[SETI@Home] hitparade van 2 april

[APClll]

BREAKING NEWS

April 3, 2008
Last night the BOINC database server crashed - it's recovering now and the project should be up shortly.

En dan nu verder met het overige nieuws

quote: http://setiathome.berkeley.edu/tech_news.php

2 Apr 2008 22:54:30 UTC
So far so good, running with the faceplate off the workunit download server. If this remains the case we'll get a free replacement faceplate from Adaptec. This little exercise has proven that this server is a bad single point of failure - if we actually lost all the data, it isn't a scientific disaster, but a BOINC disaster - there would be hundreds of thousands of workunits "in the field" that no longer exist, and are no longer verifiable. We can regenerate the workunits, but it would be a big waste of CPU time not to mention a public relations disaster (not like we haven't weathered those before).

Remember radar blanking? Here's a recap: unlike the classic data, the multibeam data is blitzed with radar sources, adding a lot of noise to a small subset of our workunits. The radar's time frequency is short but random, making it very hard to remove by simply randomizing data based on certain thresholds. This is more an annoyance that a threat to science. Arecibo implemented a "radar blanking signal" which we now get in our data, telling us exactly when the radar is on so we can "blank" the data exactly at that time. Among other things, we've been working to get this coded up and tested in the splitter for a while now. Jeff has been managing this recently and this morning had some final data and plots from workunits sent to our clients with the radar blanking and without. Looks like we solved the problem. Expect slightly less RFI workunits on average in the near future.

With Arecibo slated to be decommissioned in the not-too-distant coming years (write your local congressperson!) this has been an unintentional temporary boon for us as the observatory is prioritizing sky surveys to appease its current/remaining projects. That means we're collecting a lot more data than we originally intended, which means we can't seem to get disk drives back and forth between Arecibo and Berkeley fast enough. The bottleneck is our limited bandwidth to copy fresh data that arrives here down to HPSS (offsite archival storage) before erasing drives and sending them back. We're going to purchase another cheap SATA drive enclosure and try to use some of our excess Hurricane Electric bandwidth to speed up the archiving process.

Outside of that (and countless day-to-day chores) I got the basic plumbing of the "precess fix" program working. We unknowingly double-precessed all multibeam signal coordinates, so they aren't in J2000 as much as J1993 (the observatory's multibeam receiver code had coordinate precession built in, unlike classic receiver code). Not a major tragedy, and easy to revert - but this is one of those things where you want to make sure the math and logic are correct before updates billions of rows in a database.

Edit: Oh yeah, and I also sent out about 10000 reminder e-mails today. See other threads about waning user interest for more info. I'll send more each day.

- Matt

Nee, het belangrijkste van vandaag ben ik niet vergeten hoor. Kijk maar:
Welkom K3th3r
Welkom nouen

Oh, en misschien ook wel belangrijk, het cijfermateriaal...




DPC SETI@Home hitparade van 2 april 2008

Daily Top 30
Flushers: 111 / 796 (13,9 %)
pos		daily	member	total
1.	()	22.481	[DPC] Switch	1.299.264	(9)
2.	(2)	14.080	Searchy! Internet Services V.O.F.	4.123.643	(5)
3.	(1)	13.305	o25o & Dharkon	2.366.319	(6)
4.	(1)	7.260	Sp@ceNv@der	6.273.103	(4)
5.	()	4.830	[DPC]TeamGrazzie	6.424.245	(3)
6.	()	4.200	Ensign Wildfire	931.208	(16)
7.	()	3.549	Zwahillius	459.044	(28)
8.	(14)	3.199	[DPC]Spinpoint	2.362.019	(7)
9.	(51)	3.083	MAX3400	853.870	(17)
10.	(2)	2.636	[DPC] Brainy007	147.907	(65)
11.	()	2.634	[DPC]Trancemaus	1.435.910	(8)
12.	(3)	2.607	[DPC]Arie	179.563	(57)
13.	(3)	2.559	Mr Beamer	472.255	(25)
14.	(4)	1.778	sebastiaan	313.192	(45)
15.	(1)	1.725	holy-shit	208.109	(53)
16.	()	1.616	Administrator	175.774	(58)
17.	()	1.544	[DPC]Team Zuid-Holland	1.171.064	(11)
18.	(6)	1.523	ray	169.741	(59)
19.	(4)	1.426	Tijntje	828.483	(18)
20.	(3)	1.315	Freakandel	117.554	(79)
21.	(8)	1.305	hansR	9.350.486	(1)
22.	(1)	1.248	asfaloth_arwen	320.839	(44)
23.	(9)	1.112	Rydo	575.589	(24)
24.	(22)	1.050	Dadoke	578.486	(23)
25.	(1)	995	Mathijs	130.385	(74)
26.	(1)	980	Wiccan	5.030	(355)
27.	(14)	901	Berkie	736.826	(19)
28.	(2)	851	Edwin van der Geest	133.420	(72)
29.	(22)	808	F@stmem	655.813	(21)
30.	(4)	763	winwiz	86.135	(98)
	More...

