Message boards :
Technical News :
Horizontal Hold (Jun 14 2007)
Message board moderation
Author | Message |
---|---|
Matt Lebofsky Send message Joined: 1 Mar 99 Posts: 1444 Credit: 957,058 RAC: 0 |
We are quite pleased with the BOINC database performance since the swap yesterday. In fact, it recovered quite nicely even though we lost our large backlog of results to send. When that queue reaches zero, that puts a little extra strain on the whole system as that increases the number of users reconnecting trying to get work. In any case, that queue is growing, and so far everything is running lickety split, relatively speaking. Bob is going to optimize some of the other non-feeder queries in the meantime to squeeze extra performance from MySQL. Oddly enough, yesterday afternoon I noted one of the lights on the 3510 (jocelyn's external RAID array) was amber. Turns out during the moving and power cycling the previous day we must have pushed an ailing drive over the dark edge into death. Fair enough - the array pulled in a spare and sync'ed it up before we realized what happened. So we'll replace that drive in due time - Meanwhile we have another spare at the ready in the system. Dell replaced the bad CPU in isaac, which fixed one problem, but we were still having unexplained crashes when using the latest xen kernel. However a new kernel came out and we upgraded to that this morning and so far so good. One theory is the bad CPU screwed up the previous kernel, which might explain why it suddenly had problems when it was fine for weeks before that. Then again.. how does a bad CPU permanently screw up a kernel image? Also in good news I got a solaris version of the multibeam splitter compiled today. I was slowed by lots of problems which, on hindsight, were kinda stupid though not my fault or anybody else's. As stated elsewhere this was more of an exercise to get used to the programming environment Jeff and Eric have been mired in for a while now, so I had to learn the ropes. Anyway.. it's running now and will take a while before we get any results. Basically this whole step is to give us the warm fuzzy feeling that, when we move splitters to off solaris and onto linux, there aren't any endian issues we haven't yet addressed. - 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 |
Nick Fox Send message Joined: 5 Jan 04 Posts: 46 Credit: 2,834,922 RAC: 0 |
Good to hear that you're getting on top of things Matt :o) |
KB7RZF Send message Joined: 15 Aug 99 Posts: 9549 Credit: 3,308,926 RAC: 2 |
Awesome news Matt. Thank you for the update. I will keep my fingers crossed for you guys that things stay going smooth for at least a while. :-) Jeremy |
Scarecrow Send message Joined: 15 Jul 00 Posts: 4520 Credit: 486,601 RAC: 0 |
there aren't any endian issues we haven't yet addressed. If they give you problems, let me know... we have a couple cowboys we can send that will help fight the endians. |
1mp0£173 Send message Joined: 3 Apr 99 Posts: 8423 Credit: 356,897 RAC: 0 |
there aren't any endian issues we haven't yet addressed. Are these little-endians or big-endians? |
jason_gee Send message Joined: 24 Nov 06 Posts: 7489 Credit: 91,093,184 RAC: 0 |
"The godfather of Calin Deffar Plune, the reigning emperor of Lilliput, happened to cut his finger while breaking his egg at the big end, and very rovally published a decree commanding all his liege and faithful subjects, on pains and penalties of great severity, to break their eggs in future at the small end." ( Gulliver's Travels, on the war between little-endians and big-endians ) "Living by the wisdom of computer science doesn't sound so bad after all. And unlike most advice, it's backed up by proofs." -- Algorithms to live by: The computer science of human decisions. |
KWSN THE Holy Hand Grenade! Send message Joined: 20 Dec 05 Posts: 3187 Credit: 57,163,290 RAC: 0 |
I think there's one of each, Solaris and Linux...(but I don't know which OS is which endian...) . Hello, from Albany, CA!... |
