Load balancer (y\u00fck dengeleyici), bir siteye gelen istekleri \u00f6nceden tan\u0131ml\u0131 bir kurala g\u00f6re birden fazla sunucu aras\u0131nda da\u011f\u0131tan katmand\u0131r. T\u00fcrk\u00e7ede “y\u00fck dengeleyici” ad\u0131yla an\u0131l\u0131r; iki ifade ayn\u0131 bile\u015feni tan\u0131mlar.<\/p>\n\n\n\n
\u0130htiyac\u0131n kayna\u011f\u0131 tektir: tek sunucu \u00fczerinde \u00e7al\u0131\u015fan bir site i\u00e7in o sunucu tek ar\u0131za noktas\u0131d\u0131r. Sunucu kapand\u0131\u011f\u0131nda, bak\u0131ma al\u0131nd\u0131\u011f\u0131nda ya da e\u015fzamanl\u0131 istek say\u0131s\u0131na yeti\u015femedi\u011finde site eri\u015filemez hale gelir. Y\u00fck dengeleyici, ayn\u0131 i\u00e7eri\u011fi sunan birden fazla sunucuyu tek havuzda toplar ve iste\u011fi bu havuzun uygun \u00fcyesine iletir.<\/p>\n\n\n\n
Ziyaret\u00e7i bu yap\u0131y\u0131 g\u00f6rmez. \u0130stemci tek bir sanal IP adresine ba\u011flan\u0131r; iste\u011fi hangi sunucunun kar\u015f\u0131layaca\u011f\u0131na y\u00fck dengeleyici karar verir. Bu karar\u0131 d\u00f6rt temel y\u00f6ntemden biriyle verir: round robin, least connection, IP hash ve weighted. Y\u00fck dengeleyici yaln\u0131zca da\u011f\u0131tmaz; havuzdaki sunucular\u0131 d\u00fczenli aral\u0131klarla denetler ve yan\u0131t vermeyeni da\u011f\u0131t\u0131m\u0131n d\u0131\u015f\u0131na \u00e7\u0131kar\u0131r.<\/p>\n\n\n\n
A\u015fa\u011f\u0131da y\u00fck dengeleyicinin ne i\u015fe yarad\u0131\u011f\u0131n\u0131, iste\u011fi hangi ad\u0131mlardan ge\u00e7irdi\u011fini, d\u00f6rt y\u00f6ntemin hangi ko\u015fulda se\u00e7ildi\u011fini ve ayn\u0131 i\u015fin yaz\u0131l\u0131m, donan\u0131m, bulut ve konteyner ortamlar\u0131ndaki kar\u015f\u0131l\u0131\u011f\u0131n\u0131 a\u00e7\u0131kl\u0131yoruz.<\/p>\n\n\n\n