{"id":15065,"date":"2025-03-13T15:30:15","date_gmt":"2025-03-13T12:30:15","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/dagitik-sistemlerde-cap-teoremi-savaslarinizi-secmek\/"},"modified":"2025-03-13T15:30:15","modified_gmt":"2025-03-13T12:30:15","slug":"dagitik-sistemlerde-cap-teoremi-savaslarinizi-secmek","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/dagitik-sistemlerde-cap-teoremi-savaslarinizi-secmek\/","title":{"rendered":"Da\u011f\u0131t\u0131k Sistemlerde CAP Teoremi: Sava\u015flar\u0131n\u0131z\u0131 Se\u00e7mek"},"content":{"rendered":"<p><body><\/p>\n<p>Da\u011f\u0131t\u0131k Sistemlerde CAP Teoremi: Sava\u015flar\u0131n\u0131z\u0131 Se\u00e7mek<\/p>\n<p>Da\u011f\u0131t\u0131k sistemler, modern uygulamalar\u0131n temel ta\u015flar\u0131ndan biridir.  Ancak bu sistemleri tasarlarken ve y\u00f6net\u0131rken kar\u015f\u0131la\u015f\u0131lan en \u00f6nemli kavramlardan biri de CAP teoremidir.  Bu teorem, bir da\u011f\u0131t\u0131k sistemde \u00fc\u00e7 temel \u00f6zelli\u011fin \u2013 <strong>tutarl\u0131l\u0131k (Consistency)<\/strong>, <strong>kullan\u0131labilirlik (Availability)<\/strong> ve <strong>dayan\u0131kl\u0131l\u0131k (Partition tolerance)<\/strong> \u2013 ayn\u0131 anda tam olarak sa\u011flanamayaca\u011f\u0131n\u0131 belirtir.  Ba\u015fka bir deyi\u015fle, bu \u00fc\u00e7 \u00f6zelli\u011fin her zaman \u00fc\u00e7\u00fcn\u00fc birden elde edemezsiniz; bir tanesinden taviz vermeniz gerekir. Bu yaz\u0131da,  CAP teoremini detayl\u0131 olarak inceleyecek, her bir \u00f6zelli\u011fi a\u00e7\u0131klayacak ve  hangi senaryolarda hangi \u00f6zelli\u011fin \u00f6nceliklendirilmesi gerekti\u011fini ele alaca\u011f\u0131z.<\/p>\n<h2>CAP Teoreminin Bile\u015fenleri<\/h2>\n<p>\u00d6ncelikle, CAP teoreminin \u00fc\u00e7 temel \u00f6zelli\u011fini ayr\u0131nt\u0131l\u0131 olarak inceleyelim:<\/p>\n<h3>Tutarl\u0131l\u0131k (Consistency):<\/h3>\n<p>Tutarl\u0131l\u0131k, verinin t\u00fcm d\u00fc\u011f\u00fcmlerde ayn\u0131 anda ayn\u0131 oldu\u011funu garanti eder.  Bir yazma i\u015flemi yap\u0131ld\u0131\u011f\u0131nda, t\u00fcm okuma i\u015flemleri bu g\u00fcncellenmi\u015f veriyi hemen g\u00f6rmelidir.  Bu, g\u00fc\u00e7l\u00fc tutarl\u0131l\u0131k (strong consistency) anlam\u0131na gelir.  Zay\u0131f tutarl\u0131l\u0131k (weak consistency) ise, verinin t\u00fcm d\u00fc\u011f\u00fcmlere e\u015f zamanl\u0131 olarak yay\u0131lmas\u0131n\u0131n biraz zaman alabilece\u011fini kabul eder.  Ancak,  tutarl\u0131l\u0131\u011f\u0131n tam olarak sa\u011flanmas\u0131, performans a\u00e7\u0131s\u0131ndan \u00f6nemli \u00f6l\u00e7\u00fcde maliyet getirebilir.  Bu durum, \u00f6zellikle y\u00fcksek \u00f6l\u00e7ekli da\u011f\u0131t\u0131k sistemlerde performans sorunlar\u0131na yol a\u00e7abilir.<\/p>\n<h3>Kullan\u0131labilirlik (Availability):<\/h3>\n<p>Kullan\u0131labilirlik, sistemin her zaman \u00e7al\u0131\u015f\u0131r durumda ve isteklere yan\u0131t verebilir durumda olmas\u0131 anlam\u0131na gelir.  Her istek, bir yan\u0131t almal\u0131d\u0131r \u2013 hata veya gecikme olmadan.  