{"id":438990,"date":"2021-04-11T15:17:02","date_gmt":"2021-04-11T07:17:02","guid":{"rendered":"http:\/\/4563.org\/?p=438990"},"modified":"2021-04-11T15:17:02","modified_gmt":"2021-04-11T07:17:02","slug":"linux-%e7%b3%bb%e7%bb%9f%e4%bd%bf%e7%94%a8%e7%9b%b4%e6%8e%a5-i-o%ef%bc%8c%e6%98%af%e5%90%a6%e4%bc%9a%e4%ba%a7%e7%94%9f%e5%a4%9a%e7%ba%bf%e7%a8%8b%e5%b9%b6%e5%8f%91%e9%94%99%e8%af%af%ef%bc%9f","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=438990","title":{"rendered":"Linux \u7cfb\u7edf\u4f7f\u7528\u76f4\u63a5 I\/O\uff0c\u662f\u5426\u4f1a\u4ea7\u751f\u591a\u7ebf\u7a0b\u5e76\u53d1\u9519\u8bef\uff1f"},"content":{"rendered":"
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Linux \u7cfb\u7edf\u4f7f\u7528\u76f4\u63a5 I\/O\uff0c\u662f\u5426\u4f1a\u4ea7\u751f\u591a\u7ebf\u7a0b\u5e76\u53d1\u9519\u8bef\uff1f <\/h1>\n

<\/p>\n

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\u8cc7\u6df1\u5927\u4f6c : LeeReamond <\/span> <\/i> 0<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\u5982\u9898\uff0cmysql \u3001redis \u4e4b\u7c7b\u7684\u6570\u636e\u5e93\u4f3c\u4e4e\u90fd\u4f1a\u5b9e\u73b0\u81ea\u5df1\u7684\u6587\u4ef6\u7ba1\u7406\u7cfb\u7edf\uff0c\u6839\u636e\u6211\u5728\u7f51\u4e0a\u67e5\u5230\u7684\u6d88\u606f\uff0c\u8fd9\u7c7b\u76f4\u63a5 IO \u662f\u4e0d\u9700\u8981\u7ecf\u8fc7\u5185\u6838\u7684\u3002<\/p>\n

Linux \u5185\u6838\u5728\u5904\u7406\u6587\u4ef6\u65f6\uff0c\u6bd4\u5982\u4e09\u4e2a\u8fdb\u7a0b\u540c\u65f6\u5411\u6307\u5411\u540c\u4e00\u4e2a\u6587\u4ef6\u7684\u4e09\u4e2a fd \u5199\u5165\u5185\u5bb9\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u56e0\u4e3a\u90fd\u4f1a\u4f7f\u7528\u7cfb\u7edf\u8c03\u7528\u5199\u5165\uff0c\u6240\u4ee5\u4f3c\u4e4e\u662f linux \u4f1a\u81ea\u52a8\u5904\u7406\u597d\u5e76\u53d1\u53ef\u80fd\u4ea7\u751f\u7684\u4e71\u5e8f\u5199\u5165\u95ee\u9898\uff08\u4e71\u5e8f\u5199\u5165\u6307\u591a\u7ebf\u7a0b\u4e92\u76f8\u8986\u76d6\u5bfc\u81f4\u5b9e\u9645\u5185\u5bb9\u6bd4\u671f\u671b\u5185\u5bb9\u5c11\uff0c\u4e14\u7f16\u7801\u9519\u4e71\uff0c\u4f3c\u4e4e\u662f\u4e0d\u4f1a\u53d1\u751f\u8fd9\u79cd\u95ee\u9898\uff09<\/p>\n

