{"id":224799,"date":"2014-10-03T01:53:59","date_gmt":"2014-10-02T17:53:59","guid":{"rendered":"http:\/\/yangzhe1991.org\/blog\/?p=224799"},"modified":"2014-10-03T14:09:57","modified_gmt":"2014-10-03T06:09:57","slug":"first-time-to-contribute-cassandra","status":"publish","type":"post","link":"https:\/\/yangzhe1991.org\/blog\/2014\/10\/first-time-to-contribute-cassandra\/","title":{"rendered":"\u7eaa\u5ff5\u7b2c\u4e00\u6b21\u7ed9Cassandra\u8d21\u732e\u4ee3\u7801"},"content":{"rendered":"<p>\u4e4b\u524d\u5728github\u4e0a\u5012\u662f\u7ed9\u4e00\u4e9b\u5f00\u6e90\u7684\u5e93\u63d0\u4ea4\u8fc7\u4ee3\u7801\uff0c\u4f46\u7528\u7684\u4eba\u4e00\u822c\u4e5f\u4e0d\u591a\u3002\u8fd9\u6b21\u5e94\u8be5\u7b97\u771f\u6b63\u610f\u4e49\u4e0a\u7684\u201c\u4e3a\u5f00\u6e90\u9879\u76ee\u8d21\u732e\u4ee3\u7801\u201d\u3002\u6240\u4ee5\u5199\u7bc7\u6587\u7ae0\u7eaa\u5ff5\u4e0b\u2026\u2026<\/p>\n<p><!--more--><\/p>\n<p>\u8d77\u56e0\u662f\u6211\u4e0a\u5468\u628a\u6211\u4eec\u516c\u53f8\u7684cassandra\u96c6\u7fa4\u5347\u7ea7\u52302.1.0\u4e86\u3002\u867d\u7136\u7406\u8bba\u4e0a\u5927\u7248\u672c\u7684\u7b2c\u4e00\u4e2a\u6b63\u5f0f\u7248\u5751\u53ef\u80fd\u4e0d\u5c11\uff0c\u8981\u51e0\u4e2a\u5c0f\u7248\u672c\u5347\u7ea7\u540e\u624d\u9760\u8c31\uff0c\u4f46\u8fd9\u6b212.1\u641e\u4e86N\u4e2abeta\u548crc\uff0c\u611f\u89c9\u8fd8\u662f\u9760\u8c31\u7684\u3002\u52a0\u4e0a\u53f7\u79f0\u6027\u80fd\u63d0\u5347\uff0c\u5bf9\u6574\u5929\u56e0\u4e3a\u673a\u5668\u592a\u6413\u625b\u4e0d\u4f4f\u538b\u529b\u4e4b\u7c7b\u7684\u4ffa\u4eec\u516c\u53f8\u8fd8\u662f\u633a\u6709\u5438\u5f15\u529b\u7684\u3002\u4e8e\u662f\u5c31\u5347\u7ea7\u4e86\u3002\u5347\u7ea7\u5b8c\u5012\u662f\u6ca1\u89c9\u5f97\u6027\u80fd\u63d0\u5347\uff0c\u4f46\u53d1\u73b0log\u91cc\u7ecf\u5e38\u6709AssertionError\u3002\u770b\u4e86\u4e0b\u662f\u53d1\u73b0\u4e0d\u540c\u8282\u70b9\u6570\u636e\u4e0d\u4e00\u81f4\u7684\u65f6\u5019\u5224\u65ad\u6bcf\u4e2a\u8282\u70b9\u4e0e\u6700\u65b0\u6570\u636e\u7684\u5dee\u5f02\uff08\u628a\u5dee\u5f02\u90e8\u5206\u5199\u5230\u5bf9\u5e94\u8282\u70b9\u4ece\u800c\u4fdd\u6301\u6570\u636e\u4e00\u81f4\u6027\uff09\u7684\u4ee3\u7801\u7684\u4e00\u4e2aassert\u6302\u4e86\u3002\u6ca1\u65f6\u95f4\u7ec6\u770b\u5c31\u590d\u5236\u7c98\u8d34\u5f02\u5e38\u4fe1\u606f\u53d1JIRA\u4e0a\u548