[ANN][BLC] Blakecoin Blake-256 for GPU/FPGA With Merged Mined Pools Stable Net

[Vorksholk]

Well after 6 days (almost 7 days now) mining with 3 x 8 core cpu's i give up with 0,0000000000 blocks found

My i7 3770k + amd fx8320 and my E5-2690 have not found 1 accepted single block

Yes i got many unconfirmed but all of them disappeared

Its ammazing that i see almost every 10 minutes a new block being found, however non are being found by anyone other then those special people getting them all

I still have the enormous amount of 12.5 coins which i got from the give aways

I try not to think how much the price in electra it has cost me, but it will not be pretty

Ouch Seems like someone has a GPU miner or a ridiculous amount of cloud power.

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[jpp1975]

had same issue, i7, no blocks found at all. had no issue with qrk, src, or even cpr. as much hashing power as ive used, pretty strange

[Vorksholk]

I got quite a few blocks in the early days, but since the 12th, haven't seen anything. Only got one block on the 12th.

[jpp1975]

seems like an interesting coin, I was about two days behind, blakecoin wasn't posted on the 3 forums I go to so I didn't even know about it til it was posted here. still, I would have thought with no pools, p2p or otherwise, I could have at least found one block. but that's the way it goes I guess, good luck mining...

[BlueDragon747]

using the reference cpu miner I have mined with 8 machines ~ 24MH/s = 4 blocks since the 10th so that is <1 block a day  
on kramble's FPGA miner ~ 60MH/s = 1 block in past 2 days  

when EC2 had an outage the other day the difficulty dropped to 1/5 of the stable rate it had been, so my guess is still on a large EC2 CPU miner  

[maxsolnc]

using the reference cpu miner I have mined with 8 machines ~ 24MH/s = 4 blocks since the 10th so that is <1 block a day  
on kramble's FPGA miner ~ 60MH/s = 1 block in past 2 days  

when EC2 had an outage the other day the difficulty dropped to 1/5 of the stable rate it had been, so my guess is still on a large EC2 CPU miner  

I wanted just to make an experiment, created 1 88-ECU (32-CPU) instance, ran it for 3 hours - no blocks. So there should be hundreds of such instances...

[BlueDragon747]

using the reference cpu miner I have mined with 8 machines ~ 24MH/s = 4 blocks since the 10th so that is <1 block a day 
on kramble's FPGA miner ~ 60MH/s = 1 block in past 2 days 

when EC2 had an outage the other day the difficulty dropped to 1/5 of the stable rate it had been, so my guess is still on a large EC2 CPU miner 

I wanted just to make an experiment, created 1 88-ECU (32-CPU) instance, ran it for 3 hours - no blocks. So there should be hundreds of such instances...

no idea how many but when EC2 had an outage we had the drop in difficulty?

like kramble said it is possible that someone could have a GPU miner already and is not releasing any source code or binaries.

but atm it is just me and kramble working on open source stuff for Blakecoin and it has only been released just over 1 week 

If I had done more of a pure clone and it not changed as much of the hashing to Blake, then Blakecoin could have been more compatible with the current software for Bitcoin e.g like LTC/QRK/SRC/CPR that have only really changed the POW rest still uses sha256d see: hash.h in the wallets for these changes, so I have created more work for myself and it will take as long as it takes to get it done and I am working on it every days so far since release 

but now we have 2 types for hashing on a network level SHA-256d and my Blake-256 mod. even if they use Blake-512 or Keccak-256 or any other hashing you can name for the POW they are still the same on a network point of view. (just checked Litecoin is still uses SHA-256d for network)

so if you have to rebuild your wallet data for Blakecoin it will be super fast compared with Bitcoin due to the changes at the network chain level e.g SHA-256(SHA256(data)) vs Blake-256(data) but this also effects all the checks and those are the things I am currently rewriting for p2p

I do not have any real control over what people are mining with or how they are finding block so quick 

