【新聞】Folding@home : 2008

包含 Folding@home、Malariacontrol.net、POEM@HOME、Predictor@home、Proteins@Home、PS3GRID、Ralph@home、Rosetta@home、SciLINC@Home、SIMAP、Superlink@Technion、TANPAKU 這些專案
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【新聞】Folding@home : 2008

文章 richer » 2008-01-06 01:01

各位好:
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Misc GPU comments

文章 NEWS BOT » 2008-01-06 04:10

NEWS LINK ::
http://folding.typepad.com/news/2008/01/misc-gpu-commen.html

NEWS ::
People have been asking a couple of questions about the new GPU's.  A few added notes:

we will support the 2xxx and 3xxx class ATI cards

ATI's CAL *may* support linux in the future (see http://ati.amd.com/technology/streamcomputing/faq.html for some details).  If they do, we will look into Linux support for FAH/GPU as well.

We are investigating ports to NVIDIA, but have nothing to say at this moment.  For now, we support only the ATI cards.

I hope to have more to say.  Q&A will take some time, so please hold tight!
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Update on new GPU core

文章 NEWS BOT » 2008-01-06 04:10

NEWS LINK ::
http://folding.typepad.com/news/2008/01/new-gpu-core-up.html

NEWS ::
Several people have been curious about any news regarding a new GPU client/core.  We hit a few snags and then hit the holiday break, but the team is back
now.  We have the new client running in our lab
and we're doing some final Q&A on it. The new code is running on the latest ATI cards (2xxx and 3xxx) and getting pretty good performance so far. The performance is pretty
good now (after some optimizations from Mark and Mike H.), so I'm
optimistic. This does not look like a 6-month delay, more like a few
week delay, but it's hard to tell -- you can't predict the
unpredictable things which can come up. 
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Netxplorateur

文章 NEWS BOT » 2008-01-19 06:05

NEWS DATE ::
 2008-01-18 20:56
NEWS LINK ::
 http://folding.typepad.com/news/2008/01 ... ateur.html
NEWS TITLE ::
 Netxplorateur
NEWS INFO ::
Folding@home has been honored as a Netxplorateur in France (see http://www.netxplorateur.org/ for details).  This award has been given to FAH based on our work in developing a distributed computing network to address protein folding and misfolding related diseases.  We'll post more information as time goes on.
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Random thoughts on the superbowl and statistics

文章 NEWS BOT » 2008-01-24 06:05

NEWS DATE ::
 2008-01-23 15:59
NEWS LINK ::
 http://folding.typepad.com/news/2008/01 ... ughts.html
NEWS TITLE ::
 Random thoughts on the superbowl and statistics
NEWS INFO ::


Being an avid fan of the NFL, I do read a lot of the articles about the upcoming big game, such as this one http://sports.espn.go.com/nfl/playoffs07/news/story?id=3208171



This one caught my eye due to the similarity in how we do our work.  They ran 10,000 simulations of the Patriots v. Giants to come up with a prediction for who would win.  Why run 10,000 -- why not just 1 simulation?  Well, there can be lots of fluky things that happen just by chance in football, so one simulation might not be very predictive.  In fact, there are so many possibilities that even 10 or even 100 might not capture the diversity (although I bet 1000 might be ok).

This is very similar to our work, as how a protein folds (or misfolds) can't be captured in a single simulation.  We often run 10,000 simulations to capture the diversity and complexity.  Also, there is luck involved here as well, as fluky things can happen in folding as well (something may fall into a trapped configuration or fold correctly early by chance).

It's neat how games (such as Madden 2008) are becoming more like full fledged simulations, with a lot of real-world detail, and real world simulations (such as the molecular dynamics we do in FAH) are running on game machines!
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Planned power outage Saturday

文章 NEWS BOT » 2008-01-25 06:05

NEWS DATE ::
 2008-01-24 15:43
NEWS LINK ::
 http://folding.typepad.com/news/2008/01 ... wer-o.html
NEWS TITLE ::
 Planned power outage Saturday
NEWS INFO ::
There will be a planned power outage in one of our server rooms on this Saturday, starting in the morning (8am PST) and lasting likely until 5pm PST.  This affects only one of our server rooms, so we will re-route around it for new assigns, and do not expect any problems.  It is a bit annoying as this is exactly the same room which had to go down a few weeks ago to fix this very item, which could not be fixed completely then, so hence another shutdown down.
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Code development updates

文章 NEWS BOT » 2008-01-26 04:03

NEWS DATE ::
 2008-01-25 18:39
NEWS LINK ::
 http://folding.typepad.com/news/2008/01 ... opmen.html
NEWS TITLE ::
 Code development updates
NEWS INFO ::
Here are some code development updates on some important client/cores

GPU core:  we've got the GPU core running in house and we found and fixed some bugs in our Q&A stage.  We're now continuing Q&A to see if we find any more bugs.  Right now, the GPU core is running on all new ATI cards, so we're excited to roll it out.  We are using CAL now (ATI's hardware abstraction layer) and that seems to make life a lot easier, and also should make running a GPU client a lot easier from the point of view of donors, as the driver issues and complexities should now be resolved.  We are still looking into an NVIDIA client.  The NVIDIA GPUs are very different to program, so a port isn't a simple thing to do.  We are  looking into this, though.

