{"id":815,"date":"2018-07-20T08:32:21","date_gmt":"2018-07-20T00:32:21","guid":{"rendered":"https:\/\/blog.jsjs.org\/?p=815"},"modified":"2018-07-20T08:32:21","modified_gmt":"2018-07-20T00:32:21","slug":"%e3%80%90%e5%88%86%e5%b8%83%e5%bc%8f%e3%80%91zookeeper%e7%9a%84leader%e9%80%89%e4%b8%be","status":"publish","type":"post","link":"https:\/\/blog.jsjs.org\/?p=815","title":{"rendered":"\u3010\u5206\u5e03\u5f0f\u3011Zookeeper\u7684Leader\u9009\u4e3e"},"content":{"rendered":"

\u4e00\u3001\u524d\u8a00<\/strong><\/p>\n

\u524d\u9762\u5b66\u4e60\u4e86Zookeeper\u670d\u52a1\u7aef\u7684\u76f8\u5173\u7ec6\u8282\uff0c\u5176\u4e2d\u5bf9\u4e8e\u96c6\u7fa4\u542f\u52a8\u800c\u8a00\uff0c\u5f88\u91cd\u8981\u7684\u4e00\u90e8\u5206\u5c31\u662fLeader\u9009\u4e3e\uff0c\u63a5\u7740\u5c31\u5f00\u59cb\u6df1\u5165\u5b66\u4e60Leader\u9009\u4e3e\u3002<\/p>\n

\u4e8c\u3001Leader\u9009\u4e3e<\/strong><\/p>\n

2.1 Leader\u9009\u4e3e\u6982\u8ff0<\/p>\n

Leader\u9009\u4e3e\u662f\u4fdd\u8bc1\u5206\u5e03\u5f0f\u6570\u636e\u4e00\u81f4\u6027\u7684\u5173\u952e\u6240\u5728\u3002\u5f53Zookeeper\u96c6\u7fa4\u4e2d\u7684\u4e00\u53f0\u670d\u52a1\u5668\u51fa\u73b0\u4ee5\u4e0b\u4e24\u79cd\u60c5\u51b5\u4e4b\u4e00\u65f6\uff0c\u9700\u8981\u8fdb\u5165Leader\u9009\u4e3e\u3002<\/p>\n

(1) \u670d\u52a1\u5668\u521d\u59cb\u5316\u542f\u52a8\u3002<\/p>\n

(2) \u670d\u52a1\u5668\u8fd0\u884c\u671f\u95f4\u65e0\u6cd5\u548cLeader\u4fdd\u6301\u8fde\u63a5\u3002<\/p>\n

\u4e0b\u9762\u5c31\u4e24\u79cd\u60c5\u51b5\u8fdb\u884c\u5206\u6790\u8bb2\u89e3\u3002<\/p>\n

1. \u670d\u52a1\u5668\u542f\u52a8\u65f6\u671f\u7684Leader\u9009\u4e3e<\/p>\n

\u82e5\u8fdb\u884cLeader\u9009\u4e3e\uff0c\u5219\u81f3\u5c11\u9700\u8981\u4e24\u53f0\u673a\u5668\uff0c\u8fd9\u91cc\u9009\u53d63\u53f0\u673a\u5668\u7ec4\u6210\u7684\u670d\u52a1\u5668\u96c6\u7fa4\u4e3a\u4f8b\u3002\u5728\u96c6\u7fa4\u521d\u59cb\u5316\u9636\u6bb5\uff0c\u5f53\u6709\u4e00\u53f0\u670d\u52a1\u5668Server1\u542f\u52a8\u65f6\uff0c\u5176\u5355\u72ec\u65e0\u6cd5\u8fdb\u884c\u548c\u5b8c\u6210Leader\u9009\u4e3e\uff0c\u5f53\u7b2c\u4e8c\u53f0\u670d\u52a1\u5668Server2\u542f\u52a8\u65f6\uff0c\u6b64\u65f6\u4e24\u53f0\u673a\u5668\u53ef\u4ee5\u76f8\u4e92\u901a\u4fe1\uff0c\u6bcf\u53f0\u673a\u5668\u90fd\u8bd5\u56fe\u627e\u5230Leader\uff0c\u4e8e\u662f\u8fdb\u5165Leader\u9009\u4e3e\u8fc7\u7a0b\u3002\u9009\u4e3e\u8fc7\u7a0b\u5982\u4e0b<\/p>\n

(1) \u6bcf\u4e2aServer\u53d1\u51fa\u4e00\u4e2a\u6295\u7968<\/strong>\u3002\u7531\u4e8e\u662f\u521d\u59cb\u60c5\u51b5\uff0cServer1\u548cServer2\u90fd\u4f1a\u5c06\u81ea\u5df1\u4f5c\u4e3aLeader\u670d\u52a1\u5668\u6765\u8fdb\u884c\u6295\u7968\uff0c\u6bcf\u6b21\u6295\u7968\u4f1a\u5305\u542b\u6240\u63a8\u4e3e\u7684\u670d\u52a1\u5668\u7684myid\u548cZXID\uff0c\u4f7f\u7528(myid, ZXID)\u6765\u8868\u793a\uff0c\u6b64\u65f6Server1\u7684\u6295\u7968\u4e3a(1, 0)\uff0cServer2\u7684\u6295\u7968\u4e3a(2, 0)\uff0c\u7136\u540e\u5404\u81ea\u5c06\u8fd9\u4e2a\u6295\u7968\u53d1\u7ed9\u96c6\u7fa4\u4e2d\u5176\u4ed6\u673a\u5668\u3002<\/p>\n

(2)\u00a0\u63a5\u53d7\u6765\u81ea\u5404\u4e2a\u670d\u52a1\u5668\u7684\u6295\u7968<\/strong>\u3002\u96c6\u7fa4\u7684\u6bcf\u4e2a\u670d\u52a1\u5668\u6536\u5230\u6295\u7968\u540e\uff0c\u9996\u5148\u5224\u65ad\u8be5\u6295\u7968\u7684\u6709\u6548\u6027\uff0c\u5982\u68c0\u67e5\u662f\u5426\u662f\u672c\u8f6e\u6295\u7968\u3001\u662f\u5426\u6765\u81eaLOOKING\u72b6\u6001\u7684\u670d\u52a1\u5668\u3002<\/p>\n

(3) \u5904\u7406\u6295\u7968<\/strong>\u3002\u9488\u5bf9\u6bcf\u4e00\u4e2a\u6295\u7968\uff0c\u670d\u52a1\u5668\u90fd\u9700\u8981\u5c06\u522b\u4eba\u7684\u6295\u7968\u548c\u81ea\u5df1\u7684\u6295\u7968\u8fdb\u884cPK\uff0cPK\u89c4\u5219\u5982\u4e0b<\/p>\n

\u00b7 \u4f18\u5148\u68c0\u67e5ZXID<\/strong>\u3002ZXID\u6bd4\u8f83\u5927\u7684\u670d\u52a1\u5668\u4f18\u5148\u4f5c\u4e3aLeader\u3002<\/p>\n

\u00b7 \u5982\u679cZXID\u76f8\u540c\uff0c\u90a3\u4e48\u5c31\u6bd4\u8f83myid<\/strong>\u3002myid\u8f83\u5927\u7684\u670d\u52a1\u5668\u4f5c\u4e3aLeader\u670d\u52a1\u5668\u3002<\/p>\n

