{"id":47755,"date":"2023-12-11T15:12:55","date_gmt":"2023-12-11T07:12:55","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=47755"},"modified":"2023-12-11T15:12:55","modified_gmt":"2023-12-11T07:12:55","slug":"%e8%af%a6%e7%bb%86%e6%8f%8f%e8%bf%b0%e4%b8%80%e4%b8%8b-elasticsearch-%e7%b4%a2%e5%bc%95%e6%96%87%e6%a1%a3%e7%9a%84%e8%bf%87%e7%a8%8b%e3%80%82-4","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/11\/%e8%af%a6%e7%bb%86%e6%8f%8f%e8%bf%b0%e4%b8%80%e4%b8%8b-elasticsearch-%e7%b4%a2%e5%bc%95%e6%96%87%e6%a1%a3%e7%9a%84%e8%bf%87%e7%a8%8b%e3%80%82-4\/","title":{"rendered":"\u8be6\u7ec6\u63cf\u8ff0\u4e00\u4e0b Elasticsearch \u7d22\u5f15\u6587\u6863\u7684\u8fc7\u7a0b\u3002"},"content":{"rendered":"

“`” \u534f\u8c03\u8282\u70b9\u9ed8\u8ba4\u4f7f\u7528\u6587\u6863 ID \u53c2\u4e0e\u8ba1\u7b97\uff08\u4e5f\u652f\u6301\u901a\u8fc7 routing\uff09\uff0c\u4ee5\u4fbf\u4e3a\u8def\u7531\u63d0\u4f9b\u5408\u9002\u7684\u5206\u7247\u3002<\/p>\n

shard = hash(document_id) % (num_of_primary_shards)<\/p>\n

\u00a0<\/p>\n

1\u3001\u5f53\u5206\u7247\u6240\u5728\u7684\u8282\u70b9\u63a5\u6536\u5230\u6765\u81ea\u534f\u8c03\u8282\u70b9\u7684\u8bf7\u6c42\u540e\uff0c\u4f1a\u5c06\u8bf7\u6c42\u5199\u5165\u5230 MemoryBuffer\uff0c\u7136\u540e\u5b9a\u65f6\uff08\u9ed8\u8ba4\u662f\u6bcf\u9694 1 \u79d2\uff09\u5199\u5165\u5230 Filesystem Cache\uff0c\u8fd9\u4e2a\u4ece MomeryBuffer \u5230 Filesystem Cache \u7684\u8fc7\u7a0b\u5c31\u53eb\u505a refresh\uff1b<\/p>\n

\u00a0<\/p>\n

2\u3001\u5f53\u7136\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u5b58\u5728 Momery Buffer \u548c Filesystem Cache \u7684\u6570\u636e\u53ef\u80fd\u4f1a\u4e22\u5931\uff0cES \u662f\u901a\u8fc7 translog \u7684\u673a\u5236\u6765\u4fdd\u8bc1\u6570\u636e\u7684\u53ef\u9760\u6027\u7684\u3002\u5176\u5b9e\u73b0\u673a\u5236\u662f\u63a5\u6536\u5230\u8bf7\u6c42\u540e\uff0c\u540c\u65f6\u4e5f\u4f1a\u5199\u5165\u5230 translog \u4e2d\uff0c\u5f53 Filesystem cache \u4e2d\u7684\u6570\u636e\u5199\u5165\u5230\u78c1\u76d8\u4e2d\u65f6\uff0c\u624d\u4f1a\u6e05\u9664\u6389\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u53eb\u505a flush\uff1b<\/p>\n

\u00a0<\/p>\n

3\u3001\u5728 flush \u8fc7\u7a0b\u4e2d\uff0c\u5185\u5b58\u4e2d\u7684\u7f13\u51b2\u5c06\u88ab\u6e05\u9664\uff0c\u5185\u5bb9\u88ab\u5199\u5165\u4e00\u4e2a\u65b0\u6bb5\uff0c\u6bb5\u7684 fsync\u5c06\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u63d0\u4ea4\u70b9\uff0c\u5e76\u5c06\u5185\u5bb9\u5237\u65b0\u5230\u78c1\u76d8\uff0c\u65e7\u7684 translog \u5c06\u88ab\u5220\u9664\u5e76\u5f00\u59cb\u4e00\u4e2a\u65b0\u7684 translog\u3002<\/p>\n

