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- Newsgroups: comp.protocols.tcp-ip
- Path: sparky!uunet!das.wang.com!wang!news
- From: amoss@huji.ac.il (Amos Shapira)
- Subject: Re: Is there a Internet distance measure?
- Organization: Mail to News Gateway at Wang Labs
- Date: 8 Sep 92 09:19:43 GMT
- Message-ID: <amoss.715943983@falafel>
- References: <dank.715818516@blacks> <dank.715894743@blacks>
- Sender: news@wang.com
- Lines: 27
-
- dank@blacks.jpl.nasa.gov (Daniel R. Kegel) writes:
-
- >Thanks to all who responded.
- >Perhaps I'll send out an ICMP ping packet to all the hosts on the list
- >that match some simple heuristic (e.g. same top-level domain preferred),
- >and take the first host to respond as the 'closest'.
-
- If you are going on the "ping" approach then you might be interested in
- the fping utility posted on the net a few weeks ago. It will alow you to ping
- several hosts simultanously.
-
- In general, I think you just better find (with traceroute) what's the closest
- server network-wise and wire it into the configuration of the programme, with
- the other servers as a backup. Though there are chances that this server might
- not be the best one to use all the time, I estimate the chances of a really
- drastic change due to network failures don't worth the time and network
- resources required to check the closest server every time you run the utility.
-
- Also note that hosts are able to answer ping without being fully functional
- (e.g. during system boot or shutdown or while in single user), so the ping
- aproach is not 100% foolproof.
-
- Cheers,
- --
- --Amos Shapira (Jumper Extraordinaire)
- C.S. System Group, Hebrew University, Jerusalem, Israel
- amoss@cs.huji.ac.il
-