From: Yohanes Santoso <ysantoso-rubytalk@...>
Date: 2005-11-11T09:40:49+09:00
Subject: Re: Network computer name problem w/ Tiger and DRb

Jim Freeze <jim@freeze.org> writes:

> On 11/10/05, Eric Hodel <drbrain@segment7.net> wrote:
>
>> > But DRb still works, it just has to wait for a timeout  for the first
>> > remote call.
>> > All subsequent calls are fast.
>>
>> Right, DRb does an RDNS lookup to figure out the local host name,
>> which probably takes forever.
>
> What is RDNS. Is there a command line version of this so I can
> see it work?

reverse dns.


$ dig -x 68.142.226.47

; <<>> DiG 9.2.4 <<>> -x 68.142.226.47
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 943
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;47.226.142.68.in-addr.arpa.	IN	PTR

;; ANSWER SECTION:
47.226.142.68.in-addr.arpa. 1200 IN	PTR	p16.www.re2.yahoo.com.

;; Query time: 154 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Thu Nov 10 19:39:59 2005
;; MSG SIZE  rcvd: 79

$ dig p16.www.re2.yahoo.com.

; <<>> DiG 9.2.4 <<>> p16.www.re2.yahoo.com.
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 50006
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;p16.www.re2.yahoo.com.		IN	A

;; ANSWER SECTION:
p16.www.re2.yahoo.com.	1800	IN	A	68.142.226.47

;; Query time: 158 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Thu Nov 10 19:40:07 2005
;; MSG SIZE  rcvd: 55


YS