\u5bf9\u4e8eServer1\u800c\u8a00\uff0c\u5b83\u7684\u6295\u7968\u662f(1, 0)\uff0c\u63a5\u6536Server2\u7684\u6295\u7968\u4e3a(2, 0)\uff0c\u9996\u5148\u4f1a\u6bd4\u8f83\u4e24\u8005\u7684ZXID\uff0c\u5747\u4e3a0\uff0c\u518d\u6bd4\u8f83myid\uff0c\u6b64\u65f6Server2\u7684myid\u6700\u5927\uff0c\u4e8e\u662f\u66f4\u65b0\u81ea\u5df1\u7684\u6295\u7968\u4e3a(2, 0)\uff0c\u7136\u540e\u91cd\u65b0\u6295\u7968\uff0c\u5bf9\u4e8eServer2\u800c\u8a00\uff0c\u5176\u65e0\u987b\u66f4\u65b0\u81ea\u5df1\u7684\u6295\u7968\uff0c\u53ea\u662f\u518d\u6b21\u5411\u96c6\u7fa4\u4e2d\u6240\u6709\u673a\u5668\u53d1\u51fa\u4e0a\u4e00\u6b21\u6295\u7968\u4fe1\u606f\u5373\u53ef\u3002<\/p>\n

(4) \u7edf\u8ba1\u6295\u7968<\/strong>\u3002\u6bcf\u6b21\u6295\u7968\u540e\uff0c\u670d\u52a1\u5668\u90fd\u4f1a\u7edf\u8ba1\u6295\u7968\u4fe1\u606f\uff0c\u5224\u65ad\u662f\u5426\u5df2\u7ecf\u6709\u8fc7\u534a\u673a\u5668\u63a5\u53d7\u5230\u76f8\u540c\u7684\u6295\u7968\u4fe1\u606f\uff0c\u5bf9\u4e8eServer1\u3001Server2\u800c\u8a00\uff0c\u90fd\u7edf\u8ba1\u51fa\u96c6\u7fa4\u4e2d\u5df2\u7ecf\u6709\u4e24\u53f0\u673a\u5668\u63a5\u53d7\u4e86(2, 0)\u7684\u6295\u7968\u4fe1\u606f\uff0c\u6b64\u65f6\u4fbf\u8ba4\u4e3a\u5df2\u7ecf\u9009\u51fa\u4e86Leader\u3002<\/p>\n

(5) \u6539\u53d8\u670d\u52a1\u5668\u72b6\u6001<\/strong>\u3002\u4e00\u65e6\u786e\u5b9a\u4e86Leader\uff0c\u6bcf\u4e2a\u670d\u52a1\u5668\u5c31\u4f1a\u66f4\u65b0\u81ea\u5df1\u7684\u72b6\u6001\uff0c\u5982\u679c\u662fFollower\uff0c\u90a3\u4e48\u5c31\u53d8\u66f4\u4e3aFOLLOWING\uff0c\u5982\u679c\u662fLeader\uff0c\u5c31\u53d8\u66f4\u4e3aLEADING\u3002<\/p>\n

2. \u670d\u52a1\u5668\u8fd0\u884c\u65f6\u671f\u7684Leader\u9009\u4e3e<\/p>\n

\u5728Zookeeper\u8fd0\u884c\u671f\u95f4\uff0cLeader\u4e0e\u975eLeader\u670d\u52a1\u5668\u5404\u53f8\u5176\u804c\uff0c\u5373\u4fbf\u5f53\u6709\u975eLeader\u670d\u52a1\u5668\u5b95\u673a\u6216\u65b0\u52a0\u5165\uff0c\u6b64\u65f6\u4e5f\u4e0d\u4f1a\u5f71\u54cdLeader\uff0c\u4f46\u662f\u4e00\u65e6Leader\u670d\u52a1\u5668\u6302\u4e86\uff0c\u90a3\u4e48\u6574\u4e2a\u96c6\u7fa4\u5c06\u6682\u505c\u5bf9\u5916\u670d\u52a1\uff0c\u8fdb\u5165\u65b0\u4e00\u8f6eLeader\u9009\u4e3e\uff0c\u5176\u8fc7\u7a0b\u548c\u542f\u52a8\u65f6\u671f\u7684Leader\u9009\u4e3e\u8fc7\u7a0b\u57fa\u672c\u4e00\u81f4\u3002\u5047\u8bbe\u6b63\u5728\u8fd0\u884c\u7684\u6709Server1\u3001Server2\u3001Server3\u4e09\u53f0\u670d\u52a1\u5668\uff0c\u5f53\u524dLeader\u662fServer2\uff0c\u82e5\u67d0\u4e00\u65f6\u523bLeader\u6302\u4e86\uff0c\u6b64\u65f6\u4fbf\u5f00\u59cbLeader\u9009\u4e3e\u3002\u9009\u4e3e\u8fc7\u7a0b\u5982\u4e0b<\/p>\n

(1)\u00a0\u53d8\u66f4\u72b6\u6001<\/strong>\u3002Leader\u6302\u540e\uff0c\u4f59\u4e0b\u7684\u975eObserver\u670d\u52a1\u5668\u90fd\u4f1a\u8bb2\u81ea\u5df1\u7684\u670d\u52a1\u5668\u72b6\u6001\u53d8\u66f4\u4e3aLOOKING\uff0c\u7136\u540e\u5f00\u59cb\u8fdb\u5165Leader\u9009\u4e3e\u8fc7\u7a0b\u3002<\/p>\n

(2)\u00a0\u6bcf\u4e2aServer\u4f1a\u53d1\u51fa\u4e00\u4e2a\u6295\u7968<\/strong>\u3002\u5728\u8fd0\u884c\u671f\u95f4\uff0c\u6bcf\u4e2a\u670d\u52a1\u5668\u4e0a\u7684ZXID\u53ef\u80fd\u4e0d\u540c\uff0c\u6b64\u65f6\u5047\u5b9aServer1\u7684ZXID\u4e3a123\uff0cServer3\u7684ZXID\u4e3a122\uff1b\u5728\u7b2c\u4e00\u8f6e\u6295\u7968\u4e2d\uff0cServer1\u548cServer3\u90fd\u4f1a\u6295\u81ea\u5df1\uff0c\u4ea7\u751f\u6295\u7968(1, 123)\uff0c(3, 122)\uff0c\u7136\u540e\u5404\u81ea\u5c06\u6295\u7968\u53d1\u9001\u7ed9\u96c6\u7fa4\u4e2d\u6240\u6709\u673a\u5668\u3002<\/p>\n

(3)\u00a0\u63a5\u6536\u6765\u81ea\u5404\u4e2a\u670d\u52a1\u5668\u7684\u6295\u7968<\/strong>\u3002\u4e0e\u542f\u52a8\u65f6\u8fc7\u7a0b\u76f8\u540c\u3002<\/p>\n

(4)\u00a0\u5904\u7406\u6295\u7968<\/strong>\u3002\u4e0e\u542f\u52a8\u65f6\u8fc7\u7a0b\u76f8\u540c\uff0c\u6b64\u65f6\uff0cServer1\u5c06\u4f1a\u6210\u4e3aLeader\u3002<\/p>\n

(5)\u00a0\u7edf\u8ba1\u6295\u7968<\/strong>\u3002\u4e0e\u542f\u52a8\u65f6\u8fc7\u7a0b\u76f8\u540c\u3002<\/p>\n

