Posts by Ryan Rodney


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1) Message boards : Number crunching : Building a BOINC farm for a beginner. (Message 1306962)
Posted 651 days ago by Profile Ryan Rodney
"If that doesn't work I could buy a cheap used computer like this one:"

Don't buy that as a cruncher.
The small form factor and puny power supply means you can't fit a high end Graphics card in there, and that's what gives you a serious cruncher. Using only an old CPU like that just gives you a small space heater. Useful if the weather gets cold, but that's about it.

Now buying a $100 refurb PC like that, but with a mini-tower case and a beefier 450w power supply, and then spending another $100 on a CUDA capable graphic card would get you something useful. Also makes a passable game machine for lan parties etc.

To make a "farm", just keep stacking them up. You can run them without screens and keyboards etc, just a lan connection and use remote desktop to sign in to the individual machines.

Once you get familiar with the innards of PCs you will know what you can mix and match to rebuild old machines. Often 3 dead PC's can be mixed n matched to get 2 working ones. You get a feel for the ones that are easy to rebuild.
No power at all? - Probably PSU, easy fix
Boots but comes up with a disk error? - Probably dead hard disk - relatively easy fix
Powers up but no picture - Who knows? But chances are you can recover a good PSU and HDD to fix the other 2....

Doesn't take long to build up a "farm", and if they can take CUDA cards, you can build something useful, without spending 1,000s of $$ on hardware.

Ian

yeah, I was more thinking about getting something like that for learning about computers, but I'm going to see if I can get some old junkers for free (or at least really cheap) before I go throwing money at anything.
2) Message boards : Number crunching : Building a BOINC farm for a beginner. (Message 1306002)
Posted 654 days ago by Profile Ryan Rodney

Basically what I'm getting from this thread is that this idea I've been having is way beyond my skill level.


Maybe you should start reading here.

http://techreport.com/review/13671/how-to-build-a-pc

Oh this is good stuff! It's not exactly what I was looking for but I think this could help me a lot.
3) Message boards : Number crunching : Building a BOINC farm for a beginner. (Message 1306001)
Posted 654 days ago by Profile Ryan Rodney


Basically what I'm getting from this thread is that this idea I've been having is way beyond my skill level.



You've got to start somewhere and if you've got an interest, but made it to university age without sticking your head into a computer to see how it ticks, there's no time like the present.

These things are stuck together on assembly lines. It isn't hard to stick all the parts in a box and make it work. Making the parts is beyond any of us. So you have to acquire the parts and assemble it like a kit.

Do you have any easily available source for an old computer? (old, but probably not older than a Pentium 4). How much room do you have for all of this? A desktop? A bookshelf?

Well, I've taken my computer apart a couple of times but never done anything more technical than clean and replace the fan and look around to see what was inside. I don't really know what I'm looking at when I open it though. I can identify a few things, such as the hard drive, CPU, RAM, etc, but I'm still mystified by most of it.

I know that my parents have (or used to have; they may have gotten rid of them) a couple old Dell laptops (from 03 or 04 I think) that they don't use anymore, and might give me if I ask. They also have an old desktop but I have no idea how old it is or anything else about it. If that doesn't work I could buy a cheap used computer like this one: http://www.amazon.com/Dell-GX620-Interlaced-Intregrated-Professional/dp/B003KJ04TA/ref=sr_1_1?ie=UTF8&qid=1352869855&sr=8-1&keywords=computer+under+100 and I'm sure I could find other similar deals on Amazon or Ebay.
4) Message boards : Number crunching : Building a BOINC farm for a beginner. (Message 1305979)
Posted 654 days ago by Profile Ryan Rodney

Tell us what you were thinking more specifically and let's see if we can help you make the most of your time/money/energy.




I think that my biggest issue here is I don't really know what I'm doing. I guess I had this idea that it was possible to get a motherboard and take processors from old computers and just plug them into it and somehow attach them all together to make one mega-processor, but from what I'm reading that doesn't seem to be the case. (So in a way you were right about the duct tape thing, I'm just not quite that dumb!)

