Balance of the 19 (Aug 04 2011)

Message boards : Technical News : Balance of the 19 (Aug 04 2011)

To post messages, you must log in.

AuthorMessage
Profile Matt Lebofsky
Volunteer moderator
Project administrator
Project developer
Project scientist
Avatar

Send message
Joined: 1 Mar 99
Posts: 1441
Credit: 213,689
RAC: 0
United States
Message 1136043 - Posted: 4 Aug 2011, 21:28:25 UTC

Not that it's all bright and shiny, but how about I just report some good news?

Looks like we got beyond the issues with the mysql replica on jocelyn. Basically we swapped in a bunch of different qlogic cards (which we had laying around) and one of them seems to be working. We're also using a new fibre cable (this new card had a different style jack so I was forced to do so). So far, so good - it recovered from the backup dump taken this past Tuesday, and currently as I type this sentence only 21K seconds behind (and still catching up best I can tell). Of course, we need to wait and see - chances are still good it may hiccup like before.

And also finally there's some non-zero hope in the HE connection issues front: one tech there may have a clue about a router configuration we may need to add/update on our end, though I'm still unsure what changed in the world to break this. I sent them some test results, now I'm just waiting to hear back.

You may have noticed some of our backend services going down today. This was planned. The short story is we just plucked 48GB of memory out of synergy (back-end compute server) and added it to oscar (the main science database server). So now oscar has 144GB of RAM to play with - the greater plan being to see if this actually helps informix performance, or are we (a) hopelessly blocked by bad disk i/o, and/or (b) dealing with a database so big that even maxing out memory in oscar at 192GB won't help. In any case, testing on this front moves forward. The more we understand, the more we learn *exactly* what hardware improvements we need.

- 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

ID: 1136043 · Report as offensive
ClaggyProject Donor
Volunteer tester

Send message
Joined: 5 Jul 99
Posts: 4623
Credit: 46,344,403
RAC: 2,871
United Kingdom
Message 1136046 - Posted: 4 Aug 2011, 21:32:59 UTC - in response to Message 1136043.

Thanks for the update Matt,

Claggy

ID: 1136046 · Report as offensive
mole

Send message
Joined: 19 Jan 02
Posts: 5
Credit: 26,427,356
RAC: 4,597
United States
Message 1136047 - Posted: 4 Aug 2011, 21:33:51 UTC - in response to Message 1136043.

Cool Matt, thanks for the update and no so bad news this time.

Your efforts and those of others on this project are appreciated.


ID: 1136047 · Report as offensive
Profile Jim_S
Avatar

Send message
Joined: 23 Feb 00
Posts: 4633
Credit: 37,395,863
RAC: 18,943
United States
Message 1136049 - Posted: 4 Aug 2011, 21:49:18 UTC

Thanks SO Much for the Good News Update Matt...Also Thanks for the HE update.
We (I) Appreciate the Hard WORK that you guys put into Our mutual Hobby/Work.
And the updates are nice too... ;-))



I Desire Peace and Justice, Jim Scott (Mod-Ret.)

ID: 1136049 · Report as offensive
Profile soft^spirit
Avatar

Send message
Joined: 18 May 99
Posts: 6438
Credit: 31,828,895
RAC: 6,510
United States
Message 1136053 - Posted: 4 Aug 2011, 21:59:39 UTC - in response to Message 1136043.

That is the kind of science I can understand. Regarding Oscars overload, one question comes to mind: Can the database be split in two.. Science East/Science West for example?

May your test work well Matt.



Janice

ID: 1136053 · Report as offensive
Profile Byron Leigh Hatch @ team Carl Sagan
Volunteer tester
Avatar

Send message
Joined: 5 Jul 99
Posts: 3637
Credit: 14,049,142
RAC: 8,691
Canada
Message 1136056 - Posted: 4 Aug 2011, 22:23:40 UTC

Thanks for the update Matt and thanks to the SETI@home crew for all your long hours of hard work ... Best Wishes Byron.

ID: 1136056 · Report as offensive
Profile Gary CharpentierCrowdfunding Project Donor
Volunteer tester
Avatar

Send message
Joined: 25 Dec 00
Posts: 18631
Credit: 21,442,307
RAC: 20,388
United States
Message 1136080 - Posted: 5 Aug 2011, 0:22:20 UTC

Thanks for the update Matt and i hope the tests are successful. Nice to know where the bottleneck is so we can open up the pipe.


ID: 1136080 · Report as offensive
Profile Jeff Mercer

Send message
Joined: 14 Aug 08
Posts: 90
Credit: 162,139
RAC: 0
United States
Message 1136106 - Posted: 5 Aug 2011, 2:36:51 UTC

Thanks Matt ! Good news at last !! Glad that things are looking better. All my best to you and the crew !

ID: 1136106 · Report as offensive
kittymanProject Donor
Volunteer tester
Avatar

Send message
Joined: 9 Jul 00
Posts: 45907
Credit: 815,075,211
RAC: 125,260
United States
Message 1136175 - Posted: 5 Aug 2011, 7:10:57 UTC

Thank you for all the news bits, Matt.
Hope your RAM tests on Oscar are positive, and hope that your info from HE is correct and there may be a fix on the horizon for some unhappy users.

Meow!


Cats.....what more does one need?

Have made friends in this life.
Most were cats.

ID: 1136175 · Report as offensive
Profile James Butler
Volunteer tester
Avatar

Send message
Joined: 26 Jul 11
Posts: 139
Credit: 6,266
RAC: 0
United Kingdom
Message 1136742 - Posted: 6 Aug 2011, 14:15:56 UTC

thanks for the good news matt fingers crossed they all go well :D:D


ID: 1136742 · Report as offensive
Profile Chris SCrowdfunding Project Donor
Volunteer tester
Avatar

Send message
Joined: 19 Nov 00
Posts: 38179
Credit: 21,333,806
RAC: 27,734
United Kingdom
Message 1137586 - Posted: 8 Aug 2011, 13:31:40 UTC
Last modified: 8 Aug 2011, 13:32:35 UTC

The short story is we just plucked 48GB of memory out of synergy (back-end compute server) and added it to oscar (the main science database server). So now oscar has 144GB of RAM to play with - the greater plan being to see if this actually helps informix performance, or are we (a) hopelessly blocked by bad disk i/o, and/or (b) dealing with a database so big that even maxing out memory in oscar at 192GB won't help.


You may remember Matt that some time ago, I did query the size of your Informix database, and whether for practical purposes it was managable. It's all very well for Informix to give theoretical maximum sizes. You are finding out first hand what actually works in practice.

ID: 1137586 · Report as offensive

Message boards : Technical News : Balance of the 19 (Aug 04 2011)


 
©2016 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.