On Sat, Nov 5, 2011 at 15:45, steven Sommars <[email protected]> wrote: > Dave, > How do you see the ntpdc (/ntpd/ntpdc) transition happening? [I expect > most post 4.2.7p230 ntpd builds to use the default options] > http://www.eecis.udel.edu/~mills/ntp/html/ntpdc.html makes no mention of an > upcoming obsolescence/deprecation and likely few ntpdc users have planned > for it. Was there an announcement or web page? ntpdate is covered > in https://support.ntp.org/bin/view/Dev/DeprecatingNtpdate . > https://support.ntp.org/bin/view/Dev/DeprecatingNtpdc is only a > placeholder.
ntpdc.html does need to be updated to reflect the fact that ntpd 4.2.7p230 and later default to ignoring ntpdc queries. I didn't do so sooner because I was waiting for all its functionality to be mirrored in ntpq. There has not been an announcement of ntpdc deprecation until now, but there has been discussion about it for years. See these messages for examples: http://lists.ntp.org/pipermail/questions/2006-November/012007.html http://lists.ntp.org/pipermail/questions/2006-September/011295.html http://lists.ntp.org/pipermail/questions/2011-July/030042.html > To query a mix of ntpd server versions will now require use of a new ntpq > and a (deprecated) ntpdc and logic to determine which to use. Smoother > transition schemes are possible but may run counter to the simplification > goals. That is true for the types of queries previously supported only by ntpdc. I believe for the vast majority of operator queries, a recent ntpq can be used to query both older and newer ntpd. Also, while ntpdc is now deprecated, it is still part of the distribution, so newer systems can still be used to query previously ntpdc-only information from older ntpd instances. Given a specific scenario, I'd be happy to look at how best to query a mixed flock where some ntpd instances expose some information only via mode 7/ntpdc. > With its smaller user base deprecating ntpdc should be less contentious than > ntpdate was. I don't object to the changes(mode 7 is ugly), but believe > that some documentation work (e.g,. in DeprecatingNtpdc) may be worthwhile. > Steve Sommars The documentation I am most concerned with getting right is the HTML documentation distributed with the reference implementation, the latest version of which is published on Dr. Mills' site: http://www.eecis.udel.edu/~mills/ntp/html/index.html ntpdc.html is probably the best place to put advice about querying mixed flocks. I appreciate your attention to this issue. Cheers, Dave Hart _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
