{"id":200872,"date":"2020-11-23T11:12:55","date_gmt":"2020-11-23T03:12:55","guid":{"rendered":"http:\/\/4563.org\/?p=200872"},"modified":"2020-11-25T12:34:53","modified_gmt":"2020-11-25T04:34:53","slug":"%e8%af%b7%e9%97%ae%e5%9c%a8-linux-%e4%b8%8b%e5%a6%82%e4%bd%95%e6%b8%85%e7%a9%ba%e4%b8%80%e4%b8%aa%e5%a4%a7%e6%96%87%e4%bb%b6%e7%9a%84%e5%86%85%e5%ae%b9%e5%af%b9%e7%a3%81%e7%9b%98-i-o-%e7%9a%84","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=200872","title":{"rendered":"\u8bf7\u95ee\u5728 Linux \u4e0b\u5982\u4f55\u6e05\u7a7a\u4e00\u4e2a\u5927\u6587\u4ef6\u7684\u5185\u5bb9\u5bf9\u78c1\u76d8 I\/O \u7684\u51b2\u51fb\u8f83\u5c0f\uff1f"},"content":{"rendered":"
\n
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\n

\u8bf7\u95ee\u5728 Linux \u4e0b\u5982\u4f55\u6e05\u7a7a\u4e00\u4e2a\u5927\u6587\u4ef6\u7684\u5185\u5bb9\u5bf9\u78c1\u76d8 I\/O \u7684\u51b2\u51fb\u8f83\u5c0f\uff1f <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : zhoudaiyu <\/span> <\/i> 2<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\u76ee\u524d\u77e5\u9053\u5982\u4e0b\u51e0\u79cd\u65b9\u5f0f\u53ef\u4ee5\u6e05\u7a7a\u6587\u4ef6(\u5047\u5b9a\u6587\u4ef6\u540d\u662f foo)\uff1a 1 \u3001echo>foo(>foo,:>foo) 2 \u3001cp \/dev\/null(cat \/dev\/null)>foo 3 \u3001dd if=\/dev\/null of=a 4 \u3001truncate -s 0 a<\/p>\n

\u8bf7\u95ee\u54ea\u79cd\u6e05\u7406\u65b9\u5f0f\u5bf9\u78c1\u76d8\u7684 I\/O \u51b2\u51fb\u5c0f\u4e00\u4e9b\uff1f<\/p>\n<\/p><\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (40<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ysc3839 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4e2a\u4eba\u8ba4\u4e3a\u662f 1 \u548c 4 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : zhoudaiyu <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @ysc3839 #1 \u4e3a\u4ec0\u4e48\u5462 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : xuanbg <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u91cd\u65b0\u94fe\u63a5\u4e00\u4e2a\u6587\u4ef6\uff0c\u51e0\u4e4e\u6ca1\u6709\u78c1\u76d8 IO <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : XiLingHost <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    rm -f a && touch a <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : zhoudaiyu <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @xuanbg #3 \u786c\u8fde\u63a5\uff1f<\/p>\n

    @XiLingHost #4 \u8fd9\u6837\u4f1a\u4e0d\u4f1a\u6709\u4e00\u77ac\u95f4\u5411\u8fd9\u4e2a\u6587\u4ef6\u5199\u6570\u636e\u7684\u5e94\u7528\u62a5\u9519\uff1f <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ysc3839 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @zhoudaiyu \u56e0\u4e3a\u6ca1\u6709\u5411\u6587\u4ef6\u5199\u6570\u636e\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : codehz <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u663e\u7136\u548c\u6587\u4ef6\u7cfb\u7edf\u6709\u5173\u7cfb\uff0c\u9700\u8981\u6839\u636e\u5177\u4f53\u60c5\u51b5\u5206\u6790 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : zhoudaiyu <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @codehz #7 \u4e5f\u5c31\u662f\u8bf4\u4e0d\u540c\u7684 fs \u8981\u7528\u4e0d\u540c\u7684\u547d\u4ee4\u4fdd\u8bc1\u51b2\u51fb\u6700\u5c0f\u5316\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : msg7086 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u6e05\u7a7a\u6587\u4ef6\u672c\u8d28\u4e0a\u5c31\u662f\u628a\u6587\u4ef6\u7684\u5927\u5c0f\u6539\u4e3a\u96f6\u3002\u4f60\u8bf4\u5bf9\u8fd9\u4e9b\u65b9\u5f0f\u8c03\u7528\u7684\u662f\u540c\u4e00\u4e2a\u64cd\u4f5c\u3002
