<!DOCTYPE html>
<html lang="zh-CN">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width,initial-scale=1">
    <title> </title>
    <meta name="generator" content="VuePress 1.8.2">
    <link rel="icon" href="/favicon.ico">
    <meta name="description" content=" ">
    <meta name="Description" content="Apache IoTDB: Time Series Database for IoT">
    <meta name="Keywords" content="TSDB, time series, time series database, IoTDB, IoT database, IoT data management,时序数据库, 时间序列管理, IoTDB, 物联网数据库, 实时数据库, 物联网数据管理, 物联网数据">
    <meta name="baidu-site-verification" content="wfKETzB3OT">
    <meta name="google-site-verification" content="mZWAoRY0yj_HAr-s47zHCGHzx5Ju-RVm5wDbPnwQYFo">
    
    <link rel="preload" href="/assets/css/0.styles.ccadf850.css" as="style"><link rel="preload" href="/assets/js/app.fe44b663.js" as="script"><link rel="preload" href="/assets/js/3.5626571b.js" as="script"><link rel="preload" href="/assets/js/370.e7a52728.js" as="script"><link rel="prefetch" href="/assets/js/10.77e7d27b.js"><link rel="prefetch" href="/assets/js/100.5392026f.js"><link rel="prefetch" href="/assets/js/101.4d24dbb3.js"><link rel="prefetch" href="/assets/js/102.4db55384.js"><link rel="prefetch" href="/assets/js/103.28a00d56.js"><link rel="prefetch" href="/assets/js/104.c1cad722.js"><link rel="prefetch" href="/assets/js/105.2dbc18e7.js"><link rel="prefetch" href="/assets/js/106.03cb3598.js"><link rel="prefetch" href="/assets/js/107.1aa2e9d5.js"><link rel="prefetch" href="/assets/js/108.c8e15789.js"><link rel="prefetch" href="/assets/js/109.4e029678.js"><link rel="prefetch" href="/assets/js/11.242ea813.js"><link rel="prefetch" href="/assets/js/110.2673e754.js"><link rel="prefetch" href="/assets/js/111.99869946.js"><link rel="prefetch" href="/assets/js/112.6931e30d.js"><link rel="prefetch" href="/assets/js/113.30edd688.js"><link rel="prefetch" href="/assets/js/114.cba21417.js"><link rel="prefetch" href="/assets/js/115.36ed9d85.js"><link rel="prefetch" href="/assets/js/116.b6f26e1b.js"><link rel="prefetch" href="/assets/js/117.b7ead194.js"><link rel="prefetch" href="/assets/js/118.0489f137.js"><link rel="prefetch" href="/assets/js/119.f4531020.js"><link rel="prefetch" href="/assets/js/12.4c48405a.js"><link rel="prefetch" href="/assets/js/120.d1bc4a0d.js"><link rel="prefetch" href="/assets/js/121.c4dac7da.js"><link rel="prefetch" href="/assets/js/122.37b6650b.js"><link rel="prefetch" href="/assets/js/123.6802c679.js"><link rel="prefetch" href="/assets/js/124.3a1dcf58.js"><link rel="prefetch" href="/assets/js/125.0c3e885a.js"><link rel="prefetch" href="/assets/js/126.fbfa46eb.js"><link rel="prefetch" href="/assets/js/127.110bc389.js"><link rel="prefetch" href="/assets/js/128.fd2a9b78.js"><link rel="prefetch" href="/assets/js/129.b0669c7b.js"><link rel="prefetch" href="/assets/js/13.16ded47d.js"><link rel="prefetch" href="/assets/js/130.830f695a.js"><link rel="prefetch" href="/assets/js/131.f74784eb.js"><link rel="prefetch" href="/assets/js/132.5bd44b31.js"><link rel="prefetch" href="/assets/js/133.4871f071.js"><link rel="prefetch" href="/assets/js/134.c1ebfd44.js"><link