Kullan\u0131labilirlik, \u00f6zellikle e-ticaret veya online oyunlar gibi kesintiye tahamm\u00fcls\u00fcz sistemler i\u00e7in kritik \u00f6neme sahiptir.  Ancak,  y\u00fcksek kullan\u0131labilirlik sa\u011flamak i\u00e7in genellikle sistemin replikasyonuna ve hata tolerans\u0131na ihtiya\u00e7 duyulur, bu da karma\u015f\u0131kl\u0131\u011f\u0131 ve maliyetleri art\u0131rabilir.<\/p>\n<h3>Dayan\u0131kl\u0131l\u0131k (Partition tolerance):<\/h3>\n<p>Dayan\u0131kl\u0131l\u0131k, a\u011f ba\u011flant\u0131s\u0131 kesintisi veya d\u00fc\u011f\u00fcm ar\u0131zas\u0131 gibi durumlar kar\u015f\u0131s\u0131nda sistemin \u00e7al\u0131\u015fmaya devam edebilme \u00f6zelli\u011fidir.  Da\u011f\u0131t\u0131k bir sistemin temel gereksinimlerinden biridir.  Bu \u00f6zellik, genellikle verinin farkl\u0131 d\u00fc\u011f\u00fcmlerde \u00e7o\u011falt\u0131lmas\u0131 (replikasyon) ile sa\u011flan\u0131r.  Ancak, replikasyonun y\u00f6netimi ve tutarl\u0131l\u0131\u011f\u0131n korunmas\u0131, belirli zorluklar sunar.<\/p>\n<h2>CAP Teoremini Anlamak: Bir \u00d6rnek<\/h2>\n<p>\u015eimdi, CAP teoremini daha iyi anlamak i\u00e7in basit bir \u00f6rnek verelim.  Bir online ma\u011faza d\u00fc\u015f\u00fcn\u00fcn.  Bir m\u00fc\u015fteri, \u00fcr\u00fcn sepetine bir \u00fcr\u00fcn ekledi\u011finde, bu bilginin t\u00fcm veritaban\u0131 sunucular\u0131na e\u015f zamanl\u0131 olarak yaz\u0131lmas\u0131 gerekir.  E\u011fer a\u011f ba\u011flant\u0131s\u0131nda bir kopma ya\u015fan\u0131rsa (b\u00f6l\u00fcnme \u2013 partition), tutarl\u0131l\u0131\u011f\u0131 sa\u011flamak i\u00e7in bir sunucuya yaz\u0131lan verinin di\u011fer sunuculara ula\u015fmas\u0131 gecikebilir ya da hi\u00e7 ula\u015fmayabilir.  Bu durumda, ya tutarl\u0131l\u0131ktan (kullan\u0131c\u0131ya yanl\u0131\u015f stok bilgisi g\u00f6sterilmesi) ya da kullan\u0131labilirlikten (sistemin ge\u00e7ici olarak \u00e7\u00f6kmesi) taviz vermeniz gerekir.  Dayan\u0131kl\u0131l\u0131k ise, bu senaryoda zaten varolan bir gerekliliktir.<\/p>\n<h2>Sava\u015flar\u0131n\u0131z\u0131 Se\u00e7mek: Hangi \u00d6zelli\u011fi \u00d6nceliklendireceksiniz?<\/h2>\n<p>Hangi \u00f6zelli\u011fin \u00f6nceliklendirilmesi gerekti\u011fi, uygulaman\u0131z\u0131n \u00f6zelliklerine ve gereksinimlerine ba\u011fl\u0131d\u0131r.  \u00d6rne\u011fin, finansal i\u015flemler gibi kritik i\u015flemler i\u00e7in tutarl\u0131l\u0131k en \u00f6nemli fakt\u00f6r olabilir.  E-ticaret siteleri ise genellikle y\u00fcksek kullan\u0131labilirli\u011fe odaklan\u0131r.  \u00c7o\u011fu uygulama i\u00e7in, dayan\u0131kl\u0131l\u0131k vazge\u00e7ilmez bir gerekliliktir.  Bu nedenle, uygulaman\u0131z\u0131n gereksinimlerini dikkatlice de\u011ferlendirmeniz ve hangi \u00f6zelli\u011fin en \u00f6nemli oldu\u011funu belirlemeniz gerekir.  \u00d6rne\u011fin, baz\u0131 uygulamalar, zay\u0131f tutarl\u0131l\u0131\u011f\u0131 kabul ederek hem y\u00fcksek kullan\u0131labilirli\u011fi hem de dayan\u0131kl\u0131l\u0131\u011f\u0131 sa\u011flayabilirler. Bu se\u00e7im, dikkatlice de\u011ferlendirilmelidir.  Yanl\u0131\u015f se\u00e7im, sisteminizin ba\u015far\u0131s\u0131zl\u0131\u011f\u0131n\u0131 do\u011frudan etkileyebilir.