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* added the 'weight' parameter to the servers, limited to 1..256. 

It is factored between all the servers so that the servers map
  will be smaller and easier to construct.
This commit is contained in:
willy tarreau 2006-04-08 21:52:24 +02:00
parent b1c331fd8d
commit 3b002c7a79
1 changed files with 34 additions and 4 deletions
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38
haproxy.c
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@ -513,6 +513,8 @@ struct server {
int curfd; /* file desc used for current test, or -1 if not in test */
int cur_sess; /* number of currently active sessions (including syn_sent) */
unsigned int cum_sess; /* cumulated number of sessions really sent to this server */
unsigned char uweight, eweight; /* user-specified weight-1, and effective weight-1 */
unsigned short wsquare; /* eweight*eweight, to speed up map computation */
struct proxy *proxy; /* the proxy this server belongs to */
};
@ -7090,6 +7092,17 @@ int cfg_parse_listen(char *file, int linenum, char **args) {
newsrv->state |= SRV_BACKUP;
cur_arg ++;
}
else if (!strcmp(args[cur_arg], "weight")) {
int w;
w = atol(args[cur_arg + 1]);
if (w < 1 || w > 256) {
Alert("parsing [%s:%d] : weight of server %s is not within 1 and 256 (%d).\n",
file, linenum, newsrv->id, w);
return -1;
}
newsrv->uweight = w - 1;
cur_arg += 2;
}
else if (!strcmp(args[cur_arg], "check")) {
global.maxsock++;
do_check = 1;
@ -7106,7 +7119,7 @@ int cfg_parse_listen(char *file, int linenum, char **args) {
cur_arg += 2;
}
else {
Alert("parsing [%s:%d] : server %s only supports options 'backup', 'cookie', 'check', 'inter', 'rise', 'fall', 'port' and 'source'.\n",
Alert("parsing [%s:%d] : server %s only supports options 'backup', 'cookie', 'check', 'inter', 'rise', 'fall', 'port', 'source', and 'weight'.\n",
file, linenum, newsrv->id);
return -1;
}
@ -7888,9 +7901,26 @@ int readcfgfile(char *file) {
cfgerr++;
}
else {
while (newsrv != NULL) {
/* nothing to check for now */
newsrv = newsrv->next;
struct server *srv;
int pgcd;
if (newsrv) {
/* We will factor the weights to reduce the table,
* using Euclide's largest common divisor algorithm
*/
pgcd = newsrv->uweight + 1;
for (srv = newsrv->next; srv && pgcd > 1; srv = srv->next) {
int t, w;
w = srv->uweight + 1;
while (w) {
t = pgcd % w;
pgcd = w;
w = t;
}
}
for (srv = newsrv; srv; srv = srv->next)
srv->eweight = ((srv->uweight + 1) / pgcd) - 1;
}
}
}