Some pools get "lucky" on certain days.  Statistically it's just not possible for one pool to consistently "pay more", all things being equal.

Exxxcellent.  This will come in handy when I get all of the long-polling implementation bugs worked out.  Thanks!

Nice!  You should open-source that.. I was just pondering making such a thing for my AP9211s

I agree, I'd use Slack for everything if I could.  I mentioned JSON because in PHP versions prior to 5.3 you have to install it separately.  I asked cdhowie to mention this somewhere as a dependency, as to cut down on potential support issues, but I guess it's still not in the docs.

Slackware?  Heh I'd hang it up.  I don't even bother trying to run anything meaningful on it (i.e. above basic apache, php and mail).  I love slack, been an avid user since version 3.3 (circa 1996).  But it has very little utility.

I can also confirm that this package, as it sits, is very distribution-specific.  It runs out of the box on Cent 5.6 but is broken on FC14x64, have not had the time to troubleshoot further.  Out of curiosity, have you installed json for php?

Thanks for the contribution to the community!

That's not necessary.

I guess you've never heard of Linux..

Interesting.  This rivals some scripting that I did for my mining rigs, but it looks like your implementation with 'sendEmail' is easier than mine with 'nail'.  Thanks for the contribution!

I again saw 12 blocks generated in an hour yesterday, during a time when Deepbit was offline.  This is way outside the normal statistical variance, given the loss of hashing power.  It doesn't just rain packets out of the sky; it's pretty clear to me that the two are directly interconnected.

Sweet.  I have what looks like a working implementation, minus the aforementioned difficulties with long-polling that me and several others have experienced.  But it wasn't in use today for that reason.  I'm hoping to find a simple http proxying script and just change the LP URL handed out by cdhowie's script, to make the miners hit a different script to handle long polling in a non-problematic way.  Or so I hope.

Yea I saw this happen with my last 2 payments from deepbit.  The one yesterday was sent instantaneously, but had 0 confirmations for like 8 or 10 hours.  It did not show up on blockexplorer either.  So it looks like it wasn't included in a block.  I'm just wondering why it would take another 60 or 80 blocks for the transaction to be "picked up" in the block chain, rather than being picked up in the second, or third, or fourth block.

My other transfers (with 0 transaction fees) to/from others have not been affected thus far.

It damn well ought to.  From a business perspective, anyone mining with one of the affected pools (regardless of their reasoning) had their cost of doing business go up severely (akin to breakage/spillage/etc. from a manufacturer's perspective).  Those outages, from my vantage point, have affected operations for a quarter to half of a day.  Said another way, a quarter to a half of a day's production has been lost by people using those pools.  Furthermore, difficulty is such that it is statistically unfeasible for those miners to have switched their hardware over to solo mining, as you can't make up the difference in half a day assuming an average mining setup (average in my mind is 1 or 2 GH/sec).  Even if you had (what I consider to be) an "above average" setup with 15 Ghash/sec or so, your average block generation time running solo is still a day or more.  So yes it should drive the price up.

Although your question was not should it, but will it.  The problem is miners are essentially kids.  Note that I didn't say minors, I said kids.  As in, someone with the mentality of a child.  That's the only way to explain the kind of irrational exuberance that you see with people dumping gobs of money into mining.  It looks like the kiddies will continue to sell their bitcoins at the severely undervalued price of $8.30ish.  I say severely undervalued because I believe bitcoins will go to $1000 in 2 or 3 years, and the kiddies will realize they could've been millionaires by holding on to what they minted with spare video cards and free electricity in mom's basement.  I can't help but think of the story of Easu, the guy who sold his birthright for a bowl of soup.  But I digress..

For those of you affected by deepbit/slush outages today, how well did this code hold up for you?

At 8pm EST there were 14 blocks generated that hour, between 8pm-9pm.  That'd easily account for a large spike, as the average at this moment according to bitcoincharts.com is 6 per hour.  Not sure how much of a window, time-wise, that they use to make this calculation.

Closely related, I'm seeing wild variations in the amount of time it takes, within each hour, to find blocks (whereas in times-past the finding of blocks seemed to happen at much more regular and predictable intervals at the lower difficulties).  Earlier in the day there were hours when only two or three were found.  A far cry from 14.  If anyone cares for the raw data i'll include it below, all times EST beginning at 8pm.  Also is there some site that lists all, or a large set of the blocks, historically?  I'm only seeing the last few on blockexplorer.com.

---

20:07
20:10
20:17
20:17
20:20
20:24
20:43
20:48
20:49
20:49
20:52
20:53
20:57
20:58
21:00
21:10
21:21
21:22
21:47
21:57
22:01
22:36
22:38
22:48
23:03
23:07
23:09
23:14
23:57
0:28
0:29
0:41
0:47
1:04
1:12
1:13
1:30
1:31
1:36
2:08
2:26
2:28
2:31
2:33
2:34
2:47
2:48

To add to this, I would think regular plywood for the partitions, assuming the original scheme as depicted in the OP's drawings is used.  You could go as far as to space the plywood off of the shelving with a 2x4, this would give you almost 2" that you could use to staple insulation to the inside of the plywood.  You can hinge the plywood at the top, where it fastens to the 2x4 beam, to make the shelves accessible by simply flippling the plywood up.  If the shelves are made of a solid material as-depicted, I'd envision ventilation ducts for input and output attaching to each side of the shelf ends (so at a 90 degree angle to the plywood which runs the length of the shelf, input at one end, output at the other end).  This would also be extremely easy to build up and test because you could do it with just one level of one shelf.  If you settled on a good vendor for the fans (like some place akin to Walmart) which sold fans with a rated CFM, you could test, adjust, test some more, and have a pretty good idea of how your system will perform using the delta T calculation provided above.

But that's merely conjecture, and math is hard.  It's much easier to just go shopping for video cards and ignore the details.. yanno?

My post was loads of help to anyone considering doing the same thing - quite simply - to go it alone is ridiculous.  It was based on the insights gained by building and operating Internet datacenters for the past 6 years.  And it'll be even more helpful when the OP comes back and says "omgosh, I had to shut off rigs during the day because my room was 40 degrees hotter than the outside air during the peak of summer!".  It is you who are trolling, but your naiveté precludes you from realizing the same.

The OP mentioned "FEDS".  I knew he was Canadian and rightfully assumed he was referring to the Royal Canadian Mounted Police, a federal police service.

It is you who'se put his foot in his mouth.  Good day sir.

You're coming to a forum to ask for advice on how to cool this room of yours.  A forum!  Not to an engineer, not even to an HVAC tech, but a forum, where the overwhelming majority of the users are not HVAC design engineers.  At best, you might find someone familiar with the laws of physics (see above) or someone who's actually designed and built datacenters for a living (I happen to fall into that category).


I've seen this time and again in the web hosting business.  The people who run to forums for advice _first_ are the ones who _do not_ have a budget to talk to an engineer, and _are indeed_ over their head.


You have yet to define what "work just fine" means exactly.  If that means 5 degrees (Celsius) above outside air temp, not likely.  If that means 20 degrees above outside air temp, you might have a shot.  


That's ridiculous.  All you've done is put yourself on their radar.  Please do report back to us how your project goes, and at what point the feds do show up.

If that's _really_ a concern, common the two PSUs up by strapping their chassis together to put them at the same ground potential.  But I think you're off-base.  The OP could alleviate this concern by ensuring the use of properly grounded outlets, and that both PSUs are plugged into a common source (i.e. the same power strip).