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Panic Mode On (100) Server Problems?
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Author | Message |
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kittyman Send message Joined: 9 Jul 00 Posts: 51468 Credit: 1,018,363,574 RAC: 1,004 |
Well, something is wrong. Even though the creation rate shows high output, I see that there are no tasks available. I have been getting the "Project has no tasks available" message now for the last half hour on both systems. Yeah, well............. Results returned is also at 104k, indicating a shorty storm. So, unless the splitters can stay at the high water mark for some time, there is going to be a shortage of work going out for a bit. "Freedom is just Chaos, with better lighting." Alan Dean Foster |
betreger Send message Joined: 29 Jun 99 Posts: 11361 Credit: 29,581,041 RAC: 66 |
RTS for both MB + AP = 0. This is cause for PANIC |
Matt Lebofsky Send message Joined: 1 Mar 99 Posts: 1444 Credit: 957,058 RAC: 0 |
Re: RTS=0 - Lots of stuff hitting the science database, thus causing general indigestion. One of these is the weekly backup, which should end any minute now. Hopefully that will be enough to push things through without much additional intervention. - Matt -- BOINC/SETI@home network/web/science/development person -- "Any idiot can have a good idea. What is hard is to do it." - Jeanne-Claude |
Zalster Send message Joined: 27 May 99 Posts: 5517 Credit: 528,817,460 RAC: 242 |
Thanks for the info Matt!! |
kittyman Send message Joined: 9 Jul 00 Posts: 51468 Credit: 1,018,363,574 RAC: 1,004 |
Thanks, Matt. We knew you were keeping on top of it....LOL. "Freedom is just Chaos, with better lighting." Alan Dean Foster |
djmotiska Send message Joined: 26 Jul 01 Posts: 20 Credit: 29,378,647 RAC: 105 |
I wish Matt & co could enable lost tasks resend. Got 65 ghosts on monday, oops. Current tasks will last probably until tomorrow. |
kittyman Send message Joined: 9 Jul 00 Posts: 51468 Credit: 1,018,363,574 RAC: 1,004 |
I wish Matt & co could enable lost tasks resend. Got 65 ghosts on monday, oops. Current tasks will last probably until tomorrow. I know, but it apparently takes a toll on the database server. And it has been coping amazingly well with the WOW onslaught. Maybe after the event is done? "Freedom is just Chaos, with better lighting." Alan Dean Foster |
djmotiska Send message Joined: 26 Jul 01 Posts: 20 Credit: 29,378,647 RAC: 105 |
I wish Matt & co could enable lost tasks resend. Got 65 ghosts on monday, oops. Current tasks will last probably until tomorrow. I know that. Don't remember if current level of ~1500 is normal level of queries/sec, tho I remember seeing higher figures. And it has been coping amazingly well with the WOW onslaught. Let's hope the best and fear the worst. Luckily all those ghost wu's were vlar's so they are not timing out anywhere soon. I got those ghosts when I changed CPU app from sse2 to sse3, forgot to change reference of cmdline.txt in app_info.xml. At about same time I updated the OpenCL app, new r2929 is 15-20 % faster than old r2033. I also noticed I don't have to have a free core to feed the GPU. Goob job, Raistmer! |
kittyman Send message Joined: 9 Jul 00 Posts: 51468 Credit: 1,018,363,574 RAC: 1,004 |
I wish Matt & co could enable lost tasks resend. Got 65 ghosts on monday, oops. Current tasks will last probably until tomorrow. If they timeout, they shall simply be resent. Hopefully the next cruncher in line has better luck with them. "Freedom is just Chaos, with better lighting." Alan Dean Foster |
betreger Send message Joined: 29 Jun 99 Posts: 11361 Credit: 29,581,041 RAC: 66 |
Yes it seems to do that all too often. |
Speedy Send message Joined: 26 Jun 04 Posts: 1643 Credit: 12,921,799 RAC: 89 |
And again, the replica DB went poof. This may be too reduce strain on the database so it can dedicate more resources to the splitters |
Grant (SSSF) Send message Joined: 19 Aug 99 Posts: 13736 Credit: 208,696,464 RAC: 304 |
I see the splitters are still not up to the task. Grant Darwin NT |
kittyman Send message Joined: 9 Jul 00 Posts: 51468 Credit: 1,018,363,574 RAC: 1,004 |
Kitties are still OK, caches are keeping up. No worries here. "Freedom is just Chaos, with better lighting." Alan Dean Foster |
Grant (SSSF) Send message Joined: 19 Aug 99 Posts: 13736 Credit: 208,696,464 RAC: 304 |