Overall Top 30
pos		total	member	daily
1.	()	9.350.486	hansR	1.305	(21)
2.	()	9.116.462	REISinformatiegroep	0	(-)
3.	()	6.424.245	[DPC]TeamGrazzie	4.830	(5)
4.	()	6.273.103	Sp@ceNv@der	7.260	(4)
5.	()	4.123.643	Searchy! Internet Services V.O.F.	14.080	(2)
6.	(1)	2.366.319	o25o & Dharkon	13.305	(3)
7.	(1)	2.362.019	[DPC]Spinpoint	3.199	(8)
8.	()	1.435.910	[DPC]Trancemaus	2.634	(11)
9.	()	1.299.264	[DPC] Switch	22.481	(1)
10.	()	1.241.439	Jan Zandvliet & x-RaY99	628	(32)
11.	()	1.171.064	[DPC]Team Zuid-Holland	1.544	(17)
12.	()	1.049.597	[DPC]SjoQing	0	(-)
13.	()	1.043.115	[DPC] Anticimex & Lock Metaaldetectie	0	(-)
14.	()	1.038.635	Speedy67 & Friends	256	(56)
15.	()	1.038.177	visvogel	335	(49)
16.	()	931.208	Ensign Wildfire	4.200	(6)
17.	()	853.870	MAX3400	3.083	(9)
18.	()	828.483	Tijntje	1.426	(19)
19.	()	736.826	Berkie	901	(27)
20.	()	673.736	Psyed	0	(-)
21.	()	655.813	F@stmem	808	(29)
22.	()	626.692	MaNDaRK	0	(-)
23.	()	578.486	Dadoke	1.050	(24)
24.	()	575.589	Rydo	1.112	(23)
25.	(1)	472.255	Mr Beamer	2.559	(13)
26.	(1)	472.183	dpijl10	0	(-)
27.	()	469.595	ADHD NL	0	(-)
28.	()	459.044	Zwahillius	3.549	(7)
29.	()	427.390	audiforum.nl	0	(-)
30.	()	419.106	Team_Elteor_Borislavj	146	(74)
	More...

Teams Daily Top 15
pos		daily	team	total
1.	()	1.453.286	SETI.USA	571.995.298	(1)
21.	()	171.590	Canada	74.019.457	(23)
22.	(2)	170.037	TeAm AnandTech	88.260.914	(20)
23.	(1)	159.801	UK BOINC Team	67.213.419	(27)
24.	()	148.099	OcUK - Overclockers UK	126.694.610	(11)
25.	(3)	142.518	Universe Examiners	84.042.678	(22)
26.	(1)	133.187	BOINC SETI@home RUSSIA	61.038.595	(32)
27.	()	130.580	BOINC@Poland	44.063.676	(43)
28.	(4)	128.890	Dutch Power Cows	70.686.092	(24)
29.	(3)	127.217	Elite Games	38.678.925	(49)
30.	(1)	126.246	Boone Community School District - Iowa	38.878.000	(48)
31.	(1)	122.807	Amateur Radio Operators	68.320.972	(25)
32.	(2)	122.631	BOINC@AUSTRALIA	61.394.862	(31)
33.	(4)	120.796	Ars Technica	97.822.955	(16)
34.	(3)	112.497	BOINC.BE	38.380.819	(50)
35.	(2)	110.518	Team NIPPON	60.879.291	(33)
	More...

Teams Overall Top 15
pos		total	team	daily
1.	()	571.995.298	SETI.USA	1.453.286	(1)
17.	()	95.307.110	Team China	241.499	(10)
18.	()	92.078.016	SETI@Taiwan �x�W�ζ�	226.896	(13)
19.	()	91.107.068	Team Starfire World BOINC	231.002	(11)
20.	()	88.260.914	TeAm AnandTech	170.037	(22)
21.	()	85.840.444	Phoenix Rising	182.503	(18)
22.	()	84.042.678	Universe Examiners	142.518	(25)
23.	()	74.019.457	Canada	171.590	(21)
24.	()	70.686.092	Dutch Power Cows	128.890	(28)
25.	()	68.320.972	Amateur Radio Operators	122.807	(31)
26.	(1)	67.239.164	AUSTRIA - NATIONAL - TEAM	220.122	(14)
27.	(1)	67.213.419	UK BOINC Team	159.801	(23)
28.	()	66.920.857	US NAVY	177.776	(19)
29.	()	64.975.150	PC Perspective Killer Frogs	104.365	(37)
30.	()	63.525.561	Hewlett-Packard	96.098	(40)
31.	()	61.394.862	BOINC@AUSTRALIA	122.631	(32)
	More...

Megaflush Top 5
pos	Team	Flush	Date
1.	[DPC]TeamGrazzie	553.056	04-01-2008
2.	chelloo.com	261.227	09-01-2008
3.	[DPC]Spinpoint	174.423	14-06-2007
4.	REISinformatiegroep	165.307	18-04-2007
5.	hansR	124.717	18-04-2007
More...

Mijlpalen

Administrator	175.000
-BBT-HawkEye	80.000
Sjaack Elhorst	60.000
Wiccan	5.000
Jor Drilboor	4.000

When do you get them

Team	Average	Days
BOINC.Italy	87.588	756
Ars Technica	130.440	14.677

Nieuwe Leden

K3th3r	43
nouen	361

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Bron

[Diabolical]

Tis wel rustig... allemaal dankzij die stampede?

Oeps.. zou het bijna vergeten...welkom K3th3r en nouen

En natuurlijk gefeli paalhalers!

Zeg.. dat onze PV'er al minder produceert vanwege een migratie is toch geen reden om niet meer te reageren? Is ie met vakantie?

[ Voor 71% gewijzigd door Diabolical op 04-04-2008 08:15 ]