Outs (Sep 29 2009)

Hello all - usual outage day again today. It's an interesting battle between our two mysql database servers. Okay maybe not that interesting. But mork has far more RAM, and jocelyn has a much faster disk array. And we see what we expect - mork is a much better master server as it can hold the database in memory and do all kinds of random access, but during the outages jocelyn does its database table compression much faster, as it involves a lot of sequential writes to disk. Anyway, we're back up - not much shakin' on that front.

We did have an outage last night for an hour. This was a known event involving some network infrastructure maneuvering down on campus. It was unclear how long this would take, so we didn't bother with any kind of panicky warning on the home page that we were going to be down for an unspecified amount of time. I think you're all used to that by now anyway. Plus, the good news is that this was one more task out of the way such that campus can get back to determining our bandwidth upgrade needs.

I found yet another radar blanking bug. I least I'm *finding* the bugs I guess, and it's much easier to fix them once they are spotted. Anyway, iteration 3 will commence sometime in the next day or so.

And thank you to Tiaan Geldenhuys, who donated a bit of javascript to our NTPCkr page such that if you zoom in on the Google skymap you'll see the border of the "pixel" which makes up this candidate.

- Matt

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-- BOINC/SETI@home network/web/science/development person
-- "Any idiot can have a good idea. What is hard is to do it." - Jeanne-Claude

ok, ty :)
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SETI@Home Informational message -9 result_overflow
with a general handicap of 80% and it makes much d' efforts for the community and s' expimer, thank you d' to be understanding.

" I'm *finding* the bugs I guess, and it's much easier to fix them once they are spotted."

I know how you feel,
even when a full solution to the problem cannot be found,
its nice to get to the point where it is possible to touch it, an make it move.

And thank you to Tiaan Geldenhuys, who donated a bit of javascript to our NTPCkr page such that if you zoom in on the Google skymap you'll see the border of the "pixel" which makes up this candidate.

- Matt

Wondered about what size drives your are using to transport reciever data up to CA?

1 TB drives are cheap nowadays. Let me know.

Ed

Wondered about what size drives your are using to transport reciever data up to CA?

1 TB drives are cheap nowadays. Let me know.

Ed

You might try to PM Pappa with the question....
I think he is still helping out with hardware donations.

If I am incorrect, somebody let us know.

Wondered about what size drives your are using to transport reciever data up to CA?

1 TB drives are cheap nowadays. Let me know.

Ed

You might try to PM Pappa with the question....
I think he is still helping out with hardware donations.

If I am incorrect, somebody let us know.

Me think it's Blurf. at least he did the thread in the Staff Forum.

Just want to intercept this thread and say that we aren't exact in need of data drives going to/from arecibo. We have about 20 of them, half 500GB, half 750GB, and that's plenty, given data taking rates, etc.

Still, if you want to donate 750GB drives, we'll use them as extra data xfer drives, and as spares in our many RAIDed servers. We do NOT accept western digital drives. I think they still have problems will linux systems with about 4GB RAM (something about linux c libraries doing memory maps to disk above 4GB causes random corruption on the western digital drives - no really great for big database servers - it's a bug that I think Eric discovered and wrote a simple program to easily recreate the problem - and the linux community still has yet to fix, though I may be wrong).

- 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

You might try to PM Pappa with the question....
I think he is still helping out with hardware donations.

If I am incorrect, somebody let us know.

I am only handling the Cash Donation issues. We are still looking for a Hardware Donation Volunteer.
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Pluto will always be a planet to me.

Cash Donation Specialist