Topic: Vertcoin - First Scrypt N | First Stealth Address - Privacy without mixer - page 287. (Read 1232734 times)

from: Xardas on Today at 11:31:08 AM
The reason I ask is to make a miner that can handle Scrypt N which needs a lot memory. If an ASIC had a sufficient amount of memory on it or coded to use external memory*, it would prevent the devs of coins like Vertcoin from raising the memory requirement of N too high. Most vid card have 2-4GB of memory and my guess the majority have 2GB, so that would limit how high they can set N without losing vast amounts of miners.




*I had several sha256 miners(which someone bought from me for a ridiculous price) and they would also do scrypt. They weren't very efficient at it because the guys had done some kind of coding that made it work. I can only assume they somehow used external memory(off-chip) that was on the units.

Terry L : i haven't got into the scrypt N coins yet but to put 2GB ram (i would guess you mean sram, not external dram) in one 55nm ASIC is impossible (QFN) at this stage (unless using BGA with a humongous sized chip like the CPU or GPU). it's because ram itself takes huge amount of space. however if you are opting for 16nm and BGA, it might be a good bet but considering the kind of money you have to put into design and development as well as the yield, it's way less economical comparing to gpu.

using fpga and dram is a fine alternative for now.

In the name of being diplomatic and not making a fuss, I've held back on saying anything about this for a while, but now we need to talk about it.

While we've achieved fantastic things in terms of p2pool, and Vertcoin has the highest proportion of p2pool mining of any chain I'm aware of, we do have an issue with one or two pools, as Verters great work has revealed at http://www.verters.com/block-analysis

Namely, bitcrush and vertco.in are both rather too big. I have no doubt they are good pools (after all, so many of you wouldn't be there if they weren't) but that's not the point.

Some of you may believe, because it's called a 51% attack, that you need 51% of the network hashrate to do it. Not so - it's just that if you have 51% of nethash you can _ALWAYS_ do it. If you have less, you have a smaller probability of accomplishing it, in proportion to how small your hashrate is (ie. it's incredibly unlikely, but you could in theory do it with 1kh/s).

Let me put some figures on this for you:

With 25% of nethash (which is what bitcrush and vertco.in both have at present), the probability of an attacker successfully orphaning the commonly used 6 confirmations is about 5%. It rises exponentially though, and if these pools grow to 30% of nethash, they would have a 13% chance of accomplishing that attack. Let them get to 35% of nethash and it's a 28% probability.

On the flip side however, it doesn't take a massive reduction in their hashrate to vastly reduce that probability - for example, with 20% of nethash a pool has only a 1.5% probability of accomplishing such an attack, and at 15% of nethash it's down to a much more acceptable 0.2% probability.

The other issue is, two big pools could in theory collude. I am personally satisfied this is no issue here, because I know that Bushido runs vertco.in and is not about to attack his own coin, but it still is an issue, and we shouldn't need to trust anyone here - the whole point of this is to make things trustless and secure by design.

I'm very proud of the way we've managed to get the p2pool adoption in VTC so strong, but let's not rest on our laurels - there is still much work to be done. Please consider moving if you're on bitcrush or vertco.in, preferably to p2pool.

Remember fees are lower on p2pool generally, payouts are higher and you're helping the network - http://p2pool.vertcoin.org/ will show you all the p2pool nodes that can be detected and selecting one close to you geographically is best (also setting one or two others as failover in your miner config) - the advantages of p2pool are manyfold, including that the pool operator cannot lose or steal your coins either through malice, incompetence or getting hacked, because they never hold the coins (they are paid directly to the miner), also, if the p2pool node you are on fails, you still get paid your shares because they are distributed on the sharechain, and not stored on any one node to be lost due to a failure.

If you don't wish to use p2pool, at least try to join a smaller pool. Ideally I'd love to see everyone using p2pool but that's not realistically going to happen and it's actually not ideal for very small (ie. less than one modern GPU) miners, but even if we could get all the traditional pools down to at most 15% of nethash, that would be a very significant achievement.

I've tried p2p pool for 32 hours and got only 0.5 VTC with an 280x hashing 375Kh/s. My guess is p2p mining is only suited for big rigs right, or have i just been really unlucky?

Open debug window --> Console and type getinfo, then hit Enter. You should get this:

{
"version" : 80602,
"protocolversion" : 70002,
"walletversion" : 60000,
"balance" : 233135.993,
"blocks" : 56208,
"timeoffset" : 2,
"connections" : 8,
"proxy" : "",
"difficulty" : 239.21975703,
"testnet" : false,
"keypoololdest" : 1392498581,
"keypoolsize" : 100,
"paytxfee" : 0.00000000,
"mininput" : 0.00001000,
"unlocked_until" : 0,
"errors" : ""
}

"Blocks" data should be more than 56208

Allow users to set a fixed diff - I will be there.

Yay, after about 4 hours of mining with about 1 MH on p2pools I got 0.037 VTC's. Yipikaye motherfuckers.

After registering; point your miner @ stratum+tcp://vert.composedchaos.net:3338

• Datacenter Hosted
• SSD Hard Drives
• Encrypted webpage
• 0% Fees
• PPS
• No fees for life for new miners!
• 10 Vert blockfinder bonus for next block!

vert.pool.mn invites you to mine VertCoin!
At pool.mn branded pools you will enjoy 0% fee and 100% uptime as ~2Gh/s woth of miners all over the world do!

Hello guys plz help me i can't seem to get my miner working correctly.
I have 3 R9 290 gpus that the modded cgminer says is turning out 1200 k/h total but on every pool dashboard and p2pool it shows a total of 400 k/h.
My total scrypt hash was 2600 k/h so the amount on the cgminer sound kinda correct. I was told to let the dashboard average out after a hour same 400 k/h.
I read on forums saying that the cgminer average is correct so i left it alone for a day and it only generated 1.6 vertoin the amount you get for 400 k/h.
No matter what i do i can't seem to get the full performance of my self only 1/3 of it.

vertminer.exe --scrypt-vert  -o stratum+tcp://vtc.coingolem.com:3333 -u x.x -p x -w 256 --rawintensity 5120 -g 2 --thread-concurrency 6336

What's going on. I get rejecteds in all Vertpools I've tried