{"id":67,"date":"2021-01-14T14:31:04","date_gmt":"2021-01-14T14:31:04","guid":{"rendered":"https:\/\/codesupply.co\/?p=67"},"modified":"2024-01-20T11:05:13","modified_gmt":"2024-01-20T11:05:13","slug":"veri-replikasyonu-nedir","status":"publish","type":"post","link":"https:\/\/bulutistan.com\/blog\/veri-replikasyonu-nedir\/","title":{"rendered":"Veri Replikasyonu Nedir?"},"content":{"rendered":"\r\n

Veri Replikasyonu, i\u015flem s\u0131ras\u0131nda ortamda biriken verilerin birden fazla konumda tutundurma i\u015flemine verilen T\u00fcrk\u00e7e add\u0131r. T\u00fcm kullan\u0131c\u0131lar i\u00e7in, yap\u0131lan i\u015flemler ad\u0131na herhangi bir tutars\u0131zl\u0131k veya sapma gibi bir durum olu\u015fmadan veritaban\u0131nda biriken verileri kaynaklardan al\u0131p, di\u011fer birden farkl\u0131 kaynaklara ta\u015f\u0131ma olay\u0131d\u0131r. Da\u011f\u0131t\u0131lm\u0131\u015f veri taban\u0131 olarak olu\u015fturulan bu sistemde, veriler ki\u015finin iste\u011fine g\u00f6re hareket eder ve iki farkl\u0131 kullan\u0131c\u0131 birbirlerinin \u00e7al\u0131\u015fmalar\u0131na m\u00fcdahale etmeden g\u00f6revlerini yerine getirebilirler. K\u0131sacas\u0131 veri replikasyonu, internet ortam\u0131nda bir kar\u0131\u015f\u0131kl\u0131k olu\u015fmadan verilerin rahat\u00e7a hareket edebilmesidir.<\/p>\r\n\r\n\r\n\r\n

Bu i\u015flemler s\u0131ras\u0131nda t\u00fcm biriken veriler replike edilebilir. Veri Replikasyonu, yap\u0131lan i\u015flemlerin \u00e7o\u011falmas\u0131n\u0131n fark\u0131na vararak saptar. B\u00f6ylece \u00e7o\u011falan veriler d\u00fczg\u00fcn bir \u015fekilde g\u00fcncelleme al\u0131r ve senkronize i\u015flemi kusursuz \u015fekilde tamamlan\u0131r.<\/p>\r\n\r\n\r\n\r\n

<\/p>\r\n\r\n\r\n\r\n

Replication Nedir?<\/h2>\r\n\r\n\r\n\r\n

Replication, sunucu\u2013istemci mimarisine sahip olan t\u00fcm yap\u0131larda, aboneler ve sunucular aras\u0131nda h\u0131zl\u0131 ve d\u00fczenli bir \u015fekilde veritaban\u0131 nesnelerini e\u015fitleme imk\u00e2n\u0131 sunan bir y\u00f6nteme verilen add\u0131r.<\/p>\r\n\r\n\r\n\r\n

Bir replikasyon i\u015flemi i\u00e7in bir yay\u0131nc\u0131 (Publisher) veritaban\u0131 se\u00e7ilir. Bu yay\u0131nc\u0131 veritaban\u0131ndan yay\u0131nlanacak her t\u00fcrl\u00fc nesneler tamam\u0131 ile belirlenir. Daha sonra yap\u0131lacak i\u015flem, Publisher veritaban\u0131n\u0131n bilgilerini ve g\u00fcncellenen verileri tutmas\u0131 i\u00e7in yay\u0131nc\u0131 veritaban\u0131na aboneler olarak tan\u0131mlan\u0131r. Bu i\u015flem sayesinde sitemde ki kaynak veritaban\u0131, s\u00fcrekli g\u00fcncel halde h\u0131zl\u0131 bir \u015fekilde ba\u015fka bilgisayarda da yedeklenmi\u015f ve depolanm\u0131\u015f olur.<\/p>\r\n\r\n\r\n\r\n

Bili\u015fim sekt\u00f6r\u00fcnde kendine has farkl\u0131 kelimeler bulunmaktad\u0131r. Bili\u015fim terimlerinde Aboneler (Subscribers) olarak kayda ge\u00e7mi\u015ftir.<\/p>\r\n

Bulutistan hizmetlerinin detaylar\u0131na ula\u015fmak i\u00e7in<\/span> t\u0131klay\u0131n\u0131z<\/span><\/a>.<\/span><\/p>\r\n\r\n\r\n\r\n

Veri Replikasyonu T\u00fcrleri<\/h2>\r\n\r\n\r\n\r\n

Veri replikasyonlar\u0131 kendi i\u00e7inde birden farkl\u0131 t\u00fcre sahiptirler. Merge, Snapshot veTransactional olmak \u00fczere ayr\u0131 3 t\u00fcr\u00fc vard\u0131r;<\/p>\r\n\r\n\r\n\r\n