    dd \u6587\u4ef6\u9ed8\u8ba4\u5c31\u662f\u5148 truncate\uff0c\u91cd\u5b9a\u5411\u4e5f\u662f\u3002
    \u6240\u4ee5\u4f60\u5c31\u662f\u8d34\u4e86 4 \u4e2a\u4e00\u6837\u7684\u4e1c\u897f\u2026\u2026 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : zhoudaiyu <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @msg7086 #9 \u76f8\u540c\u7684\u7cfb\u7edf\u8c03\u7528\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : laminux29 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u51b2\u51fb\u5c0f\u7684\u6b63\u786e\u65b9\u5f0f\u5e94\u8be5\u8ba9\u6587\u4ef6\u7cfb\u7edf\uff0c\u6839\u636e\u78c1\u76d8\u8bbe\u5907\u7684\u8d1f\u8f7d\uff0c\u6765\u5bf9 io \u64cd\u4f5c\u8fdb\u884c\u4f18\u5148\u7ea7\u5212\u5206\u3002\u4f46\u662f\u76ee\u524d\u4e3b\u6d41 fs \u597d\u50cf\u6ca1\u8fd9\u65b9\u9762\u7684 api \u3002<\/p>\n

    \u9000\u800c\u4e14\u6c42\u5176\u6b21\u7684\u65b9\u6cd5\u662f\uff0c\u76d1\u63a7\u78c1\u76d8\u8bbe\u5907\u7684\u8d1f\u8f7d\uff0c\u8d1f\u8f7d\u9ad8\u7684\u65f6\u5019\u4e0d\u5199\u5165\uff0c\u8d1f\u8f7d\u4f4e\u7684\u65f6\u5019\u518d\u5199\u5165\u3002 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : fasionchan <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @zhoudaiyu \u5e94\u8be5\u90fd\u662f flags \u8bbe\u7f6e O_TRUNC \u6807\u5fd7\u7684 open \u7cfb\u7edf\u8c03\u7528\uff0c\u591a\u770b\u770b\u64cd\u4f5c\u7cfb\u7edf\u5e95\u5c42\uff0c\u522b\u88ab\u773c\u524d\u7684\u8868\u8c61\u7ed9\u9a97\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : zhoudaiyu <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @laminux29 #11 \u81f3\u5c11\u6211\u4eec\u7528\u7684 ext3 \u597d\u50cf\u6ca1\u6709
    @fasionchan #12 \u5206\u6b21 truncate \u9760\u8c31 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : muzuiget <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8fd9\u4e0d\u662f\u6587\u4ef6\u7cfb\u7edf\u7684\u7684\u8d23\u4efb\u5417\uff0c\u672c\u6765\u5220\u9664\u6587\u4ef6\u5c31\u662f\u4ec5\u5220\u9664\u6587\u4ef6\u5143\u6570\u636e\uff0c\u4e0b\u6b21\u5199\u6570\u636e\u8986\u76d6\u5c31\u662f\u4e86\uff0c\u5220\u9664\u5c31\u662f\u9a6c\u4e0a\u5b8c\u6210\u7684\u4e8b\u3002<\/p>\n

    \u4f60\u8981\u662f\u201c\u5b89\u5168\u64e6\u9664\u201d\u90a3\u79cd\uff0c\u4f60\u8fd9\u4e48\u8fd8\u662f\u5f97\u6bcf\u9694\u5b57\u8282\u8986\u76d6\u4e00\u6b21\uff0c\u54ea\u79cd\u65b9\u6cd5\u90fd\u4e00\u6837\u3002 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : walker2laok <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    echo ‘ ‘ > big_file.log <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : mingl0280 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u6211\u5370\u8c61\u91cc\u8fd9\u56db\u4e2a\u6700\u540e\u90fd\u662f\u8c03\u7684 trunc\uff0c\u6240\u4ee5\u6ca1\u533a\u522b\uff08\uff1f\uff09\uff0c\u4f60\u53ef\u4ee5\u81ea\u5df1\u521b\u5efa\u51e0\u4e2a\u6587\u4ef6 strace \u4e0b\u2026\u2026 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : iceheart <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    unlink <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ericbize <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5f88\u597d\u5947\u4e3b\u4f7f\u7528\u573a\u666f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : AmrtaShiva <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    15L \u8fd9\u4e2a\u81ea\u5df1\u7528\u8fc7 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : vuuv <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    4 \u6700\u5c0f\uff0c1 \u6b21\u4e4b\u3002\u56e0\u4e3a 1 \u76f8\u5f53\u4e8e truncate+write \u7a7a\u5b57\u7b26\u4e32\uff0c\u591a\u4e86\u81f3\u5c11\u4e00\u6b21\u78c1\u76d8\u64cd\u4f5c\u3002\u5f53\u7136\u5185\u6838\u4e5f\u53ef\u80fd\u628a\u8fd9\u51e0\u6b21\u64cd\u4f5c\u7ed9\u5408\u5e76\u6389\uff0c\u4ece\u800c\u6ca1\u6709\u5dee\u5f02\u3002
    2 \u548c 3 \u662f\u4e00\u6837\u7684\u5751\uff0c\u56e0\u4e3a\u6ca1\u6709\u9650\u5b9a\u6e90\u6216\u76ee\u7684\u7684\u5927\u5c0f\uff0c\u4f1a\u5360\u6ee1\u6574\u4e2a\u5206\u533a\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : vuuv <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u53e6\u5916\uff0c\u6587\u4ef6\u4e0d\u662f\u4f60\u5355\u65b9\u9762\u6e05\u7a7a\u5c31\u4e86\u4e8b\u4e86\uff0c\u4f60\u5f97\u6709\u673a\u5236\u544a\u8bc9\u8fdb\u7a0b\u91cd\u65b0\u8c03\u6574\u5df2\u6253\u5f00\u6587\u4ef6\u7684 offset \u3002
    \u4e0d\u7136\u8fdb\u7a0b\u4f1a\u7ee7\u7eed\u4f7f\u7528\u5176\u4fdd\u5b58\u7684 offset \u5199\u6587\u4ef6\u3002\u5982\u679c\u4e4b\u524d\u662f 2G\uff0c\u90a3\u4e48\u5916\u90e8\u6e05\u7a7a\u540e\uff0c\u6b64\u8fdb\u7a0b\u7684\u6587\u4ef6\u4f9d\u65e7\u4fdd\u6301\u6253\u5f00\u72b6\u6001\uff0c\u4f1a\u7ee7\u7eed\u4ece 2G \u5f00\u59cb\u5199\uff0c\u8fd9\u79cd\u88ab\u79f0\u4e3a\u7a00\u758f\u6587\u4ef6\u3002\u5047\u8bbe\u5199 100m\uff0c\u5219 ls \u5927\u5c0f 2.1G \uff08\u770b offset \uff09\uff0cdu \u5927\u5c0f 100m \uff08\u6570 fs block \uff09\u3002
    \u66f4\u52a0\u5e38\u89c4\u7684\u505a\u6cd5\u662f mv \u539f\u6587\u4ef6\uff0c\u7136\u540e\u751f\u6210\u65b0\u7684\u7a7a\u6587\u4ef6\uff0c\u7136\u540e\uff08\u5927\u90fd\u7528 sighup \uff09\u901a\u77e5\u8fdb\u7a0b\u91cd\u65b0\u6253\u5f00\u4e00\u6b21\u3002\u4ece\u800c\u5b8c\u6210\u6587\u4ef6\u5207\u6362\u3002\u8fd9\u6837\u91cd\u65b0\u6253\u5f00\u6587\u4ef6\u524d\uff0c\u6570\u636e\u4f1a\u7ee7\u7eed\u5199\u5230\u539f\u6587\u4ef6\uff0c\u4e4b\u540e\u53ea\u5199\u65b0\u6587\u4ef6\uff0c\u7b97\u662f\u65e0\u7f1d\u5207\u6362\u4e86\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : openbsd <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4e00\u822c\u90fd\u662f\u7528 15 \u8bf4\u7684\u6cd5\u5b50 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : liuhuan475 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    echo ” > xxx <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : sujin190 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @zhoudaiyu #5 \u5220\u9664\u540e\u9700\u8981\u7b49\u6240\u6709\u4e00\u6253\u5f00\u7684\u8fdb\u7a0b\u90fd\u5173\u95ed\u8fd9\u4e2a\u6587\u4ef6\u4e4b\u540e\u624d\u4f1a\u771f\u6b63\u4ece\u78c1\u76d8\u5220\u9664\uff0c\u7ee7\u7eed\u8bfb\u5199\u5b8c\u5168\u662f\u6b63\u5e38\u7684\uff0c\u78c1\u76d8\u5176\u5b9e\u5e76\u4e0d\u4f1a\u91ca\u653e\uff0c\u6240\u4ee5\u5982\u679c\u4f60\u60f3\u8bf4\u7684\u7c7b\u4f3c\u65e5\u5fd7\u6587\u4ef6\u5199\u7684\u592a\u5927\u4e86\uff0c\u60f3\u6e05\u7a7a\u5b83\u53c8\u4e0d\u60f3\u91cd\u542f\u8fdb\u7a0b\u4f30\u8ba1\u4e0d\u884c\uff0c\u4f3c\u4e4e\u4e0d\u8ba9\u8fdb\u7a0b\u91cd\u65b0\u6253\u5f00\u8fd9\u4e2a\u6587\u4ef6\u662f\u4e0d\u884c\u7684\u5427\uff0c\u5426\u5219\u5220\u9664\u65b0\u5efa\u6700\u9760\u8c31\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : