Posts by Joshua Nicoll

1) Message boards : News : Free Speech and SETI@home (Message 1863925)
Posted 27 Apr 2017 by Profile Joshua Nicoll
Post:
I'm seriously disappointed to see people taking it out on what is a very loosely related project, I'd say Berkeley is just the HQ for SETI@home, it's more of a NASA/ESA thing since that is what SETI is. Politics doesn't belong in science. Even my personal views of these lunatics doesn't matter (although I try to be centre, I'm starting to move a little more right to remain impartial) It is completely unacceptable to personally attack someone for something they aren't even involved in.
2) Questions and Answers : GPU applications : AMD FirePro V7900, GPU "missing" (Message 1862413)
Posted 19 Apr 2017 by Profile Joshua Nicoll
Post:
Hello,
I tried a couple of things, namely reinstalling drivers (I have yet to use DDU, however, I am about to do that after posting this while waiting for replies to this) resetting the BIOS and making the card the primary (and now only) display adaptor, but it doesn't seem to work. I also noticed I couldn't open the FirePro Control Centre, so it might be a driver issue but I'm not too sure. I googled through other missing GPU posts, but couldn't find a solution from them (if DDU doesn't work I guess I'll have to uninstall and reinstall BOINC) I set this PC up just yesterday so I doubt it could have broken so fast but windows was being a little buggy with me until today.

There is a screenshot of some info relating to, again I'm not 100% what happened as I'm much more into hardware than software. I checked the PC in my list and it was still listed as having it as a co-processor, I also left the link to the details page for the server
https://drive.google.com/open?id=0B5g2zvlBjjyYbUdoZ1NLVFBXblk
https://setiathome.berkeley.edu/show_host_detail.php?hostid=8248334
3) Message boards : News : Unexpected outage (March 30-31) (Message 1858471)
Posted 31 Mar 2017 by Profile Joshua Nicoll
Post:
Oh man, that really sucks, was there a lot of data lost or are you still assessing the damage? I hate getting corrupted archives, it annoys me.
4) Message boards : News : Problems with centurion (Message 1840448)
Posted 6 Jan 2017 by Profile Joshua Nicoll
Post:
We're having some problems with centurion, the computer holds the Breakthrough Listen data and does our Breakthrough Listen splitting. Correction will probably require an OS upgrade.

Because of this GBT data will be scarce over the weekend.

Get well soon Centurion

I'm glad I set all my BOINC managers to keep at least 2 days work and 1 day extra work, I won't need a refresh until after Monday early morning.
5) Message boards : News : Problems with centurion (Message 1840446)
Posted 6 Jan 2017 by Profile Joshua Nicoll
Post:
We're having some problems with centurion, the computer holds the Breakthrough Listen data and does our Breakthrough Listen splitting. Correction will probably require an OS upgrade.

Because of this GBT data will be scarce over the weekend.

Get well soon Centurion
6) Questions and Answers : Unix/Linux : boinccmd --project https://setiathome.berkeley.edu nomorework command returns error 02-Aug-2016 01:48:47: GUI RPC error: No such project Operation failed: Error -1 (Message 1806613)
Posted 2 Aug 2016 by Profile Joshua Nicoll
Post:
It might be because it's an SSH server, I'll check on the server shell from the server itself.
7) Questions and Answers : Unix/Linux : boinccmd --project https://setiathome.berkeley.edu nomorework command returns error 02-Aug-2016 01:48:47: GUI RPC error: No such project Operation failed: Error -1 (Message 1806593)
Posted 2 Aug 2016 by Profile Joshua Nicoll
Post:
Hey Joshua,
I tried this and it worked for me:
boinccmd --project setiathome.berkeley.edu nomorework
Cheers,
Rob :-)

Nope, comes up with the same error, that is a pain, I guess I'll just reinstall the OS after backups and deal with the error assignments
8) Questions and Answers : Unix/Linux : boinccmd --project https://setiathome.berkeley.edu nomorework command returns error 02-Aug-2016 01:48:47: GUI RPC error: No such project Operation failed: Error -1 (Message 1806514)
Posted 2 Aug 2016 by Profile Joshua Nicoll
Post:
I want to set my boinc client to not get assigned any new tasks as I'm going to be reinstalling the OS soon and don't want to get a large number of Error: Abandoned. I want to let the machine process its current lot then I can reinstall in piece of mind that it hasn't got a load of abandoned work units. but when I used the command boinccmd --project http://setiathome.berkeley.edu nomorework it returns the error

joshadmin@Huawei-HG658c-instalacion-Server-102-B:~$ boinccmd --project http://setiathome.berkeley.edu/ nomorework
02-Aug-2016 01:48:47: GUI RPC error: No such project
Operation failed: Error -1

Anyone have any idea why?
9) Questions and Answers : Unix/Linux : Does ECC and Xeon's make a noticble difference (Message 1799979)
Posted 1 Jul 2016 by Profile Joshua Nicoll
Post:
You seem to think I don't know what I'm talking about, but anyone with a masters degree in wikiology could tell me what you told me. ECC's job is to prevent data corruptions from causing a system failure, which is the most common failure, after that we are just arguing semantics and I usually don't care for other people, since I've learned to never listen to them. They wouldn't exist if they were not needed. By that messure lets replace all the Xeons in the world with i7's and regular RAM and see how quickly your statement holds up pal.
10) Questions and Answers : Unix/Linux : Does ECC and Xeon's make a noticble difference (Message 1799708)
Posted 30 Jun 2016 by Profile Joshua Nicoll
Post:
Yeah, I'm acutely aware of slightly higher latency with the ECC RAM, but Xeons are a kinda different than their I7 brothers, apart from the better binning and higher operating temperatures for longer, they have a wider instruction bit extension range.