(6)\u00a0\u6539\u53d8\u670d\u52a1\u5668\u7684\u72b6\u6001<\/strong>\u3002\u4e0e\u542f\u52a8\u65f6\u8fc7\u7a0b\u76f8\u540c\u3002<\/p>\n

2.2 Leader\u9009\u4e3e\u7b97\u6cd5\u5206\u6790<\/p>\n

\u57283.4.0\u540e\u7684Zookeeper\u7684\u7248\u672c\u53ea\u4fdd\u7559\u4e86TCP\u7248\u672c\u7684FastLeaderElection\u9009\u4e3e\u7b97\u6cd5\u3002\u5f53\u4e00\u53f0\u673a\u5668\u8fdb\u5165Leader\u9009\u4e3e\u65f6\uff0c\u5f53\u524d\u96c6\u7fa4\u53ef\u80fd\u4f1a\u5904\u4e8e\u4ee5\u4e0b\u4e24\u79cd\u72b6\u6001<\/p>\n

\u00b7 \u96c6\u7fa4\u4e2d\u5df2\u7ecf\u5b58\u5728Leader\u3002<\/p>\n

\u00b7 \u96c6\u7fa4\u4e2d\u4e0d\u5b58\u5728Leader\u3002<\/p>\n

\u5bf9\u4e8e\u96c6\u7fa4\u4e2d\u5df2\u7ecf\u5b58\u5728Leader\u800c\u8a00\uff0c\u6b64\u79cd\u60c5\u51b5\u4e00\u822c\u90fd\u662f\u67d0\u53f0\u673a\u5668\u542f\u52a8\u5f97\u8f83\u665a\uff0c\u5728\u5176\u542f\u52a8\u4e4b\u524d\uff0c\u96c6\u7fa4\u5df2\u7ecf\u5728\u6b63\u5e38\u5de5\u4f5c\uff0c\u5bf9\u8fd9\u79cd\u60c5\u51b5\uff0c\u8be5\u673a\u5668\u8bd5\u56fe\u53bb\u9009\u4e3eLeader\u65f6\uff0c\u4f1a\u88ab\u544a\u77e5\u5f53\u524d\u670d\u52a1\u5668\u7684Leader\u4fe1\u606f\uff0c\u5bf9\u4e8e\u8be5\u673a\u5668\u800c\u8a00\uff0c\u4ec5\u4ec5\u9700\u8981\u548cLeader\u673a\u5668\u5efa\u7acb\u8d77\u8fde\u63a5\uff0c\u5e76\u8fdb\u884c\u72b6\u6001\u540c\u6b65\u5373\u53ef\u3002\u800c\u5728\u96c6\u7fa4\u4e2d\u4e0d\u5b58\u5728Leader\u60c5\u51b5\u4e0b\u5219\u4f1a\u76f8\u5bf9\u590d\u6742\uff0c\u5176\u6b65\u9aa4\u5982\u4e0b<\/p>\n

(1)\u00a0\u7b2c\u4e00\u6b21\u6295\u7968<\/strong>\u3002\u65e0\u8bba\u54ea\u79cd\u5bfc\u81f4\u8fdb\u884cLeader\u9009\u4e3e\uff0c\u96c6\u7fa4\u7684\u6240\u6709\u673a\u5668\u90fd\u5904\u4e8e\u8bd5\u56fe\u9009\u4e3e\u51fa\u4e00\u4e2aLeader\u7684\u72b6\u6001\uff0c\u5373LOOKING\u72b6\u6001\uff0cLOOKING\u673a\u5668\u4f1a\u5411\u6240\u6709\u5176\u4ed6\u673a\u5668\u53d1\u9001\u6d88\u606f\uff0c\u8be5\u6d88\u606f\u79f0\u4e3a\u6295\u7968\u3002\u6295\u7968\u4e2d\u5305\u542b\u4e86SID\uff08\u670d\u52a1\u5668\u7684\u552f\u4e00\u6807\u8bc6\uff09\u548cZXID\uff08\u4e8b\u52a1ID\uff09\uff0c(SID, ZXID)\u5f62\u5f0f\u6765\u6807\u8bc6\u4e00\u6b21\u6295\u7968\u4fe1\u606f\u3002\u5047\u5b9aZookeeper\u75315\u53f0\u673a\u5668\u7ec4\u6210\uff0cSID\u5206\u522b\u4e3a1\u30012\u30013\u30014\u30015\uff0cZXID\u5206\u522b\u4e3a9\u30019\u30019\u30018\u30018\uff0c\u5e76\u4e14\u6b64\u65f6SID\u4e3a2\u7684\u673a\u5668\u662fLeader\u673a\u5668\uff0c\u67d0\u4e00\u65f6\u523b\uff0c1\u30012\u6240\u5728\u673a\u5668\u51fa\u73b0\u6545\u969c\uff0c\u56e0\u6b64\u96c6\u7fa4\u5f00\u59cb\u8fdb\u884cLeader\u9009\u4e3e\u3002\u5728\u7b2c\u4e00\u6b21\u6295\u7968\u65f6\uff0c\u6bcf\u53f0\u673a\u5668\u90fd\u4f1a\u5c06\u81ea\u5df1\u4f5c\u4e3a\u6295\u7968\u5bf9\u8c61\uff0c\u4e8e\u662fSID\u4e3a3\u30014\u30015\u7684\u673a\u5668\u6295\u7968\u60c5\u51b5\u5206\u522b\u4e3a(3, 9)\uff0c(4, 8)\uff0c (5, 8)\u3002<\/p>\n

(2)\u00a0\u53d8\u66f4\u6295\u7968<\/strong>\u3002\u6bcf\u53f0\u673a\u5668\u53d1\u51fa\u6295\u7968\u540e\uff0c\u4e5f\u4f1a\u6536\u5230\u5176\u4ed6\u673a\u5668\u7684\u6295\u7968\uff0c\u6bcf\u53f0\u673a\u5668\u4f1a\u6839\u636e\u4e00\u5b9a\u89c4\u5219\u6765\u5904\u7406\u6536\u5230\u7684\u5176\u4ed6\u673a\u5668\u7684\u6295\u7968\uff0c\u5e76\u4ee5\u6b64\u6765\u51b3\u5b9a\u662f\u5426\u9700\u8981\u53d8\u66f4\u81ea\u5df1\u7684\u6295\u7968\uff0c\u8fd9\u4e2a\u89c4\u5219\u4e5f\u662f\u6574\u4e2aLeader\u9009\u4e3e\u7b97\u6cd5\u7684\u6838\u5fc3\u6240\u5728\uff0c\u5176\u4e2d\u672f\u8bed\u63cf\u8ff0\u5982\u4e0b<\/p>\n

\u00b7 vote_sid<\/strong>\uff1a\u63a5\u6536\u5230\u7684\u6295\u7968\u4e2d\u6240\u63a8\u4e3eLeader\u670d\u52a1\u5668\u7684SID\u3002<\/p>\n

\u00b7 vote_zxid<\/strong>\uff1a\u63a5\u6536\u5230\u7684\u6295\u7968\u4e2d\u6240\u63a8\u4e3eLeader\u670d\u52a1\u5668\u7684ZXID\u3002<\/p>\n

\u00b7 self_sid<\/strong>\uff1a\u5f53\u524d\u670d\u52a1\u5668\u81ea\u5df1\u7684SID\u3002<\/p>\n