Basically what I'm getting from this thread is that this idea I've been having is way beyond my skill level.
5) Message boards : Number crunching : Building a BOINC farm for a beginner. (Message 1305864)
Posted 654 days ago by Profile Ryan Rodney
BOINC farm = Big Electricity Bill :(

BUT at the moment I live in a dorm, so I don't directly pay an electricity bill. So that's not a problem for me atm. And I'm not talking about putting a ton of processors in there...maybe like 2 or three, mostly to learn how to do it and for fun.
6) Message boards : Number crunching : Building a BOINC farm for a beginner. (Message 1305732)
Posted 655 days ago by Profile Ryan Rodney
I am interested in trying to build a BOINC farm, as in cannibalizing processors from old computers and putting them to work on crunching numbers for various projects. However I've never done anything like this before, so I really have no idea where to start. Does anyone know where I could find a guide or directions for how to do this? Would this even be possible for someone at my level of computer knowledge (very low) or would I need to get to know computers and their components a lot better before I could even attempt something like this?

Thanks for any answers!
7) Message boards : Science (non-SETI) : Rogue Planets (Message 1169319)
Posted 1025 days ago by Profile Ryan Rodney
There probably are lots of them flying around out there. But I doubt we'll ever find one. It would be a bit like looking for a piece of pollen in the ocean using a cotton ball.

And while it's true that life is extremely unlikely, we can't totally rule it out. If Jupiter got flung out into space Io would still be hot, since its heat comes from tidal effects. It's possible that somewhere in this giant universe of ours something like that has happened.
8) Message boards : Number crunching : Haven't gotten credit in 8 days. (Message 1163816)
Posted 1045 days ago by Profile Ryan Rodney
Hello,

Just a quick question. I've been crunching SETI for a few months now on my laptop, but recently it's stopped giving me credit. I've been running and returning data packets, but haven't gotten anything back. I also crunch for Milky Way and Rosetta, and they have been working just fine. Anyone know what could be up?
9) Message boards : SETI@home Science : If the Giza pyramids were built by Alien. (Message 1163117)
Posted 1048 days ago by Profile Ryan Rodney
Let's not forget how good the human brain is at seeing familiar patterns where there really isn't one. I.e., the many logs that have been mistaken for the loch ness monster, the Mars alien http://www.techchee.com/wp-content/uploads/2008/01/life-on-mars-nasa-captured-a-female-alien-220108.jpg, the man in the moon, Jesus and Mary on pieces of toast....
10) Message boards : SETI@home Science : What are some other scientific goals of SETI and SETI@home, other than finding ET? (Message 1141657)
Posted 1109 days ago by Profile Ryan Rodney
I read that the SETI Institute might map out space debris for the US Air Force in exchange for funding, and that got me wondering. What are some of the other things that SETI and SETI@home do in addition to looking for ET?
11) Message boards : SETI@home Science : 可以发现异常数据不? (Message 1135064)
Posted 1124 days ago by Profile Ryan Rodney
Wo觉得他们告诉你。对不起,wo的中文很不好。wo学了两年可是中文很难。

和wo的电脑不写"wo"。。。为什么?wo不知道。
12) Message boards : SETI@home Science : Is there a boundary on how large/small wavelengths can be? (Message 1135062)
Posted 1124 days ago by Profile Ryan Rodney
We have DC which is in effect a wave of infinite size, so we know there is no limit going this direction, except perhaps the age of the Universe if it is to be generated inside the Universe.

On the other end the plank length might be considered a limit. Such a wave would pack a lot of energy. At some point going smaller the wave/photon would consist of the entire energy of the universe and I assume that might be a real physical limit.


Sorry, but what is DC? And with the Planck length, isn't it simply that it is impossible to probe anything smaller, or is it that things actually
can't get any smaller? The limits on the energy you can put into it makes sense though.
13) Message boards : SETI@home Science : Is there a boundary on how large/small wavelengths can be? (Message 1134998)
Posted 1124 days ago by Profile Ryan Rodney
I understand that this isn't exactly Seti@home science, but I think that the people on this forum are qualified to answer better than most other places.

My question is, is there such thing as a largest or smallest wavelength? Or do radio waves extend out to the size of the universe, and gamma rays shrink to undetectable sizes?
14) Message boards : SETI@home Science : What happens to all the data that doesn't turn up anything? (Message 1105355)
Posted 1206 days ago by Profile Ryan Rodney
When we analyze data and it comes up negative, what happens then? Is it of any more scientific value? Does it get stored somewhere, or deleted? Does it get analyzed further, or what?


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