Hi,
I have one VPS server, but now is down. How can I do load balancing with other vps?
Thanks!
It is possible but very, very complicated and very expensive.
The real question is why is your VPS down. If it is something that happens often than you should change to a different company for your VPS. Or maybe you should look at a dedicated server instead of a VPS. To put it in perspective, typical uptime on a good quality VPS or dedicated server should be 99.99% or 99.999% - it should not be something you would normally worry about.
If you do want more reliability than an ordinary VPS will give then look for something that some companies call a "Cloud Server". With this option, the storage (disk) is located on different hardware to the processing node (ram and CPU etc). So if the processing node has a hardware failure, everything comes back automatically on a different processing node without you having to do anything. And the storage will be on some kind of extremely reliable SAN (RAID6 or more, with regular backups). But this kind of option is much more expensive than a normal VPS.
Another option is to look for a hosting company that used Parallels Cloud Server 6 with Cloud Storage enabled. With this option, the data in your VPS is copies across several hardware nodes. If a hardware node fails, your VPS automatically comes up on a different hardware node. Again this option will be more expensive than a normal VPS.
Or if you want really complicated, you'd use something like gluster to create two or more exact, almost-real-time copies of your filesystem on different systems. In front of this you'd need some kind of load-balancing hardware or software appliance in order to direct traffic either to one system unless it failes, or evenly to both systems. Trying to keep databases and filesystems in sync behind all this is not simple, and you'd need some really good hardware with direct Ethernet links in order to make sure things work reliably, I think (but all this is an area I'm in no way an expert in, so don't assume I know what I'm talking about!!!)
There are other ways to do it too, but simplicity isn't usually high on the list of features for this type of thing.
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