I'm suspicious because it is *exactly* what it would look like if somebody was engaged in selfish mining.

1)  PPLNS doesn't do "payouts per block", it does payouts per shift.  There's significant details available for every shift if you click on the 'Details' link under PPLNS Stats.  The dashboard has an approximation since users tend to associate payouts with blocks, but that is not the source of your payout, the shifts are.

2)  PPS is cumulative per difficulty.

This would be the correct response.  Both of those blocks ended up being orphaned...which makes me suspicious as hell.  GHash.io has been orphaning a LOT of blocks lately by releasing 2-3 blocks on top of each other.  In both of those orphans, blockchain.info saw our block before GHash.io by a decent margin (12 seconds on the first one).  That's not the block timestamp difference, it's *when* the block was seen (Received Time).


3 orphans in the last 24 hours, all either with a competing ghash.io block (or "unknown/IP relayer"), and all 3 of them ended up having Ghash.io be the one that confirmed the fork against BTC Guild.  All 3 of them were seen by many other nodes on the network as BTC Guild being the first block at that height.

This is getting pretty bad...I have a strong indication of what website has had at least a partial database leak to produce this email list being used for the phishing attempt...and its an exchange.  Waiting on more confirmation and I've sent a notice to the exchange, but odds are I'll never get a reply.  I will update once I have received enough confirmations.

Looks like somebody is piggybacking on an old database leak from a Bitcoin site (probably MtGox or Bitcointalk) and sending a phishing email from "support@btcguild.com" (it is not coming from any of my servers, it is fake).  It mentions trying to contact you over a failed transfer and has a link to an "attachment" (virus).

Obviously it's a damn fake, but I've gotten over 70 email replies from people this morning, and a good portion of them are believing the contents or providing extra information.


This is NOT coming from a leak of email addresses at BTC Guild.  I have about a dozen replies from people stating they have no account with BTC Guild.

Looks like somebody is piggybacking on an old database leak from a Bitcoin site and sending a phishing email from "support@btcguild.com" (it is not coming from any of my servers, it is fake).  It mentions trying to contact you over a failed transfer and has a link to an "attachment" (virus).

Obviously it's a damn fake, but I've gotten over 70 email replies from people this morning, and a good portion of them are believing the contents or providing extra information.


EDIT/ADDITIONAL INFO:  This is NOT coming from a leak of email addresses at BTC Guild.  I have about a dozen replies from people stating they have no account with BTC Guild.  I'm sure if I scanned through all the email replies and compared them to my database there would not even be a 50% match rate.

If you're seeing an error page saying that the "Host" (BTC Guild) timed out, a good way to see if it's Cloudflare's fault is to try to load www.cloudflare.com .  If it's extremely slow, you know it's something on the Cloudflare route near you.

It's Cloudflare's end.  Mining is completely unaffected, and for MOST users the website is fine.  It looks like a large region or two are having Cloudflare outages right now (even Cloudflare's site is down for me).

Yes, there's a few quirks to 24-hour earning stats for PPS users.  It should correct itself in about 18 hours once the changes have been in effect for 24 hours.  However, 0.2 to 0.36 isn't too big considering luck if you go from a bad day to a good day.

Some scripts used for logging speeds are being updated.  Pool speed/dashboard speeds may be incorrect for a few minutes.


UPDATE #1:  Just pruned out more than 75% of the data in the worker graphs section and worker speed estimation tables, and sped up those queries by more than 10x.
UPDATE #2:  Charts have been forced to do a full reset, expect them to start regenerating over the next 2-6 hours.
UPDATE #3:  Rankings speeds now reflect the previous PPLNS shift average speed for each user.  PPS users do not register on the Rankings.



Overall:  Drastic improvements to what have always been the slowest scripts on the site.  A few quirks may appear over the first hour or two while the tables rebuild with fresh data.

Might be going public beta with it in a day or two.  Profit switching has been running well all night, we're at the point where the pool needs more speed in order to add more coins and profit switch to harder ones.

ScryptGuild alpha now supports seamless coin switching via the website interface.  Change between coins manually without losing a single hash (no disconnects, no interrupts, it just works).

Automatic coin switching is now also running, currently switched by the administrator regularly, but will be automated with the first version of a profit-switching algorithm this evening.


Currently available:  DOGE, FRY, KDC, LEAF, LOT, NOBL.



As soon as the pool goes public next week, many more coins will be made available as the pool speed grows.  The recent updates allow new coins to be added to the pool server without any restarts required.

Awesome .  I've been experiencing the joy of block solving recently on ScryptGuild.  I have my old gaming rig running at ~1 MH/s.  We've been sticking to easier coins until the pool goes fully public.

If anybody is wanting to mine ScryptCoins, join #scryptguild on Freenode IRC.  The scrypt pool has been progressing much faster than originally planned.  This evening the system was updated to be able to add additional coins on the fly with no pool restarts.  You point at a single URL and can change what coins you mine via the website without losing a single hash (no disconnects/interruptions, it just works).  Automatic coin switching is also being worked on.  Currently it's manually controlled by me if you're set to Automatic, but by tonight it will have the first version of automatic profit-based switching.

ScryptGuild (Alpha)

ScryptGuild has added Leafcoin to its system.  ScryptGuild is currently in alpha testing as new features are being added rapidly, but mining for previous coins has been stable with no unplanned downtime.  The servers were recently updated to now be capable of adding new coin chains without restarting the pool, and miners can seamlessly switch between coins without losing a single hash.

Murphy's law at work.  This is why I don't even get into my car without a laptop and 3g/4g hotspot.  My biggest fear over the holidays was something happening during the drive between California and Nevada in the areas where you can't get enough signal for internet access.  It really sucks on holidays though .

Yep.  It's keeping me awake at 2 AM right now, even though I know I'm powerless to do anything about it.


EDIT:  And as usual, as soon as somebody mentions the long round, a mysterious block appears!

My goal is, even if BTC Guild shrinks as more and more massive private farms come online taking a larger chunk of the mining pie, to keep our shift N value at least 10% higher than network difficulty.  This provides a total 'N' value of 11x difficulty, which is a length I don't believe BTC Guild has ever seen a block take (I think it has only happened once out of any pool in the last 3 years).  Obviously there is always a balance of maturation time for shares vs variance

Thanks, updated it to not give a number since it does tend to change every 1-3 weeks.  It's been a LONG time since I updated that snippet on the support page.  Shifts are currently 3.5 billion *per shift*, 35 billion for the 10 open shifts.

Updated to 12-hour time format.

Funny enough, BTC Guild hasn't been affected by transaction malleability.  Maybe it's my accounting background, or maybe it's common sense, but my system doesn't rely on your transaction ID getting confirmations before marking it as paid on your account.  If I push out a payout, the payout has already been marked as sent in my system before the actual push to bitcoind.  You can fix a failed payout.  You can't fix/reverse a double payout.



BTC Guild represents one of (if not the) largest group of miners.  We have fallen from 1st place in terms of raw speed.  However, GHash.io's last statement was that 45% of their speed was their private farm (cex.io).  BTC Guild itself has no private hash rate.  My ASIC collection consists of a single Avalon and a dozen USB Block Erupters, none of which are currently running.  Eligius has passed BTC Guild on occasion in the last week, because it now has 2 users that represent approximately 35-40% of its entire pool speed.  BTC Guild has some power users, yes, but the largest one is not even 8% of the pool.  The top 5 users represent approximately 20% of the pool, and then it drops *drastically* after that.

That looks pretty close to what I used on my old ASICMINER USBs.  I know the arguments have changed with newer versions of bfgminer though (now you just use -S erupter:all and ignore the --icarus stuff).