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Post by chris on Aug 6, 2014 16:07:49 GMT
Rackspace currently appear to be experiencing a major outage with several sites that I'm aware host with them being currently down. This is affecting our primary database server but not out load balancer, hence the service unavailable message.
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Post by chris on Aug 6, 2014 16:14:58 GMT
This now appears to have been resolved and the site is back up.
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Post by Ton ⓉⓞⓃ on Aug 6, 2014 16:35:47 GMT
Rackspace currently appear to be experiencing a major outage with several sites that I'm aware host with them being currently down. This is affecting our primary database server but not out load balancer, hence the service unavailable message. I noticed I couldn't get to AC that Rackspace host, but what does your statement mean? i.e. what's primary db and load balancer?
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Post by chris on Aug 6, 2014 16:45:21 GMT
Rackspace currently appear to be experiencing a major outage with several sites that I'm aware host with them being currently down. This is affecting our primary database server but not out load balancer, hence the service unavailable message. I noticed I couldn't get to AC that Rackspace host, but what does your statement mean? i.e. what's primary db and load balancer? Darn by asking me to explain you're going to uncover my ruse that I don't know what I'm doing!! Rackspace are our hosting provider so they provide the infrastructure (physical machines with cables and stuff that plug into the internet) on which our software runs. Our site uses multiple servers to host the software, with several computers connected together into a cluster, each performing a specific role. To provide redundancy in the event of an individual server failing some of those roles are doubled up, for example we currently have three web servers so that even if two fail the third should continue serving the site even if it gets a bit grumpy with the volume of requests that hit it. In this outage all of those servers became disconnected from the network so they couldn't talk to each other or the outside world. A load balancer is another computer that sits between our web servers and your browser. It accepts connections from your browser and then distributes them amongst all our web servers, sharing the work between them as evenly as it can. In this instance it wasn't affected from the outage and could still talk to the internet but it couldn't talk to any of our servers so it fell back to sending a predefined holding message saying the site was down for maintenance. That's why you could see a web page with that message but not the site itself. There's a whole heap of complexity on top of that but hopefully that helps you picture what happened.
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oldgrumpy
Member of DD Central
Posts: 5,087 
Likes: 3,233
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Post by oldgrumpy on Aug 6, 2014 17:32:07 GMT
Rubbish!!! A load balancer is 2kg of bananas in your right hand, in a bag, and 2kg bananas in your left hand .... in a bag. As for tomorrow's supply ..... ummm...  |
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Post by bracknellboy on Aug 6, 2014 22:28:46 GMT
Rackspace currently appear to be experiencing a major outage with several sites that I'm aware host with them being currently down. This is affecting our primary database server but not out load balancer, hence the service unavailable message. I noticed I couldn't get to AC that Rackspace host, but what does your statement mean? i.e. what's primary db and load balancer? Tech talk - don't you just love it.
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Post by bracknellboy on Aug 6, 2014 22:35:34 GMT
Rackspace are our hosting provider so they provide the infrastructure (physical machines with cables and stuff that plug into the internet) on which our software runs. Our site uses multiple servers to host the software, with several computers connected together into a cluster, each performing a specific role. To provide redundancy in the event of an individual server failing .......some of those roles ...we currently have three web servers .... A load balancer is another computer that sits between our web servers and your browser. It accepts connections from your browser and then distributes them amongst all our web servers, ...... That's why you could see a web page with that message but not the site itself. There's a whole heap of complexity on top of that but hopefully that helps you picture what happened. A brave attempt to de-mystify and good thing that you skimmed over the 'whole load of complexity on top of that': still, is your website up or down, and have you now managed to 'balance your load' ? Just asking.....
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Post by chris on Aug 7, 2014 5:04:43 GMT
All is well and balanced
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