Hi, I'm doing some stress test of uWSGI with 3 servers:
nginx -> uwsgi fastrouter -> 2x uwsgi backend (nginx and fastrouter are on same server) and one backend gets 2x more requests. I've tested it with apache benchmark using: ab -n 10000 -c 1 -H "Host: app.domain.com" "http://$nginx_address/$some_url"; - c 1 was used so that it's not casued by one backend responding faster then the other, requests are issued one after one so if fastrouter uses round robin to load balance, both backend should get equal number of requests but it does not. So how does fastrouter dispatch request by default? http://projects.unbit.it/uwsgi/wiki/FastRouter shows that one can write custom code for load balancing but all I want right now is simple rr over all subscribed vassals, how can I achieve that? results: 172.16.200.55: 6667 requests 172.16.200.56: 3333 requests second run, this time I've reloaded vassal on first node just after starting ab: 172.16.200.55: 3303 requests 172.16.200.56: 6679 requests so now second node got twice as much requests. It seems that by default fastrouter will prefer first working node (?). log from fastrouter startup: [2011-11-29 09:52:28.789360] [('172.16.200.53', 55923)] received message: [uwsgi-subscription] new pool: app.domain.com [2011-11-29 09:52:28.789494] [('172.16.200.53', 55923)] received message: [uwsgi-subscription] app.domain.com => new node: 172.16.200.56:3001 [2011-11-29 09:52:29.721830] [('172.16.200.53', 55923)] received message: [uwsgi-subscription] app.domain.com => new node: 172.16.200.55:3001 adding stats option to fastrouter instance doesn't give any fastrouter statistics but looking at the cpu usage on backends during the ab run, shows that one node constantly gets twice the load, and requests log confirms it: (ip,source port) '172.16.200.56',33894 '172.16.200.56',33894 '172.16.200.55',55817 '172.16.200.56',33894 '172.16.200.56',33894 '172.16.200.55',55817 '172.16.200.56',33894 '172.16.200.56',33894 '172.16.200.55',55817 '172.16.200.56',33894 '172.16.200.56',33894 '172.16.200.55',55817 Łukasz Mierzwa _______________________________________________ uWSGI mailing list [email protected] http://lists.unbit.it/cgi-bin/mailman/listinfo/uwsgi