\u00a0<\/p>\n

4\u3001flush \u89e6\u53d1\u7684\u65f6\u673a\u662f\u5b9a\u65f6\u89e6\u53d1\uff08\u9ed8\u8ba4 30 \u5206\u949f\uff09\u6216\u8005 translog \u53d8\u5f97\u592a\u5927\uff08\u9ed8\u8ba4\u4e3a 512M\uff09\u65f6\uff1b<\/p>\n

\u00a0<\/p>\n

<img alt=""img"" referrerpolicy=""no-referrer"" src=""http:\/\/res.mianshigee.com\/upload\/article\/20200307\/v2-98fc4f1cd2b3c13e56dead5850e9db95_1440w.jpg""><\/p>\n

\u00a0<\/p>\n

<strong>\u8865\u5145\uff1a\u5173\u4e8e Lucene \u7684 Segement\uff1a<\/strong><\/p>\n

\u00a0<\/p>\n

1\u3001Lucene \u7d22\u5f15\u662f\u7531\u591a\u4e2a\u6bb5\u7ec4\u6210\uff0c\u6bb5\u672c\u8eab\u662f\u4e00\u4e2a\u529f\u80fd\u9f50\u5168\u7684\u5012\u6392\u7d22\u5f15\u3002<\/p>\n

\u00a0<\/p>\n

2\u3001\u6bb5\u662f\u4e0d\u53ef\u53d8\u7684\uff0c\u5141\u8bb8 Lucene \u5c06\u65b0\u7684\u6587\u6863\u589e\u91cf\u5730\u6dfb\u52a0\u5230\u7d22\u5f15\u4e2d\uff0c\u800c\u4e0d\u7528\u4ece\u5934\u91cd\u5efa\u7d22\u5f15\u3002<\/p>\n

\u00a0<\/p>\n

3\u3001\u5bf9\u4e8e\u6bcf\u4e00\u4e2a\u641c\u7d22\u8bf7\u6c42\u800c\u8a00\uff0c\u7d22\u5f15\u4e2d\u7684\u6240\u6709\u6bb5\u90fd\u4f1a\u88ab\u641c\u7d22\uff0c\u5e76\u4e14\u6bcf\u4e2a\u6bb5\u4f1a\u6d88\u8017CPU \u7684\u65f6\u949f\u5468\u3001\u6587\u4ef6\u53e5\u67c4\u548c\u5185\u5b58\u3002\u8fd9\u610f\u5473\u7740\u6bb5\u7684\u6570\u91cf\u8d8a\u591a\uff0c\u641c\u7d22\u6027\u80fd\u4f1a\u8d8a\u4f4e\u3002<\/p>\n

\u00a0<\/p>\n

4\u3001\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0cElasticsearch \u4f1a\u5408\u5e76\u5c0f\u6bb5\u5230\u4e00\u4e2a\u8f83\u5927\u7684\u6bb5\uff0c\u63d0\u4ea4\u65b0\u7684\u5408\u5e76\u6bb5\u5230\u78c1\u76d8\uff0c\u5e76\u5220\u9664\u90a3\u4e9b\u65e7\u7684\u5c0f\u6bb5\u3002<\/p>\n

\u00a0<\/p>\n

<pre><code> "“`
\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"

“`” \u534f\u8c03\u8282\u70b9\u9ed8\u8ba4\u4f7f\u7528\u6587\u6863 ID \u53c2\u4e0e\u8ba1\u7b97\uff08\u4e5f\u652f\u6301\u901a\u8fc7 routing\uff09\uff0c\u4ee5\u4fbf\u4e3a\u8def\u7531 […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-47755","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/47755","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=47755"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/47755\/revisions"}],"predecessor-version":[{"id":47756,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/47755\/revisions\/47756"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=47755"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=47755"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=47755"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}