Unfortunately that isn't correct at all. Xeons and i7s have the same instruction bit extensions (SSE - SSE 4.2, AES, AVX, etc); come from the same die (so same bin), and have the same temperature ranges.

If you think otherwise, give me any Xeon model number and I can show you the i7 counterpart with the same features, minus the multi-socket capabilities or core count.


Well take my dual Xeons, X5670, and compare it against the same period best i7, the 980x, while both are similar, and even have the same cache (more modern Xeons have SIGNIFICANT more cache now) the i7 doesn't support trusted computing, as well as a higher operating temperature (target of 80ºC under 100% load, and a critical T Junction maximum of 96ºC, the i7 has a temperature target of around 60ºC (not to mention the much smaller RAM support) and probably couldn't survive an entire week of being at that, with 100% load like mine Xeons can, at that point the ECC and trusted computing does help a little to prevent errors, as I've noticed crashed from errors and instability relating to temperatures are a lot more of an issue on non ECC systems, and mostly windows. On my Linux i7 3770k, I still don't see issues but I wouldn't be happy with that being on at 80ºC for a week. I have had crashes though, and while they were not temp related, it must have been compute errors, my server has never crashed, which is what the ECC RAM's main role it. Older Xeons had more instruction sets, but the commercial processors and extreme range has caught up pretty well, but yes, Xeons last longer at heavier work loads at higher temperatures without crashes and errors, otherwise companies wouldn't but them.
11) Questions and Answers : Unix/Linux : Does ECC and Xeon's make a noticble difference (Message 1799616)
Posted 30 Jun 2016 by Profile Joshua Nicoll
Post:
Xeons are cut from the same die as high-end Core i7's and often share many of the same features. In that regard, there's nothing special about Xeons that make them perform better than a high-end Core i7 of the same class.

ECC memory, or Error Correcting Code, is actually slower than regular (unbuffered, non-ECC) memory because each bit has to be checked before it can be accessed or used.

Now, does this error-correcting memory actually help? Basically no. The memory in use changes frequently enough that the chances of a bit-flip causing an error in the results is fairly slim. You have a greater chance of overheating components causing errors in results than an error reading from or writing to RAM.

In the long run, all we're doing as volunteers is offering our devices to find signals and store them in a database for later verification and re-checking. Distributed Computing started with the understanding that work is being sent to potentially unreliable devices, therefore allowances are made to recover from errors, such as sending out a single workunit to multiple machines, then having the results from both machines checked and verified against each other for greater accuracy. Any super-sensitive scientific work that needs to be done on a machine meeting specific requirements would be done in-house on a server or cluster.

Yeah, I'm acutely aware of slightly higher latency with the ECC RAM, but Xeons are a kinda different than their I7 brothers, apart from the better binning and higher operating temperatures for longer, they have a wider instruction bit extension range. I'm at only a few metres above sea level so error's are not an issue, but if I wanted to fill my server with max RAM, RDIMM's would have to be used, given 288GB can't be used by the system if they're unbuffed. But all that aside, even considering that ECC and Xeons are very good at this kinda thing, what DEFINITELY makes a difference is the Dual CPU config, I just wish I could fit some Quadro GPU's into it, as it would only fit one currently, might just stick a GTX 750ti in it. I might get another server, maybe a U2 or U3 server for more co-processors.
12) Questions and Answers : Unix/Linux : Does ECC and Xeon's make a noticble difference (Message 1799466)
Posted 29 Jun 2016 by Profile Joshua Nicoll
Post:
I have a dual xeon server, with ECC RAM. But does that help a little or a lot? Well the only errors I've ever had that I noticed are from deleting PC's that I no longer have from my list, but that means my desktop and laptop also don't get errors. So does ECC RAM help? Well yes, I'm pretty sure, it certainly means it won't have to waste time finding and correcting errors, but does that help?
13) Questions and Answers : Unix/Linux : Is my device suitable. (Message 1781844)
Posted 24 Apr 2016 by Profile Joshua Nicoll
Post:
Hello,
I have a HP Proliant DL160 G6 running dual Intel Xeon L5630 with 8GB of DDR3 per CPU with plenty of bandwidth and HDD space. It's running Ubuntu Server 15.10 and is usually used via SSH, is it suitable for use in the SETI@home program?





 
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