Merge Replikasyonu<\/h3>\r\n\r\n\r\n\r\n

Veri replikasyonu t\u00fcrleri aras\u0131nda belki de en karma\u015f\u0131k replikasyon t\u00fcr\u00fc olan merge replikasyonu, birden fazla veritaban\u0131nda birikmi\u015f olan verileri, bir arada toplay\u0131p tek bir veritaban\u0131nda birle\u015ftirmektedir. \u00c7o\u011funlukla sunucudan istemciye do\u011fru olan ortamlarda merge replikasyonu g\u00f6r\u00fclmektedir.<\/p>\r\n\r\n\r\n\r\n

Snapshot Replikasyonu<\/h3>\r\n\r\n\r\n\r\n

Bir di\u011fer replikasyon t\u00fcr\u00fc ise Snapshot. Verilerde birikmi\u015f olan g\u00fcncellemeleri takip etmeden belirli bir zaman aral\u0131\u011f\u0131nda g\u00f6r\u00fcnd\u00fc\u011f\u00fc gibi da\u011f\u0131tma i\u015flemi g\u00f6r\u00fcr. Kar\u015f\u0131m\u0131za \u00e7\u0131km\u0131\u015f olan g\u00f6r\u00fcnt\u00fcn\u00fcn bir b\u00fct\u00fcn\u00fcn\u00fc olu\u015fturur ve h\u0131zl\u0131ca kullan\u0131c\u0131lara aktar\u0131r. Di\u011fer bir replikasyon t\u00fcr\u00fc olan Transactional i\u015fleminden yava\u015f \u00e7al\u0131\u015fan Snapshot Replikasyonu, veri de\u011fi\u015fikli\u011finin di\u011fer durumlara g\u00f6re daha az g\u00f6r\u00fcld\u00fc\u011f\u00fc yerlerde kar\u015f\u0131la\u015f\u0131l\u0131r. Yava\u015f \u00e7al\u0131\u015fmas\u0131n\u0131n as\u0131l sebebi ise bir\u00e7ok farkl\u0131 kayd\u0131 bir u\u00e7tan di\u011fer uca ta\u015f\u0131maya \u00e7al\u0131\u015fmas\u0131ndan kaynaklan\u0131r.<\/p>\r\n\r\n\r\n\r\n

Transactional Replikasyonu<\/h3>\r\n\r\n\r\n\r\n

Son Veri Replikasyon t\u00fcr\u00fc iste Transactional. \u00c7al\u0131\u015fma prensibi genel olarak sunucudan sunucuya \u00e7al\u0131\u015fmakta olan replikasyon t\u00fcrlerinde, ilk ba\u015fta verilerin bulundu\u011fu veritaban\u0131n\u0131n tam bir kopyas\u0131 al\u0131nmaktad\u0131r. Devam eden s\u00fcre\u00e7te ise gerekli g\u00fcncellemeler yap\u0131lmaktad\u0131r. Veriler, ger\u00e7ek zamanl\u0131 olarak yay\u0131nc\u0131 ile al\u0131c\u0131 aras\u0131ndaki veritaban\u0131nda ayn\u0131 anda kopyalanmaktad\u0131r. Bu durumun getirdi\u011fi avantaj ise, yap\u0131lan i\u015flemler \u00e7o\u011falsa dahi i\u015flem tutarl\u0131l\u0131\u011f\u0131 tamamen garanti alt\u0131na al\u0131nm\u0131\u015f olur ve veri kayb\u0131 di\u011fer t\u00fcrlere nazaran hi\u00e7 g\u00f6r\u00fclmez. Transactional replikasyonun g\u00f6revi sadece veri kopyalamak de\u011fildir. Transactional Replikasyonu, ayn\u0131 zamanda yap\u0131lan her de\u011fi\u015fikli\u011fi do\u011fru ve tutarl\u0131 bir \u015fekilde \u00e7o\u011faltma i\u015flemi g\u00f6rerek veri kayb\u0131n\u0131 ortadan kald\u0131r\u0131r.<\/p>\r\n\r\n\r\n\r\n

Veri Replikasyonu Avantajlar\u0131<\/h2>\r\n\r\n\r\n\r\n
    \r\n
  • Veriler her zaman daha g\u00fcvenli ortamda saklan\u0131r.<\/li>\r\n
  • Veri sorgular\u0131nda en h\u0131zl\u0131 \u015fekilde d\u00f6n\u00fc\u015f al\u0131nmas\u0131na olanak sa\u011flar.<\/li>\r\n
  • Biriken t\u00fcm veritaban\u0131 i\u015flemlerini, karma\u015f\u0131kla\u015ft\u0131rmadan h\u0131zl\u0131 bir \u015fekilde tutarl\u0131 ve do\u011fru bir kopyas\u0131n\u0131 tutar.<\/li>\r\n
  • Verilerin di\u011fer zamanlara k\u0131yasla sorunsuz kullanabilirli\u011fini art\u0131rmaktad\u0131r.<\/li>\r\n
  • Sa\u011flam\u0131\u015f oldu\u011fu y\u00fcksek performans\u0131 sayesinde birden fazla kullan\u0131c\u0131n\u0131n ayn\u0131 anda kullan\u0131m\u0131na a\u00e7\u0131k hale gelir.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n