\u5b66\u4e60 IO \u7684\u65f6\u5019\u4ea7\u751f\u4e00\u4e2a\u95ee\u9898\u5c31\u662f\u76f4\u63a5 IO \u662f\u5426\u610f\u5473\u7740\u7528\u6237\u9700\u8981\u81ea\u5df1\u534f\u8c03\u8fdb\u7a0b\u95f4\u901a\u4fe1\u4ee5\u4fdd\u8bc1\u540c\u4e00\u65f6\u95f4\u6ca1\u6709\u4e24\u4e2a\u4eba\u5728\u5199\u5165\uff1f\u5982\u82e5\u4e0d\u7136\u53ef\u9760\u6027\u662f\u600e\u4e48\u4fdd\u8bc1\u7684\u5462\u3002<\/p>\n

\u8c22\u8c22\u5927\u5bb6<\/p>\n<\/p><\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (5<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : codehz <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8c01\u8ddf\u4f60\u8bf4 direct io \u4e0d\u8d70\u5185\u6838\uff1f\uff1f\uff1f
    \u53ea\u662f\u6ca1\u5185\u6838\u7f13\u51b2\u800c\u5df2\uff0c\u5185\u6838\u8fd8\u662f\u6ca1\u7ed5\u8fc7\uff0c\u81ea\u5df1\u7ba1\u7406\u7f13\u51b2\u4ee5\u5b9e\u73b0\u66f4\u9ad8\u7684\u6548\u7387\u3002\u3002\u3002\u4e5f\u5c31\u662f\u540c\u6b65\u7684\u5c42\u6b21\u4f4e\u4e86\u70b9\uff0c\u4e0d\u80fd\u4fdd\u8bc1\u5355\u6b21\u5199\u5165\u7684\u539f\u5b50\u6027\u800c\u5df2\uff08\u4e3b\u8981\u662f\u4e3a\u4e86 aio \uff09 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : LeeReamond <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @codehz \u611f\u8c22\u56de\u590d\uff0c\u6240\u4ee5\u610f\u601d\u662f\u6240\u8c13\u7684\u76f4\u63a5 io \u662f\u6307\uff0c\u4ed6\u53ea\u662f\u5728\u628a\u7f13\u51b2\u533a\u8f93\u51fa\u5230\u786c\u76d8\u7684\u65f6\u5019\u9700\u8981\u7cfb\u7edf\u8c03\u7528\uff0c\u8fd9\u4e2a\u610f\u4e49\u4e0a\u7684\u7cfb\u7edf\u8c03\u7528\u51cf\u5c11\uff0c\u7136\u540e\u63d0\u9ad8\u4e86\u6548\u7387\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : codehz <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @LeeReamond \u6ca1\u6709\u51cf\u5c11\u7cfb\u7edf\u8c03\u7528\uff0c\u76f8\u53cd\uff0c\u7531\u4e8e\u51e0\u4e4e\u53ea\u80fd\u914d\u5408 native aio \u4f7f\u7528\uff08\u4e0d\u7136\u6bd4 buffered io \u8fd8\u6162\uff09\uff0c\u4e8b\u5b9e\u4e0a\u8fd8\u7565\u5fae\u589e\u52a0\u4e86\u8c03\u7528\u7684\u603b\u4e2a\u6570\u3002\u3002\u3002
    \u63d0\u9ad8\u6548\u7387\u7684\u539f\u56e0\u5c31\u662f\u7701\u53bb\u7684\u5185\u6838\u7f13\u51b2\u533a\uff0c\u53ef\u4ee5\u76f4\u63a5\u4ece\u7528\u6237\u7f13\u51b2\u533a\u5199\u5230\u5757\u8bbe\u5907\u4e0a\uff0c\u4e8e\u662f\u5c31\u4f1a\u6709\u6f5c\u5728\u7684\u7ade\u4e89\u72b6\u6001\uff08\u5982\u679c\u591a\u4e2a\u7ebf\u7a0b\u540c\u65f6\u64cd\u4f5c\uff0c\u6216\u8005\u4e00\u4e2a\u7ebf\u7a0b\u91cc\u63d0\u4ea4\u91cd\u53e0\u7684\u5f02\u6b65 io \u8bf7\u6c42\uff09
    \uff08\u7136\u540e\uff0c\u7531\u4e8e\u76f4\u63a5\u5199\u5165\u78c1\u76d8\uff0c\u6240\u4ee5\u4e5f\u4e0d\u9700\u8981\u989d\u5916\u7684\u6587\u4ef6\u7cfb\u7edf\u540c\u6b65\u4e86\uff0c\u6570\u636e\u5e93\u5c31\u9700\u8981\u8fd9\u4e2a\uff09 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : LeeReamond <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @codehz \u8fd8\u662f\u4e0d\u662f\u5f88\u7406\u89e3\uff0c\u4e3b\u8981\u662f\u4e24\u70b9\uff0c\u5176\u4e00\u662f\u5173\u4e8e\u201c\u4e8e\u662f\u5c31\u4f1a\u6709\u6f5c\u5728\u7684\u7ade\u4e89\u72b6\u6001\u201d\u8fd9\u90e8\u5206\uff0c\u6240\u4ee5\u7406\u8bba\u4e0a\u76f4\u63a5 IO \u786e\u5b9e\u9700\u8981\u81ea\u5df1\u5904\u7406\u7ade\u4e89\uff0c\u7edf\u4e00\u8fdb\u7a0b\u5185\u53ef\u4ee5\u7528\u7ebf\u7a0b\u4e89\u7528\u7684\u89e3\u51b3\u65b9\u6848\uff0c\u8de8\u8fdb\u7a0b\u7684\u8bdd\u9700\u8981\u7528\u8de8\u8fdb\u7a0b\u65b9\u6848\u624d\u80fd\u907f\u514d\u51fa\u9519\uff1f\u8fd9\u4e5f\u662f\u6700\u5f00\u59cb\u7591\u60d1\u7684\u5730\u65b9\u3002<\/p>\n

