\u6628\u5e74\u672b\u304b\u3089Twitter\u3067\u9762\u767d\u3044\u52d5\u304d\u304c\u8d77\u304d\u3066\u3044\u307e\u3059\u3002\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u666e\u53ca\u3067\u76f4\u63a5\u6c11\u4e3b\u5236\u304c\u53ef\u80fd\u306b\u306a\u308b\u304b\u3082\u3057\u308c\u306a\u3044\u3068\u601d\u3063\u3066\u3044\u307e\u3057\u305f\u304c\u3001\u4e00\u3064\u76ee\u306e\u6ce2\u304c\u6765\u3064\u3064\u3042\u308b\u3088\u3046\u3067\u3059\u3002\u5f93\u6765\u306e\u30de\u30b9\u30b3\u30df\u3068\u306f\u5b8c\u5168\u306b\u5206\u96e2\u3057\u3066\u3001\u81ea\u7136\u767a\u751f\u3057\u305f\u300c\u91ce\u751f\u300d\u30aa\u30f3\u30d6\u30ba\u30de\u30f3\uff08\u203b\uff09\u304c\u6d3b\u52d5\u3057\u3066\u3044\u308b\u306e\u3067\u6642\u4ee3\u306e\u6d41\u308c\u3092\u611f\u3058\u307e\u3059\u3002
\n\u4eca\u9031\u306e\u4e16\u754c\u306e\u7814\u7a76\u6240\u306f\u3001Twitter\u793e\u3067\u3059\u3002\u4eca\u9031\u306f\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u306e\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3068\u95a2\u9023\u6280\u8853\u3092\u8abf\u3079\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002\u307e\u305f\u3061\u3087\u3063\u3068\u4ed5\u4e8b\u306e\u6ce2\u304c\u6765\u3066\u3044\u308b\u306e\u3067\u3001\u8abf\u67fb\u304c\u6d45\u304f\u306a\u308b\u3053\u3068\u306f\u3054\u5bb9\u8d66\u304f\u3060\u3055\u3044\u3002\u307e\u305aTwitter\u793e\u306e\u6280\u8853\u30d6\u30ed\u30b0\uff082017\uff09\u304b\u3089\uff1a
\nhttps:\/\/blog.twitter.com\/engineering\/en_us\/topics\/infrastructure\/2017\/the-infrastructure-behind-twitter-scale
\n\u30c8\u30e9\u30d5\u30a3\u30c3\u30af\u306e\u7206\u767a\u7684\u5897\u5927\u306b\u4f34\u3063\u3066\u30c7\u30fc\u30bf\u30bb\u30f3\u30bf\u30fc\u306e\u7d44\u307f\u63db\u3048\u3092\u3057\u305f\u69d8\u5b50\u304c\u66f8\u304b\u308c\u3066\u3044\u307e\u3059\u3002\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306e\u4f7f\u7528\u5272\u5408\u304c\u6700\u521d\u306e\u5186\u30b0\u30e9\u30d5\u3067\u3059\u304c\u3001\u610f\u5916\u306a\u3053\u3068\u306bDatabase\u3084Messaging\u306e\u5272\u5408\u306f\u4f4e\u304f\u3001Mesos\u3068\u3044\u3046\u306e\u304c35.9%\u3001Hadoop\u3068\u3044\u3046\u306e\u304c19.6%\u3092\u5360\u3081\u307e\u3059\u3002
\nHadoop \u3000 https:\/\/oss.nttdata.com\/hadoop\/hadoop.html Google\u767a\u7965\u306e\u6280\u8853\u3067\u3001\u5927\u898f\u6a21\u30c7\u30fc\u30bf\u306e\u84c4\u7a4d\u3068\u5206\u6790\u3092\u3057\u307e\u3059\u3002
\nMesos https:\/\/ja.wikipedia.org\/wiki\/Apache_Mesos \u5927\u5b66\u767a\u3001\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u306e\u96c6\u5408\u4f53\u3092\u7ba1\u7406\u3059\u308b\u4ed5\u7d44\u307f\u3001Twitter, Airbnb, Siri\u306a\u3069\u3067\u6d3b\u7528\u3002
\n\u3044\u307e\u307e\u3067\u3042\u307e\u308a\u52c9\u5f37\u3057\u3066\u3044\u306a\u304b\u3063\u305f\u3067\u3059\u304c\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u6280\u8853\u306f\u5b9f\u306b\u3088\u304f\u3067\u304d\u3066\u3044\u307e\u3059\u306d\u3002\u5186\u30b0\u30e9\u30d5\u306e\u6b8b\u308a\u306e\u9805\u76ee\u306f\u6587\u5b57\u901a\u308a\u3067\u3057\u3087\u3046\u3002
\n\u4e0b\u8a18\u6280\u8853\u30d6\u30ed\u30b0\u96c6\u306f\u3044\u308d\u3044\u308d\u52c9\u5f37\u306b\u306a\u308a\u305d\u3046\u3067\u3059\u3002
\nhttps:\/\/blog.twitter.com\/engineering\/en_us
\n\u30ea\u30c3\u30c1\u66f2\u7387\u306a\u3069\u3001\u6570\u5b66\u306e\u6982\u5ff5\u3082\u51fa\u3066\u304d\u3066\u9762\u767d\u3044\u3067\u3059\uff08\u3059\u3054\u304f\u5f79\u306b\u7acb\u3064\u308f\u3051\u3067\u306f\u306a\u3055\u305d\u3046\u3067\u3059\u304c\u2026\uff09
