{"id":110,"date":"2025-07-02T17:26:46","date_gmt":"2025-07-02T14:26:46","guid":{"rendered":"https:\/\/www.ertanerbek.com\/?p=110"},"modified":"2025-07-02T17:29:00","modified_gmt":"2025-07-02T14:29:00","slug":"fibre-channel-fc-kavramsal-yanilgilar-ve-mimarideki-yeri","status":"publish","type":"post","link":"https:\/\/www.ertanerbek.com\/?p=110","title":{"rendered":"Fibre Channel (FC) \u2013 Kavramsal Yan\u0131lg\u0131lar ve Mimarideki Yeri"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\"><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Fibre Channel (FC), \u00e7o\u011fu zaman ismindeki \u201cfibre\u201d ifadesi nedeniyle \u201cfiber optik ba\u011flant\u0131\u201d (Fibre Connection) \u015feklinde yanl\u0131\u015f yorumlanmaktad\u0131r. Oysa FC, bir fiziksel ba\u011flant\u0131 t\u00fcr\u00fcnden \u00e7ok daha fazlas\u0131 olup, depolama sistemleri aras\u0131nda y\u00fcksek h\u0131zl\u0131 ve d\u00fc\u015f\u00fck gecikmeli ileti\u015fim kurmak \u00fczere tasarlanm\u0131\u015f bir <strong>blok tabanl\u0131 iletim protokol\u00fc<\/strong>d\u00fcr. FC, Ethernet gibi bir iletim katman\u0131 sunar ancak uygulama alan\u0131 veri depolama altyap\u0131lar\u0131d\u0131r ve ileti\u015fimi SCSI komut seti \u00fczerinden ger\u00e7ekle\u015ftirir.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Blok Tabanl\u0131 \u0130leti\u015fim Nedir?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Blok tabanl\u0131 ileti\u015fimde veri, disk dosya sistemi taraf\u0131ndan belirlenmi\u015f sabit uzunluktaki bloklara (genellikle 512 B, 4 KB, 8 KB) b\u00f6l\u00fcn\u00fcr. Bu bloklar, genellikle a\u015fa\u011f\u0131daki ara y\u00fczlerle fiziksel disk(ler)e iletilir:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>SCSI (Serial Attached SCSI)<\/strong><\/li>\n\n\n\n<li><strong>NVMe (Non-Volatile Memory Express)<\/strong><\/li>\n\n\n\n<li><strong>SATA (Serial ATA)<\/strong><\/li>\n\n\n\n<li><strong>Fibre Channel (FC)<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0130letim yap\u0131s\u0131, y\u00fcksek IOPS (Input\/Output Operations Per Second) ve d\u00fc\u015f\u00fck gecikme beklentisi ta\u015f\u0131yan veri merkezleri i\u00e7in idealdir. Bu tip yap\u0131lar\u0131n temel avantajlar\u0131ndan biri, katman say\u0131s\u0131n\u0131n azl\u0131\u011f\u0131 nedeniyle eri\u015fim s\u00fcrelerinin k\u0131sa olmas\u0131d\u0131r.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Blok \u0130letimi \u2013 \u00d6rnek Veri Blo\u011fu<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>Offset\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0| Veri (Hex)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 | A\u00e7\u0131klama\n-------------|----------------------------------------------|------------------------------\n0x0000\u00a0\u00a0\u00a0    | 45 4C 4B 20 44 41 54 41 ...\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0  \u00a0\u00a0\u00a0\u00a0 | Kullan\u0131c\u0131 verisi (\u00f6rnek i\u00e7erik)\n0x01F0\u00a0\u00a0\u00a0\u00a0   | 00 00 00 00 00 00 00 00\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0 | Dolgu alan\u0131 \/ padding<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Bu yap\u0131daki ileti\u015fim, i\u015fletim sistemi kernel\u2019i ile disk kontrol birimi aras\u0131nda do\u011frudan ger\u00e7ekle\u015fir. Protokol, IP katman\u0131n\u0131 i\u00e7ermez ve veri herhangi bir dosya sistemine ba\u011fl\u0131 olmaks\u0131z\u0131n, blok adresleri ile fiziksel diske y\u00f6nlendirilir.