Kitties are still OK, caches are keeping up. As are my caches. However the fact that the splitters aren't keeping up indicates an issue that should be resolved. As systems become more powerful, as they have since the beginning of Seti@home, more & work will be done. It would be a shame if in the future people are unable to get work, even though there is plenty available; it's just that it can't be produced fast enough. Why wait till that occurs? Why not sort it out now? Makes more sense to me to avoid issues, not wait for them to occur & then try to resolve them. Grant Darwin NT |
WezH Send message Joined: 19 Aug 99 Posts: 576 Credit: 67,033,957 RAC: 95 |
I agree with Grant, splitters are just too slow at moment. Results received in last hour is above 100.000 all time, so Current result creation rate should be at least 28/sec to keep it even. I just hope that they have time and manpower to sort it out... |
Richard Haselgrove Send message Joined: 4 Jul 99 Posts: 14650 Credit: 200,643,578 RAC: 874 |
I agree with Grant, splitters are just too slow at moment. Results received in last hour is above 100.000 all time, so Current result creation rate should be at least 28/sec to keep it even. If you read Matt's technical posts, all three of time, manpower, and Arecibo recording time are in short supply. What time and manpower are available are being concentrated on working up the alternative tools, so we can search the data from other telescopes and hence other parts of the sky. Keeping every volunteer supplied with every WU they ask for isn't the highest of their priorities, and to be honest I don't think it should be. |
Grant (SSSF) Send message Joined: 19 Aug 99 Posts: 13736 Credit: 208,696,464 RAC: 304 |
Keeping every volunteer supplied with every WU they ask for isn't the highest of their priorities, and to be honest I don't think it should be. Every cruncher supplied with every WU they ask for shouldn't be a major priority (let alone one of the highest), I agree. But the goal of the project is to process data, and if it's not being split, then it can't be processed. And as we've seen with the move away from MB to AP on the part on many of the more vocal crunchers, Credit is an important factor in people choosing to crunch for Seti; and a lack of work has a big effect on the amount of credit people get. So while we are aware there won't always be data available to crunch, and the project won't be up 24/7/365, it would be nice if while it was up, and there is data to crunch, it's possible to do so. Hence among the hundreds of other things that need doing, some attention to the ongoing splitting issues would be appreciated. Grant Darwin NT |
Mike Send message Joined: 17 Feb 01 Posts: 34258 Credit: 79,922,639 RAC: 80 |
We simply don`t get enough tapes from Arecibo but there is work from Green Banks. With each crime and every kindness we birth our future. |
Grant (SSSF) Send message Joined: 19 Aug 99 Posts: 13736 Credit: 208,696,464 RAC: 304 |
We simply don`t get enough tapes from Arecibo but there is work from Green Banks. Having raw data is a whole other issue IMHO. If we don't have any, we don't have any. Simple. But if we do have it, it's not much good if we can't process it, and it has to be split in order to process it. Splitter output has been an issue ever since the PFB splitters came on line, and as processing power increases it has become, and will become, even more of an issue. Sure, it doesn't matter how good Seti's hardware & software is if there is data to process. But if we have the data, it would be nice to be able to process it. Grant Darwin NT |
rob smith Send message Joined: 7 Mar 03 Posts: 22200 Credit: 416,307,556 RAC: 380 |
For those who don't bother to read Matt's post in Tech News on 21 August: Message 1716662 - Posted: 21 Aug 2015, 22:47:12 UTC So, the tapes being split just now have already been split once, but are being culled for more usable data. More effort is being put into the splitter for the GBT data (coo, what a surprise - its "tapes" are not the same format as those from AO...) Having two data sources should really improve the situation somewhat. Bob Smith Member of Seti PIPPS (Pluto is a Planet Protest Society) Somewhere in the (un)known Universe? |
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