\nhttps:\/\/blog.twitter.com\/engineering\/en_us\/topics\/insights\/2022\/over-squashing–bottlenecks–and-graph-ricci-curvature
\nhttps:\/\/ja.wikipedia.org\/wiki\/%E3%83%AA%E3%83%83%E3%83%81%E3%83%86%E3%83%B3%E3%82%BD%E3%83%AB
\nTwitter\u306f2006\u5e74\u306b\u8a2d\u7acb\u3055\u308c\u3001\u65e5\u672c\u8a9e\u30b5\u30fc\u30d3\u30b9\u306f2009\u5e74\u306b\u5c0e\u5165\u3055\u308c\u305f\u3088\u3046\u3067\u3059\u3002<\/p>\n
\u203bombudsman \u30aa\u30f3\u30d6\u30ba\u30de\u30f3\u3000\u884c\u653f\u6a5f\u95a2\u3084\u30e1\u30c7\u30a3\u30a2\u3001\u793e\u4f1a\u306a\u3069\u3092\u5916\u90e8\u304b\u3089\u76e3\u8996\u3057\u3001\u6a29\u5229\u30fb\u5229\u76ca\u306e\u4fb5\u5bb3\u306e\u6551\u6e08\u3092\u56f3\u308b\u5236\u5ea6<\/p>\n
\u82f1\u8a9e\u306f\u4e0a\u8a18\u30d6\u30ed\u30b0\u304b\u3089\u3002\u72ec\u7279\u306e\u7528\u8a9e\u305f\u3061\u3067\u3059\u304c\u3001\u30a4\u30e1\u30fc\u30b8\u304c\u4f1d\u308f\u308a\u307e\u3059\u306d\u3002<\/p>\n
our fleet \u6211\u3005\u306e\u8266\u968a\u3000level 5 (Twitter\u793e\u306e\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u7fa4\u3092\u6307\u3057\u3066\u3044\u307e\u3059\uff09
\n“we began iterating through various network designs”\u3000\u69d8\u3005\u306a\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u8a2d\u8a08\u3092\u3072\u3068\u3064\u3065\u3064\u8a66\u3057\u59cb\u3081\u305f\u3002
\niterate \u30a4\u30c6\u30ec\u30a4\u30c8\u3000\u3072\u3068\u3064\u3065\u3064\u7e70\u308a\u8fd4\u3059\uff08\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u7528\u8a9e\u3067\u3059\uff09
\ncolo = a colocational facility \u8cb8\u3057\u30c7\u30fc\u30bf\u30fc\u30bb\u30f3\u30bf\u30fc
\nhttps:\/\/www.techtarget.com\/searchdatacenter\/definition\/colocation-colo
\n“Smaller blast radius of a single device failure” \u4e00\u3064\u306e\u30c7\u30d0\u30a4\u30b9\u4e0d\u826f\u306e\u7206\u767a\u534a\u5f84\u3092\u5c0f\u3055\u304f\u3059\u308b\u3053\u3068
\nblast \u7206\u767a\u3001\u7a81\u98a8\u3001\u30e9\u30c3\u30d1\u306e\u4e00\u5439\u304d\u3001\u767a\u7834 level 5
\n“route churn issues”\u3000churn \u30c1\u30e3\u30fc\u30f3\u306f\u5927\u578b\u306e\u30df\u30eb\u30af\u7f36\u3001\u725b\u4e73\u306e\u64b9\u62cc\u6a5f\u3000level 10 \u591a\u5206\u3001\u60c5\u5831\u306e\u7d4c\u8def\u3092\u6c7a\u3081\u308b\u4ed5\u7d44\u307f\u306e\u3053\u3068\u3067\u3057\u3087\u3046
\n“enables non-impacting rack migrations” \u88c5\u7f6e\u3092\u79fb\u52d5\u3057\u3066\u3082\u5f71\u97ff\u3092\u53ca\u307c\u3055\u306a\u3044\u3053\u3068\u3000\u3000impact \u306f\u300c\u5f71\u97ff\u300d\u306e\u610f\u5473\u3067\u591a\u7528\u3055\u308c\u307e\u3059\u3002
\n“it’s important to build a highly scalable architecture that will allow adding capacity incrementally instead in forklift-esque migrations” \uff08\u5168\u4f53\u306e\u518d\u8a2d\u8a08\uff09\u30fb\u30fb\u30fb\u3067\u306f\u306a\u304f\u30d5\u30a9\u30fc\u30af\u30ea\u30d5\u30c8\u98a8\u306e\u79fb\u8a2d\u306b\u3088\u308b\u6bb5\u968e\u7684\u306a\u80fd\u529b\u8ffd\u52a0\u3067\u62e1\u5f35\u53ef\u80fd\u306a\u8a2d\u8a08\u3092\u3064\u304f\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3042\u308b\u3002
\n-esque \u30a8\u30b9\u30af\u3000\u306f\u300c\uff5e\u98a8\u306e\u300d\u3000\u3000\u30d5\u30a9\u30fc\u30af\u30ea\u30d5\u30c8\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3068\u3001\u660e\u3089\u304b\u306b\u30aa\u30bf\u30af\u7528\u8a9e\u3067\u3059\u304c\u77e5\u7684\u306a\u97ff\u304d\u304c\u3042\u308a\u307e\u3059\u306d\u3002
