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Re: Any good time servers around?



Dr Andrey Tsouladze <andy@spl.co.il> wrote:
|Hi,
|
|Not exactly a Linux question, but not far from it either...
|
|Does anybody know/have a list of reliable time servers here in Israel? I
|mean computers which will supply correct time when approached with 
|`netdate'.

Dunno about netdate, I run (and recommand) xntpd ("THE" implementation
of the Network Time Protocol).  Here is the relevant part from my home
machine's /etc/ntp.conf:

#server relay.huji.ac.il
#server tavor.openu.ac.il
#server vmsa.technion.ac.il
#server ntp.psi.net
#server cisco2.tau.ac.il
#server milo.mcs.anl.gov
#server tau.man.ac.il
server 147.233.128.1
server 132.68.7.2
server 128.139.6.1
server 192.77.171.2
server 140.221.10.70
server 132.66.12.2
server 128.139.200.16

Contrary to what someone else wrote, my experience says that the closer the server the better, for two main reasons:

1. The most problematic issue about network time synchronization is that
   it is impossible to accuratly measure the delay introduced by the
   network, and the closer the server the less likely it is that NTP's
   highly sophisticated algorithm is wrong (or, actually wrong by a
   smaller margine).

2. The closer the server is there are more chances that you will get
   through to it (more hops -> more points of failure).

|I asked Netvision, and they replied in the negative, to my surprise.

Don't be suprised.  My technical contacts with them so far haven't
revealed much talent or knowledge.

--Amos

--Amos Shapira                    | "Of course Australia was marked for
133 Shlomo Ben-Yosef st.          |  glory, for its people had been chosen
Jerusalem 93 805                  |  by the finest judges in England."
ISRAEL        amos@gezernet.co.il |                     -- Anonymous


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