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Re: "reasonable" numbers for QDNS?

From: Men & Mice Support
Date: Tuesday, May 16, 2000
Time: 5:37:19 am

At 7:49 AM -0400 5/16/00, Joseph D'Andrea wrote:
>For a relatively stable domain name configuration what would be some
>reasonable numbers for refresh, retry, Expire, Minimum and TTL.

The defaults are good...

Refresh: 28800. The secondary server will check for a new version
every 8 hours.

Retry: 7200. The secondary will retry every 2 hours if the primary
doesn't answer for the refresh check.

Expire: 604800. The secondary will stop serving the domain if it
can't contact the primary server for an update for a whole week.

Minimum: 86400. Other servers will cache most of your records (those
without explicit TTL's) for up to 1 day.

TTL: <blank>. The default TTL is perfectly adequate for the SOA
record; it doesn't need an explicit TTL of its own.


The only values you might want to consider changing are Expire and
Minimum. Don't set the Minimum value to more than 2 days, though -
when you do have to make changes, you want them to actually take
place in a reasonable amount of time. Expire can be set very high if
you control all the servers involved in serving the domain; 30 days
is not out of line.
____________________________________________________________________
Chris Buxton cbuxton@menandmice.com
Men & Mice http://www.menandmice.com
Makers of: QuickDNS Pro



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