\nad hoc \u30a2\u30c9\u30db\u30c3\u30af\u3000\u305d\u306e\u5834\u3057\u306e\u304e\u306e level 17
\nLessons learned \u5b66\u3093\u3060\u6559\u8a13
\n“There is no such thing as a temporary change or workaround: In most cases, workarounds are tech debt.” \u4e00\u6642\u7684\u306a\u5909\u66f4\u3084\u56de\u907f\u7b56\u306a\u3069\u3068\u3044\u3046\u3082\u306e\u306f\u306a\u3044\u3002\u305f\u3044\u3066\u3044\u306e\u5834\u5408\u3001\u56de\u907f\u7b56\u3068\u306f\u6280\u8853\u7684\u306a\u501f\u91d1\u3060\u3002\u3000\u203bad hoc\u5f0f\u3092\u591a\u7528\u3059\u308b\u304a\u524d\u304c\u8a00\u3046\u306a\u3068\u8a00\u308f\u308c\u305d\u3046\u3067\u3059\u304c\u3001\u6fc0\u3057\u304f\u540c\u610f\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6628\u5e74\u672b\u304b\u3089Twitter\u3067\u9762\u767d\u3044\u52d5\u304d\u304c\u8d77\u304d\u3066\u3044\u307e\u3059\u3002\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306e\u666e\u53ca\u3067\u76f4\u63a5\u6c11\u4e3b\u5236\u304c\u53ef\u80fd\u306b\u306a\u308b\u304b\u3082\u3057\u308c\u306a\u3044\u3068\u601d\u3063\u3066\u3044\u307e\u3057\u305f\u304c\u3001\u4e00\u3064\u76ee\u306e\u6ce2\u304c\u6765\u3064\u3064\u3042\u308b\u3088\u3046\u3067\u3059\u3002\u5f93\u6765\u306e\u30de\u30b9\u30b3\u30df\u3068\u306f\u5b8c\u5168\u306b\u5206\u96e2\u3057\u3066\u3001\u81ea\u7136\u767a\u751f\u3057\u305f\u300c\u91ce\u751f\u300d\u30aa\u30f3\u30d6\u30ba\u30de\u30f3\uff08\u203b\uff09\u304c\u6d3b\u52d5\u3057\u3066\u3044\u308b\u306e\u3067\u6642\u4ee3\u306e\u6d41\u308c\u3092\u611f\u3058\u307e\u3059\u3002 \u4eca\u9031\u306e\u4e16\u754c\u306e\u7814\u7a76\u6240\u306f\u3001Twitter\u793e\u3067\u3059\u3002\u4eca\u9031\u306f\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u4e0a\u306e\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u3068\u95a2\u9023\u6280\u8853\u3092\u8abf\u3079\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002\u307e\u305f\u3061\u3087\u3063\u3068\u4ed5\u4e8b\u306e\u6ce2\u304c\u6765\u3066\u3044\u308b\u306e\u3067\u3001\u8abf\u67fb\u304c\u6d45\u304f\u306a\u308b\u3053\u3068\u306f\u3054\u5bb9\u8d66\u304f\u3060\u3055\u3044\u3002\u307e\u305aTwitter\u793e\u306e\u6280\u8853\u30d6\u30ed\u30b0\uff082017\uff09\u304b\u3089\uff1a https:\/\/blog.twitter.com\/engineering\/en_us\/…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[47,43,42],"tags":[10,6,5],"class_list":["post-1631","post","type-post","status-publish","format-standard","hentry","category-worldresearchinstitutes","category-companies","category-tech","tag-worldresearchinstitutes","tag-companies","tag-tech"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.sekaiken.com\/index.php?rest_route=\/wp\/v2\/posts\/1631","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sekaiken.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sekaiken.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sekaiken.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sekaiken.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1631"}],"version-history":[{"count":0,"href":"https:\/\/www.sekaiken.com\/index.php?rest_route=\/wp\/v2\/posts\/1631\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.sekaiken.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1631"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sekaiken.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1631"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sekaiken.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1631"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}