\u00b7 self_zxid<\/strong>\uff1a\u5f53\u524d\u670d\u52a1\u5668\u81ea\u5df1\u7684ZXID\u3002<\/p>\n

\u6bcf\u6b21\u5bf9\u6536\u5230\u7684\u6295\u7968\u7684\u5904\u7406\uff0c\u90fd\u662f\u5bf9(vote_sid, vote_zxid)\u548c(self_sid, self_zxid)\u5bf9\u6bd4\u7684\u8fc7\u7a0b\u3002<\/p>\n

\u89c4\u5219\u4e00\uff1a\u5982\u679cvote_zxid\u5927\u4e8eself_zxid\uff0c\u5c31\u8ba4\u53ef\u5f53\u524d\u6536\u5230\u7684\u6295\u7968\uff0c\u5e76\u518d\u6b21\u5c06\u8be5\u6295\u7968\u53d1\u9001\u51fa\u53bb\u3002<\/p>\n

\u89c4\u5219\u4e8c\uff1a\u5982\u679cvote_zxid\u5c0f\u4e8eself_zxid\uff0c\u90a3\u4e48\u575a\u6301\u81ea\u5df1\u7684\u6295\u7968\uff0c\u4e0d\u505a\u4efb\u4f55\u53d8\u66f4\u3002<\/p>\n

\u89c4\u5219\u4e09\uff1a\u5982\u679cvote_zxid\u7b49\u4e8eself_zxid\uff0c\u90a3\u4e48\u5c31\u5bf9\u6bd4\u4e24\u8005\u7684SID\uff0c\u5982\u679cvote_sid\u5927\u4e8eself_sid\uff0c\u90a3\u4e48\u5c31\u8ba4\u53ef\u5f53\u524d\u6536\u5230\u7684\u6295\u7968\uff0c\u5e76\u518d\u6b21\u5c06\u8be5\u6295\u7968\u53d1\u9001\u51fa\u53bb\u3002<\/p>\n

\u89c4\u5219\u56db\uff1a\u5982\u679cvote_zxid\u7b49\u4e8eself_zxid\uff0c\u5e76\u4e14vote_sid\u5c0f\u4e8eself_sid\uff0c\u90a3\u4e48\u575a\u6301\u81ea\u5df1\u7684\u6295\u7968\uff0c\u4e0d\u505a\u4efb\u4f55\u53d8\u66f4\u3002<\/p>\n

\u7ed3\u5408\u4e0a\u9762\u89c4\u5219\uff0c\u7ed9\u51fa\u4e0b\u9762\u7684\u96c6\u7fa4\u53d8\u66f4\u8fc7\u7a0b\u3002<\/p>\n

\"\"(3)\u00a0\u786e\u5b9aLeader<\/strong>\u3002\u7ecf\u8fc7\u7b2c\u4e8c\u8f6e\u6295\u7968\u540e\uff0c\u96c6\u7fa4\u4e2d\u7684\u6bcf\u53f0\u673a\u5668\u90fd\u4f1a\u518d\u6b21\u63a5\u6536\u5230\u5176\u4ed6\u673a\u5668\u7684\u6295\u7968\uff0c\u7136\u540e\u5f00\u59cb\u7edf\u8ba1\u6295\u7968\uff0c\u5982\u679c\u4e00\u53f0\u673a\u5668\u6536\u5230\u4e86\u8d85\u8fc7\u534a\u6570\u7684\u76f8\u540c\u6295\u7968\uff0c\u90a3\u4e48\u8fd9\u4e2a\u6295\u7968\u5bf9\u5e94\u7684SID\u673a\u5668\u5373\u4e3aLeader\u3002\u6b64\u65f6Server3\u5c06\u6210\u4e3aLeader\u3002<\/p>\n

\u7531\u4e0a\u9762\u89c4\u5219\u53ef\u77e5\uff0c\u901a\u5e38\u90a3\u53f0\u670d\u52a1\u5668\u4e0a\u7684\u6570\u636e\u8d8a\u65b0\uff08ZXID\u4f1a\u8d8a\u5927\uff09\uff0c\u5176\u6210\u4e3aLeader\u7684\u53ef\u80fd\u6027\u8d8a\u5927\uff0c\u4e5f\u5c31\u8d8a\u80fd\u591f\u4fdd\u8bc1\u6570\u636e\u7684\u6062\u590d\u3002\u5982\u679cZXID\u76f8\u540c\uff0c\u5219SID\u8d8a\u5927\u673a\u4f1a\u8d8a\u5927\u3002<\/p>\n

2.3 Leader\u9009\u4e3e\u5b9e\u73b0\u7ec6\u8282<\/p>\n

1. \u670d\u52a1\u5668\u72b6\u6001<\/p>\n

\u670d\u52a1\u5668\u5177\u6709\u56db\u79cd\u72b6\u6001\uff0c\u5206\u522b\u662fLOOKING\u3001FOLLOWING\u3001LEADING\u3001OBSERVING\u3002<\/p>\n

LOOKING<\/strong>\uff1a\u5bfb\u627eLeader\u72b6\u6001\u3002\u5f53\u670d\u52a1\u5668\u5904\u4e8e\u8be5\u72b6\u6001\u65f6\uff0c\u5b83\u4f1a\u8ba4\u4e3a\u5f53\u524d\u96c6\u7fa4\u4e2d\u6ca1\u6709Leader\uff0c\u56e0\u6b64\u9700\u8981\u8fdb\u5165Leader\u9009\u4e3e\u72b6\u6001\u3002<\/p>\n

FOLLOWING<\/strong>\uff1a\u8ddf\u968f\u8005\u72b6\u6001\u3002\u8868\u660e\u5f53\u524d\u670d\u52a1\u5668\u89d2\u8272\u662fFollower\u3002<\/p>\n

LEADING<\/strong>\uff1a\u9886\u5bfc\u8005\u72b6\u6001\u3002\u8868\u660e\u5f53\u524d\u670d\u52a1\u5668\u89d2\u8272\u662fLeader\u3002<\/p>\n

OBSERVING<\/strong>\uff1a\u89c2\u5bdf\u8005\u72b6\u6001\u3002\u8868\u660e\u5f53\u524d\u670d\u52a1\u5668\u89d2\u8272\u662fObserver\u3002<\/p>\n

2. \u6295\u7968\u6570\u636e\u7ed3\u6784<\/p>\n

\u6bcf\u4e2a\u6295\u7968\u4e2d\u5305\u542b\u4e86\u4e24\u4e2a\u6700\u57fa\u672c\u7684\u4fe1\u606f\uff0c\u6240\u63a8\u4e3e\u670d\u52a1\u5668\u7684SID\u548cZXID\uff0c\u6295\u7968\uff08Vote\uff09\u5728Zookeeper\u4e2d\u5305\u542b\u5b57\u6bb5\u5982\u4e0b<\/p>\n

id<\/strong>\uff1a\u88ab\u63a8\u4e3e\u7684Leader\u7684SID\u3002<\/p>\n

zxid<\/strong>\uff1a\u88ab\u63a8\u4e3e\u7684Leader\u4e8b\u52a1ID\u3002<\/p>\n

electionEpoch<\/strong>\uff1a\u903b\u8f91\u65f6\u949f\uff0c\u7528\u6765\u5224\u65ad\u591a\u4e2a\u6295\u7968\u662f\u5426\u5728\u540c\u4e00\u8f6e\u9009\u4e3e\u5468\u671f\u4e2d\uff0c\u8be5\u503c\u5728\u670d\u52a1\u7aef\u662f\u4e00\u4e2a\u81ea\u589e\u5e8f\u5217\uff0c\u6bcf\u6b21\u8fdb\u5165\u65b0\u4e00\u8f6e\u7684\u6295\u7968\u540e\uff0c\u90fd\u4f1a\u5bf9\u8be5\u503c\u8fdb\u884c\u52a01\u64cd\u4f5c\u3002<\/p>\n

peerEpoch<\/strong>\uff1a\u88ab\u63a8\u4e3e\u7684Leader\u7684epoch\u3002<\/p>\n

state<\/strong>\uff1a\u5f53\u524d\u670d\u52a1\u5668\u7684\u72b6\u6001\u3002<\/p>\n

