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\u6027\u80fd\u548c\u5bff\u547d\u517c\u5f97<\/b><\/p>\n

ROW (Redirect on write)\u8ffd\u52a0\u5199<\/b><\/p>\n

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\n

\"ROW\u8ffd\u52a0\u5199\"<\/a>
ROW\u8ffd\u52a0\u5199<\/span><\/p>\n<\/p><\/div>\n

\u5168\u5c40\u5783\u573e\u56de\u6536<\/b><\/p>\n

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\u6d6a\u6f6e\u4fe1\u606f\u96c6\u4e2d\u5f0f\u5b58\u50a8\u5168\u95ea\u6808\u91c7\u7528\u521b\u65b0\u7684\u5168\u5c40\u5783\u573e\u56de\u6536\u7b97\u6cd5\uff0c\u5168\u5c40\u5b9e\u65f6\u76d1\u6d4b\u5df2\u7528\u5355\u4f4d\u7a7a\u95f4\u4e2d\u7684\u65e0\u6548\u6570\u636e\u542b\u91cf\u3001\u6709\u6548\u6570\u636e\u6743\u91cd\uff08\u51b7\u70ed\u7a0b\u5ea6\u7b49\uff09\uff0c\u5168\u5c40\u67e5\u627e\u65e0\u6548\u6570\u636e\u66f4\u591a\u3001\u6709\u6548\u6570\u636e\u66f4\u51b7\u7684\u7a7a\u95f4\u8fdb\u884c\u56de\u6536\uff0c\u51cf\u5c11\u7a7a\u95f4\u56de\u6536\u65f6\u7684\u642c\u8fc1\u6570\u636e\u91cf\uff0c\u964d\u4f4e\u8fc1\u79fb\u6570\u636e\u77ed\u65f6\u95f4\u53d8\u4e3a\u5783\u573e\u6570\u636e\u7684\u6982\u7387\u3002\u540c\u65f6\uff0c\u6839\u636e\u6570\u636e\u51b7\u70ed\u7a0b\u5ea6\u9884\u5224\uff0c\u5c06\u5143\u6570\u636e\u3001\u65b0\u5199\u7684\u6570\u636e\u548cGC\u642c\u8fc1\u7684\u6570\u636e\u533a\u5206\u5b58\u653e\uff0c\u4ece\u800c\u63d0\u9ad8\u5783\u573e\u56de\u6536\u6548\u7387\uff0c\u964d\u4f4e\u5bf9\u7cfb\u7edf\u6027\u80fd\u548cSSD\u786c\u76d8\u5bff\u547d\u7684\u5f71\u54cd\u3002<\/p>\n

\n

\"\"<\/a>
<\/span><\/p>\n<\/p><\/div>\n

\u76d8\u63a7\u534f\u540c<\/b><\/p>\n

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\u652f\u6301\u524d\u540e\u7aef<\/b>UNMAP\u529f\u80fd<\/b><\/p>\n

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\u5143\u6570\u636e\u7ba1\u7406<\/b><\/p>\n

ROW\u8ffd\u52a0\u5199\u3001\u5168\u5c40\u5783\u573e\u56de\u6536<\/b>\u548c\u91cd\u5220\u3001UNMAP\u7b49\u7279\u6027\uff0c\u5728\u5b9e\u9645\u4e1a\u52a1\u4e2d\uff0c\u89e6\u53d1\u5143\u6570\u636e\u968f\u65f6\u968f\u523b\u88ab\u8bbf\u95ee\u548c\u53d1\u751f\u53d8\u5316\uff0c\u5168\u95ea\u5b58\u50a8\u7cfb\u7edf\u6027\u80fd\u7684\u53d1\u6325\u9700\u8981\u9ad8\u6548\u7684\u5143\u6570\u636e\u7ba1\u7406\u7cfb\u7edf\u7684\u652f\u6491\u3002\u6d6a\u6f6e\u4fe1\u606f\u96c6\u4e2d\u5f0f\u5b58\u50a8\u5168\u95ea\u6808\u901a\u8fc7\u5143\u6570\u636e\u8bfb\u5199\u7f13\u5b58\uff0c\u7ed3\u5408log\u3001B+\u6811\u548chash\u8868\u7684\u7ec4\u7ec7\u65b9\u5f0f\u548c\u667a\u80fd\u7ba1\u7406\u7b97\u6cd5\uff0c\u63d0\u9ad8\u5143\u6570\u636e\u67e5\u627e\u548c\u66f4\u65b0\u7684\u6548\u7387\uff0c\u4fdd\u8bc1IO\u5728\u8f6f\u4ef6\u6808\u4e2d\u7684\u6267\u884c\u6548\u7387\uff0c\u5145\u5206\u53d1\u6325\u540e\u7aefSSD\u786c\u76d8\u7684\u6027\u80fd\u3002<\/p>\n

\u667a\u80fd\u8d44\u6e90\u8c03\u5ea6<\/b><\/p>\n

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\u6027\u4ef7\u6bd4\u548c\u80fd\u6548\u6bd4\u4e4b\u9009<\/b><\/p>\n

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\n

\"\"<\/a>
<\/span><\/p>\n<\/p><\/div>\n

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<\/div>\n","protected":false},"excerpt":{"rendered":"

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