[Pdns-users] DNS Cache "Training"

[Gerald]

Hello,


I just tested my DNS Rekursor and realized, that I have to ask a certain 
address twice so that the third time the result is delivered out of the 
cache. Is there a special reason for that behavior?


*********************** second try !!!! ************************
pechoc at bmeson-a:~/monitor$ dig orsn-ps1.p-server.de A @gwebmaster

; <<>> DiG 9.8.1-P1 <<>> orsn-ps1.p-server.de A @gwebmaster
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 43931
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;orsn-ps1.p-server.de.		IN	A

;; ANSWER SECTION:
orsn-ps1.p-server.de.	3600	IN	A	91.250.83.49

;; Query time: 925 msec
;; SERVER: 192.168.10.233#53(192.168.10.233)
;; WHEN: Tue Aug 20 19:23:54 2013
;; MSG SIZE  rcvd: 54


*********************** third try !!!! ************************
pechoc at bmeson-a:~/monitor$ dig orsn-ps1.p-server.de A @gwebmaster

; <<>> DiG 9.8.1-P1 <<>> orsn-ps1.p-server.de A @gwebmaster
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 39756
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;orsn-ps1.p-server.de.		IN	A

;; ANSWER SECTION:
orsn-ps1.p-server.de.	3592	IN	A	91.250.83.49

;; Query time: 1 msec
;; SERVER: 192.168.10.233#53(192.168.10.233)
;; WHEN: Tue Aug 20 19:23:56 2013
;; MSG SIZE  rcvd: 54

pechoc at bmeson-a:~/monitor$

Calling Computer was 192.168.10.9 .

Best regards
Gerald