{"id":18381,"date":"2025-04-17T07:30:14","date_gmt":"2025-04-17T04:30:14","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/sistem-tasariminda-cap-teoremini-anlamak\/"},"modified":"2025-04-17T07:30:14","modified_gmt":"2025-04-17T04:30:14","slug":"sistem-tasariminda-cap-teoremini-anlamak","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/sistem-tasariminda-cap-teoremini-anlamak\/","title":{"rendered":"Sistem Tasar\u0131m\u0131nda CAP Teoremini Anlamak"},"content":{"rendered":"<p><body><\/p>\n<p>Sistem Tasar\u0131m\u0131nda CAP Teoremini Anlamak<\/p>\n<p>Da\u011f\u0131t\u0131k sistemler tasar\u0131m\u0131 karma\u015f\u0131k bir s\u00fcre\u00e7tir.  Bu sistemlerin ba\u015far\u0131s\u0131, verinin tutarl\u0131l\u0131\u011f\u0131n\u0131, sistemin eri\u015filebilirli\u011fini ve sistemin b\u00f6l\u00fcnmelere kar\u015f\u0131 direncini (tolerans\u0131) sa\u011flama yetene\u011fine ba\u011fl\u0131d\u0131r.  \u0130\u015fte burada, Eric Brewer taraf\u0131ndan ortaya at\u0131lan ve da\u011f\u0131t\u0131k veri tabanlar\u0131 d\u00fcnyas\u0131nda temel bir prensip haline gelen CAP teoremi devreye giriyor.  <strong>CAP teoremi<\/strong>, bu \u00fc\u00e7 \u00f6zelli\u011fin herhangi bir da\u011f\u0131t\u0131k sistemde ayn\u0131 anda tamamen sa\u011flanamayaca\u011f\u0131n\u0131 belirtir.  Ba\u015fka bir deyi\u015fle, \u00fc\u00e7\u00fcnden sadece ikisini se\u00e7ebilirsiniz.<\/p>\n<h2>CAP Teoreminin Bile\u015fenleri<\/h2>\n<p>CAP teoremini anlamak i\u00e7in \u00f6ncelikle \u00fc\u00e7 temel bile\u015feni ayr\u0131 ayr\u0131 incelememiz gerekir:<\/p>\n<ul>\n<li><strong>Tutarl\u0131l\u0131k (Consistency):<\/strong>  T\u00fcm d\u00fc\u011f\u00fcmlerdeki verilerin ayn\u0131 anda ayn\u0131 de\u011fere sahip olmas\u0131 anlam\u0131na gelir.  Bir yazma i\u015flemi ger\u00e7ekle\u015fti\u011finde, t\u00fcm d\u00fc\u011f\u00fcmlerde ayn\u0131 veriyi g\u00f6rmemizi sa\u011flar.  Bu, g\u00fc\u00e7l\u00fc tutarl\u0131l\u0131k veya zay\u0131f tutarl\u0131l\u0131k olarak s\u0131n\u0131fland\u0131r\u0131labilir. G\u00fc\u00e7l\u00fc tutarl\u0131l\u0131kta, bir yazma i\u015fleminin tamamlanmas\u0131 t\u00fcm d\u00fc\u011f\u00fcmlerde hemen g\u00f6r\u00fcn\u00fcr olurken, zay\u0131f tutarl\u0131l\u0131kta gecikme olabilir.<\/li>\n<li><strong>Eri\u015filebilirlik (Availability):<\/strong> Herhangi bir istek her zaman ba\u015far\u0131l\u0131 bir yan\u0131t alaca\u011f\u0131 anlam\u0131na gelir.  Sistemin her zaman \u00e7al\u0131\u015f\u0131r durumda olmas\u0131 ve istekleri i\u015fleyebilmesi gerekir.  B\u00f6l\u00fcnmeler veya di\u011fer sorunlar olsa bile, sistem eri\u015filebilir olmal\u0131d\u0131r.