Please be patient I will get p2p and the GPU miner done soon as I can   

From Litecoin wallet same as Bitcoin:

template<typename T1>
inline uint256 Hash(const T1 pbegin, const T1 pend)
{
    static unsigned char pblank[1];
    uint256 hash1;
    SHA256((pbegin == pend ? pblank : (unsigned char*)&pbegin[0]), (pend - pbegin) * sizeof(pbegin[0]), (unsigned char*)&hash1);
    uint256 hash2;
    SHA256((unsigned char*)&hash1, sizeof(hash1), (unsigned char*)&hash2);
    return hash2;
}

From Blakecoin wallet:

template<typename T1>
inline uint256 Hashblake(const T1 pbegin, const T1 pend)
{
    sph_blake256_context     ctx_blake;
    static unsigned char pblank[1];
    uint256 hash1;
    sph_blake256_init(&ctx_blake);
    sph_blake256 (&ctx_blake, (pbegin == pend ? pblank : static_cast<const void*>(&pbegin[0])), (pend - pbegin) * sizeof(pbegin[0]));
    sph_blake256_close(&ctx_blake, static_cast<void*>(&hash1));
    return hash1;
}

as you can see it is totally different to the others, this is creating a lot of rewrites in functions in all software not just a change to the miner!

SHA-256d is not totally gone from Blakecoin it is just most of the bulk of the hashing is done in Blake now which seemed a good idea as it is more efficient and faster, but due to so many clones of other coins about everyone is expecting me to just be able to change a few lines of code and it works, well this is just not the case with Blakecoin and I do feel like I am under quite a bit of pressure to get it done quickly

Edit:
maybe I did not sleep well last night or not had enough tea but I am a little on the grumpy side this morning

[kramble]

Well after 6 days (almost 7 days now) mining with 3 x 8 core cpu's i give up with 0,0000000000 blocks found

My i7 3770k + amd fx8320 and my E5-2690 have not found 1 accepted single block

Yes i got many unconfirmed but all of them disappeared

Its ammazing that i see almost every 10 minutes a new block being found, however non are being found by anyone other then those special people getting them all

I think it depends on your network connectivity. When the 0.8.6 patch was released on Sunday I rebuilt my blockchain from scratch on a new machine but the block chain forked! I was still running 0.8.5 on my other box, and the two chains were running in parallel. It took about six hours for the "new" chain to reconnect with the "old" one and the reorg orphaned around 50 blocks (two of which were mined by me, though the diff was lower so I probably didn't lose out).

I suspect this is an issue at the moment due to the low number of miners on the network, but perhaps some additional seed IPs in the config would help (I'm not on a static IP, so I can't volunteer here).

Anyway my single Lancelot FPGA board has mined a total 11 blocks since I started mining 24/7 four days ago, so I'm not the one sitting on the big pile of loot.

[maxsolnc]

Edit:
maybe I did not sleep well last night or not had enough tea but I am a little on the grumpy side this morning

Don't be grumpy, dude, you're doing an excellent work!  I don't think that several days (when someone mines with big EC2 or his own unreleased miner) will make any harm to the coin.

[bronan]

Well i believe a large power on rented cpu farms like EC2 could be possible
But this is far beyond the hashpower of cpu's
This is more like a large gpu farm, then again bfl had sold fpga devices which was pretty fast
For instance some on bitminter had almost 200 Gh fpga power

On quark many people switched to mine them on EC2 rentals as well that gave us a dent in receiving coins as well
But even with some who rented hundreds of contracts i got minimal 4 to 12 blocks on my cpu's on a day.

However since i do not have any fpga and no miner which i can use on gpu, i will forget about this coin.
In my view the coin is no longer a point of interrest to me

The happy few who got in early and those getting the coins now are laughing their asses off.

Its basically the same as a premined coin, a few persons getting all the coins and all others get close to nothing.

Your wrong there IT does hurt the coin

[BlueDragon747]

Well i believe a large power on rented cpu farms like EC2 could be possible
But this is far beyond the hashpower of cpu's, but then again bfl had sold fpga devices which was pretty fast
For instance some on bitminter has almost 200 Gh fpga power

On quark many people switched to mine them on EC2 rentals as well that gave us a dent in receiving coins as well
But even with some who rented hundreds of contracts i got minimal 4 to 12 blocks on my cpu's

the difficulty push on Blakecoin was within 2 days of release on this forum!