3. QuorumCnxManager\uff1a\u7f51\u7edcI\/O<\/p>\n

\u6bcf\u53f0\u670d\u52a1\u5668\u5728\u542f\u52a8\u7684\u8fc7\u7a0b\u4e2d\uff0c\u4f1a\u542f\u52a8\u4e00\u4e2aQuorumPeerManager\uff0c\u8d1f\u8d23\u5404\u53f0\u670d\u52a1\u5668\u4e4b\u95f4\u7684\u5e95\u5c42Leader\u9009\u4e3e\u8fc7\u7a0b\u4e2d\u7684\u7f51\u7edc\u901a\u4fe1\u3002<\/p>\n

(1)\u00a0\u6d88\u606f\u961f\u5217<\/strong>\u3002QuorumCnxManager\u5185\u90e8\u7ef4\u62a4\u4e86\u4e00\u7cfb\u5217\u7684\u961f\u5217\uff0c\u7528\u6765\u4fdd\u5b58\u63a5\u6536\u5230\u7684\u3001\u5f85\u53d1\u9001\u7684\u6d88\u606f\u4ee5\u53ca\u6d88\u606f\u7684\u53d1\u9001\u5668\uff0c\u9664\u63a5\u6536\u961f\u5217\u4ee5\u5916\uff0c\u5176\u4ed6\u961f\u5217\u90fd\u6309\u7167SID\u5206\u7ec4\u5f62\u6210\u961f\u5217\u96c6\u5408\uff0c\u5982\u4e00\u4e2a\u96c6\u7fa4\u4e2d\u9664\u4e86\u81ea\u8eab\u8fd8\u67093\u53f0\u673a\u5668\uff0c\u90a3\u4e48\u5c31\u4f1a\u4e3a\u8fd93\u53f0\u673a\u5668\u5206\u522b\u521b\u5efa\u4e00\u4e2a\u53d1\u9001\u961f\u5217\uff0c\u4e92\u4e0d\u5e72\u6270\u3002<\/p>\n

\u00b7 recvQueue<\/strong>\uff1a\u6d88\u606f\u63a5\u6536\u961f\u5217\uff0c\u7528\u4e8e\u5b58\u653e\u90a3\u4e9b\u4ece\u5176\u4ed6\u670d\u52a1\u5668\u63a5\u6536\u5230\u7684\u6d88\u606f\u3002<\/p>\n

\u00b7 queueSendMap<\/strong>\uff1a\u6d88\u606f\u53d1\u9001\u961f\u5217\uff0c\u7528\u4e8e\u4fdd\u5b58\u90a3\u4e9b\u5f85\u53d1\u9001\u7684\u6d88\u606f\uff0c\u6309\u7167SID\u8fdb\u884c\u5206\u7ec4\u3002<\/p>\n

\u00b7 senderWorkerMap<\/strong>\uff1a\u53d1\u9001\u5668\u96c6\u5408\uff0c\u6bcf\u4e2aSenderWorker\u6d88\u606f\u53d1\u9001\u5668\uff0c\u90fd\u5bf9\u5e94\u4e00\u53f0\u8fdc\u7a0bZookeeper\u670d\u52a1\u5668\uff0c\u8d1f\u8d23\u6d88\u606f\u7684\u53d1\u9001\uff0c\u4e5f\u6309\u7167SID\u8fdb\u884c\u5206\u7ec4\u3002<\/p>\n

\u00b7 lastMessageSent<\/strong>\uff1a\u6700\u8fd1\u53d1\u9001\u8fc7\u7684\u6d88\u606f\uff0c\u4e3a\u6bcf\u4e2aSID\u4fdd\u7559\u6700\u8fd1\u53d1\u9001\u8fc7\u7684\u4e00\u4e2a\u6d88\u606f\u3002<\/p>\n

(2)\u00a0\u5efa\u7acb\u8fde\u63a5<\/strong>\u3002\u4e3a\u4e86\u80fd\u591f\u76f8\u4e92\u6295\u7968\uff0cZookeeper\u96c6\u7fa4\u4e2d\u7684\u6240\u6709\u673a\u5668\u90fd\u9700\u8981\u4e24\u4e24\u5efa\u7acb\u8d77\u7f51\u7edc\u8fde\u63a5\u3002QuorumCnxManager\u5728\u542f\u52a8\u65f6\u4f1a\u521b\u5efa\u4e00\u4e2aServerSocket\u6765\u76d1\u542cLeader\u9009\u4e3e\u7684\u901a\u4fe1\u7aef\u53e3(\u9ed8\u8ba4\u4e3a3888)\u3002\u5f00\u542f\u76d1\u542c\u540e\uff0cZookeeper\u80fd\u591f\u4e0d\u65ad\u5730\u63a5\u6536\u5230\u6765\u81ea\u5176\u4ed6\u670d\u52a1\u5668\u7684\u521b\u5efa\u8fde\u63a5\u8bf7\u6c42\uff0c\u5728\u63a5\u6536\u5230\u5176\u4ed6\u670d\u52a1\u5668\u7684TCP\u8fde\u63a5\u8bf7\u6c42\u65f6\uff0c\u4f1a\u8fdb\u884c\u5904\u7406\u3002\u4e3a\u4e86\u907f\u514d\u4e24\u53f0\u673a\u5668\u4e4b\u95f4\u91cd\u590d\u5730\u521b\u5efaTCP\u8fde\u63a5\uff0cZookeeper\u53ea\u5141\u8bb8SID\u5927\u7684\u670d\u52a1\u5668\u4e3b\u52a8\u548c\u5176\u4ed6\u673a\u5668\u5efa\u7acb\u8fde\u63a5\uff0c\u5426\u5219\u65ad\u5f00\u8fde\u63a5\u3002\u5728\u63a5\u6536\u5230\u521b\u5efa\u8fde\u63a5\u8bf7\u6c42\u540e\uff0c\u670d\u52a1\u5668\u901a\u8fc7\u5bf9\u6bd4\u81ea\u5df1\u548c\u8fdc\u7a0b\u670d\u52a1\u5668\u7684SID\u503c\u6765\u5224\u65ad\u662f\u5426\u63a5\u6536\u8fde\u63a5\u8bf7\u6c42\uff0c\u5982\u679c\u5f53\u524d\u670d\u52a1\u5668\u53d1\u73b0\u81ea\u5df1\u7684SID\u66f4\u5927\uff0c\u90a3\u4e48\u4f1a\u65ad\u5f00\u5f53\u524d\u8fde\u63a5\uff0c\u7136\u540e\u81ea\u5df1\u4e3b\u52a8\u548c\u8fdc\u7a0b\u670d\u52a1\u5668\u5efa\u7acb\u8fde\u63a5\u3002\u4e00\u65e6\u8fde\u63a5\u5efa\u7acb\uff0c\u5c31\u4f1a\u6839\u636e\u8fdc\u7a0b\u670d\u52a1\u5668\u7684SID\u6765\u521b\u5efa\u76f8\u5e94\u7684\u6d88\u606f\u53d1\u9001\u5668SendWorker\u548c\u6d88\u606f\u63a5\u6536\u5668RecvWorker\uff0c\u5e76\u542f\u52a8\u3002<\/p>\n

