{"id":577,"date":"2017-09-22T12:45:12","date_gmt":"2017-09-22T12:45:12","guid":{"rendered":"http:\/\/wiki.thomasandsofia.com\/?p=577"},"modified":"2017-09-23T19:49:51","modified_gmt":"2017-09-23T19:49:51","slug":"placement-groups-46","status":"publish","type":"post","link":"https:\/\/wiki.thomasandsofia.com\/?p=577","title":{"rendered":"Placement Groups (46)"},"content":{"rendered":"<p>A Placement group is a logical grouping of instances within a single Availability Zone.\u00a0 Using placement groups enables applications to participate in a low-latency, 10 Gbps network.\u00a0 Placement groups are recommended for applications that benefit from low network latency, high network throughput, or both.<\/p>\n<p>Use Cases:<\/p>\n<p>Hadoop clusters, Cassandra Nodes<\/p>\n<h1>Exam Tips:<\/h1>\n<ul>\n<li>A placement group cannot span multiple Availability Zones\n<ul>\n<li>Does create a single point of failure.<\/li>\n<\/ul>\n<\/li>\n<li>The name you specify for a placement group must be unique within your AWS account. (Global for your account)<\/li>\n<li>Only certain types of instances can be launched in a placement group.\u00a0 (Compute Optimized, GPU, Memory, Storage Optimized.)<\/li>\n<li>AWS recommend homogeneous instances within placement groups.\n<ul>\n<li>Instances of the same size and same family.\u00a0 (Has to do with reservations&#8230;)<\/li>\n<\/ul>\n<\/li>\n<li>You cannot merge placement groups.<\/li>\n<li>You cannot move an existing instance into a placement group.\u00a0 You can create an AMI from your existing instance, and then launch a new instance from the AMI into a placement group.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>A Placement group is a logical grouping of instances within a single Availability Zone.\u00a0 Using placement groups enables applications to participate in a low-latency, 10 Gbps network.\u00a0 Placement groups are recommended for applications that benefit from low network latency, high network throughput, or both. Use Cases: Hadoop clusters, Cassandra Nodes Exam Tips: A placement group ..<\/p>\n<div class=\"clear-fix\"><\/div>\n<p><a href=\"https:\/\/wiki.thomasandsofia.com\/?p=577\" 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":[1],"tags":[],"class_list":["post-577","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/wiki.thomasandsofia.com\/index.php?rest_route=\/wp\/v2\/posts\/577","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=577"}],"version-history":[{"count":2,"href":"https:\/\/wiki.thomasandsofia.com\/index.php?rest_route=\/wp\/v2\/posts\/577\/revisions"}],"predecessor-version":[{"id":579,"href":"https:\/\/wiki.thomasandsofia.com\/index.php?rest_route=\/wp\/v2\/posts\/577\/revisions\/579"}],"wp:attachment":[{"href":"https:\/\/wiki.thomasandsofia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=577"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wiki.thomasandsofia.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=577"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wiki.thomasandsofia.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=577"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}