tullio Send message Joined: 9 Apr 04 Posts: 8797 Credit: 2,930,782 RAC: 1 |
I believe this is a feature of chips, not of OSs. Tullio |
Crunch3r Send message Joined: 15 Apr 99 Posts: 1546 Credit: 3,438,823 RAC: 0 |
That's true it's a CPU "feature". SPARCs are "Big Endian" and x86 are "little Endian". Join BOINC United now! |
Mark Messer Send message Joined: 21 Jul 00 Posts: 9 Credit: 18,836,143 RAC: 0 |
Didn't really know where to post this. I have a host I would like to delete, but there is a workunit hanging around (109013436) that won't let me. Everyone who chrunched this one finished it back in January, but it still says pending. By the way guys, great job dealing with all the problems. Keep up the good work. |
KWSN THE Holy Hand Grenade! Send message Joined: 20 Dec 05 Posts: 3187 Credit: 57,163,290 RAC: 0 |
SPARCs run Solaris, x86 (and x86-x64...) run various versions of Linux. (NTM Window$) . Hello, from Albany, CA!... |
tullio Send message Joined: 9 Apr 04 Posts: 8797 Credit: 2,930,782 RAC: 1 |
X86 run also the Solaris X86 version, Open Solaris. Tullio |
4pablo2 Send message Joined: 3 Aug 99 Posts: 14 Credit: 48,026,244 RAC: 0 |
Ye digital Gods, small minds diddle about "endians", You BOINC / SETI Geniuses manage Chaos ! Right on brothers, ride on .... In admiration, Pablo4 |
Crunch3r Send message Joined: 15 Apr 99 Posts: 1546 Credit: 3,438,823 RAC: 0 |
That's true, but SPARCs run linux too. This whole "endianess" is not dependant on OS it's just about how (simple) bit ordering is done by the cpu used. In some cases the programmer has to check the code for reordering instructions when porting the code. That's it. Join BOINC United now! |
tullio Send message Joined: 9 Apr 04 Posts: 8797 Credit: 2,930,782 RAC: 1 |
I've read on www.msnbc.msn.com that the ISS computers now in trouble are based on SPARC V7 space-hardened chips running a real-time UNIX OS. I hope they can get them running again, I think the Russian-American cooperation on the ISS is a signpost for all mankind. Tullio |
kittyman Send message Joined: 9 Jul 00 Posts: 51478 Credit: 1,018,363,574 RAC: 1,004 |
Seems like for the last few hours the server hit an non endian endian. "Time is simply the mechanism that keeps everything from happening all at once." |
Byron Leigh Hatch @ team Carl Sagan Send message Joined: 5 Jul 99 Posts: 4548 Credit: 35,667,570 RAC: 4 |
Hello Tullio thank you so much for your excellent post ! I agree with you so much ! "the survival of the the human species and the survival of planet Earth ... in his book ''COSMOS'' Carl Sagan writes: We know who speaks for the Nations but who speaks for the Earth ? who speaks for the human species ? Carl Sagan writes ''We speak for Earth'' ''Our loyalties are to the species and the planet. Our obligation to survive is owed not just to ourselves but also to that Cosmos, ancient and vast , from which we sprang'' Best Wishes to tullio in Italy: from: Byron in Canada |
tullio Send message Joined: 9 Apr 04 Posts: 8797 Credit: 2,930,782 RAC: 1 |
Hello Tullio Thanks Byron. Years ago I translated "Cosmos" for Mondadori Publishing House on my Olivetti typewriter. No PCs then. Now I am running SETI, Einstein and QMC on an old PII running Linux. Cheers. Tullio |
Dr. C.E.T.I. Send message Joined: 29 Feb 00 Posts: 16019 Credit: 794,685 RAC: 0 |
> so Well put - Thank You for that Quote Byron . . . "OUR OBLIGATION" BOINC Wiki . . . Science Status Page . . . |
Pepo Send message Joined: 5 Aug 99 Posts: 308 Credit: 418,019 RAC: 0 |
If they give you problems, let me know... we have a couple cowboys we can send that will help fight the endians. Are Scarecrow's cowboys capable of handling both types of endians? Peter |
©2024 University of California
SETI@home and Astropulse are funded by grants from the National Science Foundation, NASA, and donations from SETI@home volunteers. AstroPulse is funded in part by the NSF through grant AST-0307956.