{"version":"1.0","provider_name":"Tutorial","provider_url":"https:\/\/www.vskills.in\/certification\/tutorial","author_name":"Team Vskills","author_url":"https:\/\/www.vskills.in\/certification\/tutorial\/author\/vskills_admin\/","title":"HDFS Federation - Tutorial","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"fdGjvPU1Ae\"><a href=\"https:\/\/www.vskills.in\/certification\/tutorial\/hdfs-federation\/\">HDFS Federation<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/www.vskills.in\/certification\/tutorial\/hdfs-federation\/embed\/#?secret=fdGjvPU1Ae\" width=\"600\" height=\"338\" title=\"&#8220;HDFS Federation&#8221; &#8212; Tutorial\" data-secret=\"fdGjvPU1Ae\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/\/# sourceURL=https:\/\/www.vskills.in\/certification\/tutorial\/wp-includes\/js\/wp-embed.min.js\n<\/script>\n","description":"The solution to expanding Hadoop clusters indefinitely is to federate the NameNode. Before Hadoop 2 entered the scene, Hadoop clusters had to live with the fact that NameNode placed limits on the degree to which they could scale. Few clusters were able to scale beyond 3,000 or 4,000 nodes. NameNode\u2019s need to maintain records for...","thumbnail_url":"http:\/\/www.vskills.in\/lms\/wp-content\/uploads\/2016\/06\/hdfs-federation.jpg"}