SMP core: right now, SMP on Linux and OSX is behaving fairly well, whereas Windows is giving some issues.  This is perhaps not a surprise, since the SMP code must use MPI, which has its origins on UNIX and is a newcomer to Windows.  We have been working with Windows MPI developers to improve the situation, but they tell us this isn't a simple fix.  Since we are in the business of studying proteins, not writing MPI libraries for Windows, we will wait until the MPI experts improve the Windows MPI before we make any claims of improvement there.

Finally, beta clients will be expiring soon, and we are in the process of Q&A for new clients.  We will also extend the expiration deadlines in the future clients to give some more time, and since the clients are appearing to be maturing.
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server room power outage over, back online

文章 NEWS BOT » 2008-01-27 10:03

NEWS DATE ::
 2008-01-27 01:29
NEWS LINK ::
 http://folding.typepad.com/news/2008/01 ... m-pow.html
NEWS TITLE ::
 server room power outage over, back online
NEWS INFO ::
That server room that went down is back up and Del and Dan got all of the servers back up (no small feat).  We have the servers running FAH, but often there is one or two that may have issues coming back up, and we're looking into that.  If you find any problems, please feel free to post a report in our forum (foldingforum.org).
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Update for assign2 assignment server

文章 NEWS BOT » 2008-01-28 23:03

NEWS DATE ::
 2008-01-28 13:39
NEWS LINK ::
 http://folding.typepad.com/news/2008/01 ... -assi.html
NEWS TITLE ::
 Update for assign2 assignment server
NEWS INFO ::
We're updating the hardware of our backup assignment server.  The switch over to the new hardware should occur today.  Note that this involves a DNS change and so we expect it may take some time for the DNS to propagate.  However, we will keep both servers up, so donors should not see any interruption in service.  However, if you do see something strange related to this backup AS, please report it in our forum (http://foldingforum.org).
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PS3 servers

文章 NEWS BOT » 2008-01-30 02:03

NEWS DATE ::
 2008-01-29 16:23
NEWS LINK ::
 http://folding.typepad.com/news/2008/01 ... rvers.html
NEWS TITLE ::
 PS3 servers
NEWS INFO ::
Our FAH servers for PS3's are getting hit pretty hard right now.  We are looking into whether this is a client problem (failure to backoff correctly during high loads) or a server issue.  We added a server last night to help and will add more this morning.  We are actively working on this one right now.
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PS3 update

文章 NEWS BOT » 2008-02-09 16:15

NEWS DATE ::
 2008-02-01 16:16
NEWS LINK ::
 http://folding.typepad.com/news/2008/02/ps3-update.html
NEWS TITLE ::
 PS3 update
NEWS INFO ::
We've been working constantly the last few days to improve the PS3 situation.  Based on our statistics, the situation has gotten better.  A few days ago (at its worst), it was very bad (~80% failure, which means 5-6 retries on average or more to get WU's back).  We're seeing more like 20-35% (1-3 retries) right now and the trend is getting better and better.  We have added some additional PS3 servers, and done some major code changes.  A new client should fix this issue introduced in 1.3 so this doesn't happen again.  For now, our server-side changes should take care of this in time, although it may take a few more days to settle down to say 1% failures (more typical).  We have also extended deadlines to compensate for this problem.
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PS3 issues, update #6

文章 NEWS BOT » 2008-02-09 16:15

NEWS DATE ::
 2008-02-03 15:09
NEWS LINK ::
 http://folding.typepad.com/news/2008/02 ... updat.html
NEWS TITLE ::
 PS3 issues, update #6
NEWS INFO ::
We have been working aggressively to find the root of this problem, investigating all possibilities (server, client, network, etc).  We have been debugging the entire FAH system on the PS3 over the last few days (as there could be several causes for what we're seeing), examining especially how the server is interacting with the clients, what the clients are doing, and how the Stanford network is handling the situation.  Several Stanford network engineers have looked into the problem to see if this is a network issue, but that does not appear to be the case.  The servers are running extremely well right now.  Our investigation so far has found that this issue is due to a problem
in the client, and we have identified a specific issue that's causing
this problem. 

With the completion of this investigation Saturday night, we have given the info of the results of our debugging and our plan on how to fix this to Sony last night, and we are hoping that they can come up with an updated client soon.  Unfortunately with the PS3, we cannot update the client ourselves, otherwise we would release a client update ourselves, as we have done in the past as needed.  Therefore, over the last few days, we have worked on server side tweaks (the only part we can work on) while Sony can work on the client.  Before the client gets updated, we expect that the situation will continue to improve gradually but with the issues we have been seeing.

It looks like there are some misconceptions about the situation, based on the comments posted here.  This is not an issue of the FAH servers not being powerful enough -- any server network would be showing this same issue with the client issue that's going on (in fact, the FAH servers serving the PS3 are more powerful than in other parts of FAH, which is operating just fine with far more clients); indeed, the PS3 backend has been spec'd out to handle 1M PS3 clients and we are way under that.  Also, this is also not an issue that the PS3's are too fast.  The server load depends on the number of clients and the amount of bytes they send back; in FAH, the PS3's compute faster, and that is used to do more complex calculations, not to send more bytes, and thus does not create a greater server load.

The client update would fix how the client interacts with the servers
to stop the problem we're seeing right now, including the issues with
assigns (getting new WU's), accepts (returning WU's), and points.  Sony is a large company and the development team likely cannot publicly give out ETA's on when this will be fixed, etc, but it's important to stress that they are working on this and know this is a very, very critically important update to make, and they are working aggressively to fix it.
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