Re: Re: Re: [haproxy] about least Connection problem
Hi, Sorry, but I don't understand what you mean :) Can explain again please? cheers On Thu, Sep 29, 2011 at 8:16 AM, 강동주 wrote: > hello. > > I already asked about least Connection Problem.. > > my answer is "It is working well" ( least Connection ) > > > but i hava another problem that haproxy is starting to dynamically.. > > i think some configuration( like : A connection : 2000 to 0 ) is Restart , > when haproxy is started to dynamically. > > do you hava a any idea? > > --this is my script- ( i called script when update server) > > time /haproxy/lib/haproxy -f /haproxy/conf/test.cfg -p /haproxy/pid/test.pid > -sf $(cat /haproxy/pid/haproxy.pid) > > > > > > > > thank you , hava a nice day > >
Re: Possibility to define internal redirect based on response header from a backend
Hi, This is currently not doable with HAProxy. cheers On Thu, Sep 29, 2011 at 4:33 PM, Galfy Pundee wrote: > Hi all, > I have two back ends - one serving fast python generated content and > one serving fast static content. I would like from the python to send > a response containing a header, for example > X-Location-Intenal: > http:///folder/file.ext > and then Haproxy to make the redirect internally without the client > noticing this. Is this possible with acl rules? Is it possible to > process response header coming from the back end? Any suggestions how > this can be done are welcomed. > > Regards, > Gal > >
Re: HAProxy 1.4.8 Tunning for load balancing 3 servers
Hi, IMO 1st thing would be setting up some kind of monitoring (haproxy frontend/backend stats and also server load), and haproxy logging, this makes debugging easier. Also check if your benchmarking tool didnt max out CPU/bandwidth, and try to use multiple machines for that (then u can get stats about conns/sec from haproxy) Alternative way of balancing load is (in addition to weight) setting connection limit per server, so if you know that for example small server can handle 20 simultaneous connections and over that performance of that server drops, set maxconn for that serv to 20 and let haproxy queue/redispatch ( option redispatch) excess connections so your servers always work on "maximum performance" point What is the average response time on not loaded server ? If for example serving request takes 10ms then with 128 simult. connections your benchmark tool can't do more than 12k req/sec, if it's 50 ms it can't do more than 1/ ( 0.05 / 128 ) = 2 560 conn/sec. 2011/9/28 Ivan Hernandez : > Hello, > > I have 3 webservers, a little old one that can handle 350req/s, a middle one > that handles 1700req/s and a bigger one that handles 2700req/s on tests with > the apache benchmark tool with 128 simultaneous connections. So I decided to > put haproxy as load balancer in other server so i can (theorically) reach up > to 4500req/s. > > I worked for a while trying many different configurations but the systems > seems to have a limit of the fastest server on the whole cluster. If I take > out from the cluster 1 or 2 servers, the haproxy performance is always the > same of the fastest server in the cluster. > Of course, load of each individual server goes down, what means that > requests are distributed between them, but speed doesn't goes up. > > So, here I copy my config in case it has some obvious error: > > Thanks ! > Ivan > > global > log 127.0.0.1 local0 > log 127.0.0.1 local1 notice > maxconn 8192 > user haproxy > group haproxy > > defaults > log global > retries 3 > maxconn 8192 > contimeout 5000 > clitimeout 5 > srvtimeout 5 > > listen web-farm 0.0.0.0:80 > mode http > option httpclose > option abortonclose > balance roundrobin > server small 192.168.1.100:80 weight 1 check inter 2000 rise 2 fall 5 > server medium 192.168.1.101:80 weight 2 check inter 2000 rise 2 fall 5 > server big 192.168.1.102:80 weight 8 check inter 2000 rise 2 fall 5 > > >
RE: HAProxy 1.4.8 Tunning for load balancing 3 servers
I suggest you use balance leastconn instead of roundrobin. That way the weights effect the ratios, but they are not locked in. If a server clears connections faster than the others, it will get more requests... if it falls behind it will get less... Given that multiple factors impact how many req/s a server can do such as number of cores, it's possible one server is faster at low loads with low latency responses, but under heavy loads a different server might have higher latency but can actually handle more simultaneous connections better and in total be faster. > -Original Message- > From: Ivan Hernandez [mailto:ihernan...@kiusys.com] > Sent: Wednesday, September 28, 2011 7:08 AM > To: haproxy@formilux.org > Subject: HAProxy 1.4.8 Tunning for load balancing 3 servers > > Hello, > > I have 3 webservers, a little old one that can handle 350req/s, a middle > one that handles 1700req/s and a bigger one that handles 2700req/s on > tests with the apache benchmark tool with 128 simultaneous connections. > So I decided to put haproxy as load balancer in other server so i can > (theorically) reach up to 4500req/s. > > I worked for a while trying many different configurations but the > systems seems to have a limit of the fastest server on the whole > cluster. If I take out from the cluster 1 or 2 servers, the haproxy > performance is always the same of the fastest server in the cluster. > Of course, load of each individual server goes down, what means that > requests are distributed between them, but speed doesn't goes up. > > So, here I copy my config in case it has some obvious error: > > Thanks ! > Ivan > > global > log 127.0.0.1local0 > log 127.0.0.1local1 notice > maxconn 8192 > user haproxy > group haproxy > > defaults > logglobal > retries3 > maxconn8192 > contimeout5000 > clitimeout5 > srvtimeout5 > > listen web-farm 0.0.0.0:80 > mode http > option httpclose > option abortonclose > balance roundrobin > server small 192.168.1.100:80 weight 1 check inter 2000 rise 2 fall 5 > server medium 192.168.1.101:80 weight 2 check inter 2000 rise 2 fall 5 > server big 192.168.1.102:80 weight 8 check inter 2000 rise 2 fall 5 >
Possibility to define internal redirect based on response header from a backend
Hi all, I have two back ends - one serving fast python generated content and one serving fast static content. I would like from the python to send a response containing a header, for example X-Location-Intenal: http:///folder/file.ext and then Haproxy to make the redirect internally without the client noticing this. Is this possible with acl rules? Is it possible to process response header coming from the back end? Any suggestions how this can be done are welcomed. Regards, Gal
Re: Unsubscribe
Le jeudi 29 septembre 2011 10:30:52, Cyril Bonté a écrit : > Le jeudi 29 septembre 2011 10:28:54, Dan Cryer a écrit : > > Unsubscribe Oops wrong action, sorry :-) I wanted to say that you need to send an email to haproxy+unsubscr...@formilux.org if you want to unsubscribe. -- Cyril Bonté
Re: Unsubscribe
Le jeudi 29 septembre 2011 10:28:54, Dan Cryer a écrit : > Unsubscribe > > -- Cyril Bonté
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