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Q & A: load balancer
#1
(02:58:14) guest: hello sir,,
(02:58:42) guest: do you know about load balancer?
(02:59:14) guest: can ehcp do that?


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(09:53:49) guest: hii sir,,,
(09:53:43) guest: do you know about load balancer?
(09:57:00) guest: assalamu'alaikum,,
(10:21:01) bv-yahoo: little
(10:21:34) guest: i have tried many article in google,,,
(10:21:45) guest: but i have stack with that,,,
(10:21:58) bv-yahoo: it is something advanced.
(10:22:18) bv-yahoo: mawzuun sakiil
(10:23:03) guest: can u give me some advice for load balancing?
(10:23:29) bv-yahoo: it depends heavily, what you want todo,
(10:23:33) bv-yahoo: what you want to balance,
(10:23:35) bv-yahoo: a web server,
(10:23:37) bv-yahoo: a dns *
(10:23:40) bv-yahoo: what ?
(10:23:59) guest: web server,,
(10:24:24) bv-yahoo: you have many visitors, and you want to balance
them in 2 or more server ?
(10:24:40) guest: yes,,
(10:25:12) bv-yahoo: this is called load balanced web server
(10:25:23) bv-yahoo: .
(10:25:35) bv-yahoo: you need a mysql server too in background of web servers.
(10:25:49) bv-yahoo: s1: server 1: webserver 1
(10:25:53) bv-yahoo: s2: webserv2
(10:25:58) bv-yahoo: s3: webserv3
(10:26:08) bv-yahoo: s4: mysql serv (single)
(10:26:20) bv-yahoo: s1,s2,s3 should have different ip
(10:26:33) bv-yahoo: s1-3 is connected to s4,
(10:26:41) bv-yahoo: s4 is used for all database connections
(10:26:48) bv-yahoo: for all websites in s1,2,3
(10:27:02) bv-yahoo: a website is in all of s1-3
(10:27:19) bv-yahoo: it is better that s1-3 sees/connected to same
storage system, hdd
(10:27:27) bv-yahoo: so, they all see same files.
(10:27:32) bv-yahoo: in this way,
(10:27:54) bv-yahoo: whenever a user comes to any of s1,s2,s3, it can
see web content
(10:28:03) bv-yahoo: dns of domains are like
(10:28:20) bv-yahoo: www.xxx.com -> ip of s1, ip of s2, s3, i mean 3 A records
(10:28:22) bv-yahoo: in this way,
(10:28:28) bv-yahoo: one user goes to S1,
(10:28:31) bv-yahoo: other s2
(10:28:33) bv-yahoo: other to s3
(10:28:38) bv-yahoo: so, this is load balanced
(10:28:53) bv-yahoo: understand ?
(10:29:31) guest: yess,,
(10:30:08) bv-yahoo: there are some hardware load balancers too.
(10:30:26) guest: whats that?
(10:30:39) bv-yahoo: it is a device, like a switch
(10:30:58) bv-yahoo: which does load balancing, between 3 servers.
still 2 or more servers is needed.
(10:31:04) bv-yahoo: but load balancing is done by switch, not dns
(10:31:39) bv-yahoo: do you have a budget for this ? i can try to
setup a load balanced system for you , if you have some budget
(10:37:28) guest:
if i haven't the second server,,can i perform my server with high performance?
my server is
intel xeon,,
RAM 8Gb,,
harddisk 500Gb,,
(10:37:51) bv-yahoo: how many visitors do you have ?
(10:37:55) bv-yahoo: per day
(10:38:00) bv-yahoo: how many domains ?
(10:38:31) guest: 2 domains,,,
100 per day,,

if user online 100,,
thats server is very slow,,
(10:48:21) bv-yahoo: 100 user per day is very low, for a normal webserver.
(10:48:26) bv-yahoo: I mean,
(10:48:30) bv-yahoo: you dont need a load balanced system
(10:48:37) bv-yahoo: you only need to fine tune your server
(10:49:07) bv-yahoo: my server has 60 domains
(10:49:20) bv-yahoo: 2000 users/day
(10:49:26) bv-yahoo: at least
(10:49:39) guest: wow,,
(10:49:56) guest: thats pretty,,,
(10:50:08) bv-yahoo: you use ehcp ?
(10:50:18) guest: yes,,
(10:50:39) guest: iamvery like it,,
(10:50:48) guest: because easy to install,,
(10:50:53) bv-yahoo: you have 100 users per day ?
(10:51:18) guest: yes 50-100 users,,
(10:51:58) bv-yahoo: no,
(10:51:59) bv-yahoo: http://www.xxxxxxxx.com/webstats/
(10:52:01) bv-yahoo: look at this
(10:52:08) bv-yahoo: you have 1200 users per day approx
(10:52:57) bv-yahoo: but something is wrong with your server.
(10:53:26) guest: oohh,,,i dont know that,,,
whats wrong sir?

(10:53:29) bv-yahoo: quite slow, and webstats is missing.
(10:53:45) bv-yahoo: dont know what is wrong yet, but something is
wrong. i mean slow..

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