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Jun.27 fukutomi
1.
persimmon load balancer Solution Engineering FUKUTOMI
Yutaka
2.
if no balancer
3.
with balancer LB
4.
thread LB listener server thread server thread server
thread
5.
server thread loop{ read from
client; write to server; read from server; write to client; }
6.
selector LB selector client server
7.
selector loop{ select; if(accept) connect to server; if(on
read) write to other; }
8.
session session data
9.
fool balancer LB session data NO
session data !! session error !!
10.
wise balancer LB session
data client server A X A X Y
11.
session with wise
balancer LB session data for A session data for B A B X Y client server A X B Y
12.
reliability LB
13.
when LB down LB
14.
active/standby LB LB active standby
15.
normal LB LB active standby a b (x) connect to “x” Hey!
I’m alive!! “active” is live. I stay as “standby”
16.
when active LB
is down LB LB active standby a b (x) connect to “x” no “active” is alive?
17.
failover LB LB active a b (x) connect to “x” I
become “active”. Hey! I’m alive!!
18.
終劇 (fin)
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