<\/p>\n<h2>Sonu\u00e7<\/h2>\n<p>CAP teoremi, da\u011f\u0131t\u0131k sistemlerin tasar\u0131m\u0131nda ve y\u00f6netiminde \u00f6nemli bir kavramd\u0131r.  Bu teorem, her \u00fc\u00e7 \u00f6zelli\u011fin ayn\u0131 anda tam olarak sa\u011flanamayaca\u011f\u0131n\u0131 vurgular.  Bu nedenle, uygulaman\u0131z\u0131n gereksinimlerine g\u00f6re hangi \u00f6zelli\u011fin \u00f6nceliklendirilmesi gerekti\u011fini dikkatlice belirlemeniz gerekir.  Do\u011fru karar, sisteminizin g\u00fcvenilirli\u011fi, performans\u0131 ve \u00f6l\u00e7eklenebilirli\u011fi i\u00e7in b\u00fcy\u00fck \u00f6nem ta\u015f\u0131r.  Daha detayl\u0131 bilgi i\u00e7in <a href=\"https:\/\/fatihsoysal.com\">fatihsoysal.com<\/a> adresini ziyaret edebilirsiniz.<\/p>\n<p>Ayr\u0131ca, da\u011f\u0131t\u0131k sistemler hakk\u0131nda daha fazla bilgi edinmek i\u00e7in a\u015fa\u011f\u0131daki kaynaklara g\u00f6z atabilirsiniz:<\/p>\n<ul>\n<li><a href=\"https:\/\/en.wikipedia.org\/wiki\/CAP_theorem\">Wikipedia &#8211; CAP Theorem<\/a><\/li>\n<li><a href=\"#\">Di\u011fer Faydal\u0131 Kaynaklar (Eklenecek)<\/a><\/li>\n<\/ul>\n<p>#Etiketler: CAP Teoremi, Da\u011f\u0131t\u0131k Sistemler, Tutarl\u0131l\u0131k, Kullan\u0131labilirlik, Dayan\u0131kl\u0131l\u0131k, Veritaban\u0131, Mimari, Bulut, Fatih Soysal, Performans, \u00d6l\u00e7eklenebilirlik, G\u00fcvenilirlik<br \/>\n<\/body><br \/>\n<\/html><\/p>\n","protected":false},"excerpt":{"rendered":"Da\u011f\u0131t\u0131k Sistemlerde CAP Teoremi: Sava\u015flar\u0131n\u0131z\u0131 Se\u00e7mek Da\u011f\u0131t\u0131k sistemler, modern uygulamalar\u0131n temel ta\u015flar\u0131ndan biridir. Ancak bu sistemleri tasarlarken ve&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-15065","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>Da\u011f\u0131t\u0131k Sistemlerde CAP Teoremi: Sava\u015flar\u0131n\u0131z\u0131 Se\u00e7mek<\/title>\n<meta name=\"description\" content=\"Da\u011f\u0131t\u0131k sistemler, modern uygulamalar\u0131n temel ta\u015flar\u0131ndan biridir. Ancak bu sistemleri tasarlarken ve y\u00f6net\u0131rken kar\u015f\u0131la\u015f\u0131lan en \u00f6nemli kavramlardan biri de CAP teoremidir. Bu teorem, bir da\u011f\u0131t\u0131k sistemde \u00fc\u00e7 temel \u00f6zelli\u011fin \u2013 tutarl\u0131l\u0131k (Consistency), kullan\u0131labilirlik (Availability) ve dayan\u0131kl\u0131l\u0131k (Partition tolerance) \u2013 ayn\u0131 anda tam olarak sa\u011flanamayaca\u011f\u0131n\u0131 belirtir. Ba\u015fka bir deyi\u015fle, bu \u00fc\u00e7 \u00f6zelli\u011fin her zaman \u00fc\u00e7\u00fcn\u00fc birden elde edemezsiniz; bir tanesinden taviz vermeniz gerekir. Bu yaz\u0131da, CAP teoremini detayl\u0131 olarak inceleyecek, her bir \u00f6zelli\u011fi a\u00e7\u0131klayacak ve hangi senaryolarda hangi \u00f6zelli\u011fin \u00f6nceliklendirilmesi gerekti\u011fini ele alaca\u011f\u0131z.