<\/li>\n<li><strong>B\u00f6l\u00fcnme Tolerans\u0131 (Partition Tolerance):<\/strong> A\u011fda bir b\u00f6l\u00fcnme ya\u015fansa bile sistemin \u00e7al\u0131\u015fmaya devam edebilme yetene\u011fidir.  B\u00f6l\u00fcnme, a\u011f\u0131n farkl\u0131 b\u00f6l\u00fcmlerinin birbirleriyle ileti\u015fim kuramamas\u0131 anlam\u0131na gelir. Bu durumun sistemin \u00e7al\u0131\u015fmas\u0131n\u0131 engellememesi \u00f6nemlidir.<\/li>\n<\/ul>\n<p>Bu \u00fc\u00e7 \u00f6zellik aras\u0131nda bir se\u00e7im yapmak zorunda kalman\u0131n sebebi, b\u00f6l\u00fcnmelerin ger\u00e7ek hayatta yayg\u0131n olmas\u0131d\u0131r.  A\u011f sorunlar\u0131, donan\u0131m ar\u0131zalar\u0131 veya ba\u015fka beklenmedik durumlar, a\u011f\u0131n farkl\u0131 b\u00f6l\u00fcmlerinin birbirleriyle ileti\u015fimini kesebilir.  Bu durumlarda, tutarl\u0131l\u0131\u011f\u0131 ve eri\u015filebilirli\u011fi ayn\u0131 anda sa\u011flamak neredeyse imkans\u0131zd\u0131r.  Dolay\u0131s\u0131yla,  b\u00f6l\u00fcnme tolerans\u0131n\u0131 sa\u011flamak i\u00e7in ya tutarl\u0131l\u0131ktan ya da eri\u015filebilirlikten \u00f6d\u00fcn vermek gerekebilir.<\/p>\n<h2>CAP Teoreminin Uygulamalar\u0131<\/h2>\n<p>CAP teoreminin pratik uygulamalar\u0131, sistem tasar\u0131m\u0131nda hangi \u00f6zelliklere \u00f6ncelik verilece\u011fine karar vermeyi gerektirir. \u00d6rne\u011fin:<\/p>\n<ul>\n<li><strong>CA (Tutarl\u0131l\u0131k ve Eri\u015filebilirlik):<\/strong> B\u00f6l\u00fcnmelere tolerans g\u00f6stermeyen ancak tutarl\u0131l\u0131k ve eri\u015filebilirli\u011fe \u00f6ncelik veren bir sistem i\u00e7in uygun bir se\u00e7imdir. K\u00fc\u00e7\u00fck \u00f6l\u00e7ekli uygulamalar i\u00e7in ideal olabilir ancak \u00f6l\u00e7eklenebilirlik sorunlar\u0131 ya\u015fayabilir.<\/li>\n<li><strong>CP (Tutarl\u0131l\u0131k ve B\u00f6l\u00fcnme Tolerans\u0131):<\/strong>  B\u00f6l\u00fcnmelere kar\u015f\u0131 diren\u00e7li ve tutarl\u0131l\u0131\u011f\u0131 garanti eden bir sistem i\u00e7in uygundur.  Eri\u015filebilirlik baz\u0131 durumlarda s\u0131n\u0131rl\u0131 olabilir, \u00e7\u00fcnk\u00fc b\u00f6l\u00fcnmeler s\u0131ras\u0131nda baz\u0131 istekler reddedilebilir.  \u00d6nemli veri b\u00fct\u00fcnl\u00fc\u011f\u00fcn\u00fcn gerekti\u011fi uygulamalar i\u00e7in tercih edilebilir.<\/li>\n<li><strong>AP (Eri\u015filebilirlik ve B\u00f6l\u00fcnme Tolerans\u0131):<\/strong>  B\u00f6l\u00fcnmelere kar\u015f\u0131 diren\u00e7li ve her zaman eri\u015filebilir olan bir sistem i\u00e7in uygundur. Tutarl\u0131l\u0131k baz\u0131 durumlarda zay\u0131f olabilir.  Y\u00fcksek eri\u015filebilirli\u011fin \u00f6nemli oldu\u011fu, \u00f6rne\u011fin sosyal medya platformlar\u0131 gibi, uygulamalar i\u00e7in uygundur.