rel="prefetch" href="/assets/js/135.06b43884.js"><link rel="prefetch" href="/assets/js/136.4125fe2d.js"><link rel="prefetch" href="/assets/js/137.f79fb732.js"><link rel="prefetch" href="/assets/js/138.925cc589.js"><link rel="prefetch" href="/assets/js/139.269b4122.js"><link rel="prefetch" href="/assets/js/14.66eebc6d.js"><link rel="prefetch" href="/assets/js/140.8acac491.js"><link rel="prefetch" href="/assets/js/141.5739ba5c.js"><link rel="prefetch" href="/assets/js/142.0a0bb60d.js"><link rel="prefetch" href="/assets/js/143.a85602a6.js"><link rel="prefetch" href="/assets/js/144.af08976e.js"><link rel="prefetch" href="/assets/js/145.54dd8613.js"><link rel="prefetch" href="/assets/js/146.d6942192.js"><link rel="prefetch" href="/assets/js/147.58b089c2.js"><link rel="prefetch" href="/assets/js/148.f3061126.js"><link rel="prefetch" href="/assets/js/149.bed18caa.js"><link rel="prefetch" href="/assets/js/15.843fe861.js"><link rel="prefetch" href="/assets/js/150.857bbcb9.js"><link rel="prefetch" href="/assets/js/151.8df8eaff.js"><link rel="prefetch" href="/assets/js/152.7fbfa55b.js"><link rel="prefetch" href="/assets/js/153.88e78e8e.js"><link rel="prefetch" href="/assets/js/154.4c0105cf.js"><link rel="prefetch" href="/assets/js/155.56c02f22.js"><link rel="prefetch" href="/assets/js/156.3610ca5b.js"><link rel="prefetch" href="/assets/js/157.a82e8d14.js"><link rel="prefetch" href="/assets/js/158.cd306550.js"><link rel="prefetch" href="/assets/js/159.7c3f6836.js"><link rel="prefetch" href="/assets/js/16.17c1f643.js"><link rel="prefetch" href="/assets/js/160.d9e7ebc3.js"><link rel="prefetch" href="/assets/js/161.f69489a3.js"><link rel="prefetch" href="/assets/js/162.260f8f8c.js"><link rel="prefetch" href="/assets/js/163.6f4c436f.js"><link rel="prefetch" href="/assets/js/164.48a2358e.js"><link rel="prefetch" href="/assets/js/165.beba59fe.js"><link rel="prefetch" href="/assets/js/166.2534a588.js"><link rel="prefetch" href="/assets/js/167.daba1492.js"><link rel="prefetch" href="/assets/js/168.66d50e2f.js"><link rel="prefetch" href="/assets/js/169.4a288ab4.js"><link rel="prefetch" href="/assets/js/17.9b8df773.js"><link rel="prefetch" href="/assets/js/170.f0555c86.js"><link rel="prefetch" href="/assets/js/171.bbe4ba1a.js"><link rel="prefetch" href="/assets/js/172.712c6bac.js"><link rel="prefetch" href="/assets/js/173.c3917d0d.js"><link rel="prefetch" href="/assets/js/174.9d843f6f.js"><link rel="prefetch" href="/assets/js/175.ca25b135.js"><link rel="prefetch" href="/assets/js/176.35f2d232.js"><link rel="prefetch" href="/assets/js/177.e8e6286d.js"><link rel="prefetch" href="/assets/js/178.c37c5efd.js"><link rel="prefetch" href="/assets/js/179.84f3bdd6.js"><link rel="prefetch" href="/assets/js/18.122d5826.js"><link rel="prefetch" href="/assets/js/180.32503609.js"><link rel="prefetch" href="/assets/js/181.219cb189.js"><link rel="prefetch" href="/assets/js/182.e90074d5.js"><link rel="prefetch" href="/assets/js/183.87f069d1.js"><link rel="prefetch" href="/assets/js/184.6b62bd9f.js"><link rel="prefetch" href="/assets/js/185.4e6b021e.js"><link rel="prefetch" href="/assets/js/186.3679d30d.js"><link