(3)\u00a0\u6d88\u606f\u63a5\u6536\u4e0e\u53d1\u9001<\/strong>\u3002\u6d88\u606f\u63a5\u6536<\/strong>\uff1a\u7531\u6d88\u606f\u63a5\u6536\u5668RecvWorker\u8d1f\u8d23\uff0c\u7531\u4e8eZookeeper\u4e3a\u6bcf\u4e2a\u8fdc\u7a0b\u670d\u52a1\u5668\u90fd\u5206\u914d\u4e00\u4e2a\u5355\u72ec\u7684RecvWorker\uff0c\u56e0\u6b64\uff0c\u6bcf\u4e2aRecvWorker\u53ea\u9700\u8981\u4e0d\u65ad\u5730\u4ece\u8fd9\u4e2aTCP\u8fde\u63a5\u4e2d\u8bfb\u53d6\u6d88\u606f\uff0c\u5e76\u5c06\u5176\u4fdd\u5b58\u5230recvQueue\u961f\u5217\u4e2d\u3002\u6d88\u606f\u53d1\u9001<\/strong>\uff1a\u7531\u4e8eZookeeper\u4e3a\u6bcf\u4e2a\u8fdc\u7a0b\u670d\u52a1\u5668\u90fd\u5206\u914d\u4e00\u4e2a\u5355\u72ec\u7684SendWorker\uff0c\u56e0\u6b64\uff0c\u6bcf\u4e2aSendWorker\u53ea\u9700\u8981\u4e0d\u65ad\u5730\u4ece\u5bf9\u5e94\u7684\u6d88\u606f\u53d1\u9001\u961f\u5217\u4e2d\u83b7\u53d6\u51fa\u4e00\u4e2a\u6d88\u606f\u53d1\u9001\u5373\u53ef\uff0c\u540c\u65f6\u5c06\u8fd9\u4e2a\u6d88\u606f\u653e\u5165lastMessageSent\u4e2d\u3002\u5728SendWorker\u4e2d\uff0c\u4e00\u65e6Zookeeper\u53d1\u73b0\u9488\u5bf9\u5f53\u524d\u670d\u52a1\u5668\u7684\u6d88\u606f\u53d1\u9001\u961f\u5217\u4e3a\u7a7a\uff0c\u90a3\u4e48\u6b64\u65f6\u9700\u8981\u4ecelastMessageSent\u4e2d\u53d6\u51fa\u4e00\u4e2a\u6700\u8fd1\u53d1\u9001\u8fc7\u7684\u6d88\u606f\u6765\u8fdb\u884c\u518d\u6b21\u53d1\u9001\uff0c\u8fd9\u662f\u4e3a\u4e86\u89e3\u51b3\u63a5\u6536\u65b9\u5728\u6d88\u606f\u63a5\u6536\u524d\u6216\u8005\u63a5\u6536\u5230\u6d88\u606f\u540e\u670d\u52a1\u5668\u6302\u4e86\uff0c\u5bfc\u81f4\u6d88\u606f\u5c1a\u672a\u88ab\u6b63\u786e\u5904\u7406\u3002\u540c\u65f6\uff0cZookeeper\u80fd\u591f\u4fdd\u8bc1\u63a5\u6536\u65b9\u5728\u5904\u7406\u6d88\u606f\u65f6\uff0c\u4f1a\u5bf9\u91cd\u590d\u6d88\u606f\u8fdb\u884c\u6b63\u786e\u7684\u5904\u7406\u3002<\/p>\n

4. FastLeaderElection\uff1a\u9009\u4e3e\u7b97\u6cd5\u6838\u5fc3<\/p>\n

\u00b7 \u5916\u90e8\u6295\u7968<\/strong>\uff1a\u7279\u6307\u5176\u4ed6\u670d\u52a1\u5668\u53d1\u6765\u7684\u6295\u7968\u3002<\/p>\n

\u00b7 \u5185\u90e8\u6295\u7968<\/strong>\uff1a\u670d\u52a1\u5668\u81ea\u8eab\u5f53\u524d\u7684\u6295\u7968\u3002<\/p>\n

\u00b7 \u9009\u4e3e\u8f6e\u6b21<\/strong>\uff1aZookeeper\u670d\u52a1\u5668Leader\u9009\u4e3e\u7684\u8f6e\u6b21\uff0c\u5373logicalclock\u3002<\/p>\n

\u00b7 PK<\/strong>\uff1a\u5bf9\u5185\u90e8\u6295\u7968\u548c\u5916\u90e8\u6295\u7968\u8fdb\u884c\u5bf9\u6bd4\u6765\u786e\u5b9a\u662f\u5426\u9700\u8981\u53d8\u66f4\u5185\u90e8\u6295\u7968\u3002<\/p>\n

(1) \u9009\u7968\u7ba1\u7406<\/p>\n

\u00b7 sendqueue<\/strong>\uff1a\u9009\u7968\u53d1\u9001\u961f\u5217\uff0c\u7528\u4e8e\u4fdd\u5b58\u5f85\u53d1\u9001\u7684\u9009\u7968\u3002<\/p>\n

\u00b7 recvqueue<\/strong>\uff1a\u9009\u7968\u63a5\u6536\u961f\u5217\uff0c\u7528\u4e8e\u4fdd\u5b58\u63a5\u6536\u5230\u7684\u5916\u90e8\u6295\u7968\u3002<\/p>\n

\u00b7 WorkerReceiver<\/strong>\uff1a\u9009\u7968\u63a5\u6536\u5668\u3002\u5176\u4f1a\u4e0d\u65ad\u5730\u4eceQuorumCnxManager\u4e2d\u83b7\u53d6\u5176\u4ed6\u670d\u52a1\u5668\u53d1\u6765\u7684\u9009\u4e3e\u6d88\u606f\uff0c\u5e76\u5c06\u5176\u8f6c\u6362\u6210\u4e00\u4e2a\u9009\u7968\uff0c\u7136\u540e\u4fdd\u5b58\u5230recvqueue\u4e2d\uff0c\u5728\u9009\u7968\u63a5\u6536\u8fc7\u7a0b\u4e2d\uff0c\u5982\u679c\u53d1\u73b0\u8be5\u5916\u90e8\u9009\u7968\u7684\u9009\u4e3e\u8f6e\u6b21\u5c0f\u4e8e\u5f53\u524d\u670d\u52a1\u5668\u7684\uff0c\u90a3\u4e48\u5ffd\u7565\u8be5\u5916\u90e8\u6295\u7968\uff0c\u540c\u65f6\u7acb\u5373\u53d1\u9001\u81ea\u5df1\u7684\u5185\u90e8\u6295\u7968\u3002<\/p>\n

\u00b7 WorkerSender<\/strong>\uff1a\u9009\u7968\u53d1\u9001\u5668\uff0c\u4e0d\u65ad\u5730\u4ecesendqueue\u4e2d\u83b7\u53d6\u5f85\u53d1\u9001\u7684\u9009\u7968\uff0c\u5e76\u5c06\u5176\u4f20\u9012\u5230\u5e95\u5c42QuorumCnxManager\u4e2d\u3002<\/p>\n