cmaillist\u91cc\uff0c\u53d1\u4e863\u5929\u6ca1\u4eba\u7406\u2026\u2026<\/p>\n<p>\u7136\u540e\u8fd9\u51e0\u5929\u4e0d\u4e0a\u73ed\u4e86\u5c31\u770b\u4e86\u4e0b\u5177\u4f53\u7684\u4ee3\u7801\uff0c\u662f\u5728\u6bd4\u8f83\u4e00\u4e2a\u8282\u70b9\u7684\u5bf9\u5e94row\u7684RangeTombstoneList\u548c\u6240\u6709\u8282\u70b9\u5408\u5e76\u540e\u7684\u6700\u65b0\u72b6\u6001\uff08\u56e0\u4e3a\u4f20\u8f93\u4e0d\u6210\u529f\u3001\u4e22\u6570\u636e\u7b49\u5bfc\u81f4\u67d0\u4e2a\u8282\u70b9\u7684\u6570\u636e\u5e76\u4e0d\u662f\u6700\u65b0\u7684\uff0c\u628a\u5bf9\u5e94\u7684row\u5728\u6bcf\u4e2a\u8282\u70b9\u4e0a\u7684\u5404\u79cd\u72b6\u6001\u6309\u65f6\u95f4\u6233\u6328\u4e2a\u627e\u6700\u5927\u5c31\u662f\u4e00\u4e2arow\u771f\u6b63\u7684\u6700\u65b0\u72b6\u6001\uff0c\u5f53\u8bfb\u53d6\u6570\u636e\u7684\u65f6\u5019\u53d1\u73b0\u67d0\u4e2a\u8282\u70b9\u4e0e\u6700\u65b0\u72b6\u6001\u4e0d\u4e00\u81f4\u7684\u65f6\u5019\u8981\u628a\u9700\u8981\u66f4\u65b0\u7684\u90e8\u5206\u627e\u5230\u7136\u540e\u4f20\u7ed9\u5bf9\u5e94\u8282\u70b9\uff09\u7684RangeTombstoneList\u7684diff\u65f6\u6302\u7684\u3002\u5199diff\u51fd\u6570\u7684\u4eba\u8ba4\u4e3a\u5355\u4e2a\u8282\u70b9\u7684TombstoneList\u957f\u5ea6\u5e94\u8be5\u5c0f\u4e8e\u5168\u5c40\u6700\u65b0\u72b6\u6001\u7684TombstoneList\u957f\u5ea6\uff0c\u56e0\u4e3a\u540e\u8005\u662f\u7531\u6bcf\u4e2a\u8282\u70b9\u5408\u5e76\u800c\u6765\u7684\u3002\u6240\u4ee5\u8fd9\u91cc\u4e0a\u6765\u5148\u6765\u4e2aassert\u786e\u4fddsize\u662f&lt;=\u7684\u5173\u7cfb\u3002<\/p>\n<p>\u4f46\u5b9e\u9645\u4e0a\u6bcf\u4e2a\u8282\u70b9\u7684RangeTombstoneList\u5408\u5e76\u540e\u7684List\u957f\u5ea6\u662f\u53ef\u80fd\u5c0f\u4e8e\u67d0\u4e2a\u8282\u70b9\u7684\u957f\u5ea6\u7684\uff0c\u6bd4\u5982\u8282\u70b9A\u8bb0\u5f55\u67d0\u884c\u6570\u636ecolumn\u4ece1\u52303\u5728\u65f6\u95f4\u6233\u4e3aT1\u7684\u65f6\u5019\u5220\u9664\u2014\u2014\u8bb0\u505a[1,4]@1\uff0c\u5de6\u95ed\u53f3\u5f00\u533a\u95f4\uff0c\u53c8\u8bb0\u5f55\u53e6\u4e00\u6761\u5220\u9664\u8bb0\u5f55\u662f[4,5]@2\uff1b\u800c\u8282\u70b9B\u8bb0\u5f55\u7684\u662f[1,5]@3\uff0c\u90a3\u4e48\u4e09\u8005\u5408\u5e76\u7684RangeTombstoneList\u5176\u5b9e\u5c31\u662f[1,5)@3\uff0csize\u662f1\u3002\u800c\u8282\u70b9A\u7684list 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