{"id":149,"date":"2009-11-14T21:49:27","date_gmt":"2009-11-14T21:49:27","guid":{"rendered":"http:\/\/press3.mcs.anl.gov\/romio\/?p=149"},"modified":"2009-11-14T21:49:27","modified_gmt":"2009-11-14T21:49:27","slug":"intrepid-performance-study","status":"publish","type":"post","link":"https:\/\/wordpress.cels.anl.gov\/romio\/2009\/11\/14\/intrepid-performance-study\/","title":{"rendered":"Understanding I\/O performance at Leadership Scale"},"content":{"rendered":"<p>Getting the best performance out of ROMIO can take a good bit of work and a great deal of experience.\u00a0 Before one can\u00a0 properly tune the various performance optimizations (data sieving, two-phase collective buffering, I\/O aggregator selection and placement, etc), one needs to understand the entire storage stack.\u00a0\u00a0 Such a study is time and labor intensive, but sometimes the resulting paper can get you an SC publication:<br \/>\n<a href=\"https:\/\/wordpress.cels.anl.gov\/romio\/wp-content\/uploads\/sites\/31\/2009\/11\/P1648.pdf\">I\/O Perfomance Challenges at Leadership Scale<\/a> (a link tot he PDF)<br \/>\n<a title=\" I\/O performance challenges at leadership scale\" href=\"http:\/\/dl.acm.org\/citation.cfm?id=1654100\">http:\/\/dl.acm.org\/citation.cfm?id=1654100<\/a> (a link to the citation)<br \/>\nWe spent a million CPU hours and benchmarked all the links between disks and compute nodes.\u00a0 While Intrepid will only be with us for a few years (UPDATE: Intrepid was decommissioned at the end of 2013), the approach in this paper should be applied to all new leadership-class machines.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Getting the best performance out of ROMIO can take a good bit of work and a great deal of experience.\u00a0 Before one can\u00a0 properly tune the various performance optimizations (data sieving, two-phase collective buffering, I\/O aggregator selection and placement, etc), one needs to understand the entire storage stack.\u00a0\u00a0 Such a study is time and labor &hellip;<\/p>\n","protected":false},"author":362,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[9],"tags":[],"class_list":["post-149","post","type-post","status-publish","format-standard","hentry","category-publications"],"acf":[],"_links":{"self":[{"href":"https:\/\/wordpress.cels.anl.gov\/romio\/wp-json\/wp\/v2\/posts\/149","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wordpress.cels.anl.gov\/romio\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wordpress.cels.anl.gov\/romio\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wordpress.cels.anl.gov\/romio\/wp-json\/wp\/v2\/users\/362"}],"replies":[{"embeddable":true,"href":"https:\/\/wordpress.cels.anl.gov\/romio\/wp-json\/wp\/v2\/comments?post=149"}],"version-history":[{"count":0,"href":"https:\/\/wordpress.cels.anl.gov\/romio\/wp-json\/wp\/v2\/posts\/149\/revisions"}],"wp:attachment":[{"href":"https:\/\/wordpress.cels.anl.gov\/romio\/wp-json\/wp\/v2\/media?parent=149"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wordpress.cels.anl.gov\/romio\/wp-json\/wp\/v2\/categories?post=149"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wordpress.cels.anl.gov\/romio\/wp-json\/wp\/v2\/tags?post=149"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}