IP failover is a popular technique for server redundancy. Servers run a so-called heartbeat process and in the event of one server failing to see the heartbeat of the other server, it takes over the IP address of the failing server.
IP takeover is implemented when two servers are connected on the same switch and are running on the same subnet. In addition to a redundant server, your infrastructure should make sure it has other parts that can be duplicated in case of emergencies and to ensure maximum uptime.
Backups: Backups can be deployed to ensure data held locally is also stored elsewhere on the cloud, or another data centre in a distant location.
This allows you to quickly restore data in the event of a disaster. Disk drives: Hot spares should be available so that if a disk drive in a primary server fails, another drive can immediately replace it. Using a RAID array should ensure that a server can keep running when there is a single disk failure. Power supplies: Redundant power supplies should be deployed on critical servers so that if the main power supply fails, it can continue to run. Internet connectivity: If your server needs to have a connection to the internet at all times, having a line from a different telecoms company is important.
If one line fails e. Practices for maximising the business value of digital infrastructure Consumption-as- a-Service subscriptions. Microsoft issues out-of-band patch for Windows Server sign-in bug. Solving cyber security's diversity problem.
Skip to Content Skip to Footer. This would be more in regards to server downtime issues, but could also be related to internet outages or routing issues in that provider's area. Therefore I am thinking of getting a second mail server account in a different geographical location. I know how MX weighted records can be setup to send email to different servers at different addresses, but there is part of this equation that I am not sure of If both mail servers have unique A records i.
Or can both servers, with unique IPs, have the same A name? If mail starts going to MAIL2 for a while and then routing sends it back to MAIL1 when it is back on, is Outlook for example going to pull the email from both servers or will the mail on the second server still be there, but forgotten until it has to connect again? If it pulls from both, would there be duplicate email message issues? I just need to be able to address the recipient-end questions so I understand it better I guess - the concept on its own and setup itself I can generally understand.
Online Services. The article below, shows how to configure an MX record to have a backup MX. Article ME This will mean that if the primary mail server is offline, that the secondary backup MX will accept the e-mail on behalf of the primary.
Slave Server is not currently serving the Project but is online in standby mode so that in the event of a Master Server failure, it will take over and become the Master Server. This Server takes precedence over all other redundant Servers should a conflict arise. All production configuration should be completed on this Master Server with the Slave Server offline. Once the Master Server is completely configured, the Slave Server is brought online.
Slave Server must be offline during the preproduction configuration process. Only as a final step will it be brought online. The general idea in configuring redundant Servers is to first completely configure the Master Server. Once the Project configuration is completed and Server Redundancy is enabled, you must manually copy the Project directory to the Slave Server. If you have configured your project including defining network shares for the Master and the Slave, then you may jump to Enabling Server Redundancy.
That project name is reserved for a special function within Server Redundancy. At this point, we recommend you fully configure the project on the Master Server before bringing the Slave Server online. This saves time and prevents loss of configuration should a fail-over occur mid-configuration.
We also recommend you define two 2 pairs of Virtual Points, for a total of four 4. The first pair of virtual points are used to determine if the Intelli-Site Server is online or not. What you name these virtual points is up to you.
There are few properties that need to be configured to enable redundancy. The second node in the list under the "Computers" node is the Slave Server.
If it hasn't been added, do so by clicking on the "Computers" node and selecting "Add Node If it isn't the second one in the list, drag all of the nodes in front of it except for the Master Server onto the "Computers" node. The dropped node will be moved to the end of the list. Once the correct node is the second one in the list, configure it as follows:. It will take approximately 90 seconds before assuming the Master role.
It's 90 seconds because that is the default value for the "Keep Alive Timeout" in the "Server Registration". To see the status of the redundant Servers, right-click on the Server icon and select "Open The "Intelli-Site Server Status" window appears.
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