Is There Any Website Redundancy Service (dns Based)

Oct 5, 2009

Letís say I have the website myname.com

Myname.com is a very popular website and his content mirrors in 2servers (Server A and Server B) in 2 different datacenters (exactly same content).

When Server A fails due to datacenter or rack problem and no site is responding, then I need some service to transfer ALL traffic to server B. Is there any (paid or free) service doing such a thing? If yes, what about dns propagation? As far as I am concerned, dns propagation is a very slow procedure depending on each internet provider.

So how could we instantly make Server B to come live to ALL visitors? Is there any quick and reliable dns redundancy system without having to wait for dns propagation?

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Website Redundancy...

Sep 19, 2008

I have multiple hosting plans with different hosts and in different areas. I also have some STATIC websites.

I would like to know if there is a way for me to make my website available on multiple servers in case one of them is down.

I thought of changing the nameservers of my domain to

IP1 Hosted on host 1
IP2 Hosted on host 2
IP3 Hosted on host 3

of course the files will be uploaded to all three servers.

Is it possible and how should it be done?

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Aug 24, 2008

Not sure where this belonged so put it in web hosting as it could cover dedicated, colo or shared.

In a couple of months I am going to be launching a new e-commerce website for the company I work for, so it is absolutely vital that the website never goes offline, otherwise I will be in deep ****.

It will be hosted on a server that has been built to be very redundant; 2x Hotswappable Redundant PSU, 4x Hotswappable HDDs (RAID 6), Redundant NIC.

Sods law though to achieve this redundancy it will need to be on a colocated server, so if there is a major problem like the motherboard dying, then I will have to get down to the DC (3 hours away) and replace the entire server. Which wouldn't be practical as we would need a replacement server, all setup and ready to go, to do that.

Also, if there is a problem with the data centre itself, then we would be stuck until it is resolved. I have hosted sites with data centres in the past that experienced power or network problems which sent the sites down and it was totally out of our control to either prevent the downtime or restore the sites.

So to increase redundancy, and minimise downtime, I was thinking of load balancing between two servers. But then I assume they would both have to be hosted in the same data centre.

I was also thinking of having the site hosted on the server, but having some shared hosting (or a cheap dedi) ready to go just to fall back on if the server goes down. That way I can forward requests to the shared hosting as a temporary measure whilst the main server is restored. But the problem with that is I would probably need to get another SSL certificate. I would need to get the payment gateway provider (protx) to change the settings for the IP of the shared hosting, which knowing them will take 72 hours to process.

Budget really isn't an issue here if it can be justified, just looking for some ideas at this stage. There is no way this site can be down for a second longer than it needs to be.

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Also I want the emails to be Web accessible via a Web based interface such as
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What are the easiest way (Steps) to get the above task done?

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any system/script to take care of the user management side?

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I have a problem with my linux server using plesk 12x, I am using postfix as the email service, all emails are working from the webmail (horde) and from any email client using smtp.However the service is not working from the website (contact form on Wordpress) nor through the ssh commands. I have searched for few days but I still seem to have an issue.

Code:
ls -la /etc/alternatives/mta
the output is "nothing found".

and

Code:
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im now having a second server located somewhere else then my first one.

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How can i do this?

let say im having a domain "mydomain.com"

Server1 ip: 10.0.0.1 (Services; Apache, DNS)
server2 ip: 192.168.0.1 (Services; Apache, DNS)

mydomain.com nameserver would be.
ns1.mydomain.com -> 10.0.0.1
ns2.mydomain.com -> 192.168.0.1

Now will i have to create 2 NS record on both server plus A record.
I cant understand this part ?

Now how would i setup bind so they replicate zone btw each other?

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May 1, 2008

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DNS isn't my strong point, but I do know you can do this with MX records...so if the first server fails it tries the next until it gets a working one or reaches the end of the list. I'd just like to do it is A records.

It wouldn't be as simple as setting the nameservers like this would it?

ns1.host1.com
ns2.host1.com
ns1.host2.com
ns2.host2.com

Would it use the host1 nameservers as long as they're online, and if not failover to the host2 nameservers? If so, great, but what if the host1 nameservers are online but the server itself is not.

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Jun 2, 2008

I host several web clients that were recently impacted by the crap at ThePlanet. As I think about how to be more redundant (and repetitive) I'm not sure of my options.

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I am planning to buy a dedicated server and a shared server from a hosting company.
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Can somebody told me how to setup the 2 server so that my dedicated server can serve as the main server and if the dedicated server is down, the shared server can automatically be activated and visitors of my website will auto be redirect to the shared server.

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May 5, 2008

I am working on setting up a few servers that run cPanel and the usual software, minus any sort of DNS server. These servers are setup to sync all DNS records over to a cPanel "Dns Only" (ns1.domain.com), which in turn syncs all its records to a backup DNS server (ns2.domain.com).

In other words:
[Domain registrar]
| |
[NS1]--Sync-->[NS2]
|
(Sync to NS1)
|
Cpanel Web Server

Now, say something happens to NS1 and the sever goes completely offline (i.e. power supply dies, CPU goes bad, etc.), which of the following scenarios would actually happen:

1) Because the registrar lists both NS1 and NS2 as NS records, NS1 would time out and the DNS lookup would look to the secondary DNS (NS2) for the record.

2) The registrar would randomly give out NS1 OR NS2 because of round robin, and if NS1 is given to a client as the result of a DNS lookup, the site will appear down, however if the client happens to be referred to NS2, the site would appear online.

3) The site would be down no matter what.

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And Im aware that there are many 3rd party services that will take care of the DNS records and make them redundant (DYNDNS, DNSMadeEasy, etc) But I would prefer to keep the DNS in our full control.

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I'd like to let someone else provide the service. Use my 2U server or I can rent yours.

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I'm guessing that I can get this for about $500 per month with low bandwidth (this is an IT application, not peer-to-peer or torrents.). Let me know if my budget is off base. I think one megabyte/second sustained over the month, 95% averaged is suffiicent. At least until the business grows, we can then talk about getting racks of blades at higher cost.

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This evening (July 14th) from about 5:25pm-6:55pm many of our servers
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Matt Heaton / President Bluehost.com

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