Re: [nant-dev] Building and deploying applications with Nant

[Gordon Weakliem]

I'm not sure I really understand the situation, but I'll take a crack.
Ben Singh wrote:

In this example I have a core.dll, customer.dll, customerWS.dll and a
businessportal.dll.  If something in businessportal.dll changes then as far
as I know a complete build needs to be performed.

I'm confused by this. If something in an assembly that nothing else depends on changes, why would you need to recompile anything besides that assembly? If you change businessportal.dll, I don't see why you'd need a complete build.

However in theory only
the businessportal.dll should need to be recompiled. This means that the
entire site has to be recompiled (because I am using strong names) and more
importantly redeployed.

I'd first question whether you need strong names, but that's just me, avoiding complexity at all costs :-)

The scale of the problem becomes a lot larger when
you have deployments over multiple machines. Then the deployment scenario
for a small change becomes a lot more horrendous. Down time is a critical factor in our business and if we don't achieve a
certain level of uptime then we violate or contractual obligations. It
would be good to hear from some other people to see whether they are
experiencing the same types of problems.

We have load balanced systems where the load balancer (a Cisco Content Switch, I think) allows you to shut off a machine and drain traffic off of that server. Once that's been done, you can deploy that server and bring it back into rotation. If you have version problems (what you're deploying is totally incompatible with the prior version and can't co-exist at all, even for a few minutes), then you'd have to set up a stovepiped environment, or install one set of boxes and then work out some way to bring the new ones online while simultaneously bringing the old ones offline. Given that uptime is so critical, I'd say that you're best off trying to avoid situations where you're deploying stuff that breaks what's out there.

In short, it doesn't sound to me like you have a NAnt problem, it sounds like you have an architectural problem. Like I said, I may be totally misreading your situation, but that's what it sounds like to me.




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