Topic: [ANN][GRA] Graincoin - New PoW/PoS coin | Fast, secure | Version 1.5 Released! - page 34. (Read 177059 times)

Yes. By the way. The PoS difficulty doubled since block 130000 and PoW difficulty now again between 1 and 2. That means we got more people involved.

Seems to be holding pretty well, need just to increase volume...

Actually Grain shows steady price growth with some spikes when somebody decides to get into.

Long-term coin to hold. Stable price and new services weekly.

Nice coin, diff a bit high, not sure how profitable the coin is...

I see, this makes sense. Thanks.

bobbyb is talking about pool/share diff, not GRA network diff. The shares that the pool is offering are of too high a difficulty for his hashing speed, so his miner is often still working on solving a share when the network (or pool) finds the block solution. He gets paid zero for that block since he didn't submit a completed share, even though his miner has done SOME work on it.

OK, thanks for clarifying. Unfortunately we can not fix the diff. The diff is determined from the previous real block time.

I am not sure the recent diff increase is due to more hashpower, or if it is due to an algorithm issue. I am more thinking of the former, as the current price of GRA make it possibly one of the most profitable coin. The team is looking at this problem. Again, we can not fix the diff, otherwise you may get every second a block, it will mess up everything.

The current block time is about 20 sec, that's why the diff is going up. But if you look at only PoW block, it is about 40-60 sec as block time, which is pretty reasonable. Though there are certain orphans, the minted block count is reasonable and within the designed range.

The problem you described is why we need a pool. And the time to find a block is not fixed, it is random.

Dear Bosian,

I didnt say, that the pool steals the coins.
I said, that the share difficulty of the pool jumps too high for my miner (300-400 Kh/s), so that I cant compute the shares fast enough for the short rounds.
This means, that when the round only takes 10 seconds and my GPU needs 20 seconds to find a share of min. 128 share difficulty, then I get nothing from this round, because i didnt submited any shares.
If the share difficulty would stay at 32, then my miner would be able to find those shares faster and get also payed for the short rounds.

share diff 32 = 0,00048828125 diff
share diff 128 = 0,001953125 diff
share diff 256 = 0,00390625 diff

Those share difficulties may work for slow miners for 2.5 for 1 minute block target coins, but Grain has at the moment a block target of <20 seconds (pow and pos).
Many rounds only take 1-5 seconds on forkpool, this is too fast for my miner to find shares at such high share difficulty.

Image if the last round took 1000% of the estimated round time and found a normal block and then the next one only takes 5% of the estimated time and finds a superblock.
This would be a nice compensation, but no. The share diff was too high, your miner didnt find any valid shares for this round due to the high share difficulty and you get nothing for the short round.
Have fun with the next long round...

And you cant solo mine with such a slow miner, because you get >50% orphans.

I am only asking the pool operator for a lower and stable share difficulty.

But from the blockexplorer, this is the trace of the 1415 coins from block 150314:

minted at block 150314, sent to 9Kvkbie3addSc3PGpdcQyKumQBRFKkSV2R.
Then later, the 1415 coins are sent from 9Kvkbie3addSc3PGpdcQyKumQBRFKkSV2R to two other addresses:
9Cji8S3hzCmQJUjFfWkoe8XggTkLtrgnKY: 194.553719
9CKy36m54nMYAx66NsgnrKr47J18uzggvM: 1220.426281

The transaction is
http://coinblockchain.com/grain/block/000000001ab18da64639ad270f9bea52a108a3d77b9d9707b26712d78c7841bc

and you can follow the links to further track where are these coins.

So your GPU has to rest a bit...hehe..

I got nothing for this round, because the share difficulty was too high and I didnt submited any shares for this round.
Yes it is a pool, its forkpool. A share difficulty of 32 or 64 would be nice. Vardiff jumps to 128 or 256 are too much.

hmm interesting. I took a look at a particular block (block 150314) that you said not received. When I look at the block explorer, it says that the block 150314 is paid 1415 coins and sent to address 9Kvkbie3addSc3PGpdcQyKumQBRFKkSV2R. This address receives it:
http://coinblockchain.com/grain/address/9Kvkbie3addSc3PGpdcQyKumQBRFKkSV2R

looking at the activity of this address, it is a pool address. Then after some time, the coins 1415 are transferred out of the wallet (at block 150377). This is cleared a transfer out, as it paid 0.02 GRA tx fee.

I saw a lot small transfer out, is your wallet secure? hope it's not transferred out by a bot. (Note: I looked at it again, it's the pool payout to miners). And it looks like a payout to the miners. So anyway, the block 150314 is fine, you should have received its coins and already paid out to miners.

The share difficulty jumps still to 128, this is too high for 330 kH/s and 20 sec. block times (at the moment even 14 sec!) and average round times of 70 sec.

Hope this will be fine. Sometimes the CPU usage from pos mining can be extreme, but usually it is fine, like my wallets they mine pos every 1-2 weeks, and do not take much CPU. In most case they do not mine by themself as I guess there's no qualified coin-day available in them.

One more shop accepting Graincoin:

Crypto Coin Stuff - Cryptocoin banners, stickers etc
http://www.cryptocoinstuff.com


we now have 14 shops/services accepting Graincoin (listed in OP).

From 11PM to 10AM (for 11 hours),
I have found 14 blocks, and 11 blocks have been validated, and 3 blocks have been invalidated due to orphans.
I think, after fully restart, it work normal again,

Anyway, I do not know why I have been in local(?) fork,
But, Maybe, I have found the solution,

First Trial [3 hours, Diff 0~1]
     Remove all file (block information and peer information) from %APPDATA%\Grain
     and, I have synced all again,
     But, just orphans only,

Second Trial [6 hours, Diff 0~1]
     I have repair wallet
     But, just orphans only,

Third Trial [11 hours, Diff 0~2(mostly 1)]
     Move all coins into the other wallet such as coinedup wallet,
     and, I have remove %APPDATA%\Grain
     and, I have synced all again
     and, I have return my coines from the other wallet to local
     Now, It have been started working again

I am not sure the reason
    (1) wallet.data has some problem ?
    (2) any squence of records create a problem ?
    (3) block data in my local computer has problem ?
    (4) specially diff has affect on my computer ?

But, I have a solution,
     IF GOT JUST ORPHANS FOR LONG TIME,
     REFRESH ALL

Thank you...


P/S : between each trial, I have lost some hours,
        for sync blocks again,
        and testing and testing,

Thanks... I will give it a go

  having same trouble, mostly when another running wallet grabs the focus. try: task manager>processes tab>sort by name, right click [grain]>set priority>DO NOT USE REALTIME  

usually works for me, the realtime setting freezez my comp.  

I am having a lot of trouble running the 1.4 wallet with minting.  I am running windows 7 and if I unlock it for minting it goes to non responsive.... Any ideas?