(2) \u7b97\u6cd5\u6838\u5fc3<\/p>\n

\"\"\u4e0a\u56fe\u5c55\u793a\u4e86FastLeaderElection\u6a21\u5757\u662f\u5982\u4f55\u4e0e\u5e95\u5c42\u7f51\u7edcI\/O\u8fdb\u884c\u4ea4\u4e92\u7684\u3002Leader\u9009\u4e3e\u7684\u57fa\u672c\u6d41\u7a0b\u5982\u4e0b<\/p>\n

1.\u00a0\u81ea\u589e\u9009\u4e3e\u8f6e\u6b21<\/strong>\u3002Zookeeper\u89c4\u5b9a\u6240\u6709\u6709\u6548\u7684\u6295\u7968\u90fd\u5fc5\u987b\u5728\u540c\u4e00\u8f6e\u6b21\u4e2d\uff0c\u5728\u5f00\u59cb\u65b0\u4e00\u8f6e\u6295\u7968\u65f6\uff0c\u4f1a\u9996\u5148\u5bf9logicalclock\u8fdb\u884c\u81ea\u589e\u64cd\u4f5c\u3002<\/p>\n

2.\u00a0\u521d\u59cb\u5316\u9009\u7968<\/strong>\u3002\u5728\u5f00\u59cb\u8fdb\u884c\u65b0\u4e00\u8f6e\u6295\u7968\u4e4b\u524d\uff0c\u6bcf\u4e2a\u670d\u52a1\u5668\u90fd\u4f1a\u521d\u59cb\u5316\u81ea\u8eab\u7684\u9009\u7968\uff0c\u5e76\u4e14\u5728\u521d\u59cb\u5316\u9636\u6bb5\uff0c\u6bcf\u53f0\u670d\u52a1\u5668\u90fd\u4f1a\u5c06\u81ea\u5df1\u63a8\u4e3e\u4e3aLeader\u3002<\/p>\n

3.\u00a0\u53d1\u9001\u521d\u59cb\u5316\u9009\u7968<\/strong>\u3002\u5b8c\u6210\u9009\u7968\u7684\u521d\u59cb\u5316\u540e\uff0c\u670d\u52a1\u5668\u5c31\u4f1a\u53d1\u8d77\u7b2c\u4e00\u6b21\u6295\u7968\u3002Zookeeper\u4f1a\u5c06\u521a\u521a\u521d\u59cb\u5316\u597d\u7684\u9009\u7968\u653e\u5165sendqueue\u4e2d\uff0c\u7531\u53d1\u9001\u5668WorkerSender\u8d1f\u8d23\u53d1\u9001\u51fa\u53bb\u3002<\/p>\n

4.\u00a0\u63a5\u6536\u5916\u90e8\u6295\u7968<\/strong>\u3002\u6bcf\u53f0\u670d\u52a1\u5668\u4f1a\u4e0d\u65ad\u5730\u4ecerecvqueue\u961f\u5217\u4e2d\u83b7\u53d6\u5916\u90e8\u9009\u7968\u3002\u5982\u679c\u670d\u52a1\u5668\u53d1\u73b0\u65e0\u6cd5\u83b7\u53d6\u5230\u4efb\u4f55\u5916\u90e8\u6295\u7968\uff0c\u90a3\u4e48\u5c31\u4f1a\u7acb\u5373\u786e\u8ba4\u81ea\u5df1\u662f\u5426\u548c\u96c6\u7fa4\u4e2d\u5176\u4ed6\u670d\u52a1\u5668\u4fdd\u6301\u7740\u6709\u6548\u7684\u8fde\u63a5\uff0c\u5982\u679c\u6ca1\u6709\u8fde\u63a5\uff0c\u5219\u9a6c\u4e0a\u5efa\u7acb\u8fde\u63a5\uff0c\u5982\u679c\u5df2\u7ecf\u5efa\u7acb\u4e86\u8fde\u63a5\uff0c\u5219\u518d\u6b21\u53d1\u9001\u81ea\u5df1\u5f53\u524d\u7684\u5185\u90e8\u6295\u7968\u3002<\/p>\n

5.\u00a0\u5224\u65ad\u9009\u4e3e\u8f6e\u6b21<\/strong>\u3002\u5728\u53d1\u9001\u5b8c\u521d\u59cb\u5316\u9009\u7968\u4e4b\u540e\uff0c\u63a5\u7740\u5f00\u59cb\u5904\u7406\u5916\u90e8\u6295\u7968\u3002\u5728\u5904\u7406\u5916\u90e8\u6295\u7968\u65f6\uff0c\u4f1a\u6839\u636e\u9009\u4e3e\u8f6e\u6b21\u6765\u8fdb\u884c\u4e0d\u540c\u7684\u5904\u7406\u3002<\/p>\n

\u00b7 \u5916\u90e8\u6295\u7968\u7684\u9009\u4e3e\u8f6e\u6b21\u5927\u4e8e\u5185\u90e8\u6295\u7968<\/strong>\u3002\u82e5\u670d\u52a1\u5668\u81ea\u8eab\u7684\u9009\u4e3e\u8f6e\u6b21\u843d\u540e\u4e8e\u8be5\u5916\u90e8\u6295\u7968\u5bf9\u5e94\u670d\u52a1\u5668\u7684\u9009\u4e3e\u8f6e\u6b21\uff0c\u90a3\u4e48\u5c31\u4f1a\u7acb\u5373\u66f4\u65b0\u81ea\u5df1\u7684\u9009\u4e3e\u8f6e\u6b21(logicalclock)\uff0c\u5e76\u4e14\u6e05\u7a7a\u6240\u6709\u5df2\u7ecf\u6536\u5230\u7684\u6295\u7968\uff0c\u7136\u540e\u4f7f\u7528\u521d\u59cb\u5316\u7684\u6295\u7968\u6765\u8fdb\u884cPK\u4ee5\u786e\u5b9a\u662f\u5426\u53d8\u66f4\u5185\u90e8\u6295\u7968\u3002\u6700\u7ec8\u518d\u5c06\u5185\u90e8\u6295\u7968\u53d1\u9001\u51fa\u53bb\u3002<\/p>\n

\u00b7 \u5916\u90e8\u6295\u7968\u7684\u9009\u4e3e\u8f6e\u6b21\u5c0f\u4e8e\u5185\u90e8\u6295<\/strong>\u7968<\/strong>\u3002\u82e5\u670d\u52a1\u5668\u63a5\u6536\u7684\u5916\u9009\u7968\u7684\u9009\u4e3e\u8f6e\u6b21\u843d\u540e\u4e8e\u81ea\u8eab\u7684\u9009\u4e3e\u8f6e\u6b21\uff0c\u90a3\u4e48Zookeeper\u5c31\u4f1a\u76f4\u63a5\u5ffd\u7565\u8be5\u5916\u90e8\u6295\u7968\uff0c\u4e0d\u505a\u4efb\u4f55\u5904\u7406\uff0c\u5e76\u8fd4\u56de\u6b65\u9aa44\u3002<\/p>\n

\u00b7 \u5916\u90e8\u6295\u7968\u7684\u9009\u4e3e\u8f6e\u6b21\u7b49\u4e8e\u5185\u90e8\u6295\u7968<\/strong>\u3002\u6b64\u65f6\u53ef\u4ee5\u5f00\u59cb\u8fdb\u884c\u9009\u7968PK\u3002<\/p>\n

