Question when testing Caching Server with resperf

khanh rua duonghoahoc_k49cd at yahoo.com
Tue Jan 25 02:55:01 UTC 2011


Hi, 

My bind version is bind-9.7.2-P3, resperf is dnsperf-1.0.1.0-1-solaris-10-sparc. 
On sparc 10u8 Solaris

Normally, resperf tool measures maximum throughput of caching server. So i did a 
test follow :

run with query 100-thousand -> maximum throughput ~ 9000  -> named process ~ 450 
MB
run with query 100-thousand -> "ran out query data" errors 

run with query 3-millions -> maximum throughput ~ 9000 -> named process ~ 400 MB
run with query 3-millions -> maximum throughput ~ 16000 -> named process ~ 500 
MB
.
.
.
run with query 3-millions -> maximum throughput ~ 16000 -> named process ~ 600 
MB
run with query 3-millions -> maximum throughput ~ 16000 -> named process ~ 600 
MB

So named cache ramains ~ 600 Mb. although many times i run the testing command. 

*** Now, what i want to know is, does resperf tool use the query which was used 
in previous command. For Example: If query 1 run 65000 first line, does the 
query 2 run the same query or it will run next 65000 line below. Or it ran query 
in file randomly.

If it does not ran the same, why the cache remains 600M. But i think it have to 
cache, because the maximum throughput is increase from 9000 to 16000. 

If u have my answer please note me where it is in the document from Nominum. 

Thank men. 
Tien86.


      
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