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Technical News :
Striped (Dec 22 2010)
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Author | Message |
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Matt Lebofsky Send message Joined: 1 Mar 99 Posts: 1444 Credit: 957,058 RAC: 0 |
Everything on the oscar-raid-restripe project went along swimmingly, and I was able to take care of several steps at home last night so that we could get the whole project back online in the morning today. Funny aside #1: at the exact moment I was finally comfortable enough to issue the command that blew away the old raid device from my home terminal, the network connectivity in my house randomly disappeared. Needless to say this incited minor panic as I suddenly couldn't reach any SETI servers and thought I must have somehow locked up the whole server closet. Eventually I figured out it was a local problem, my home router rebooted itself and I was back in business. Phew. Funny aside #2: turns out when I installed the OS on oscar/carolyn I didn't bother removing the NetworkManager package, which gets installed by default for reasons beyond my power of conception. I've ranted about this before but it seems the only reason NetworkManager exists is to generate completely random, unexpected, obfuscated network problems on systems in order to give network administrators (a) something to do to kill time, and (b) ensure job security. In this case, without cause or prior consent it added funny loopback address statements in /etc/hosts which caused remote informix connections to fail. I immediately removed NetworkManager at that point and added a "exclude=NetworkManager*" line to yum.conf (which I should have done before). Anyway, right off the bat there seems to be at least some improvement with the smaller stripe size on the raid, but we're collecting i/o stats under load and have some tweaks in mind which may continue to help general performance. All told, this ended up just being a one-day outage well worth taking. Meanwhile, upon turning everything back on mysql started exhibiting some old, bad habits. I haven't seen this behavior in a long while, but sometimes when it gets hit hard enough it says, "Yo! Back off! In fact, I'm going to block all incoming queries and write to disk for 10-20 minutes. I won't tell you why, and there's nothing you can do about it." Fair enough - but if you were having trouble reaching the website an hour ago, that's the reason. That's pretty much it for this week. It's officially the Xmas holiday starting tomorrow. Whatever you choose to do, enjoy! I'll be checking in from home over the "time off," but we're hoping it's kind of a "set it and forget it" kind of weekend instead of an "oh well everything will be down until we return on Monday" kind of weekend. - 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 |
Claggy Send message Joined: 5 Jul 99 Posts: 4654 Credit: 47,537,079 RAC: 4 |
Thanks for the update Matt, and have a Merry Christmas, Claggy |
skildude Send message Joined: 4 Oct 00 Posts: 9541 Credit: 50,759,529 RAC: 60 |
Sounds like you've kept busy. Heck you've earned 4 day weekend. In a rich man's house there is no place to spit but his face. Diogenes Of Sinope |
Cliff Harding Send message Joined: 18 Aug 99 Posts: 1432 Credit: 110,967,840 RAC: 67 |
Matt, Thank for the update!! Oscar is sure proving his worth with the re-striping and re-loading of science DB. That thing sure is fasssst!!. We might have to replace all of the other servers just to keep up with him and Carolyn. Any idea of an ETA of the third server? Keep of the good work and have a very joyful Christmas!! |
soft^spirit Send message Joined: 18 May 99 Posts: 6497 Credit: 34,134,168 RAC: 0 |
Aww how nice, we got early servers back for Xmas.. And we did not get you anything :( Enjoy your holiday! Janice |
Bernie Vine Send message Joined: 26 May 99 Posts: 9958 Credit: 103,452,613 RAC: 328 |