    Veri Replikasyonu Dezavantajlar\u0131<\/h2>\r\n\r\n\r\n\r\n
      \r\n
    • Avantajlar\u0131 gibi dezavantajlar\u0131 da mevcuttur. Bu i\u015flermler de veri tutarl\u0131l\u0131\u011f\u0131n\u0131 sa\u011flamak ad\u0131na, farkl\u0131 sitelerde ki karma\u015f\u0131kl\u0131\u011f\u0131n \u00f6n\u00fcne ge\u00e7mek i\u00e7in \u00f6ncesin de \u00f6nlem al\u0131nmas\u0131 gereklidir.<\/li>\r\n
    • Sistemde biriken veriler i\u00e7in birden fazla alanda ek depolama alanlar\u0131na ihtiya\u00e7 vard\u0131r.<\/li>\r\n
    • Farkl\u0131 sitelerde birikmi\u015f olan verilerin g\u00fcncellenebilmeleri i\u00e7in fazladan ek maliyet ihtiyac\u0131 do\u011fabilir.<\/li>\r\n<\/ul>\r\n\r\n\r\n\r\n

      Veri Replikasyonu Nerede Kullan\u0131l\u0131r?<\/h2>\r\n\r\n\r\n\r\n
        \r\n
      • Bankac\u0131l\u0131k i\u015flemleri, bilet rezervasyonu gibi merkez veritaban\u0131nda g\u00fcncellenen verilerin di\u011fer veritabanlar\u0131nda da e\u015f zamanl\u0131 yans\u0131mas\u0131 gerekti\u011finde veri replikasyonu kullan\u0131l\u0131r. Ayn\u0131 durumun tam tersi oldu\u011fu durumlarda da kullan\u0131labilir.<\/li>\r\n
      • Belli zaman aral\u0131klar\u0131 ile veritaban\u0131n\u0131z\u0131 ve yapt\u0131\u011f\u0131n\u0131z t\u00fcm de\u011fi\u015fiklikleri ba\u015fka bilgisayara aktarmak i\u00e7in de veri replikasyonlar\u0131ndan yararlanabilmek olduk\u00e7a m\u00fcmk\u00fcn.\u00a0 Ba\u015fka bir bilgisayara aktarmak istenen verilerin, yeni yedeklerini olu\u015fturabilmek i\u00e7in veri replikasyonu rahatl\u0131kla kullan\u0131labilir.<\/li>\r\n
      • Belli zaman aral\u0131klar\u0131nda, e\u015flenik (syncronization) ve e\u015f zamanl\u0131 (real-time) ad\u0131 alt\u0131nda veritaban\u0131n\u0131z\u0131 t\u00fcm\u00fcyle de\u011fi\u015fikliklerini ba\u015fka bir veritaban\u0131na g\u00f6ndererek,<\/li>\r\n
      • Productiondaki veritaban\u0131n performans ba\u015far\u0131s\u0131n\u0131 y\u00fckseltmek ad\u0131na tutulan raporlamalar\u0131 ve replike veritaban\u0131n\u0131 rahatl\u0131kla kullanabilirsiniz.<\/li>\r\n
      • Veriambar\u0131 denilen (Datawarehouse) veritaban\u0131n\u0131 sizlere olu\u015fturma imk\u00e2n\u0131 sunar.<\/li>\r\n
      • Kolay eri\u015febilirli\u011fi sa\u011flamak i\u00e7in, AS\/400’lerinizdeki (iSeries) kulland\u0131\u011f\u0131n\u0131z istedi\u011finiz veri ya da verileri DB2’den farkl\u0131 bir veritaban\u0131na kolayl\u0131kla replike(b\u00f6l\u00fcnme,\u00e7o\u011falma) edebilirsiniz.<\/li>\r\n<\/ul>\r\n","protected":false},"excerpt":{"rendered":"Veri Replikasyonu, i\u015flem s\u0131ras\u0131nda ortamda biriken verilerin birden fazla konumda tutundurma i\u015flemine verilen T\u00fcrk\u00e7e add\u0131r. T\u00fcm kullan\u0131c\u0131lar i\u00e7in,…\n","protected":false},"author":1,"featured_media":2550,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_singular_sidebar":"","csco_page_header_type":"","csco_appearance_grid":"","csco_page_load_nextpost":"","csco_post_video_location":[],"csco_post_video_location_hash":"","csco_post_video_url":"","csco_post_video_bg_start_time":0,"csco_post_video_bg_end_time":0},"categories":[3,8],"tags":[],"yoast_head":"\nVeri Replikasyonu Nedir? - Bulutistan Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/bulutistan.com\/blog\/veri-replikasyonu-nedir\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Veri Replikasyonu Nedir? - Bulutistan Blog\" \/>\n<meta property=\"og:description\" content=\"Veri Replikasyonu, i\u015flem s\u0131ras\u0131nda ortamda biriken verilerin birden fazla konumda tutundurma i\u015flemine verilen T\u00fcrk\u00e7e add\u0131r. 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