zhoudaiyu <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @ericbize \u6e05\u7406\u5927\u65e5\u5fd7 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ericbize <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @zhoudaiyu \u5199\u4e2a\u811a\u672c\uff0c\u6ca1\u4ec0\u4e48 io \u7684\u65f6\u5019\u64cd\u4f5c\u4e0d\u7a33\u4e48 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : li492135501 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5728\u6587\u4ef6\u8868\u91cc\u5220\u6389 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : zhoudaiyu <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @ericbize \u90a3\u8fd8\u5f97\u5b9a\u65f6\u67e5 IO \u554a <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ericbize <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u53ea\u8981\u4e0d\u662f\u50cf\u6211\u53f8\u8fd9\u79cd\uff0c 7×24 \u90fd\u662f\u9ad8\u5cf0\u7684\uff0c \u665a\u4e0a\u4e00\u822c\u90fd\u8fd8\u597d\u5427\uff01 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : zhoudaiyu <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @ericbize \u4f46\u662f\u5f80\u5f80\u767d\u5929\u78c1\u76d8\u5c31\u544a\u8b66\u4e86… <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : no1xsyzy <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @vuuv
    1 \u5177\u4f53\u662f\u5426\u4f1a write \u751a\u81f3\u662f shell \u7684\u5177\u4f53\u5b9e\u73b0\u3002\u6709\u53ef\u80fd shell \u7684 > \u91cd\u5b9a\u5411\u5728\u957f\u5ea6 = 0 \u7684\u65f6\u5019\u4e0d\u5199\u5165\u3002
    \u4e0d\u8fc7 shell \u4f3c\u4e4e\u662f fork \u4e4b\u540e open\uff0c\u628a\u62ff\u5230\u7684 fp \u66ff\u6362 stdout \u7136\u540e exec \uff1f\u90a3\u6837\u7684\u8bdd\u4f3c\u4e4e\u5f97\u770b echo \u7684\u5b9e\u73b0\u3002
    2 \u548c 3\uff1a \/dev\/null \u4f5c\u4e3a\u8bfb\u53d6\u7684\u65f6\u5019\u5927\u5c0f\u5c31\u662f 0 \uff08\u533a\u522b\u4e8e \/dev\/zero \uff09\uff0c\u4e00\u8bfb\u5c31\u662f EOF <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : no1xsyzy <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4f60\u8fd9\u662f\u5199\u4e86\u591a\u5c11\u65e5\u5fd7\uff1f\u767d\u5929\u5c31\u5360\u6ee1\u78c1\u76d8\uff0c\u8fd9\u4e48\u591a\u5185\u5bb9\u6709\u4eba\u770b\u5417\uff1f\u770b\u5f97\u8fc7\u6765\u5417\uff1f
    \u6ca1\u4eba\u770b\u76f4\u63a5\u5199\u8fdb \/dev\/null <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : Jirajine <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @zhoudaiyu XY \u95ee\u9898\uff0c\u65e5\u5fd7\u4e0d\u8be5\u76f4\u63a5\u5199\u5230\u78c1\u76d8\u4e0a\u3002\u5c31\u7b97\u8981\u5199\u4e5f\u662f\u7edf\u4e00\u6536\u96c6\u5206\u6790\u540e\u518d\u5199\uff0c\u8fd9\u6837\u6e05\u7406\u7684\u65f6\u5019\u4e00\u5b9a\u8981\u8ba9\u8fdb\u7a0b reload \u4e00\u4e0b\u91cd\u65b0\u6253\u5f00\u6587\u4ef6\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : CallMeReznov <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u59ff\u52bf\u548c\u8bbe\u5907\u4f7f\u7528\u65b9\u6cd5\u4e0d\u5bf9\u7684\u7ed3\u679c\u3002
