WHAT DOES YOUR SOLUTION DO?
The solution provides automated failover of any application on Windows and Linux. The failover can be on a LAN or a WAN environment. When failover occurs, it can notify you via email or text to inform you what has happened.
DO I NEED SHARED STORAGE?
Although it works with shared storage, this is not a requirement. Where there is no shared storage between the two servers, data replication is used to provide an up-to-date copy of the data on the backup server.
HOW DOES THE REPLICATION WORK?
The replication works real-time at block level, as one data block is changed; it is copied to the backup server. It has many features such as the ability to rewind data to a point in time, this is useful when there has been a data corruption, or a file has been accidentally deleted. The rewind feature is not just a snapshot, you can rewind to any point in time, and in the case of a lost file, when the file is recovered, you can wind forward to the latest point, and drop the recovered file back into the data.
ARE THERE MECHANISMS TO MINIMISE THE TRAFFIC ON THE NETWORK?
There are various ways that the traffic on the network is reduced. For example, only changes to data are replicated, white space is not replicated, up to 9 levels of compression can be set, or asynchronous replication can be used. For more details, refer to the documentation or contact us.
HOW DO THE LICENCES WORK?
The software is licenced on a per server basis. It is independent of the number of CPU’s or the underlying OS. Each product is licenced separately. You will require a combination of Data Replication, the LifeKeeper core software and a number of application recovery kits, which have been written to monitor your applications; in addition, you may want the Generic Recovery Kit for the additional applications and services which are not associated with any recovery kit.
HOW DOES THE SOLUTION WORK ON A WAN?
The LAN and WAN solutions work in exactly the same way. However, for WAN solutions external factors such as bandwidth and rate of change of data need to be taken into account.
DO I NEED HARDWARE TO BE THE SAME?
The LifeKeeper solution works with dissimilar hardware. However, it does require the operating system to be the same on both the active and standby servers.
I HAVE APPLICATIONS THAT I NEED TO RECOVER WHICH ARE NOT ON YOUR LIST?
We can recover any application with our customisation kit, this will allow you to put in the start and stop scripts for your application and the rest of the monitoring that uses LifeKeeper is generated from these.