<\/li>\n<\/ul>\n<p>Sistem tasar\u0131mc\u0131lar\u0131, sistemin ihtiya\u00e7lar\u0131na ve \u00f6nceliklerine ba\u011fl\u0131 olarak bu \u00fc\u00e7 senaryo aras\u0131nda se\u00e7im yapmak zorundad\u0131r.  Hi\u00e7bir se\u00e7enek m\u00fckemmel de\u011fildir; her birinin avantajlar\u0131 ve dezavantajlar\u0131 vard\u0131r.  Dolay\u0131s\u0131yla, en uygun se\u00e7ene\u011fin dikkatlice belirlenmesi gerekir.<\/p>\n<h2>Sonu\u00e7<\/h2>\n<p>CAP teoremi, da\u011f\u0131t\u0131k sistem tasar\u0131m\u0131nda temel bir kavramd\u0131r.  Bu teorem, tutarl\u0131l\u0131k, eri\u015filebilirlik ve b\u00f6l\u00fcnme tolerans\u0131 aras\u0131nda yap\u0131lmas\u0131 gereken zorunlu se\u00e7imi vurgular.  Sistem tasar\u0131mc\u0131lar\u0131, sistemlerinin gereksinimlerini dikkatlice de\u011ferlendirmeli ve  hangi \u00f6zelliklere \u00f6ncelik vereceklerini buna g\u00f6re belirlemelidir. Bu se\u00e7im, sistemin performans\u0131n\u0131 ve g\u00fcvenilirli\u011fini do\u011frudan etkiler.  Sisteminizin ihtiya\u00e7lar\u0131n\u0131 anlamak ve do\u011fru se\u00e7imi yapmak, ba\u015far\u0131l\u0131 bir da\u011f\u0131t\u0131k sistem tasar\u0131m\u0131 i\u00e7in kritik \u00f6neme sahiptir.<\/p>\n<p>Daha fazla bilgi i\u00e7in <a href=\"https:\/\/fatihsoysal.com\">fatihsoysal.com<\/a>  sitesini ziyaret edebilirsiniz.  Ayr\u0131ca, bu konuda daha detayl\u0131 bilgi edinmek i\u00e7in <a href=\"https:\/\/dev.to\/msnmongare\/understanding-the-cap-theorem-in-system-design-of9\">bu kaynak<\/a>  faydal\u0131 olabilir.<\/p>\n<h3>#Etiketler<\/h3>\n<p>CAP Teoremi, Da\u011f\u0131t\u0131k Sistemler, Veri Tabanlar\u0131, Tutarl\u0131l\u0131k, Eri\u015filebilirlik, B\u00f6l\u00fcnme Tolerans\u0131, Sistem Tasar\u0131m\u0131, Y\u00fcksek Eri\u015filebilirlik, Veritaban\u0131 Se\u00e7imi, Da\u011f\u0131t\u0131k Veri Taban\u0131,  Yaz\u0131l\u0131m Mimarisi<\/p>\n<p><\/body><br \/>\n<\/html><\/p>\n","protected":false},"excerpt":{"rendered":"Sistem Tasar\u0131m\u0131nda CAP Teoremini Anlamak Da\u011f\u0131t\u0131k sistemler tasar\u0131m\u0131 karma\u015f\u0131k bir s\u00fcre\u00e7tir. Bu sistemlerin ba\u015far\u0131s\u0131, verinin tutarl\u0131l\u0131\u011f\u0131n\u0131, sistemin eri\u015filebilirli\u011fini&hellip;","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-18381","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-genel","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.5 (Yoast SEO v25.3.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Sistem Tasar\u0131m\u0131nda CAP Teoremini Anlamak<\/title>\n<meta name=\"description\" content=\"Da\u011f\u0131t\u0131k sistemler tasar\u0131m\u0131 karma\u015f\u0131k bir s\u00fcre\u00e7tir. 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