Highload осень 2012 лекция 1

http://www.liveinternet.ru/stat/mail.ru/mins.html

http://www.liveinternet.ru/stat/vkontakte.ru/mins.html

Статистических пакетов в секунду (RPS,PPS)

Nginx frontend active connections

Доступность % Время простоя в год Время простоя в месяц
99% ("две девятки") 3.65 дней 7.20 часов
99.5% 1.83 дней 3.60 часов
99.9% ("три девятки") 8.76 часов 43.2 минут
99.95% 4.38 часов 21.56 минут
99.99% ("четыре девятки") 52.56 минут 4.32 минут
99.999% ("пять девяток") 5.26 минут 25.9 секунд
99.9999% ("шесть девяток") 31.5 секунд 2.59 секунд

helloworld.pl:
#!/usr/bin/perl
print "Content-type: text/htmlnn";
print "<H1>Hello World</H1>n";
%ENV:
DOCUMENT_ROOT = /usr/local/www
GATEWAY_INTERFACE = CGI/1.1
HTTP_ACCEPT = text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
HTTP_ACCEPT_CHARSET = ISO-8859-1,utf-8;q=0.7,*;q=0.3
HTTP_ACCEPT_ENCODING = gzip,deflate,sdch
HTTP_ACCEPT_LANGUAGE = en-US,en;q=0.8
HTTP_CACHE_CONTROL = max-age=0
HTTP_CONNECTION = close
HTTP_COOKIE = p=uc0bAMnfrgAA;
t=obLD1AAAAAAIAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAAAAAAdAA4FxQcA; VID=1Y6UOS0sMI11
HTTP_HOST = bykov.corp.mail.ru
HTTP_USER_AGENT = Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_4) AppleWebKit/537.1 (KHTML, like Gecko)
Chrome/21.0.1180.89 Safari/537.1 MRSpy/1.0.0
QUERY_STRING =
REMOTE_ADDR = 194.186.63.231
REMOTE_PORT = 51638
REQUEST_METHOD = GET
REQUEST_URI = /cgi-bin/hellowworld.pl
SERVER_ADDR = 127.0.0.1
SERVER_ADMIN = bykov@corp.mail.ru
SERVER_NAME = bykov.corp.mail.ru
SERVER_PORT = 80
SERVER_PROTOCOL = HTTP/1.0

#include <httpd.h>
#include <http_protocol.h>
#include <http_config.h>
static int helloworld_handler(request_rec *r) {
if (!r->handler || strcmp(r->handler, "helloworld")) {
return DECLINED;
}
if (r->method_number != M_GET) {
return HTTP_METHOD_NOT_ALLOWED;
}
ap_set_content_type(r, "text/html;charset=ascii");
ap_rputs("<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">n",
r);
ap_rputs("<html><head><title>Apache HelloWorld "
"Module</title></head>", r);
ap_rputs("<body><h1>Hello World!</h1>", r);
ap_rputs("<p>This is the Apache HelloWorld module!</p>", r);
ap_rputs("</body></html>", r);
return OK;
}
static void helloworld_hooks(apr_pool_t *pool) {
ap_hook_handler(helloworld_handler, NULL, NULL, APR_HOOK_MIDDLE);
}
module AP_MODULE_DECLARE_DATA helloworld_module = {
STANDARD20_MODULE_STUFF,
NULL,
NULL,
NULL,
NULL,
NULL,
helloworld_hooks
};

# apxs -c mod_helloworld.c
# apxs -i mod_helloworld.la
httpd.conf:
LoadModule helloworld_module modules/mod_helloworld.so
<Location /helloworld>
SetHandler helloworld
</Location>

static ngx_int_t
ngx_http_hello_handler(ngx_http_request_t *r)
{
ngx_int_t rc;
ngx_buf_t *b;
ngx_chain_t out;
/* we response to 'GET' and 'HEAD' requests only */
if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD))) {
return NGX_HTTP_NOT_ALLOWED;
}
/* discard request body, since we don't need it here */
rc = ngx_http_discard_request_body(r);
if (rc != NGX_OK) {
return rc;
}
/* set the 'Content-type' header */
r->headers_out.content_type_len = sizeof("text/html") - 1;
r->headers_out.content_type.len = sizeof("text/html") - 1;
r->headers_out.content_type.data = (u_char *) "text/html";
/* send the header only, if the request type is http 'HEAD' */
if (r->method == NGX_HTTP_HEAD) {
r->headers_out.status = NGX_HTTP_OK;
r->headers_out.content_length_n = sizeof(ngx_hello_string) - 1;
return ngx_http_send_header(r);
}
/* allocate a buffer for your response body */
b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
if (b == NULL) {
return NGX_HTTP_INTERNAL_SERVER_ERROR;
}
/* attach this buffer to the buffer chain */
out.buf = b;
out.next = NULL;
/* adjust the pointers of the buffer */
b->pos = ngx_hello_string;
b->last = ngx_hello_string + sizeof(ngx_hello_string) - 1;
b->memory = 1; /* this buffer is in memory */
b->last_buf = 1; /* this is the last buffer in the buffer chain */
/* set the status line */
r->headers_out.status = NGX_HTTP_OK;
r->headers_out.content_length_n = sizeof(ngx_hello_string) - 1;
/* send the headers of your response */
rc = ngx_http_send_header(r);
if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
return rc;
}
/* send the buffer chain of your response */
return ngx_http_output_filter(r, &out);
}

config:
ngx_addon_name=ngx_http_hello_module
HTTP_MODULES="$HTTP_MODULES ngx_http_hello_module"
NGX_ADDON_SRCS="$NGX_ADDON_SRCS $ngx_addon_dir/ngx_http_hello_module.c"
./configure –add-module=./hello/ & make && make install
nginx.conf:
location / {
hello;
}

nginx.conf:
location /lua_content {
content_by_lua "ngx.say('Hello,world!')";
}

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Highload осень 2012 лекция 1

Highload осень 2012 лекция 1

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