On Friday 09 December 2005 14:36, Paul Smith wrote:
>On 12/9/05, Terry Polzin <fox3ec208@xxxxxxxxxxxxxxxx> wrote:
>> > Is there some gui for configuring NTP?
>>
>> /usr/bin/system-config-time
>
>Thanks, Terry. But getting
>
># /sbin/service ntpd restart
>Shutting down ntpd: [ OK ]
>ntpd: Synchronizing with time server: [FAILED]
>Starting ntpd: [ OK ]
>#
>
>whatever server I choose.
>
>Paul
Your systems clock must be within 500ppm of real time after ntpdate
sets it at the startup above. John Stultz wrote a little python
thingy that should be run for about 10 minutes, with ntpd shut down,
that will show you what the capability is. IIRC its called
test-drift.py or something like that.
Here is my local copy if I can find it again:
---------------cut here------------
#!/usr/bin/python
import commands
import sys
import string
import time
#default args
server = ""
sleep_time = 60
#parse args
if len(sys.argv) > 1:
server = sys.argv[1]
if len(sys.argv) > 2:
sleep_time = string.atoi(sys.argv[2])
#set time
cmd = commands.getoutput('/usr/sbin/ntpdate -ub ' + server)
cmd = commands.getoutput('/usr/sbin/ntpdate -uq ' + server)
line = string.split(cmd)
#parse original offset
start_offset = string.atof(line[-2]);
#parse original time
start_time = time.localtime(time.time())
datestr = time.strftime("%d %b %Y %H:%M:%S", start_time)
time.sleep(1)
while 1:
cmd = commands.getoutput('/usr/sbin/ntpdate -uq ' + server)
line = string.split(cmd)
#parse offset
now_offset = string.atof(line[-2]);
#parse time
now_time = time.localtime(time.time())
datestr = time.strftime("%d %b %Y %H:%M:%S", now_time)
# calculate drift
delta_time = time.mktime(now_time) - time.mktime(start_time)
delta_offset = now_offset - start_offset
drift = delta_offset / delta_time * 1000000
#print output
print time.strftime("%d %b %H:%M:%S",now_time),
print " offset:", now_offset ,
print " drift:", drift ,"ppm"
sys.stdout.flush()
#sleep
time.sleep(sleep_time)
--------------cut here--------------
If your clock isn't good enough, and the mobo has an nforce2 chipset,
try updating the bios, it helped me, a lot.
If the drift this script reports is usable, then try
deleting /var/lib/ntp/drift, which will be recreated from scratch by
ntpd after it has achieved a stable lock with whatever server it winds
up peering to.
--
Cheers, Gene
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Copyright 2005 by Maurice Eugene Heskett, all rights reserved.
