Energy loss

Message boards : Number crunching : Energy loss

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GPUGRID Send message Joined: 12 Dec 11 Posts: 91 Credit: 2,730,095,033 RAC: 0 Level Scientific publications	Message 30863 - Posted: 16 Jun 2013 \| 17:11:28 UTC
	Well, I don´t have many where I live, but when it happens, it ruins all the units beeing processed. That would be 10 long run units, such a waste. There is any way to prevent this? The units just fail, driver reset, machine hangs up and so on. Very frustrating.
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flashawk Send message Joined: 18 Jun 12 Posts: 297 Credit: 3,572,627,986 RAC: 0 Level Scientific publications	Message 30864 - Posted: 16 Jun 2013 \| 17:58:14 UTC - in response to Message 30863.
	Are you saying you're power went out or you're computer crashed? When I first built the 4 computers I have now, there were all kinds of problems. I used the best components I could buy but it took a lot of fine tuning to get them stable and cool enough to run 24/7 365. Have you looked at the logs in "Event Viewer", the most helpful are the Windows logs and the Application logs, check their dependencies too. One big issue I had that was hardware related was the voltage being supplied to my RAM, it was set to Auto in the BIOS (Asus M5A99FX PRO R2.0), the RAM required 1.5 volts and the motherboard was supplying 1.45 volts, I manually upped it to 1.575 volts (4 sticks, 32GB) and my stability increased 10 fold. You can safely take most memory to 1.65 volts with passive cooling as I have done it many times. With the types of loads were putting on our computers, memtest won't catch these kinds of problems, I don't think there are many stress tests that even compare. I run 2 GPU-GRID models and 6 CPDN models 24/7 365 per computer on all 4 machines and seem to have been very lucky with crashes and spontaneous reboots, it took a few months but the logs in Event Viewer helped.
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GPUGRID Send message Joined: 12 Dec 11 Posts: 91 Credit: 2,730,095,033 RAC: 0 Level Scientific publications	Message 30866 - Posted: 16 Jun 2013 \| 18:31:51 UTC
	No I mean, power cuts. Energy goes down on all the house, the block, etc.... when it comes back, all crashes on both machines. It cant recover from a previous saved point, it seems.
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TJ Send message Joined: 26 Jun 09 Posts: 815 Credit: 1,470,385,294 RAC: 0 Level Scientific publications	Message 30867 - Posted: 16 Jun 2013 \| 18:37:23 UTC - in response to Message 30863. Last modified: 16 Jun 2013 \| 18:39:13 UTC
	Well, I don´t have many where I live, but when it happens, it ruins all the units beeing processed. That would be 10 long run units, such a waste. There is any way to prevent this? The units just fail, driver reset, machine hangs up and so on. Very frustrating. I had power outages a few years ago, but things that run on the CPU and (I let write down to disk every 5 minutes), could be restarted and resumed where they where. I didn't now what happened with GPU jobs as I didn't had them them. What you can do is to use a UPS for the crunching rigs and in case of a power outage and you are at home you can safely power-down the rigs. I almost bought two UPS myself but there haven't been outages for the last 5 years. If it doesn't happen often than I should leave it as it is and take this as a loss. However it is pitiful. ____________ Greetings from TJ
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flashawk Send message Joined: 18 Jun 12 Posts: 297 Credit: 3,572,627,986 RAC: 0 Level Scientific publications	Message 30868 - Posted: 16 Jun 2013 \| 18:55:38 UTC
	http://www.newegg.com/Product/Product.aspx?Item=N82E16842102134 I'm sure you're computers would require a more powerful UPS, this will give you an idea. They come with their own software or you can configure what's built in to Windows or Linux, set BOINC to not run on batteries. I have 4 of these http://www.newegg.com/Product/Product.aspx?Item=N82E16842102048 If you do decide to get some sort of UPS, make sure it's compatible with you're PSU, all newer PSU's are active PFC (APFC).
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GPUGRID Send message Joined: 12 Dec 11 Posts: 91 Credit: 2,730,095,033 RAC: 0 Level Scientific publications	Message 30869 - Posted: 16 Jun 2013 \| 20:19:03 UTC
	Thanks for the tips guys :)
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ExtraTerrestrial Apes Volunteer moderator Volunteer tester Send message Joined: 17 Aug 08 Posts: 2705 Credit: 1,311,122,549 RAC: 0 Level Scientific publications	Message 30919 - Posted: 22 Jun 2013 \| 12:32:17 UTC
	As far as I understand a UPS runs down the battery even when there is no power loss, i.e. it decouples both grids completely. That means the rather expensive batteries will have to be replaced within a few years. This alone might make it more expensive than simply loosing a few WUs every now and then. However, I don't know if there are "light UPSs" which would bypass the battery as long as power's still there. MrS ____________ Scanning for our furry friends since Jan 2002
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dskagcommunity Send message Joined: 28 Apr 11 Posts: 456 Credit: 817,865,789 RAC: 0 Level Scientific publications	Message 30925 - Posted: 22 Jun 2013 \| 16:29:07 UTC Last modified: 22 Jun 2013 \| 16:34:45 UTC
	There is always a very little loading on the battery because the type of the batteries needs that. Depending on the sort of battery the lifecyle of them varies between 1 and 5 years. Sadly i had one with 1-1,5 :( the UPS maked more troubles then running the server on normal powerline -_- But the newer APC are rather good. The batteries have a good lifetime. Normal the UPS Builder say you have to change the batteries every 3 years, neither they are shown as still good. It can happend it shown as good but fail after very short time when the power is down (single cell defect). Costs of batteries are varies too very wide, so you have to look before buy the UPS ;) Its been a long time ago but i think mine cost about 180Euros or more but that was a fortress UPS not an APC. We have some APC in my work, but i dont buy the batteries for them so i cant say what we pay for the 750, 2200, 10000 Models. ____________ DSKAG Austria Research Team: http://www.research.dskag.at
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nanoprobe Send message Joined: 26 Feb 12 Posts: 184 Credit: 222,376,233 RAC: 0 Level Scientific publications	Message 30930 - Posted: 23 Jun 2013 \| 4:48:31 UTC - in response to Message 30868.
	http://www.newegg.com/Product/Product.aspx?Item=N82E16842102134 I'm sure you're computers would require a more powerful UPS, this will give you an idea. They come with their own software or you can configure what's built in to Windows or Linux, set BOINC to not run on batteries. I have 4 of these http://www.newegg.com/Product/Product.aspx?Item=N82E16842102048 If you do decide to get some sort of UPS, make sure it's compatible with you're PSU, all newer PSU's are active PFC (APFC). I have 3 of their 800 watt models. Love 'em. With all the momentary power interruptions and lightening strikes we have here having a reliable UPS is a must.
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terencewee* Send message Joined: 29 May 12 Posts: 8 Credit: 21,605,500 RAC: 0 Level Scientific publications	Message 30933 - Posted: 23 Jun 2013 \| 7:51:46 UTC
	UPS-Wikipedia I'm using line-interactive UPSes, even for my Internet connectivity. Quite cheap and can last ~3+years before needing a change (best just to recycle). Place UPS @ well ventilated location. Do try to get those that offer USB connectivity - so that you can set your computer: To automatically shutdown during power-outages or Config BOINC to suspend work when using battery or Run a script/batch for everything else ____________ terencewee* Sicituradastra.
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Message boards : Number crunching : Energy loss

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