thing itself used to create a fresh new rawtransaction. I used to think a txid echoed back is just like a receipt but it seems it's what is further used to send the coins you once received. Correct me if I am wrong, but blockchain is actually a chain linked with txids.

A question: If I use a txid to create a raw transaction but I still have some balance coins as unspent, can I use the same txid to generate another rawtransaction OR will I need a diff txid ?

Also most of btc mining is pooled wherein the workers work in silos and contribute nothing in maintaining the blockchain. There is just the central node which is both mining as well as validating transactions. The workers aren't validating most blocks. This is an asymmetric situation wherein full node runners get nothing.

Right now the remuneration for full node runners is zero!! If they are rewarded based on unique public IP running for a whole day or some other  provable metric then that would really help a lot. This is one area which some future altcoin might solve and would add one more to the list of 'Why btc is obsolete tech'

So in short, no way to control the fee while using  sendtoadddress or sendmany.
I still need to learn how to generate txid. Any simple explanation as to how to generate that?

Why doesn't the bitcoin network reward full node runners? I know as an ex-miner that miners do most of the job but since full nodes help propagate the blocks shouldn't they be rewarded something? Running a full node DOES cost money. I mean don't give them 12.5 but at least 0.00001 per day/per unique public IP or something!! We all know that solo mining is a bad idea, so what incentive (other than helping the society and being good [ which doesn't make your wallet happy btw ]) does a full node runner have?Wouldn't we see a faster blockchain if we had more full nodes?

Instead of using createrawtransaction, can I use paytxfee or settxfee with sendtoaddress or sentomany and achieve the same reduced fee result?

Rath_, Thank you for responding so quickly to all my queries.

hosseinimr93, Thanks for clearing the confusion. I was under the assumption that sendtoaddress is a dangerous command as well if not used correctly.

So will a new private key and a new address get added to my wallet.dat automatically?
If yes then this is not good, I like to label my addresses in a pattern.

What if I haven't specified a change address?

I have been running bitcoin testnet on FreeBSD for a while and I too am intending on upgrading to a full real node.

Is your machine locally hosted or is it with some VPS/Cloud provider?
I will be keeping a wallet so using any loud service is unadvisable right?

If I have 1 BTC and I I use "bitcoin-cli sendtoaddress " to send 0.1 to someone, is it true that the rest would be charged as fees and I will be left with nothing? I know this sounds crazy but I read that if one doesn't supply the changeaddress option (OR use the  rawtransaction feature  to set a fee), the remaining goes to the miners.

Questions:
1 ] Is the above true?
2 ] If it is then if when I send 0.1 out of 1 BTC, I will be left with nothing right?
3 ] Can I use  sentoaddress (and not rawtransaction) along with paytxfee or settxfee and reduce the fees?

Thanks.

Under bitcoin-core, when one fires the command:
The output is something like:
[ {
    "address": "address-goes-here",
    "amount": 0.00000000,
    "confirmations": 10,
    "label": "label1",
    "txids": [
    ]
} ]


What is the equivalent command for Ethereum (geth)?
I just need to know the number confirmations for an ethereum address while it is receiving coins.
I am running the daemon with indexing.. currently testing on rinkeby.

Nah. I know what a 290x looks like. These are 295x2. with the sticker, serial number, box, the whole shebang. These aren't mine though.
What exactly do you mean by "can loose one gpu"? Do you mean it can just die out before ever being used?
In that case, if under warranty, I can get it replaced right ?

If one of the GPU has just died, shouldn't some AMD utility say so? Shouldn't the GPU Temperature and other utilities detect that one of the component has failed?

It's just so frustrating to see 2 of them underutilized!

It's a 'Devil's Canyon' i7 - Haswell.
Lucky you. My cards never showed up as dual. I am seriously starting to doubt if it's a counterfeit device. Can't imagine who would go through so much of pains to remove so many transistors.. 12.4 billion /2 .. meaning 6.2 bil.. lols

I think these 2 cards could be faulty. I will try to find the serial number and check if AMD offers a lookup for that.

I will remove the power plugs for one of the onboard cards and check.
Thanks.

Yes I have heard about cards burning up rigs and more. I connected the card to the riser and I am surprised and a bit angry as well.
I have 2 cards both 295x2 on the mainboard and they are detected as GPU#0 and GPU#1

This 3rd one on the rise is detected as GPU#2 and wait for it .. GPU#3 ad well !!
Now I had read that each 295x2 has 2 GPUs inbuilt. Does it mean all this time I have been under-utilizing the 2 cards on the mainboard?
I have tried both Linux and Windows.. both of them fail to show the 2 onboard connected cards as dual GPU. I should see total of 6 GPUs 0 to 5 correct? Anything to do with the BIOS settings?

Typically cards connected directly on board with proper connectivity, bus and power should behave and deliver what is expected of them.. and here I have a case where the card on the riser is delivering better output. How? WHY ? I am seriously considering getting more risers and shoving these 2 misbehaving cards onto it!

antantti, The cards you have, are they detected as 2 GPUs each?

Thanks.

I have an AMD R9 295X2. Is there more than just one type of this card? This was a so called "enthusiast's card" So I doubt if there were other manufacturers.

I will try to use the card without powering the riser as you mentioned, although on a separate thread I heard a different answer. Would it be possible for you to send me a picture / ipload it somewhere of the same.
It could be very well the case that we are having different types of risers. One you have must be having an additional USB port just to supply power to the riser.

Thanks.

dddrgonzooo, The card does have rectangular metallic gaps but the problem is I will still need to keep the cooling fans attached to the cards on a flat surface somewhere. I have very little faith in the sata to 4-pin cable provided by the riser. When I plug it into the riser board I don't even get that reassuring "tick" sound that it has gotten connected properly.

Thanks everyone.

Somewhere during 2013 a new pool for mining Litecoins called mining-foreman.org was announced:

Links:
https://bitcointalk.org/index.php?topic=233779.0
https://twitter.com/miningforeman

I mined a few LTCs and I never withdrew them into a private wallet. It wasn't worth much back then.
Today I tried to visit the website. As expected it's gone and so are my coins I guess.

Was this incident ever announced on the Internet or on this forum? I know a lot of small stratum runners (just like some exchanges)
do the same, pack up, close shop and steal away all the pending payments but I am curious to know
if mining-foreman.org moved to a different website after announcing it or did they just disappear? 


Thanks.

I have an extra Radeon R9 295X2 box lying around since years !!

After I mount that card onto a USB riser and provide power from the PSU to the card using proper cables (just like the other mounted cards on the mainboard),  do I need to provide SATA power to the card as well?
The riser has a 4-pin power cable to SATA cable. Do I need to use that as well?


Also any suggestions on how and where do I place this bulky card. Is it okay to just keep the card on a table? It has a decent cooling system but I am worried about it's physical  balance.

Which game needs so many GPUs that one would need a riser? Yes, a GPUs-as-Gaming-Services { G.A.G.S. }  cloud perhaps ?