{"id":11561,"date":"2016-10-27T04:23:08","date_gmt":"2016-10-27T08:23:08","guid":{"rendered":"http:\/\/onlineappsdba.com\/?p=11561"},"modified":"2016-10-27T04:23:08","modified_gmt":"2016-10-27T08:23:08","slug":"oracle-traffic-director-otd-12c-basics-overview","status":"publish","type":"post","link":"https:\/\/onlineappsdba.com\/index.php\/2016\/10\/27\/oracle-traffic-director-otd-12c-basics-overview\/","title":{"rendered":"Oracle Traffic Director (OTD) 12c : Basics & Overview"},"content":{"rendered":"

\"Oracle<\/a><\/p>\n

Oracle Traffic Director<\/strong> (OTD) is software load balancer from Oracle that receive requests from client and forward it to back-end application like WebLogic , WebCenter, Portal etc. In this first post on OTD, I’ll be covering basic concepts<\/strong> related to OTD (More on installation & configuration of OTD later in future posts<\/span>)<\/p>\n

1.<\/strong> Oracle Traffic Director (OTD) is layer-7 software load balancer from Oracle.<\/p>\n

2.<\/strong> OTD can be configured as front end for Web Server (like OHS, Apache, IHS) or Application Servers (like WeBlogic, WebSphere)<\/p>\n

3.<\/strong> OTD is optimized for use in Oracle Exalogic Elastic Cloud<\/strong> and Oracle SuperCluster<\/strong><\/p>\n

4.<\/strong> On Exalogic, OTD can communicate to back-end servers on Exalogic’s InfiniBand<\/strong> fabric<\/p>\n

5.<\/strong> OTD can be configured for High Availability (HA)<\/strong> in both Active-Active<\/strong> (A-A<\/strong>) or Active-Passive<\/strong> (A-P<\/strong>) Mode .<\/p>\n

6.<\/strong> OTD can distribute client request to back-end servers in multiple load distribution algorithm like Round Robin<\/strong>, Least Connection Count<\/strong>, Least Response Time etc<\/strong><\/p>\n

7. <\/strong>You can deploy OTD in following 3 Topologies<\/p>\n

7.1 Basic<\/strong> – Single OTD <\/strong>: In this simple topology you have single instance of OTD accepting requests from clients and sending this to back-end servers .<\/p>\n

\"otd_singlenode\"<\/a><\/p>\n

7.2 Highly Available<\/strong> – Active-Passive<\/strong> : In this Topology, you have two instances of OTD but in Active Passive<\/strong> mode. If Active node goes down, passive OTD node becomes active .<\/p>\n

\"otd_ha\"<\/a><\/p>\n

7.3<\/strong> Highly Available – Active-Active<\/strong> : In this Topology, you have two instances of OTD but in Active-Active<\/strong> mode. This set-up would mean better utilisation of resources as Active Active but would need two virtual IPs <\/strong>(more on this later when I cover HA deployment of OTD<\/span>).<\/p>\n

8. Failover Group<\/strong>: is two OTD instance grouped by VIP to provide high availability in active-passive mode. In this Failover Group<\/strong> one instance is defined as Primary Instance<\/strong> while other as Backup Instance<\/strong>. If primary instance is not reachable then request will be routed to backup instance in that group .<\/p>\n

9.<\/strong> OTD can be managed using
\na)<\/strong> Fusion Middleware Control\u00a0 \/em
\nb)<\/strong> WLST (oracle_home\/otd\/common\/bin\/wlst.sh)<\/p>\n

10.<\/strong> OTD Can be installed & configured in one of two modes
\na) Collocated<\/strong> – OTD with WebLogic Server
\nb) Standalon<\/strong>e – OTD without WebLogic Server<\/p>\n

 <\/p>\n

Stay Tuned for Installation<\/strong> & Configuration<\/strong> of OTD in future post.<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Oracle Traffic Director (OTD) is software load balancer from Oracle that receive requests from client and forward it to back-end […]<\/p>\n","protected":false},"author":115,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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