Eu não sei se é relevante, mas eu acho que pode ser devido a essa mudança em DNS do Ubuntu 12.04 Release notes
% bl0ck_qu0te%Quando executo 'time ntpdate -qd ntp.ubuntu.com', o Ubuntu 12.04 demora o dobro do tempo que o Ubuntu 10.04. Eu testei isso em várias máquinas físicas e virtuais com resultados semelhantes. (Não se preocupe com o fato de que o servidor não é capaz de alcançar o destino ntp)
Ubuntu 12.04:
# time ntpdate -qd ntp.ubuntu.com 14 Jul 23:33:30 ntpdate[12313]: ntpdate [email protected] Tue Jun 5 20:12:09 UT) Looking for host ntp.ubuntu.com and service ntp host found : europium.canonical.com transmit(91.189.94.4) transmit(91.189.94.4) transmit(91.189.94.4) transmit(91.189.94.4) transmit(91.189.94.4) 91.189.94.4: Server dropped: no data server 91.189.94.4, port 123 stratum 0, precision 0, leap 00, trust 000 refid [91.189.94.4], delay 0.00000, dispersion 64.00000 transmitted 4, in filter 4 reference time: 00000000.00000000 Sun, Dec 31 1899 16:00:00.000 originate timestamp: 00000000.00000000 Sun, Dec 31 1899 16:00:00.000 transmit timestamp: d3ace2c1.9d594e0f Sat, Jul 14 2012 23:33:37.614 filter delay: 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 filter offset: 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 delay 0.00000, dispersion 64.00000 offset 0.000000 14 Jul 23:33:39 ntpdate[12313]: no server suitable for synchronization found real 0m8.665s user 0m0.000s sys 0m0.000s
Ubuntu 10.04:
# time ntpdate -qd ntp.ubuntu.com 14 Jul 23:32:45 ntpdate[27970]: ntpdate [email protected] Tue Apr 19 07:08:19 UTC 2011 (1) Looking for host ntp.ubuntu.com and service ntp host found : europium.canonical.com transmit(91.189.94.4) transmit(91.189.94.4) transmit(91.189.94.4) transmit(91.189.94.4) transmit(91.189.94.4) 91.189.94.4: Server dropped: no data server 91.189.94.4, port 123 stratum 0, precision 0, leap 00, trust 000 refid [91.189.94.4], delay 0.00000, dispersion 64.00000 transmitted 4, in filter 4 reference time: 00000000.00000000 Wed, Feb 6 2036 22:28:16.000 originate timestamp: 00000000.00000000 Wed, Feb 6 2036 22:28:16.000 transmit timestamp: d3ace291.42321a2e Sat, Jul 14 2012 23:32:49.258 filter delay: 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 filter offset: 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 delay 0.00000, dispersion 64.00000 offset 0.000000 14 Jul 23:32:50 ntpdate[27970]: no server suitable for synchronization found real 0m4.755s user 0m0.010s sys 0m0.000s
Eu não sei se é relevante, mas eu acho que pode ser devido a essa mudança em DNS do Ubuntu 12.04 Release notes
% bl0ck_qu0te%