On Tuesday 06 November 2007 05:36, G T Smith wrote:
James Knott wrote:
Damon Register wrote:
...
I noticed that no one else has mentioned this so I would like to add a suggestion. One of our sysadmins here at work tells me that good time is important to DNS servers so he suggested just using the ISP's DNS server for your NTP server. Anyone else have any comments on that?
Aside from the fact that my ISP doesn't provide NTP on the DNS server, why is DNS time so critical? DNS is simply a database lookup function.
But are not inter DNS server updates time stamped?... I would expect a DNS server to reasonably well time synchronised... but I would be surprised it acted as an ntp server as well...
I doubt DNS aging rules need millisecond-level precision and accuracy to operate properly or reliably. NTP is a high-precision, high-accuracy time protocol. From Wikipedia: -==--==--==--==--==--==--==--==--==--==--==--==--==--==--==--==- NTP uses Marzullo's algorithm with the UTC time scale, including support for features such as leap seconds. NTPv4 can usually maintain time to within 10 milliseconds (1/100 s) over the public Internet, and can achieve accuracies of 200 microseconds (1/5000 s) or better in local area networks under ideal conditions. -==--==--==--==--==--==--==--==--==--==--==--==--==--==--==--==- Randall Schulz -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org For additional commands, e-mail: opensuse+help@opensuse.org