Mr Big is quite a solid amount of hashing power not sure about it being FPGA have you tried to build a design with Xilinx ISE?, it often takes longer than this to even build a decent high Fmax design with Xilinx ISE let alone program it to the boards, I was amazed kramble was able to do it so fast but he did base it on his current FPGA Litecoin miner

[kramble]

Mr Big is quite a solid amount of hashing power not sure about it being FPGA have you tried to build a design with Xilinx ISE?, it often takes longer than this to even build a decent high Fmax design with Xilinx ISE let alone program it to the boards, I was amazed kramble was able to do it so fast but he did base it on his current FPGA Litecoin miner

The current build was quite quick (just an hour or so), but I've been running one overnight to try to get a better FMAX and its still stuck at phase 4 with a hundred or so routes to go (and then it will start all over again at phase 5 to try to improve the timing). I think I'm going to abort it and try another setting on the dial ... this is the frustrating thing with the Xilinx devices, it takes many, many long compilations to get a good result, and its all chance (just like mining hashes really).

You should be getting better than one block in two days. Did you do the frequency characterization? The default build runs at 25MHz, but it should clock up to 55MHz or more. Just make sure its returning good hashes (all zeros for the last 8 hex digits). I get around 1250 diff=1 (old diff=256) hashes per 24 hours (and perhaps 2 to 4 of these will be accepted, yay!)

[BlueDragon747]

Mr Big is quite a solid amount of hashing power not sure about it being FPGA have you tried to build a design with Xilinx ISE?, it often takes longer than this to even build a decent high Fmax design with Xilinx ISE let alone program it to the boards, I was amazed kramble was able to do it so fast but he did base it on his current FPGA Litecoin miner

The current build was quite quick (just an hour or so), but I've been running one overnight to try to get a better FMAX and its still stuck at phase 4 with a hundred or so routes to go (and then it will start all over again at phase 5 to try to improve the timing). I think I'm going to abort it and try another setting on the dial ... this is the frustrating thing with the Xilinx devices, it takes many, many long compilations to get a good result, and its all chance (just like mining hashes really).

You should be getting better than one block in two days. Did you do the frequency characterization? The default build runs at 25MHz, but it should clock up to 55MHz or more. Just make sure its returning good hashes (all zeros for the last 8 hex digits). I get around 1250 diff=1 (old diff=256) hashes per 24 hours (and perhaps 2 to 4 of these will be accepted, yay!)

1st day did the standard 25Mhz(~600) and found 1 block overnight last night did 50MHz(~1000) but didn't find any. Tested and it is producing valid hashes but was just not lucky last night

[110110101]

One has to be really lucky now that the diff is over 800 again.

[trinsic]

Eh 6 orphans in a row, what's going on.

[BlueDragon747]

Eh 6 orphans in a row, what's going on.

did you update to 0.8.6?

how many connection are you getting and what block are you on?

also 6 blocks what is you hashing power?

I only got 2 blocks from about 90Mh/s last night 

[trinsic]

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About 120MH/s.

[BlueDragon747]

About 120MH/s.

Strange that you got so many, only a couple of them are even close to each other 

check the system time make sure it is a correct as Blakecoin is a little more sensitive to timing still would give you a warning if it was too far out

I take it you are on quite a fast internet connection, if you could check your ping to the main nodes that can help me identify any latency issues but will still look into it before the next wallet update

[melnikalex]

qt-blakecoin behave not stable, as it stucked sometimes and do not load new blocks from other peers, until restart.
maybe it stucked on your pc and you got forked chain? or maybe someone stucked qt was restarted and has chain longer than yours?

just my thoughts

[BlueDragon747]

qt-blakecoin behave not stable, as it stucked sometimes and do not load new blocks from other peers, until restart.
maybe it stucked on your pc and you got forked chain? or maybe someone stucked qt was restarted and has chain longer than yours?

just my thoughts

thought I had the stuck wallet fixed in 0.8.6?

it is possible that the network had a longer chain and rejected the blocks  

please keep reporting any issues I do always look at them and add it to my list to help improve Blakecoin  

also if you find a solution to a problem please post as it may help others