{"id":588,"date":"2012-10-24T20:39:50","date_gmt":"2012-10-25T01:39:50","guid":{"rendered":"http:\/\/crschmidt.net\/blog\/?p=588"},"modified":"2012-10-24T20:39:50","modified_gmt":"2012-10-25T01:39:50","slug":"some-comments-on-ec2-instance-heterogeneity","status":"publish","type":"post","link":"https:\/\/crschmidt.net\/blog\/archives\/588\/some-comments-on-ec2-instance-heterogeneity\/","title":{"rendered":"Some comments on EC2 instance heterogeneity"},"content":{"rendered":"<p>An article (<a href=\"https:\/\/www.usenix.org\/conference\/hotcloud12\/exploiting-hardware-heterogeneity-within-same-instance-type-amazon-ec2\">Exploiting Hardware Heterogeneity within the Same Instance Type of Amazon EC2<\/a>) linking to a paper from HotCloud &#8217;12 has some information about mixed instance types for Amazon EC2 machines. I found it interesting, so browsed through the article. Here are some observations I had when looking:<\/p>\n<p> &#8211; &#8220;Furthermore, the high-memory instances use identical Intel X5550 processors&#8221; &#8212; Not true, from what I can tell. E5-2665 processors are used across at least us-east availability zones for all m2 instances sizes &#8212; m2.xlarge, m2.2xlarge, and m2.4xlarge. In fact, in several thousand instances spun up, it seems that these instances are used up to 70% of the time in one availability zone (though almost not at all in another.)<br \/>\n &#8211; The CPUBench test was done across 20 instances, but the Redis test appears to have only been done against one of each type, as far as I can read. I&#8217;m not totally convinced &#8212; given the variability in performance between node types &#8212; that this is entirely explained by instance differences &#8212; though given the CPUBench scores, it&#8217;s clear that some of the variablity could well be coming from that.<\/p>\n<p>Anyway, I primarily wanted to comment on the high memory instances all using X5550s &#8212; since it&#8217;s clear that they don&#8217;t, at least not in US-East \ud83d\ude42<\/p>\n","protected":false},"excerpt":{"rendered":"<p>An article (Exploiting Hardware Heterogeneity within the Same Instance Type of Amazon EC2) linking to a paper from HotCloud &#8217;12 has some information about mixed instance types for Amazon EC2 machines. I found it interesting, so browsed through the article. Here are some observations I had when looking: &#8211; &#8220;Furthermore, the high-memory instances use identical [&hellip;]<\/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-588","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/crschmidt.net\/blog\/wp-json\/wp\/v2\/posts\/588","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/crschmidt.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/crschmidt.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/crschmidt.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/crschmidt.net\/blog\/wp-json\/wp\/v2\/comments?post=588"}],"version-history":[{"count":0,"href":"https:\/\/crschmidt.net\/blog\/wp-json\/wp\/v2\/posts\/588\/revisions"}],"wp:attachment":[{"href":"https:\/\/crschmidt.net\/blog\/wp-json\/wp\/v2\/media?parent=588"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/crschmidt.net\/blog\/wp-json\/wp\/v2\/categories?post=588"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/crschmidt.net\/blog\/wp-json\/wp\/v2\/tags?post=588"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}