{"id":273,"date":"2015-09-21T01:02:51","date_gmt":"2015-09-21T01:02:51","guid":{"rendered":"http:\/\/wiki.thomasandsofia.com\/?p=273"},"modified":"2015-09-21T03:17:11","modified_gmt":"2015-09-21T03:17:11","slug":"data-storage-concepts","status":"publish","type":"post","link":"https:\/\/wiki.thomasandsofia.com\/?p=273","title":{"rendered":"Data Storage Concepts"},"content":{"rendered":"<h3>Shared Storage<\/h3>\n<ul>\n<li>Multiple computers access data on the same storage device<\/li>\n<li>In the virtual world, shared storage means VMs<\/li>\n<li>Most vCenter features require this.<\/li>\n<\/ul>\n<p>vCenter features that REQUIRE shared storage<\/p>\n<ul>\n<li>DRS<\/li>\n<li>DPM<\/li>\n<li>Storage DRS<\/li>\n<li>High Availability<\/li>\n<li>Fault Tolerance<\/li>\n<\/ul>\n<h3>Shared Storage Supported Formats<\/h3>\n<ul>\n<li>Fibre Channel<\/li>\n<li>Fibre Channel over Ethernet (FCoE)<\/li>\n<li>iSCSI<\/li>\n<li>NFS<\/li>\n<li>Local Storage<\/li>\n<\/ul>\n<h4>Fibre Channel<\/h4>\n<ul>\n<li>Fibre Channel is a high speed network technology generally used for network storage.<\/li>\n<li>Generally speeds are 2, 4, 8 and 16 Gbps<\/li>\n<li>It used FCP (Fibre Channel Protocol) similar to TCP<\/li>\n<li>Often used for SAN (Storage Area Networks)<\/li>\n<li>Despite its name, it does NOT require fibre, but can run on an electrical interface.\u00a0 (This is why is uses the British spelling!)<\/li>\n<\/ul>\n<h5>Fibre Channel Topologies<\/h5>\n<p><a href=\"http:\/\/wiki.thomasandsofia.com\/wp-content\/uploads\/2015\/09\/Fibre_Channel-Topologies.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-274\" src=\"http:\/\/wiki.thomasandsofia.com\/wp-content\/uploads\/2015\/09\/Fibre_Channel-Topologies.jpg\" alt=\"Fibre_Channel-Topologies\" width=\"925\" height=\"508\" srcset=\"https:\/\/wiki.thomasandsofia.com\/wp-content\/uploads\/2015\/09\/Fibre_Channel-Topologies.jpg 925w, https:\/\/wiki.thomasandsofia.com\/wp-content\/uploads\/2015\/09\/Fibre_Channel-Topologies-300x165.jpg 300w, https:\/\/wiki.thomasandsofia.com\/wp-content\/uploads\/2015\/09\/Fibre_Channel-Topologies-150x82.jpg 150w\" sizes=\"auto, (max-width: 925px) 100vw, 925px\" \/><\/a><\/p>\n<h4>Fibre Channel over Ethernet<\/h4>\n<ul>\n<li>Specification that allows sending FCP over standard Ethernet.<\/li>\n<li>Generally ran on 10Gbps networks to maintain speed<\/li>\n<\/ul>\n<p><a href=\"http:\/\/wiki.thomasandsofia.com\/wp-content\/uploads\/2015\/09\/Storage_FCoE.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-275\" src=\"http:\/\/wiki.thomasandsofia.com\/wp-content\/uploads\/2015\/09\/Storage_FCoE.png\" alt=\"Storage_FCoE\" width=\"526\" height=\"473\" srcset=\"https:\/\/wiki.thomasandsofia.com\/wp-content\/uploads\/2015\/09\/Storage_FCoE.png 526w, https:\/\/wiki.thomasandsofia.com\/wp-content\/uploads\/2015\/09\/Storage_FCoE-300x270.png 300w, https:\/\/wiki.thomasandsofia.com\/wp-content\/uploads\/2015\/09\/Storage_FCoE-150x135.png 150w\" sizes=\"auto, (max-width: 526px) 100vw, 526px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<h4>iSCSI (Internet Small Computer Interface)<\/h4>\n<ul>\n<li>IP Based protocol for linking network based storage facilities. (Protocol sends SCSI commands)<\/li>\n<li>Can be used with LANS, WANS and Internet.<\/li>\n<li>Can be used with standard Ethernet technologies<\/li>\n<li>Requires no dedicated cabling<\/li>\n<li>Performance can be affected by competition for networking resources<\/li>\n<\/ul>\n<p>Terminology<\/p>\n<ul>\n<li>Initiator: The server that acts as the client and communicates with the storage device.