6.\u00a0\u9009\u7968PK<\/strong>\u3002\u5728\u8fdb\u884c\u9009\u7968PK\u65f6\uff0c\u7b26\u5408\u4efb\u610f\u4e00\u4e2a\u6761\u4ef6\u5c31\u9700\u8981\u53d8\u66f4\u6295\u7968\u3002<\/p>\n

\u00b7 \u82e5\u5916\u90e8\u6295\u7968\u4e2d\u63a8\u4e3e\u7684Leader\u670d\u52a1\u5668\u7684\u9009\u4e3e\u8f6e\u6b21\u5927\u4e8e\u5185\u90e8\u6295\u7968\uff0c\u90a3\u4e48\u9700\u8981\u53d8\u66f4\u6295\u7968\u3002<\/p>\n

\u00b7 \u82e5\u9009\u4e3e\u8f6e\u6b21\u4e00\u81f4\uff0c\u90a3\u4e48\u5c31\u5bf9\u6bd4\u4e24\u8005\u7684ZXID\uff0c\u82e5\u5916\u90e8\u6295\u7968\u7684ZXID\u5927\uff0c\u90a3\u4e48\u9700\u8981\u53d8\u66f4\u6295\u7968\u3002<\/p>\n

\u00b7 \u82e5\u4e24\u8005\u7684ZXID\u4e00\u81f4\uff0c\u90a3\u4e48\u5c31\u5bf9\u6bd4\u4e24\u8005\u7684SID\uff0c\u82e5\u5916\u90e8\u6295\u7968\u7684SID\u5927\uff0c\u90a3\u4e48\u5c31\u9700\u8981\u53d8\u66f4\u6295\u7968\u3002<\/p>\n

7.\u00a0\u53d8\u66f4\u6295\u7968<\/strong>\u3002\u7ecf\u8fc7PK\u540e\uff0c\u82e5\u786e\u5b9a\u4e86\u5916\u90e8\u6295\u7968\u4f18\u4e8e\u5185\u90e8\u6295\u7968\uff0c\u90a3\u4e48\u5c31\u53d8\u66f4\u6295\u7968\uff0c\u5373\u4f7f\u7528\u5916\u90e8\u6295\u7968\u7684\u9009\u7968\u4fe1\u606f\u6765\u8986\u76d6\u5185\u90e8\u6295\u7968\uff0c\u53d8\u66f4\u5b8c\u6210\u540e\uff0c\u518d\u6b21\u5c06\u8fd9\u4e2a\u53d8\u66f4\u540e\u7684\u5185\u90e8\u6295\u7968\u53d1\u9001\u51fa\u53bb\u3002<\/p>\n

8.\u00a0\u9009\u7968\u5f52\u6863<\/strong>\u3002\u65e0\u8bba\u662f\u5426\u53d8\u66f4\u4e86\u6295\u7968\uff0c\u90fd\u4f1a\u5c06\u521a\u521a\u6536\u5230\u7684\u90a3\u4efd\u5916\u90e8\u6295\u7968\u653e\u5165\u9009\u7968\u96c6\u5408recvset\u4e2d\u8fdb\u884c\u5f52\u6863\u3002recvset\u7528\u4e8e\u8bb0\u5f55\u5f53\u524d\u670d\u52a1\u5668\u5728\u672c\u8f6e\u6b21\u7684Leader\u9009\u4e3e\u4e2d\u6536\u5230\u7684\u6240\u6709\u5916\u90e8\u6295\u7968\uff08\u6309\u7167\u670d\u52a1\u961f\u7684SID\u533a\u522b\uff0c\u5982{(1, vote1), (2, vote2)…}\uff09\u3002<\/p>\n

9.\u00a0\u7edf\u8ba1\u6295\u7968<\/strong>\u3002\u5b8c\u6210\u9009\u7968\u5f52\u6863\u540e\uff0c\u5c31\u53ef\u4ee5\u5f00\u59cb\u7edf\u8ba1\u6295\u7968\uff0c\u7edf\u8ba1\u6295\u7968\u662f\u4e3a\u4e86\u7edf\u8ba1\u96c6\u7fa4\u4e2d\u662f\u5426\u5df2\u7ecf\u6709\u8fc7\u534a\u7684\u670d\u52a1\u5668\u8ba4\u53ef\u4e86\u5f53\u524d\u7684\u5185\u90e8\u6295\u7968\uff0c\u5982\u679c\u786e\u5b9a\u5df2\u7ecf\u6709\u8fc7\u534a\u670d\u52a1\u5668\u8ba4\u53ef\u4e86\u8be5\u6295\u7968\uff0c\u5219\u7ec8\u6b62\u6295\u7968\u3002\u5426\u5219\u8fd4\u56de\u6b65\u9aa44\u3002<\/p>\n

10.\u00a0\u66f4\u65b0\u670d\u52a1\u5668\u72b6\u6001<\/strong>\u3002\u82e5\u5df2\u7ecf\u786e\u5b9a\u53ef\u4ee5\u7ec8\u6b62\u6295\u7968\uff0c\u90a3\u4e48\u5c31\u5f00\u59cb\u66f4\u65b0\u670d\u52a1\u5668\u72b6\u6001\uff0c\u670d\u52a1\u5668\u9996\u9009\u5224\u65ad\u5f53\u524d\u88ab\u8fc7\u534a\u670d\u52a1\u5668\u8ba4\u53ef\u7684\u6295\u7968\u6240\u5bf9\u5e94\u7684Leader\u670d\u52a1\u5668\u662f\u5426\u662f\u81ea\u5df1\uff0c\u82e5\u662f\u81ea\u5df1\uff0c\u5219\u5c06\u81ea\u5df1\u7684\u670d\u52a1\u5668\u72b6\u6001\u66f4\u65b0\u4e3aLEADING\uff0c\u82e5\u4e0d\u662f\uff0c\u5219\u6839\u636e\u5177\u4f53\u60c5\u51b5\u6765\u786e\u5b9a\u81ea\u5df1\u662fFOLLOWING\u6216\u662fOBSERVING\u3002<\/p>\n

\u4ee5\u4e0a10\u4e2a\u6b65\u9aa4\u5c31\u662fFastLeaderElection\u7684\u6838\u5fc3\uff0c\u5176\u4e2d\u6b65\u9aa44-9\u4f1a\u7ecf\u8fc7\u51e0\u8f6e\u5faa\u73af\uff0c\u76f4\u5230\u6709Leader\u9009\u4e3e\u4ea7\u751f\u3002<\/p>\n

\u4e09\u3001\u603b\u7ed3<\/strong><\/p>\n

\u7ecf\u8fc7\u672c\u7bc7\u535a\u6587\u7684\u5b66\u4e60\uff0c\u4e86\u89e3\u4e86Leader\u9009\u4e3e\u7684\u5177\u4f53\u7ec6\u8282\uff0c\u8fd9\u5bf9\u4e8e\u4e4b\u540e\u7684\u4ee3\u7801\u5206\u6790\u4f1a\u6253\u4e0b\u5f88\u597d\u7684\u57fa\u7840\u3002\u4e5f\u8c22\u8c22\u5404\u4f4d\u56ed\u53cb\u7684\u89c2\u770b~<\/p>\n","protected":false},"excerpt":{"rendered":"

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