    2X \u4e2a\u76d8 R5 \u8f6f\u9635\u5217\u4e86\u89e3\u4e00\u4e0b\uff1f
    \"\u8bf7\u95ee\u5728 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ppphp <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u65e5\u5fd7\u5e94\u8be5 logrotate\uff0c\u4e0d\u5e94\u8be5\u51fa\u73b0\u5927\u65e5\u5fd7\u5176\u5b9e <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : zhoudaiyu <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @no1xsyzy \u5176\u5b9e\u6ca1\u4eba\u770b \u4f46\u662f\u597d\u591a\u65e5\u5fd7\u90fd\u662f\u8fd9\u4e48\u73a9\u7684 \u6ca1\u65f6\u95f4\u5f04 \uff08\u72d7\u5934<\/p>\n

    @Jirajine
    @ppphp \u8bf4\u7684\u5bf9\uff0c\u4f46\u662f\u5de5\u4f5c\u91cf\u592a\u5927\u4e86\uff0c\u592a\u4e0d\u89c4\u8303\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : zhoudaiyu <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @CallMeReznov \u4e0d\u592a\u6e05\u695a\u516c\u53f8\u7684\u865a\u673a\u78c1\u76d8\u505a\u6ca1\u505a raid <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : DoctorCat <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u51b2\u51fb\u8f83\u5c0f\u600e\u4e48\u7406\u89e3\uff1f\uff1f\uff1f
    \u9664\u975e\u662f\u5199\u5927\u91cf\u7684\u6570\u636e\u8fdb\u53bb\uff0c\u76f8\u6bd4\u5220\u9664\uff0c\u51e0\u4e2a\u539f\u7406\u90fd\u5dee\u4e0d\u591a\u7684\u3002\u6700\u7ec8\u90fd\u662f\u8981 read \u3001mmap \u3001fstat \u3001write \u64cd\u4f5c\u7684\u3002
    VFS \u53ea\u662f\u51e0\u7ec4\u6570\u636e\u7ed3\u6784\u5440\uff0c\u63d0\u4f9b\u7edf\u4e00\u63a5\u53e3\u5e76\u7ef4\u6301\u72b6\u6001\u800c\u5df2\uff0c\u540c\u4e00\u4e2a\u6587\u4ef6\u7cfb\u7edf\u4e2d\uff0c\u6392\u9664\u4e2d\u65ad\u7684\u8017\u65f6\u548c\u78c1\u76d8\u6027\u80fd\u56e0\u7d20\u5916\uff0c\u57fa\u672c\u90fd\u4e00\u6837\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : no1xsyzy <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u554a\uff0c\u5176\u5b9e\u8fd8\u6709\u8fd9\u79cd\u65b9\u6cd5\u6765\u6e05\u7a7a\u6587\u4ef6\uff1ashell \u91cc\u76f4\u63a5\u8f93\u5165
    > filename
    \u6211\u60f3\u8d77\u6765\u4e86\uff0c > \u7684\u65f6\u5019\u4f1a\u81ea\u52a8\u56e0\u4e3a open \u7684\u6a21\u5f0f\u662f w \u800c truncate \u6389\u3002
    \u4ecd\u7136\u6709\u7a00\u758f\u6587\u4ef6\u7684\u95ee\u9898\u3002<\/p>\n

    \u60f3\u5230\uff0c\u8fd8\u6709\u5c31\u662f mkfifo a.log \u7136\u540e nohup cat < a.log > \/dev\/null <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : doubledna <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    echo ” ” > filename <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"

    \u8bf7\u95ee\u5728 Linux \u4e0b\u5982\u4f55\u6e05\u7a7a\u4e00\u4e2a…<\/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\/200872"}],"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=200872"}],"version-history":[{"count":1,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/200872\/revisions"}],"predecessor-version":[{"id":200874,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/200872\/revisions\/200874"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=200872"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=200872"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=200872"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}