Databases general query

Question

Ok so I have some free time on my hands at the moment and am once again looking into building more 'flexible' solutions where the client can update some parts of their websites themselves via a CMS.
A couple of queries:
1) A CMS requires a database to be efficient and effective? (I know some simple stuff can be changed via javascript but that's not what is required)
2) If so this is where I'm a bit concerned.
Lets take a simple example whereby I design a site (with an option of the client updating some sections). All is approved and uploaded to the remote server/database.
From that point on I have zero control over what the client changes in the CMS updatable sections of the website.
Some time later the host has a major problem and loses all the database updated information and concequently the site doesn't function correctly anymore or at least loses the updated information (if that's possible?)
That sounds a bit of a potential risk to me. Anyone else had a problem with lost database infromation once a site is live or see it as a risk?
Cheers
Os (Snowbound in Rochester UK)

Answer 1

Hi osgood
A good well designed cms system would also include a limited number of previous 'page' edits, (I normally save the last 5) or put another way the last 5 versions.
Also the database should be backed-up by your host at least every 24hrs, (if not change host). Unfortunately 'hacking' of databases through cms's is the favourite pastime of hackers, but it is a developers job to try and prevent this. This is why you should try and include a 'maintenance' contract as part of the package, this not only gives you a regular income but enables you to apply any know improvements required to your cms.
I am not a great fan of 'open-source' databases, mainly because they are the favourite type of site to hack, the code is freely available, and the location of the cms is well known.
Some time later the host has a major problem and loses all the database
updated information and consequently the site doesn't function correctly
anymore or at least loses the updated information (if that's possible?)
This is more often than not a consequence of the client altering something, (or someone they know well saying - "I can do improve that for you"), this is why I say use a maintenance contract that way you can check the date the pages where uploaded.
PZ