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">IP Tabanl\u0131 (Packet-Based) Depolama \u0130leti\u015fimi<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">IP tabanl\u0131 depolama sistemlerinde (\u00f6rne\u011fin NAS, IP SAN) veri; istemciden sunucuya a\u015fa\u011f\u0131daki katmanlar arac\u0131l\u0131\u011f\u0131yla iletilir:<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Kullan\u0131c\u0131 uygulamas\u0131<\/li>\n\n\n\n<li>\u0130stemci i\u015fletim sistemi \/ kernel<\/li>\n\n\n\n<li>TCP\/IP y\u0131\u011f\u0131n\u0131<\/li>\n\n\n\n<li>Ethernet protokol\u00fc<\/li>\n\n\n\n<li>A\u011f anahtar\u0131 \/ y\u00f6nlendirici<\/li>\n\n\n\n<li>Depolama sunucusunun kernel\u2019i<\/li>\n\n\n\n<li>Protokol sunucusu (NFS, SMB, iSCSI)<\/li>\n\n\n\n<li>Depolama s\u00fcr\u00fcc\u00fcleri \u2192 Disk<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Bu \u00e7ok katmanl\u0131 yap\u0131, \u00f6zellikle ard\u0131\u015f\u0131k olmayan (random) veri eri\u015fimlerinde gecikme yarat\u0131r.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>IP Paket \u00d6rne\u011fi<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>+----------------------+----------------------------------------+\n| IP Header (20 byte)\u00a0 | 45 00 00 3C ...\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0|\n+----------------------+----------------------------------------+\n| TCP Header (20 byte) | 00 50 01 BB ...\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0|\n+----------------------+----------------------------------------+\n| Payload (veri)\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0| 48 65 6C 6C 6F 20 57 6F ...\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0   |\n+----------------------+----------------------------------------+<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Her IP paketinde, hem ba\u015fl\u0131k (header) bilgisi hem de y\u00fck (payload) yer al\u0131r. Bu ba\u015fl\u0131klar y\u00f6nlendirme ve hata kontrol\u00fc gibi i\u015flemleri sa\u011flarken, transfer s\u00fcresine ek y\u00fck bindirir.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Temel Kar\u015f\u0131la\u015ft\u0131rma: FC ve Ethernet Protokolleri<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>\u00d6zellik<\/strong><\/td><td><strong>Fibre Channel (FC)<\/strong><\/td><td><strong>Ethernet<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong>Protokol Katman\u0131<\/strong><\/td><td>Blok tabanl\u0131 (SCSI, NVMe)<\/td><td>Paket tabanl\u0131 (TCP\/IP, UDP)<\/td><\/tr><tr><td><strong>Kullan\u0131m Amac\u0131<\/strong><\/td><td>Veri depolama (SAN)<\/td><td>Genel a\u011f ileti\u015fimi + IP tabanl\u0131 SAN\/NAS<\/td><\/tr><tr><td><strong>Bant Geni\u015fli\u011fi<\/strong><\/td><td>8\/16\/32\/64 Gbps (dedike)<\/td><td>1\/10\/25\/40\/100\/400 Gbps (payla\u015f\u0131ml\u0131)<\/td><\/tr><tr><td><strong>Gecikme<\/strong><\/td><td>Mikrosaniye d\u00fczeyinde<\/td><td>Milisaniye d\u00fczeyinde<\/td><\/tr><tr><td><strong>Protokol Uyumlulu\u011fu<\/strong><\/td><td>Sadece FC protokol\u00fc<\/td><td>\u00c7oklu protokol (iSCSI, SMB, NFS, HTTP vb.)<\/td><\/tr><tr><td><strong>G\u00fcvenilirlik \/ QoS<\/strong><\/td><td>Y\u00fcksek ve deterministik<\/td><td>De\u011fi\u015fken; trafi\u011fe ve altyap\u0131ya ba\u011fl\u0131<\/td><\/tr><tr><td><strong>Y\u00f6netim Zorlu\u011fu<\/strong><\/td><td>Y\u00fcksek: FC Switch, HBA gerektirir<\/td><td>Daha sade; yayg\u0131n a\u011f ekipmanlar\u0131yla y\u00f6netilebilir<\/td><\/tr><tr><td><strong>Maliyet<\/strong><\/td><td>Y\u00fcksek (\u00f6zel donan\u0131m)<\/td><td>G\u00f6reli d\u00fc\u015f\u00fck (yayg\u0131n donan\u0131m ve altyap\u0131)<\/td><\/tr><tr><td><strong>Yayg\u0131nl\u0131k<\/strong><\/td><td>Veri merkezi i\u00e7i, kurumsal SAN\u2019lar<\/td><td>Ofis, kamp\u00fcs, WAN, veri merkezi geneli<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Avantaj \/ Dezavantaj Analizi<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Fibre Channel (FC)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Avantajlar:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Blok d\u00fczeyinde d\u00fc\u015f\u00fck gecikmeli eri\u015fim<\/li>\n\n\n\n<li>Depolama trafi\u011fi i\u00e7in izole a\u011f katman\u0131<\/li>\n\n\n\n<li>Y\u00fcksek hata tolerans\u0131 ve