    \u53e6\u5916\u5173\u4e8e\u63d0\u9ad8\u6548\u7387\u7684\u90e8\u5206\uff0c\u5b83\u7528\u7528\u6237\u7f13\u51b2\u533a\u4ee3\u66ff\u5185\u6838\u7f13\u51b2\u533a\u672c\u8eab\u4e0d\u662f\u4e00\u79cd\u51cf\u5c11\u7cfb\u7edf\u8c03\u7528\u7684\u884c\u4e3a\u4e48\u3002\u800c\u4f60\u8bf4\u7684\u201c\u76f4\u63a5\u4ece\u7528\u6237\u7f13\u51b2\u533a\u5199\u5230\u5757\u8bbe\u5907\u4e0a\u201d\uff0c\u8fd9\u91cc\u662f\u6307\u7269\u7406\u5199\u5165\u786c\u76d8\u7684\u884c\u4e3a\u5427\uff0c\u8fd8\u662f\u8bf4\u5757\u8bbe\u5907\u4ecd\u7136\u662f\u4e00\u79cd linux \u7684\u865a\u62df\u7f13\u51b2\uff0c\u5b9e\u9645\u5199\u5165\u884c\u4e3a\u5728\u66f4\u540e\u9762 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
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    \u8cc7\u6df1\u5927\u4f6c : codehz <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @LeeReamond \u76f4\u63a5\u5199\u5165\u7684\u610f\u601d\u662f\uff0c\uff08\u540c\u6b65\u7684\u60c5\u51b5\u4e0b\uff09 read\/write \u7cfb\u7edf\u8c03\u7528\u7b49\u5f85\u6570\u636e\u843d\u76d8\u4e4b\u540e\u518d\u8fd4\u56de\uff0c\u7cfb\u7edf\u8c03\u7528\u8fd8\u662f\u90a3\u4e2a\u8c03\u7528\uff0c\u600e\u4e48\u5c31\u51cf\u5c11\u4e86\u7cfb\u7edf\u8c03\u7528\u5462\uff08\u5f53\u7136\u4f60\u4e0d\u80fd\u8bf4\u4e4b\u524d\u90fd\u4e00\u5b57\u8282\u53d1\u4e00\u4e2a\uff0c\u7136\u540e direct io \u8fd9\u8fb9\u6574\u7406\u8d77\u6765\u4e00\u8d77\u53d1\u8fd9\u79cd\u4e0d\u516c\u5e73\u7684\u5bf9\u6bd4\uff0c\u8fd9\u91cc\u5047\u8bbe\u90fd\u662f\u6309\u76f8\u540c\u7684\u5927\u5c0f\u53d1\u8c03\u7528\uff0c\u90a3\u4e48\u540c\u6b65\u7684\u60c5\u51b5\u4e0b\uff0c\u6570\u91cf\u5b8c\u5168\u6ca1\u5dee\u522b\uff09\uff0c\u4f46\u662f\u7531\u4e8e\u786c\u4ef6\u53ea\u80fd\u6309\u5757\u4e3a\u5355\u4f4d\u8bfb\u5199\uff0c\u4e00\u65e6\u6ca1\u6709\u6309\u5757\u5bf9\u9f50\u7684\u65b9\u5f0f\u53d1\u51fa direct io \u7684\u8bfb\u5199\u8c03\u7528\uff0c\u52bf\u5fc5\u4f1a\u6d6a\u8d39\u5e26\u5bbd\uff08\u6bd4\u5982\u5c0f\u4e8e\u4e00\u4e2a\u5757\uff09\u6216\u8005\u4ea7\u751f\u591a\u6b21\u8bfb\u5199\uff08\u8de8\u8d8a\u4e86\u5757\u8fb9\u754c\uff09\u4ee5\u589e\u52a0\u5ef6\u8fdf\uff0c\u901a\u5e38\u6765\u8bf4\u53cd\u800c\u66f4\u6162\uff0c\u6700\u5dee\u53ef\u4ee5\u76f8\u5dee\u51e0\u4e2a\u6570\u91cf\u7ea7\uff0cbuffered io \u5c31\u4e0d\u4e00\u6837\u4e86\uff0c\u6709\u7f13\u5b58\u5c31\u53ef\u4ee5\u628a\u4e00\u5806\u8bfb\u5199\u6536\u96c6\u8d77\u6765\uff0c\u5728\u4e0d\u5bf9\u9f50\u7684\u60c5\u51b5\u4e0b\u5e73\u644a\u4e86\u8bbf\u95ee\u7684\u5ef6\u8fdf\uff0c\u6548\u7387\u66f4\u9ad8\u3002
    \u4e0a\u9762\u8bf4\u7684\u6709\u70b9\u95ee\u9898\uff0c\u7ade\u4e89\u6761\u4ef6\u5e94\u8be5\u53ea\u5728\u8bfb\u5199\u4e4b\u95f4\u51b2\u7a81\uff0c\u5355\u7eaf\u7684\u5199\u6216\u8005\u8bfb\uff0c\u662f\u4e0d\u4f1a\u9020\u6210\u51b2\u7a81\u7684\uff0c\u9a71\u52a8\u540c\u65f6\u4fdd\u8bc1\u4e86\uff08\u903b\u8f91\u4e0a\uff09\u53ea\u6709\u4e00\u4e2a\u5199\u5165\u7684\u64cd\u4f5c\uff0c\u4f46\u662f\u7531\u4e8e\u6ca1\u5185\u6838\u7f13\u51b2\u548c\u989d\u5916\u7684\u4fdd\u62a4\u673a\u5236\uff0c\u8bfb\u53d6\u7684\u65f6\u5019\u53ef\u80fd\u51fa\u73b0\u4ea4\u66ff\u7684\u65b0\u65e7\u5185\u5bb9\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"

    Linux \u7cfb\u7edf\u4f7f\u7528\u76f4\u63a5 I\/O\uff0c…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/438990"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=438990"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/438990\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=438990"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=438990"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=438990"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}