Primary And Secondary Servers (web And Mail)
I have 2 servers 1 US and 1 UK.
What I wanna do is synchronize both of them using rsync. Once they've got synchronized, the UK will be the primary server and US will be secondary, in case the UK goes down.
my questions are
1. Is it possible that when the UK goes down, the A records for domain.com automatically switches to the US server so it can take over while UK is down.
ie. UK ip 112.113.114.1
US ip 222.111.444.5
domain.com A records = UK ip when up... but when UK is down, A records automatically changes to US ip.
2. And when the UK server goes up again, whatever changes made to US server will be pushed to UK. May it be files, accounts or e-mails.
I.E.
UK and US are synchronized every 30mins. UK and US both have e-mails 1-10.
Just before the sync time, UK server received an e-mail 11-15 then goes down. So the US Server will take over but do not have 11-15 mails, since it was received before sync time. During the UK downtime, US server received e-mails 16-20.
When the UK server goes up, will it be possible to sync both servers that both of them will have the e-mails 1-20?
I hope you get my point...
If these are not feasible, what can you advice as an alternative solution. All I want is to avoid downtimes, especially with mails as the business relies on this.
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I notice that some forums are run by multiple web servers. They offer choices for visitors from different regions so that they can enjoy a better speed when browsing. e.g. Visitors from USA use www1 , visitors from Europe use www2 My question is: how to synchronize the contents and files between different web servers? For the dynamic content, one database server can be setup. So that all php scripts on different web servers can retrieve from the same database source. But then, in a real-time forum, how to synchronize the files between the web servers? For example, one user from www1 uploads a file. This file will go to www1's filesystem. How to make this file appears in www2's filesytem? I can think of 'rsync' every minute between servers. But still it's not real-time, and there may be problems if sychronication can't be finished within the minute.
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I require Windows 2003 web hosting on Canadian datacenter (Canadaian IP address) for some websites of one customer. My exact requirement are Windows 2003 server 2 domains to host Total 20 Mb disk web space 20 mb Mysql database space (2 x 10 MB) PHP, ASP (classic), ASP.net support 20 MB mail space (2 x 10 MB) (optional, can put the pricing in optional) 4 email address AWSTATS Control panel Bandwidth requires will be less than 1 GB (total) per month. We currently are not planning to use email feature, just will be hosting 10 to 15 pages on 2 websites. but do provide us the pricing for the same Please give your best pricing for hosting on Canada Datacenter only. We will be paying with paypal or credit card.
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Second IP Recognized As Primary
I've been having this issue for almost a week now and it's driving me crazy. I made an IP switch from one peer to another. Anyways, I setup the gateway, primary IP, subnet, etc. Once the box was rebooted and came up with the new IPs I noted that cPanel was whining that the license was incorrect and noted that instead of xxx.xxx.xxx.98 it was recognizing xxx.xxx.xxx.99 I just switched the license over and it was done. But I'm having some major email issues as some remote hosts does not receive/send emails to my server as the hostname cannot be found since they also recognize the secondary IP .99 and not primary .98 as it should be. I've checked the entire settings again but just can't get around it. An ipconfig shows that the primary IP is in fact .98 which keeps me puzzled: eth0 Link encap:Ethernet HWaddr 00:50:45:5C:0D:90 inet addr:xxx.xxx.xxx.98 Bcast:xxx.xxx.xxx.111 Mask:255.255.255.240 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:134016363 errors:0 dropped:0 overruns:0 frame:0 TX packets:178062904 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:1556429887 (1.4 GiB) TX bytes:2181442479 (2.0 GiB) Interrupt:17
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How can you generate a Primary Zendid? Here is what we get: [root@test /]# cd /usr/local/Zend/bin/ [root@test bin]# ./zendid No primary IDs was detected. Try option 'allid' to see secondary IDs. [root@test bin]# ./zendid allid P:K66AJ-QD99H-R55T9-8LGHW M:5S9EX-2JC3Q-CJ4E4-KFZPV [root@test bin]# Can a Primary Zendid be created? And if so, how?. This is on a Centos VPS with: PHP 5.2.5 (cli) (built: Aug 1 2008 22:54:27) Copyright (c) 1997-2007 The PHP Group Zend Engine v2.2.0, Copyright (c) 1998-2007 Zend Technologies with Zend Extension Manager v1.2.2, Copyright (c) 2003-2007, by Zend Technologies with Zend Optimizer v3.3.0, Copyright (c) 1998-2007, by Zend Technologies
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I got a new server and need to move my primary and secondary DNS. I use cpanel. My idea was too: 1. Shut off my secondary DNS ns2. on my old server. (which I don't know how to do.) I was able to delete it from the nameserver Ip's link in whm. It deleted it but the server still has the IP assigned to it. 2. Set up my secondary dns on the new server. (cpanel wont let me because it says it already exists so I'm kind of stuck on this one too.) 3. Once the secondary is set up go to my registar and change the IP address. 4. move the sites, and turn off the primary ns server forcing everything to go to the new server or secondary dns. 5. move the primary..
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