kararl\u0131l\u0131k<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Dezavantajlar:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Kurulum, y\u00f6netim ve bak\u0131m maliyeti y\u00fcksektir<\/li>\n\n\n\n<li>Yaln\u0131zca depolama trafi\u011fine uygundur<\/li>\n\n\n\n<li>\u00d6l\u00e7eklenebilirlik, Ethernet mimarisine k\u0131yasla s\u0131n\u0131rl\u0131d\u0131r<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Ethernet (IP tabanl\u0131 yap\u0131)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Avantajlar:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>D\u00fc\u015f\u00fck maliyet ve yayg\u0131n altyap\u0131<\/li>\n\n\n\n<li>\u00c7ok protokoll\u00fc \u00e7al\u0131\u015fabilme (iSCSI, NFS, SMB)<\/li>\n\n\n\n<li>Y\u00fcksek h\u0131zlara uygun \u00f6l\u00e7ekleme deste\u011fi<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Dezavantajlar:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Trafik payla\u015f\u0131m\u0131 nedeniyle de\u011fi\u015fken gecikme<\/li>\n\n\n\n<li>QoS ayarlar\u0131n\u0131n dikkatle yap\u0131lmamas\u0131 durumunda veri kayb\u0131 riski<\/li>\n\n\n\n<li>Paket i\u015fleme y\u00fck\u00fc nedeniyle CPU kullan\u0131m\u0131 artabilir<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Sonu\u00e7 ve \u00d6neri<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Blok tabanl\u0131 protokoller, milisaniye alt\u0131 gecikmelerin kritik oldu\u011fu <strong>y\u00fcksek performansl\u0131 kurumsal veri depolama<\/strong> senaryolar\u0131 i\u00e7in tercih edilmelidir. FC, bu ba\u011flamda d\u00fc\u015f\u00fck gecikme ve deterministik performans sunar. \u00d6te yandan, NAS ve IP SAN gibi IP tabanl\u0131 yap\u0131lar ise, esneklik ve maliyet a\u00e7\u0131s\u0131ndan avantaj sa\u011flar; dosya payla\u015f\u0131m\u0131, yedekleme, medya depolama gibi gecikmeye toleransl\u0131 i\u015flemlerde daha uygundur.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Depolama mimarisi se\u00e7iminde karar, altyap\u0131n\u0131n mevcut durumu, i\u015f y\u00fck\u00fc tipi, performans beklentisi ve operasyonel yetkinlikler \u00e7er\u00e7evesinde verilmelidir. IP tabanl\u0131 IP SAN ve NAS cihazlar\u0131 ile FC SCSI tabanl\u0131 SAN cihazlar\u0131 do\u011fru kullan\u0131ld\u0131\u011f\u0131nda m\u00fckemmel sonular verir ve maliyet etkindir.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Fibre Channel (FC), \u00e7o\u011fu zaman ismindeki \u201cfibre\u201d ifadesi nedeniyle \u201cfiber optik ba\u011flant\u0131\u201d (Fibre Connection) \u015feklinde&#8230;<\/p>\n","protected":false},"author":1,"featured_media":108,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10,30,1],"tags":[],"class_list":["post-110","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-storage","category-depolama-genel-bilgi","category-genel"],"_links":{"self":[{"href":"https:\/\/www.ertanerbek.com\/index.php?rest_route=\/wp\/v2\/posts\/110","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ertanerbek.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ertanerbek.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ertanerbek.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ertanerbek.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=110"}],"version-history":[{"count":1,"href":"https:\/\/www.ertanerbek.com\/index.php?rest_route=\/wp\/v2\/posts\/110\/revisions"}],"predecessor-version":[{"id":111,"href":"https:\/\/www.ertanerbek.com\/index.php?rest_route=\/wp\/v2\/posts\/110\/revisions\/111"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ertanerbek.com\/index.php?rest_route=\/wp\/v2\/media\/108"}],"wp:attachment":[{"href":"https:\/\/www.ertanerbek.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=110"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ertanerbek.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=110"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ertanerbek.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=110"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}