On 10/12/06, Justizin <[EMAIL PROTECTED]> wrote:
Servers failing will not cause problems, the only real risk would be tampering.
I was unclear, sorry. What I ment to say is that things go wrong. Your statement "this should not cause problems", is equivalent to "servers will not fail" and my point then was that in that case we can run with one server and be done with it. The reality is that servers fail. The reality is also that complex setups cause problems, no matter that they "shouldn't".
The reason for having many servers is to protect against failure.
With increasing number of servers you get better protection against failure. But the increasing protection you get gets less and less with each server. At the same time, configuration weirdness and other stuff is likely to INCREASE the error rate the more backups you have, because of Murphys law and other stuff. At one point, this increase in problems will overwhelm the increase in protection. I would also like to claim that this crossover point is nowehere near the previously mentioned number of eight servers, but rather closer two have one or two backups on another continent. Some maths: Say that a server fails one day per month in average (which is way more than we really will have). One backup server located on anotehr continent then means that we will statistically have DNS outage only one day in 900. Thats one day every three years. Two backups located on different continents will give us a failure rate of one day per 27000 days. That's one day every seventy-fifth year. How would five-six increasing backup servers in any reasonable way actually increase that realiability? It wouldn't, because for every server you add, you increase the risk of something going wrong. That's probably not an exponential risk, but I'm pretty sure somebody somewhere will fuck something up more often than every seventy-fifth year, so I don't actually think that having more than two backups on different continents is gonna increase realiability.
"Three or more" is best.
If you talk about total number of DNS servers, then I agree. Two at zoneedit, one or two more somewhere else.
Then take over, Lennart. I do not care.
Oh, you do care, because you get angry-
You said you don't understand why we don't just use zoneedit.
No. I have never said anything like that. Please read what I say, and answer that. I have been discussing politics on the internet for 15 years, and one thing I have learned is to completely stop any discussion when you get accused of an opinion you don't have because constructive discussion have at that point failed. Please read my emails, and answer they things I said, not the things I did not say.
What makes four servers less failure prone than eight, so long as they all agree that zoneedit is in charge.
I think that is a pretty obvious question. The more things you have the more things will fail.
Look, I'm sick of this conversation. I did a better job than anyone else in the conversation would have, and problems happened because we spent a week on something that we should have spent 2-4 weeks on. We learned something.
That is quite possible. I am not claiming you did a bad job. I have never said I would do a better job. I don't complain, whine or say you are stupid. I'm say one simple thing: Having eight servers is overkill and cause more problems than it solves. Please discuss this instead of trying to make this be about some sort of personal issue. It is not. You are a professional. I am a professional. Lets please all behave like it. -- Lennart Regebro, Nuxeo http://www.nuxeo.com/ CPS Content Management http://www.nuxeo.org/ _______________________________________________ Zope-web maillist - Zopeemail@example.com http://mail.zope.org/mailman/listinfo/zope-web