rel="prefetch" href="/assets/js/187.aeba6c58.js"><link rel="prefetch" href="/assets/js/188.cc1022eb.js"><link rel="prefetch" href="/assets/js/189.5ac3b4a4.js"><link rel="prefetch" href="/assets/js/19.9187dec1.js"><link rel="prefetch" href="/assets/js/190.ff15e49f.js"><link rel="prefetch" href="/assets/js/191.369829d5.js"><link rel="prefetch" href="/assets/js/192.1d1eb36e.js"><link rel="prefetch" href="/assets/js/193.fc0fb393.js"><link rel="prefetch" href="/assets/js/194.b47fbc4c.js"><link rel="prefetch" href="/assets/js/195.9e36d668.js"><link rel="prefetch" href="/assets/js/196.2d1223f7.js"><link rel="prefetch" href="/assets/js/197.55863e11.js"><link rel="prefetch" href="/assets/js/198.a48cc095.js"><link rel="prefetch" href="/assets/js/199.3a9c2528.js"><link rel="prefetch" href="/assets/js/20.cf088c3b.js"><link rel="prefetch" href="/assets/js/200.195ff96b.js"><link rel="prefetch" href="/assets/js/201.4d6c6e24.js"><link rel="prefetch" href="/assets/js/202.c32388f7.js"><link rel="prefetch" href="/assets/js/203.080586a5.js"><link rel="prefetch" href="/assets/js/204.a3b3ce92.js"><link rel="prefetch" href="/assets/js/205.9af51d77.js"><link rel="prefetch" href="/assets/js/206.ea246089.js"><link rel="prefetch" href="/assets/js/207.1c222b6c.js"><link rel="prefetch" href="/assets/js/208.fa41b6db.js"><link rel="prefetch" href="/assets/js/209.206e9cfe.js"><link rel="prefetch" href="/assets/js/21.fd51f269.js"><link rel="prefetch" href="/assets/js/210.e4599d5b.js"><link rel="prefetch" href="/assets/js/211.b4f21019.js"><link rel="prefetch" href="/assets/js/212.552b3f7c.js"><link rel="prefetch" href="/assets/js/213.e7924e39.js"><link rel="prefetch" href="/assets/js/214.4889616d.js"><link rel="prefetch" href="/assets/js/215.8bc1d1bf.js"><link rel="prefetch" href="/assets/js/216.aeaaff79.js"><link rel="prefetch" href="/assets/js/217.51dbbd91.js"><link rel="prefetch" href="/assets/js/218.477c1e20.js"><link rel="prefetch" href="/assets/js/219.fd6ed6fa.js"><link rel="prefetch" href="/assets/js/22.f9d73f8a.js"><link rel="prefetch" href="/assets/js/220.84349773.js"><link rel="prefetch" href="/assets/js/221.4b98b09e.js"><link rel="prefetch" href="/assets/js/222.57476182.js"><link rel="prefetch" href="/assets/js/223.1c0323f8.js"><link rel="prefetch" href="/assets/js/224.61e78712.js"><link rel="prefetch" href="/assets/js/225.9b6f0752.js"><link rel="prefetch" href="/assets/js/226.4868d0a5.js"><link rel="prefetch" href="/assets/js/227.6ba50795.js"><link rel="prefetch" href="/assets/js/228.1d3cd90f.js"><link rel="prefetch" href="/assets/js/229.6ca83068.js"><link rel="prefetch" href="/assets/js/23.6c7d7eea.js"><link rel="prefetch" href="/assets/js/230.5e6f7ed2.js"><link rel="prefetch" href="/assets/js/231.a8ecd36e.js"><link rel="prefetch" href="/assets/js/232.a18567c5.js"><link rel="prefetch" href="/assets/js/233.f79fadcf.js"><link rel="prefetch" href="/assets/js/234.d9207163.js"><link rel="prefetch" href="/assets/js/235.e81b51ae.js"><link rel="prefetch" href="/assets/js/236.b9c32f41.js"><link rel="prefetch" href="/assets/js/237.d795e1ce.js"><link rel="prefetch" href="/assets/js/238.49757612.js"><link