> Actually, you have what I'd call mulitple single points of > failure, which will make this configuration more vulnerable > to machine downtime vs. running on a single machine. If > either the web or the CF server goes down, is unresponsive, > or is being rebooted for maintenance, then you've lost the > web site. > > Similar to the common advice to run separate database and > CF/web servers. Unless you're clustering both systems or have > other ways to achieve redundancy, then it's virtually > unavoidable that this will lead to increased downtime. It's > probably still a good idea for a number of other reasons, > but overall reliability really isn't one of them.
With regard to the separation of web/application and database servers, I have to disagree. Sure, if either server is down the entire site is down, but there's a big difference in how web/app and database servers behave. Database servers tend to be reliable and stable, compared to web servers. I've had database servers running for years - they only needed to be shut down when critical patches were applied, or when they were physically moved, etc. (In the case of a database server isolated from the rest of the network, truly critical patches are few and far between!) On the other hand, database servers are much more likely to encounter problems if the server does crash. Web servers tend to crash often, but they don't have any data to lose. So, while having two servers means twice as many chances that a server is down, you won't find yourself restoring transaction logs from tape quite so often - that's the kind of thing that can cause significant downtime. Dave Watts, CTO, Fig Leaf Software http://www.figleaf.com/ Fig Leaf Software provides the highest caliber vendor-authorized instruction at our training centers in Washington DC, Atlanta, Chicago, Baltimore, Northern Virginia, or on-site at your location. Visit http://training.figleaf.com/ for more information! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Message: http://www.houseoffusion.com/lists.cfm/link=i:10:5931 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/10 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:10 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.10 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
