On Friday 23 December 2011 03:25:18 Dave Hart wrote:
> On Thu, Dec 22, 2011 at 19:11, Paul Sobey wrote:
> > - can ntpd's own reported offset (ntpq -p or loopstats) be trusted
> > (assuming high priority means it gets scheduled as desired)? I've
> > quoted
> > our apparent numbers at several peop
On Thursday 22 December 2011 20:17:57 Chris Adams wrote:
> The securities traders (especially HFT) want it. I suspect the OP is in
> that group. That level of timekeeping has been discussed here before.
Couldn't possibly comment :)
Thanks for responses so far - most enlightening.
Paul
__
On 2011-12-22, Paul Sobey wrote:
> Dear All,
>
> I work for a firm which requires clocks to be synchronised to quite a high
> degree of accuracy.
What does "quite a high degree of accuracy" mean? Nearst hour, minute,
second, millisecond, microsecond, nanosecond, picosecond,...?
Those could all f
On 2011-12-23, Richard B. Gilbert wrote:
> On 12/22/2011 2:11 PM, Paul Sobey wrote:
>> Dear All,
>>
>> I work for a firm which requires clocks to be synchronised to quite a
>> high degree of accuracy.
>>
>> We have an existing ntp-based infrastructure but want to improve on it
>> to the point wher
On Thu, Dec 22, 2011 at 19:11, Paul Sobey wrote:
> - can ntpd's own reported offset (ntpq -p or loopstats) be trusted
> (assuming high priority means it gets scheduled as desired)? I've quoted
> our apparent numbers at several people and the response is always 'pfft
> you can't trust ntpd to kn
Richard wrote:
> I think that the radio astronomers are some of the most demanding.
> Joe Average just needs to get to the bus stop or railway station in time
> to catch his chosen mode of transportation.
>
> The securities traders generally need to time-stamp their transactions
> within two seco
On 12/22/2011 9:17 PM, Chris Adams wrote:
Once upon a time, Richard B. Gilbert said:
The last time I heard, there were twenty-seven GPS satellites in
service.
There are currently 31 active.
There are usually anywhere from three to five or six above the
horizon at any given time.
It can be
Once upon a time, Richard B. Gilbert said:
>The last time I heard, there were twenty-seven GPS satellites in
>service.
There are currently 31 active.
>There are usually anywhere from three to five or six above the
>horizon at any given time.
It can be up to 8 or 9.
>This kind of accuracy is
On 12/22/2011 2:11 PM, Paul Sobey wrote:
Dear All,
I work for a firm which requires clocks to be synchronised to quite a
high degree of accuracy.
We have an existing ntp-based infrastructure but want to improve on it
to the point where the bulk of our hosts are synchronised to single
digit micr
thanks all,
let s say, i have one site in california and another one in new york.
all clients are independent to each other and connected to adsl.
all clients are spread out all over the internet.
six ntp servers are located in each site ( CA and NY)
and need to connect the internet to send
Dear All,
I work for a firm which requires clocks to be synchronised to quite a high
degree of accuracy.
We have an existing ntp-based infrastructure but want to improve on it to
the point where the bulk of our hosts are synchronised to single digit
microseconds of each other if possible. We
ben slimup wrote:
Hi Terje,
if i do not use nat how can i route private adresse to internet ?, i
do not want to use ipv6.
What is your setup?
Are you an ISP, or do you have some control over the client configuration?
Assuming you are using private addresses for all your clients, by far
the
On 2011-12-22, ben slimup wrote:
>
>
> Hi Terje,
>
> if i do not use nat how can i route private adresse to internet ?, i do not
> want to use ipv6.
You have your ntp servers outside the nat router. He did not say "Never
use nat" he said not to use nat for ntp.
>
> also i m planning to 2 boxes
Hi Terje,
if i do not use nat how can i route private adresse to internet ?, i do not
want to use ipv6.
also i m planning to 2 boxes with 3 card on each site, how can i load balance
between site if i m do not use round robin?
Thank for your support
> From: "terje.mathisen at tmsw.no"@ntp.o
ben slimup wrote:
Thank for prompt answer Chris,
Unfortunately, this ntp network should give time to specific clients
devices and not anyone on the public network.
according to your advice, better not using load balancer, thats good
how to load balance between ntp server if i do not use round
ben slimup wrote:
Dear all,
Thank you very much for support,
i do not have 1000,000 client, i need those ntp servers to serve a load
between 10 to 100 clients
over a public network with an accuracy of 100ms
those clients will use dns round robin to resolve 4 external ip, 2 IPs on ea
Richard B. Gilbert wrote:
> Please use your return key! Your message overflows a 22" wide screen!!!
>
> You will need a very fast link to your internet provider. I think T1
> service might be sufficient. Consult an expert or two!
You must be living under a stone when your newsreader has not y
Chris Albertson wrote:
> Is 1M additional clients really "overloading". I'd guess they
> already handle more than 100X that many clients.This is a series
> question. How many NTP clients are there in the world today. I'd
> not be surprised if there were a half billion. If so his 1M adds
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