Furthermore, a couple of hours prior to the move, drop it to 5 minutes and
you should experience virtually no downtime and no propogation delays. The
exception to this will be networks that don't honor the TTL in your DNS
settings. This, however, only affects users who use that network's DNS and
mail servers. Everyone else shouldn't even notice a hiccup.
Another thing to consider is to have a secondary email server to catch
incoming messages to your domains. That mail server doesn't have any
mailboxes or listservers for your domains, it simply forwards any messages
that it receives to your working mail server. This keeps you from losing
any incoming messages that might otherwise go undelivered during network
outages or machine downtime. You wouldn't have to operate or manage this
server... secondary mail service is often offered as a service by your ISP,
or you can arrange with a colleague to have his mail server act as a
secondary for your domains.
Set it up in your DNS with the 'real' mail server having a higher MX
priority. That mail server will always be tried first and the secondary
tried only if a connection with the first fails.
houseoffusion.com A 64.118.64.245
MX 10 houseoffusion.com.
MX 20 mail.cfhosting.com.
www CNAME houseoffusion.com.
Jim
----- Original Message -----
From: "Tony Schreiber" <[EMAIL PROTECTED]>
To: "CF-Talk" <[EMAIL PROTECTED]>
Sent: Sunday, September 30, 2001 8:53 PM
Subject: Re: (Admin) Machine move
> The TTL is the Time-To-Live of the DNS information from your DNS servers,
> it means how long the information remains valid before the DNS server
> requesting the info will consider old and request new info. If you drop
> your TTL's to like 60 minutes a few days before the move, then name
> servers around the net will start to have the 60 min TTL's in cache and
> request a new ip within an hour. Essentially, once the move takes place,
> you'd only have an hour of time with old ip info around the net. Once the
> move is complete, change your TTL back to 24 hours or whatever your
> default value is...
>
> > I don't exactly understand what you mean.
> >
> >
> > > Sounds great! Would not lowering the ttl values on the domain for the
> > > few days preceding the move stop any dns outages from occuring in the
> > > first place?
> > >
> > > jon
> > >
> > > Michael Dinowitz wrote:
> > >
> > > >CFHosting.com, a major supporter of the House of Fusion lists and the
> > host of our box will be moving said box to a new location (with higher
> > bandwidth). This will result in an outage of mail for a few hours today
> > (Sunday Sept. 30) and will probably result in some small DNS problems in
the
> > next 2 or 3 days as it propagates.
> > > >
> > >
> >
>
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