Continuing Progress


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Profile Matt Lebofsky
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Message 1051937 - Posted: 29 Nov 2010, 23:19:13 UTC

For those who were celebrating, hope you had a lovely thanksgiving weekend. Things around here were fairly mellow, though progress continues.

The thumper-to-oscar conversion is still on schedule. In fact, just minutes ago we dropped the old spike table now that all those spikes were copied into the current spike table. It's amazing how fast you can drop a table containing 1.3 billion rows, though I did feel a disturbance in the force.

This morning we stopped the assimilators so the database is in a quiescent state. We're now backing it up one last time, and tomorrow morning we hope to "recover" oscar using this backup, which means it'll get populated with all current scientific data. This may take a day, and then we'll burn it in by starting up the assimilators again, maybe run some NTPCkrs. If all goes well we're still on for opening the floodgates again early next week.

In the meantime Jeff and I continue to rearrange the closet, cleaning it up, shuffling servers between racks and breakers to regain some organizational sanity. We also were tired of having the kvm monitor on top of the rack which was hard to read from down below. This picture shows the current status of things, including the monitor now nicely at eye level.



- Matt

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Message 1051945 - Posted: 29 Nov 2010, 23:39:26 UTC

Thanks for the news and the pictures.

Take the time to get it right.

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Message 1051946 - Posted: 29 Nov 2010, 23:41:06 UTC - in response to Message 1051937.

Want some cable straps? ;-)


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Message 1051947 - Posted: 29 Nov 2010, 23:41:41 UTC

Nice! And thanks for the pic...
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Message 1051948 - Posted: 29 Nov 2010, 23:43:36 UTC

You guys really rock! Those servers are in the best hands possible!

Steve
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Message 1051951 - Posted: 29 Nov 2010, 23:48:26 UTC - in response to Message 1051946.

Want some cable straps? ;-)


that's a little expensive.

I just use a twist-tie. You can buy it in a dollar store :)

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Message 1051952 - Posted: 29 Nov 2010, 23:53:53 UTC

Thanks for the update Matt,

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Message 1051953 - Posted: 30 Nov 2010, 0:09:58 UTC

Matt,

Thanks for keeping us in the loop. You need to know we are all there with you in spirit:)


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Message 1051991 - Posted: 30 Nov 2010, 5:05:19 UTC

I'm still concerned about ventilation after seeing that picture. If the new servers get too hot, the project is at risk of going down again.
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Message 1051992 - Posted: 30 Nov 2010, 5:09:27 UTC - in response to Message 1051951.

Want some cable straps? ;-)


that's a little expensive.

I just use a twist-tie. You can buy it in a dollar store :)

Plastic cable ties can be had for a few dollars for hundreds of them.
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Message 1052018 - Posted: 30 Nov 2010, 7:24:29 UTC

Matt has probably thought of this and has an answer.

Since the work that out in the field on client computers would be minimal when restarting the project perhaps the "resend" option could be turned on at the servers to eliminate the ghost problem.
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Message 1052049 - Posted: 30 Nov 2010, 14:33:07 UTC - in response to Message 1051937.

Matt, thanks for the news!

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Message 1052050 - Posted: 30 Nov 2010, 14:40:23 UTC - in response to Message 1052018.

Matt has probably thought of this and has an answer.

Since the work that out in the field on client computers would be minimal when restarting the project perhaps the "resend" option could be turned on at the servers to eliminate the ghost problem.

The resend option only increases server load. So not a good idea.

And as every computer in the universe has no tasks and will be trying to make contact. It would be better to decrease the downloads/processor so that the host gets enough work for a few hours, and set the server enforced back-off to 60 mins and not the default 11 sec. The lower the server load the less likely chance of ghosts.

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Message 1052058 - Posted: 30 Nov 2010, 15:41:48 UTC - in response to Message 1052050.

...and set the server enforced back-off to 60 mins and not the default 11 sec...

The default is now 5 minutes (in fact 303 secs). ;-)

Gruß,
Gundolf

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Message 1052063 - Posted: 30 Nov 2010, 16:55:45 UTC

Excellent. Thanks for the update and pic. If I might ask, how much trouble would it be to replace your non-standard rack with a standard rack so that all the servers fit properly without having to be jury rigged?

A new rack shouldn't be that expensive, should it?
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Message 1052064 - Posted: 30 Nov 2010, 17:03:29 UTC - in response to Message 1052050.


The resend option only increases server load. So not a good idea.

And as every computer in the universe has no tasks and will be trying to make contact. It would be better to decrease the downloads/processor so that the host gets enough work for a few hours, and set the server enforced back-off to 60 mins and not the default 11 sec. The lower the server load the less likely chance of ghosts.


Not "every computer in the universe"... just every computer that has BOINC AND has connected to SETI...! (~ ½ a million, the last time I looked...)
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Message 1052065 - Posted: 30 Nov 2010, 17:05:13 UTC - in response to Message 1051992.

...and they look cleaner if the excess bit is cut off.

Want some cable straps? ;-)


that's a little expensive.

I just use a twist-tie. You can buy it in a dollar store :)

Plastic cable ties can be had for a few dollars for hundreds of them.


____________
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Message 1052066 - Posted: 30 Nov 2010, 17:05:53 UTC - in response to Message 1052063.
Last modified: 30 Nov 2010, 17:09:11 UTC

Excellent. Thanks for the update and pic. If I might ask, how much trouble would it be to replace your non-standard rack with a standard rack so that all the servers fit properly without having to be jury rigged?

A new rack shouldn't be that expensive, should it?


The main problem, as Matt has explained, is that there is no such a thing as a "standard rack" - every manufacturer seems to have their own (non compatible) standard...

The main problem with those cheap twist-ties is that the binding is metal, which can cause problems in a high-speed high-density data environment...
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Message 1052067 - Posted: 30 Nov 2010, 17:10:25 UTC

Great news and thanks for the pix!

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Message 1052114 - Posted: 1 Dec 2010, 1:35:12 UTC - in response to Message 1052066.

Excellent. Thanks for the update and pic. If I might ask, how much trouble would it be to replace your non-standard rack with a standard rack so that all the servers fit properly without having to be jury rigged?

A new rack shouldn't be that expensive, should it?


The main problem, as Matt has explained, is that there is no such a thing as a "standard rack" - every manufacturer seems to have their own (non compatible) standard...


Well, if it was I In charge, I'd give these guys a call (or a similar vendor)
http://www.racksolutions.com/home/all-products-by-photo/server-racks-cabinets-enclosures.html "Fits any server" and see if they can build me one that works.

The main problem with those cheap twist-ties is that the binding is metal, which can cause problems in a high-speed high-density data environment...


I prefer reusable velcro type wraps myself.

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