Traffic Jams (Oct 13 2008)

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Profile Matt Lebofsky
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Message 818165 - Posted: 13 Oct 2008, 21:30:21 UTC

Busy day today. Jeff came in and found the server closet air conditioner went dead around 5am. So the entire closet was running pretty hot. Turns out there was another coolant leak (a problem we seem to deal with a lot). At any rate, this was fixed pretty quickly and everything cooled up to 2 degree colders than before this weekend.

Problems over the weekend. The mysql replica lost its connection - a known, common problem (hopefully will be fixed once the replica is on the same switch as the master db). I discovered that and gave it a kick. Hours later the upload server needed a kick as well. Eric discovered that in the morning and got it working again.

We're also fairly pegged at our network limit again, I think thanks to the workunit turnaround time being pretty low (i.e. fast). Plus I have to send extra raw data to our archive over the same link. Oh well. Expect data transfer headaches for the next qwhile.

I also am planning for our last OS upgrade tomorrow on jocelyn, the master mysql database server. This means, like when we upgraded bruno, an extra long outage tomorrow.

- Matt

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Message 818166 - Posted: 13 Oct 2008, 21:35:54 UTC


. . . Thank You for the Update Matt - it's much appreciated

btw - watCh out! - Eric's right behind you and he's goin' to shut the door behind you ;)))


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Message 818167 - Posted: 13 Oct 2008, 21:40:23 UTC

Thanks for the heads up for tomorrow, Matt!


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Message 818168 - Posted: 13 Oct 2008, 21:41:55 UTC

Sounds like hard work for you.
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Profile Gary Charpentier Crowdfunding Project Donor*Special Project $75 donorSpecial Project $250 donor
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Message 818200 - Posted: 13 Oct 2008, 23:22:02 UTC - in response to Message 818165.  

Busy day today. Jeff came in and found the server closet air conditioner went dead around 5am. So the entire closet was running pretty hot. Turns out there was another coolant leak (a problem we seem to deal with a lot). At any rate, this was fixed pretty quickly and everything cooled up to 2 degree colders than before this weekend.

Problems over the weekend. The mysql replica lost its connection - a known, common problem (hopefully will be fixed once the replica is on the same switch as the master db). I discovered that and gave it a kick. Hours later the upload server needed a kick as well. Eric discovered that in the morning and got it working again.

We're also fairly pegged at our network limit again, I think thanks to the workunit turnaround time being pretty low (i.e. fast). Plus I have to send extra raw data to our archive over the same link. Oh well. Expect data transfer headaches for the next qwhile.

I also am planning for our last OS upgrade tomorrow on jocelyn, the master mysql database server. This means, like when we upgraded bruno, an extra long outage tomorrow.

- Matt

Thanks for the heads up on the longer than normal outage.

Of if the coffee machine is in the server closet it is just an attempt to see why you have all those coolant leaks. Don't pay it any attention. :)

Gary


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Message 818479 - Posted: 14 Oct 2008, 14:41:00 UTC
Last modified: 14 Oct 2008, 14:41:19 UTC

....but it would be nice, to get those informations over the frontpage as a RSS-Feed.
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Message 818601 - Posted: 15 Oct 2008, 4:19:29 UTC

"qwhile" should be a real word.
mambo
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Message 819592 - Posted: 17 Oct 2008, 7:54:08 UTC - in response to Message 818165.  
Last modified: 17 Oct 2008, 7:54:51 UTC

Just a naive suggestion, since I guess you already considered this:

You pay for a 1Gbit/s connection, but you can use only 100Mbit/s due to local infrastructure. Why don't you set up some (at least one) WLAN connection with directed antennas between your building and a place where you can use that fast connection? This way you could use a load balancer to make it a single, but faster connection or you can transfer the raw data over the wireless link without affecting normal operation.
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Profile Gary Charpentier Crowdfunding Project Donor*Special Project $75 donorSpecial Project $250 donor
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Message 819717 - Posted: 17 Oct 2008, 15:51:54 UTC - in response to Message 819592.  

Just a naive suggestion, since I guess you already considered this:

You pay for a 1Gbit/s connection, but you can use only 100Mbit/s due to local infrastructure. Why don't you set up some (at least one) WLAN connection with directed antennas between your building and a place where you can use that fast connection? This way you could use a load balancer to make it a single, but faster connection or you can transfer the raw data over the wireless link without affecting normal operation.


I think there are two problems with that. One is it costs a pile of cash they don't have. Second I think the path length between Palo Alto and Berkley is a bit long.


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Message 819747 - Posted: 17 Oct 2008, 17:12:08 UTC - in response to Message 819717.  

Just a naive suggestion, since I guess you already considered this:

You pay for a 1Gbit/s connection, but you can use only 100Mbit/s due to local infrastructure. Why don't you set up some (at least one) WLAN connection with directed antennas between your building and a place where you can use that fast connection? This way you could use a load balancer to make it a single, but faster connection or you can transfer the raw data over the wireless link without affecting normal operation.


I think there are two problems with that. One is it costs a pile of cash they don't have. Second I think the path length between Palo Alto and Berkley is a bit long.


The distance can likely be dealt with, but it comes back to money. The farther you go, the more expensive the wireless devices.

The earlier post said "WLAN connection" and we have to remember that the "L" is Local.
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Profile Gary Charpentier Crowdfunding Project Donor*Special Project $75 donorSpecial Project $250 donor
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Message 820870 - Posted: 20 Oct 2008, 6:44:59 UTC - in response to Message 819747.  

Just a naive suggestion, since I guess you already considered this:

You pay for a 1Gbit/s connection, but you can use only 100Mbit/s due to local infrastructure. Why don't you set up some (at least one) WLAN connection with directed antennas between your building and a place where you can use that fast connection? This way you could use a load balancer to make it a single, but faster connection or you can transfer the raw data over the wireless link without affecting normal operation.


I think there are two problems with that. One is it costs a pile of cash they don't have. Second I think the path length between Palo Alto and Berkley is a bit long.


The distance can likely be dealt with, but it comes back to money. The farther you go, the more expensive the wireless devices.

The earlier post said "WLAN connection" and we have to remember that the "L" is Local.


Quite, and 30 miles over the bay isn't local. The other thing is we must remember bandwidth. If the point is to send a Giga bit bandwidth signal that will require a lot more than a wireless router!

The good thing is SSL is up the side of a hill and it does look out in the direction of Palo Alto. At PAIX I'm sure some sort of antenna tower would be required to get line of sight. Nothing too outrageous but still that requires permission of the landlord, PAIX's permission, building permits maybe even a zoning hearing. Never mind the FCC licenses. As for the installation likely something on the order of a six or eight foot dish at each end so you would still have good signal while the bay is full of fog. In any case this isn't going to happen unless a telephone company donates surplus equipment from a microwave link and a crew to install it and maintain it.

Gary


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Message boards : Technical News : Traffic Jams (Oct 13 2008)


 
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