{"id":569130,"date":"2019-02-13T08:00:35","date_gmt":"2019-02-13T16:00:35","guid":{"rendered":"https:\/\/www.microsoft.com\/en-us\/research\/?post_type=msr-research-item&#038;p=569130"},"modified":"2019-02-25T10:40:44","modified_gmt":"2019-02-25T18:40:44","slug":"tail-latency-meets-caching-an-unusual-alliance","status":"publish","type":"msr-video","link":"https:\/\/www.microsoft.com\/en-us\/research\/video\/tail-latency-meets-caching-an-unusual-alliance\/","title":{"rendered":"Tail Latency Meets Caching &#8211; An Unusual Alliance"},"content":{"rendered":"<p>In today\u2019s world of interactive computing, web services need to achieve low latency for almost all user requests (e.g., low 99-th percentile latency). Reducing the latency tail is challenging because tail events are rate and often have complex causes. Hence, tail latency has been a recurring theme in academic and industry systems research for over a decade.<\/p>\n<p>In this talk, I will demonstrate that caching can be a strong ally in the pursuit of low tail latency. My talk will present two concrete examples, in datacenter and edge caching, where redesigned caching systems lead to order-of-magnitude reductions in tail latency. These results contradict the common belief that, due to their non-negligible miss ratios, caches are of little benefit for reducing tail latency. I will show how to overcome this common belief by exploiting analytical performance modeling to guide the design of caching systems.<\/p>\n<p>While rooted in theory, my research is highly practical and conducted in continuous collaboration with partners from industry. I will describe how collaboration and open-source-prototypes have enabled production use of my research at a top-ten US website and deployment tests at several other companies.<\/p>\n<p>[<a href=\"https:\/\/www.microsoft.com\/en-us\/research\/wp-content\/uploads\/2019\/02\/42892_Tail_Latency_Meets_Caching_-_An_Unusual_Alliance-slides.pdf\" target=\"_blank\" rel=\"noopener\">Slides<\/a>]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In today\u2019s world of interactive computing, web services need to achieve low latency for almost all user requests (e.g., low 99-th percentile latency). Reducing the latency tail is challenging because tail events are rate and often have complex causes. Hence, tail latency has been a recurring theme in academic and industry systems research for over [&hellip;]<\/p>\n","protected":false},"featured_media":569241,"template":"","meta":{"msr-url-field":"","msr-podcast-episode":"","msrModifiedDate":"","msrModifiedDateEnabled":false,"ep_exclude_from_search":false,"_classifai_error":"","msr_hide_image_in_river":0,"footnotes":""},"research-area":[13547],"msr-video-type":[],"msr-locale":[268875],"msr-post-option":[],"msr-session-type":[],"msr-impact-theme":[],"msr-pillar":[],"msr-episode":[],"msr-research-theme":[],"class_list":["post-569130","msr-video","type-msr-video","status-publish","has-post-thumbnail","hentry","msr-research-area-systems-and-networking","msr-locale-en_us"],"msr_download_urls":"","msr_external_url":"https:\/\/youtu.be\/_vCqethp1cE","msr_secondary_video_url":"","msr_video_file":"","_links":{"self":[{"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-video\/569130","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-video"}],"about":[{"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/types\/msr-video"}],"version-history":[{"count":2,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-video\/569130\/revisions"}],"predecessor-version":[{"id":569649,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-video\/569130\/revisions\/569649"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/media\/569241"}],"wp:attachment":[{"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/media?parent=569130"}],"wp:term":[{"taxonomy":"msr-research-area","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/research-area?post=569130"},{"taxonomy":"msr-video-type","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-video-type?post=569130"},{"taxonomy":"msr-locale","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-locale?post=569130"},{"taxonomy":"msr-post-option","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-post-option?post=569130"},{"taxonomy":"msr-session-type","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-session-type?post=569130"},{"taxonomy":"msr-impact-theme","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-impact-theme?post=569130"},{"taxonomy":"msr-pillar","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-pillar?post=569130"},{"taxonomy":"msr-episode","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-episode?post=569130"},{"taxonomy":"msr-research-theme","embeddable":true,"href":"https:\/\/www.microsoft.com\/en-us\/research\/wp-json\/wp\/v2\/msr-research-theme?post=569130"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}