There are several packages available for Linux that provide HA services. Understudy, mentioned in the article, works well, and on top of that you can get into Pirahna from RedHat, which came from the Linux-HA project. Then there's TurboCluster from the TurboLinux guys. And those are just the first few that come to mind. You could even go so far as to "build your own" HA solution with scripts and some kind of remote service monitor like mon.
Note that all abovementioned projects are software-based HA rather than the hardware HA like your consultant has had set up, and every hardware solution I've looked at is extremely expensive and generally overkill for a lot of small to mid-size networks.
If you're just trying to provide 24/7 access to your web servers, you may want to look into some of the offerings that are out there, and see if they might fit your needs for future projects.
Slashdot Mirror
my bad....Pirahna came from LVS, not Linux-HA
There are several packages available for Linux that provide HA services. Understudy, mentioned in the article, works well, and on top of that you can get into Pirahna from RedHat, which came from the Linux-HA project. Then there's TurboCluster from the TurboLinux guys. And those are just the first few that come to mind. You could even go so far as to "build your own" HA solution with scripts and some kind of remote service monitor like mon.
Note that all abovementioned projects are software-based HA rather than the hardware HA like your consultant has had set up, and every hardware solution I've looked at is extremely expensive and generally overkill for a lot of small to mid-size networks.
If you're just trying to provide 24/7 access to your web servers, you may want to look into some of the offerings that are out there, and see if they might fit your needs for future projects.