Merry Christmas Matt, we all do really appreciate the work you all do. Despite sometimes being a bit grumpy :-) Bernie |
Jim_S Send message Joined: 23 Feb 00 Posts: 4705 Credit: 64,560,357 RAC: 31 |
Merry Christmas Matt, we all do really appreciate the work you all do. Despite sometimes being a bit grumpy :-) What Bernie said!!! ;-] I Desire Peace and Justice, Jim Scott (Mod-Ret.) |
Gary Charpentier Send message Joined: 25 Dec 00 Posts: 31009 Credit: 53,134,872 RAC: 32 |
Merry Christmas Matt and the rest of the staff. |
perryjay Send message Joined: 20 Aug 02 Posts: 3377 Credit: 20,676,751 RAC: 0 |
Merry Christmas Matt and all the gang there at SETI. Enjoy your holidays and here's hoping we won't have to see you before Monday. PROUD MEMBER OF Team Starfire World BOINC |
Geek@Play Send message Joined: 31 Jul 01 Posts: 2467 Credit: 86,146,931 RAC: 0 |
Merry Christmas to the Entire Staff at Boinc/Seti You earned it and thanks......................from all of us! Boinc....Boinc....Boinc....Boinc.... |
KB7RZF Send message Joined: 15 Aug 99 Posts: 9549 Credit: 3,308,926 RAC: 2 |
Nice work Matt and folks at the lab. From my family to yours, we wish you a very Merry Christmas! |
Dirk Sadowski Send message Joined: 6 Apr 07 Posts: 7105 Credit: 147,663,825 RAC: 5 |
Matt, thanks for the news! Merry Christmas and happy and relaxing holidays to the SETI@home crew, all members, not members and aliens out there! |
kittyman Send message Joined: 9 Jul 00 Posts: 51478 Credit: 1,018,363,574 RAC: 1,004 |
Simply ROFLMAO.... Matt, I have not read such a hilarious bit in years. Excepting the part where you thought you had crashed the whole closet...LOL. Even sys admins have a good day once in a while.... You and the whole Seti staff have a great holiday. If it breaks itself while you are celebrating, it'll wait. The birth of Jesus only comes around once a year. Merry for Chirstmas...from Mark and the kitties. Meow. "Time is simply the mechanism that keeps everything from happening all at once." |
Geek@Play Send message Joined: 31 Jul 01 Posts: 2467 Credit: 86,146,931 RAC: 0 |
Funny aside #1: at the exact moment I was finally comfortable enough to issue the command that blew away the old raid device from my home terminal, the network connectivity in my house randomly disappeared. Needless to say this incited minor panic as I suddenly couldn't reach any SETI servers and thought I must have somehow locked up the whole server closet. Eventually I figured out it was a local problem, my home router rebooted itself and I was back in business. Phew. This is so cool! Even the best get bitten once in a while. Boinc....Boinc....Boinc....Boinc.... |
Bill G Send message Joined: 1 Jun 01 Posts: 1282 Credit: 187,688,550 RAC: 182 |
Thanks for the update and enjoy the holiday. SETI@home classic workunits 4,019 SETI@home classic CPU time 34,348 hours |
seti@elrcastor.com Send message Joined: 30 Jan 00 Posts: 35 Credit: 4,879,559 RAC: 0 |
is the beta project going to be brought back up? it's kicking up a message it's still down for maintenance. |
B-Man Send message Joined: 11 Feb 01 Posts: 253 Credit: 147,366 RAC: 0 |
I'll second the question about the Beta project. Any plans to bring it back online. 2nd Hope the staff has a wonderful christmas holiday. May it all run smoothly over the weekend with no staff intervention needed. |
Mike Send message Joined: 17 Feb 01 Posts: 34380 Credit: 79,922,639 RAC: 80 |
Merry Christmas Matt, Jeff and all others at the lab. With each crime and every kindness we birth our future. |
tbret Send message Joined: 28 May 99 Posts: 3380 Credit: 296,162,071 RAC: 40 |
Rest ye merry, gentlemen. |
Helli_retiered Send message Joined: 15 Dec 99 Posts: 707 Credit: 108,785,585 RAC: 0 |
... LOL We all hope the second part become not true. :D However - Merry Christmas to you, your Family and the whole Staff! Helli A loooong time ago: First Credits after SETI@home Restart |
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