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Universe@Home in BOINC Pentathlon

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Profile Krzysztof Piszczek - wspieram Polski projekt BOINC
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Message 1198 - Posted: 10 Jun 2016, 12:01:09 UTC

As most of you probably knows, we are a part of BOINC Pentathlon competition.

Our server will be tested by you from 2016-06-12 00:00:00 UTC until 2016-06-19 00:00:00 UTC .
Krzysztof 'krzyszp' Piszczek

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Message 1200 - Posted: 10 Jun 2016, 12:18:22 UTC

In the morning the storm begins.
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Profile Krzysztof Piszczek - wspieram Polski projekt BOINC
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Message 1201 - Posted: 10 Jun 2016, 15:20:13 UTC - in response to Message 1200.  

In the morning the storm begins.

Another stress test for server ;)

It will be possible that on first two, three hours server will be blocked by uploaders (or more likely - by validator and assimilator) but I'm quite sure that it will go better after first wave.
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Message 1202 - Posted: 10 Jun 2016, 19:37:38 UTC - in response to Message 1200.  

In the morning the storm begins.
Pardon, in one day morning.
We will see, universe was almost very stable.
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Profile [AF>Libristes]Maeda
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Message 1203 - Posted: 11 Jun 2016, 8:37:43 UTC

Server down :(
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Profile Krzysztof Piszczek - wspieram Polski projekt BOINC
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Message 1204 - Posted: 11 Jun 2016, 8:47:05 UTC - in response to Message 1203.  

Server down :(

No. Work generator is in progress.
Krzysztof 'krzyszp' Piszczek

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Message 1205 - Posted: 11 Jun 2016, 8:53:35 UTC

OK great :)
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Message 1206 - Posted: 11 Jun 2016, 8:57:29 UTC - in response to Message 1198.  

Very happy that administrators are preparing work for us, pentathletes.

Dziękuję!
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Message 1208 - Posted: 11 Jun 2016, 9:09:24 UTC

I will also run work generator again afternoon/evening to make more WU's, so don't worry about daemons stop today - it is planned and controlled ;)
Krzysztof 'krzyszp' Piszczek

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Message 1212 - Posted: 11 Jun 2016, 20:23:00 UTC

;-)
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Message 1213 - Posted: 12 Jun 2016, 0:56:31 UTC

Ok... Server is under some pressure right now but at the moment everything looks ok :)

If you wish, I can show some statistics for server and (especially) disks load ;)
Krzysztof 'krzyszp' Piszczek

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Message 1214 - Posted: 12 Jun 2016, 1:01:19 UTC - in response to Message 1213.  

Can you PLEASE FIX the link to the Server status page to the correct url:
http://universeathome.pl/universe/server_status.php
The links on the web site DO NOT WORK.

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Message 1215 - Posted: 12 Jun 2016, 2:32:41 UTC

Hi Krzysztof,

could you please take a look at this host and explain why all work units got abandoned?

http://universeathome.pl/universe/show_host_detail.php?hostid=24161

There were uploaded as part of the Pentathlon and as far as I can see, perfectly within the deadline and also did not show any errors while crunching. Only uploading took a little bit long (for obvious reasons....;))

Thanks in advance!
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Profile Krzysztof Piszczek - wspieram Polski projekt BOINC
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Message 1216 - Posted: 12 Jun 2016, 9:45:32 UTC - in response to Message 1215.  

Do you use more then one BOINC Manager on this machine?
Krzysztof 'krzyszp' Piszczek

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Message 1217 - Posted: 12 Jun 2016, 10:33:51 UTC

Seems like the validator is under some pressure?! Have many pending credits.
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Message 1218 - Posted: 12 Jun 2016, 10:37:21 UTC - in response to Message 1217.  

Seems like the validator is under some pressure?! Have many pending credits.

Correct. Hard disks are not fast enough but at the moment the problem still isn't really bad.
Krzysztof 'krzyszp' Piszczek

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Message 1219 - Posted: 12 Jun 2016, 20:57:33 UTC - in response to Message 1213.  

Ok... Server is under some pressure right now but at the moment everything looks ok :)

If you wish, I can show some statistics for server and (especially) disks load ;)

That would be interesting to see!
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Message 1220 - Posted: 12 Jun 2016, 21:02:35 UTC - in response to Message 1219.  

That would be interesting to see!
Of course!
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Message 1221 - Posted: 12 Jun 2016, 21:50:31 UTC
Last modified: 12 Jun 2016, 21:52:11 UTC

Ok.

As you know, the competition start last night at 0:00 UTC (2am in Poland).
I expect more pressure on the server and had predicted 200 or even 300 percent of average traffic and jobs more as usually.
At the moment, we had started with 48'000 jobs in progress yesterday, by 265'000 jobs at midnight last night and we still have about 230'000 jobs in progress right now - this is about 500% of average and server still works (even if slower then should by)!

To give you an idea what is going on server there is a small info from Munin (server monitoring tool):


The picture shows hard disks utilisation in real time. The black lines and arrow on it shows when work generator generates some tasks (in fact, every time it is 100'000 jobs for you), the red arrow shows
As you can see, the biggest pressure is on hard drive, not in CPU, RAM or other elements. Just MySQL operations really kills the machine and we currently operate on the border line, but... I'm ready to react and to kill all not really needed services just to keep project life :)

Again, thanks to you and other competitors, we get a good lesson about what we can do, and what we can't with current hardware... But at the end of the day - we have more work units processed in one day then usually in five!
Krzysztof 'krzyszp' Piszczek

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Message 1222 - Posted: 13 Jun 2016, 13:48:51 UTC

That's why it's never a good idea to have your databases on the same disk as the O/S which I'm assuming you have given you are showing /dev/sda. Keep up with that kind of load and the drive will fail.

If you had a separate SSD(s) for the database files it would work much faster.
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