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Thanks for all replies which have at least make
me read a lot of papers and HOWTO's to go deeper
than my first look.
I come back with 2 question to help me chose/tune
VS-DR or VS-NAT setup:
1. From what I've read and understood, I still
can't see how using LV-DR I can setup what
I want to do. Let's rember it quickly :
Suppose I have 1 Director and 1 Realserver.
My Realserver has 2 IP aliases RIP1 and RIP2.
What I want to do is to load balance my VIP
service between RIP1-1 and RIP1-2 giving an
output of ipvsadm looking like that:
IP Virtual Server version 1.0.8 (size=65536)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP VIP:www rr
-> RIP1-1:www XXXX 1 0 0
-> RIP1-2:www XXXX 1 0 0
So logically there are two Realservers, but physically
only one with 2 IP aliases.
I concluded that VS-NAT was the only suitable setup.
Am I wrong ?
2. Playing with VS-NAT, I ran some tests using testlvs
and I was wondering if I could find others results to
make some performance comparisons...
* ipvsadm setup *
IP Virtual Server version 1.0.8 (size=65536)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP VIP:www rr
-> RIP1-1:www Masq 1 0 0
-> RIP1-2:www Masq 1 0 0
-> RIP2-1:www Masq 1 0 0
-> RIP2-2:www Masq 1 0 0
-> RIP3-1:www Masq 1 0 0
-> RIP3-2:www Masq 1 0 0
* testlvs command line *
./testlvs VIP:80 -tcp -srcnum 100000 -packets 5000000
Here is what I observed :
* Director *
'vmstat 1' before running test :
r b w swpd free buff cache si so bi bo in cs us sy
id
0 0 0 0 159936 18656 16260 0 0 0 0 110 13 0 1
99
'vmstat 1' while running test :
r b w swpd free buff cache si so bi bo in cs us sy
id
0 0 0 0 159936 18656 16260 0 0 0 0 19204 13 0 1
99
0 0 0 0 159936 18656 16260 0 0 0 0 19167 10 0 1
99
0 0 0 0 159936 18656 16260 0 0 0 0 19187 12 0 1
99
0 0 0 0 159936 18656 16260 0 0 0 0 19145 12 0 1
99
0 0 0 0 159936 18656 16260 0 0 0 0 19240 10 0 1
99
0 0 0 0 159936 18656 16260 0 0 0 0 19104 34 0 3
97
0 0 0 0 159936 18656 16260 0 0 0 0 19346 19 0 1
99
0 0 0 0 159936 18656 16260 0 0 0 0 19194 10 0 1
99
0 0 0 0 159936 18656 16260 0 0 0 0 19182 12 0 1
99
0 0 0 0 159936 18656 16260 0 0 0 0 19099 10 0 1
99
'ipvsadm' while running test :
IP Virtual Server version 1.0.8 (size=65536)
Prot LocalAddress:Port Scheduler Flags
-> RemoteAddress:Port Forward Weight ActiveConn InActConn
TCP VIP:www rr
-> RIP1-1:www Masq 1 0 16635
-> RIP1-2:www Masq 1 0 16637
-> RIP2-1:www Masq 1 0 16632
-> RIP2-2:www Masq 1 0 16629
-> RIP3-1:www Masq 1 0 16637
-> RIP3-2:www Masq 1 0 16635
* RealServer *
./show_traffic.sh eth0 : 3150 packets/s
All numbers mentionned above have been catched just after they were quite
stable.
Regards,
Nico.
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