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fatihsoysal.com\/blog\/dagitik-sistemlerde-cap-teoremi-savaslarinizi-secmek\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Da\u011f\u0131t\u0131k Sistemlerde CAP Teoremi: Sava\u015flar\u0131n\u0131z\u0131 Se\u00e7mek\" \/>\n<meta property=\"og:description\" content=\"Da\u011f\u0131t\u0131k sistemler, modern uygulamalar\u0131n temel ta\u015flar\u0131ndan biridir. Ancak bu sistemleri tasarlarken ve y\u00f6net\u0131rken kar\u015f\u0131la\u015f\u0131lan en \u00f6nemli kavramlardan biri de CAP teoremidir. Bu teorem, bir da\u011f\u0131t\u0131k sistemde \u00fc\u00e7 temel \u00f6zelli\u011fin \u2013 tutarl\u0131l\u0131k (Consistency), kullan\u0131labilirlik (Availability) ve dayan\u0131kl\u0131l\u0131k (Partition tolerance) \u2013 ayn\u0131 anda tam olarak sa\u011flanamayaca\u011f\u0131n\u0131 belirtir. Ba\u015fka bir deyi\u015fle, bu \u00fc\u00e7 \u00f6zelli\u011fin her zaman \u00fc\u00e7\u00fcn\u00fc birden elde edemezsiniz; bir tanesinden taviz vermeniz gerekir. Bu yaz\u0131da, CAP teoremini detayl\u0131 olarak inceleyecek, her bir \u00f6zelli\u011fi a\u00e7\u0131klayacak ve hangi senaryolarda hangi \u00f6zelli\u011fin \u00f6nceliklendirilmesi gerekti\u011fini ele alaca\u011f\u0131z.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/fatihsoysal.com\/blog\/dagitik-sistemlerde-cap-teoremi-savaslarinizi-secmek\/\" \/>\n<meta property=\"og:site_name\" content=\"Kodlar\u0131n Gizemli D\u00fcnyas\u0131\" \/>\n<meta property=\"article:published_time\" content=\"2025-03-13T12:30:15+00:00\" \/>\n<meta name=\"author\" content=\"Fatih Soysal\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Yazan:\" \/>\n\t<meta name=\"twitter:data1\" content=\"Fatih Soysal\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tahmini okuma s\u00fcresi\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 dakika\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/dagitik-sistemlerde-cap-teoremi-savaslarinizi-secmek\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/dagitik-sistemlerde-cap-teoremi-savaslarinizi-secmek\/\"},\"author\":{\"name\":\"Fatih Soysal\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"headline\":\"Da\u011f\u0131t\u0131k Sistemlerde CAP Teoremi: Sava\u015flar\u0131n\u0131z\u0131 Se\u00e7mek\",\"datePublished\":\"2025-03-13T12:30:15+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/dagitik-sistemlerde-cap-teoremi-savaslarinizi-secmek\/\"},\"wordCount\":784,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#\/schema\/person\/002a254750921dcfd568a99e48240dd1\"},\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/fatihsoysal.com\/blog\/dagitik-sistemlerde-cap-teoremi-savaslarinizi-secmek\/#respond\"]}],\"copyrightYear\":\"2025\",\"copyrightHolder\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/fatihsoysal.com\/blog\/dagitik-sistemlerde-cap-teoremi-savaslarinizi-secmek\/\",\"url\":\"https:\/\/fatihsoysal.com\/blog\/dagitik-sistemlerde-cap-teoremi-savaslarinizi-secmek\/\",\"name\":\"Da\u011f\u0131t\u0131k Sistemlerde CAP Teoremi: Sava\u015flar\u0131n\u0131z\u0131 Se\u00e7mek\",\"isPartOf\":{\"@id\":\"https:\/\/fatihsoysal.com\/blog\/#website\"},\"datePublished\":\"2025-03-13T12:30:15+00:00\",\"description\":\"Da\u011f\u0131t\u0131k sistemler, modern uygulamalar\u0131n temel ta\u015flar\u0131ndan biridir. 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