\u00a0 Other PCs will connect to the initiator.<\/li>\n<li>Target: The storage device<\/li>\n<\/ul>\n<h4>NFS (Network File System)<\/h4>\n<ul>\n<li>Standard networking protocol to mount a remote partition as if it was a local drive.<\/li>\n<\/ul>\n<h3>vSphere Storage Appliance (VSA)<\/h3>\n<ul>\n<li>Allows creation of shared storage from the local storage devices in the ESXi hosts<\/li>\n<li>Provides management and control to share these devices to take advantage of DRS, HA and Fault Tolerance<\/li>\n<li>Designate disks within ESXi hosts and VSA does the rest.<\/li>\n<li>Replicates data between ESXi hosts, so if one fails, another can take over.<\/li>\n<li><span style=\"color: #ff0000;\">Runs as a VM or simply a server on the host?<\/span><\/li>\n<\/ul>\n<h3>vFlash<\/h3>\n<ul>\n<li>Good for VMs requiring high speed storage access<\/li>\n<li>Uses internal SSD drives to accelerate READ performance<\/li>\n<li>vFlash operates like a read-cache<\/li>\n<li>VM must be configured to use the vFlash storage<\/li>\n<\/ul>\n<h3>Datastores<\/h3>\n<ul>\n<li>Virtual Machines are stored in containers called &#8220;Datastores&#8221;<\/li>\n<li>These are Logical Volumes that allow storage of ESXi host and VMs<\/li>\n<li>2 types of Datastores\n<ul>\n<li>Virtual Machine File System (VMFS): Local, iSCSI, Fibre Channel, FCoE<\/li>\n<li>Network File System (NFS): Network Attached Storage (NAS)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Shared Storage Multiple computers access data on the same storage device In the virtual world, shared storage means VMs Most vCenter features require this. vCenter features that REQUIRE shared storage DRS DPM Storage DRS High Availability Fault Tolerance Shared Storage Supported Formats Fibre Channel Fibre Channel over Ethernet (FCoE) iSCSI NFS Local Storage Fibre Channel ..<\/p>\n<div class=\"clear-fix\"><\/div>\n<p><a href=\"https:\/\/wiki.thomasandsofia.com\/?p=273\" title=\"read more...\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14,13],"tags":[],"class_list":["post-273","post","type-post","status-publish","format-standard","hentry","category-data-center-virtualization","category-vmware"],"_links":{"self":[{"href":"https:\/\/wiki.thomasandsofia.com\/index.php?rest_route=\/wp\/v2\/posts\/273","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wiki.thomasandsofia.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wiki.thomasandsofia.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wiki.thomasandsofia.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wiki.thomasandsofia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=273"}],"version-history":[{"count":6,"href":"https:\/\/wiki.thomasandsofia.com\/index.php?rest_route=\/wp\/v2\/posts\/273\/revisions"}],"predecessor-version":[{"id":281,"href":"https:\/\/wiki.thomasandsofia.com\/index.php?rest_route=\/wp\/v2\/posts\/273\/revisions\/281"}],"wp:attachment":[{"href":"https:\/\/wiki.thomasandsofia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=273"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wiki.thomasandsofia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=273"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wiki.thomasandsofia.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=273"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}