rel="prefetch" href="/assets/js/239.aeda84ea.js"><link rel="prefetch" href="/assets/js/24.a553bb19.js"><link rel="prefetch" href="/assets/js/240.07479801.js"><link rel="prefetch" href="/assets/js/241.ba1379fe.js"><link rel="prefetch" href="/assets/js/242.ce1b153f.js"><link rel="prefetch" href="/assets/js/243.18fd3c66.js"><link rel="prefetch" href="/assets/js/244.2b98e85b.js"><link rel="prefetch" href="/assets/js/245.bf64d7c9.js"><link rel="prefetch" href="/assets/js/246.d0a5b73c.js"><link rel="prefetch" href="/assets/js/247.b9bc9104.js"><link rel="prefetch" href="/assets/js/248.714df448.js"><link rel="prefetch" href="/assets/js/249.e0039e9d.js"><link rel="prefetch" href="/assets/js/25.1e42b275.js"><link rel="prefetch" href="/assets/js/250.ca664993.js"><link rel="prefetch" href="/assets/js/251.b47f298a.js"><link rel="prefetch" href="/assets/js/252.71392152.js"><link rel="prefetch" href="/assets/js/253.e0f23ec8.js"><link rel="prefetch" href="/assets/js/254.6d43bbe7.js"><link rel="prefetch" href="/assets/js/255.c1779bd2.js"><link rel="prefetch" href="/assets/js/256.6a8a06f3.js"><link rel="prefetch" href="/assets/js/257.4e74c883.js"><link rel="prefetch" href="/assets/js/258.f4b72fd8.js"><link rel="prefetch" href="/assets/js/259.f9b80571.js"><link rel="prefetch" href="/assets/js/26.0057d37b.js"><link rel="prefetch" href="/assets/js/260.10e21bfc.js"><link rel="prefetch" href="/assets/js/261.402db160.js"><link rel="prefetch" href="/assets/js/262.02c5372b.js"><link rel="prefetch" href="/assets/js/263.3454f741.js"><link rel="prefetch" href="/assets/js/264.dfc588bd.js"><link rel="prefetch" href="/assets/js/265.f1fee64b.js"><link rel="prefetch" href="/assets/js/266.baac44a1.js"><link rel="prefetch" href="/assets/js/267.b6f584a5.js"><link rel="prefetch" href="/assets/js/268.013f92f7.js"><link rel="prefetch" href="/assets/js/269.706a27e5.js"><link rel="prefetch" href="/assets/js/27.9e25f953.js"><link rel="prefetch" href="/assets/js/270.397dc6f7.js"><link rel="prefetch" href="/assets/js/271.5f063e14.js"><link rel="prefetch" href="/assets/js/272.b88b9e6e.js"><link rel="prefetch" href="/assets/js/273.f7eeeb80.js"><link rel="prefetch" href="/assets/js/274.8d7d8c2a.js"><link rel="prefetch" href="/assets/js/275.167633d2.js"><link rel="prefetch" href="/assets/js/276.bf42d85f.js"><link rel="prefetch" href="/assets/js/277.195beb55.js"><link rel="prefetch" href="/assets/js/278.852d1996.js"><link rel="prefetch" href="/assets/js/279.a3fb5857.js"><link rel="prefetch" href="/assets/js/28.0a801078.js"><link rel="prefetch" href="/assets/js/280.de229c1d.js"><link rel="prefetch" href="/assets/js/281.47d676fa.js"><link rel="prefetch" href="/assets/js/282.1db3920a.js"><link rel="prefetch" href="/assets/js/283.0ed31a9c.js"><link rel="prefetch" href="/assets/js/284.d2f802aa.js"><link rel="prefetch" href="/assets/js/285.0a18923e.js"><link rel="prefetch" href="/assets/js/286.60438a30.js"><link rel="prefetch" href="/assets/js/287.6fa63573.js"><link rel="prefetch" href="/assets/js/288.4432c980.js"><link rel="prefetch" href="/assets/js/289.789f44e7.js"><link rel="prefetch" href="/assets/js/29.a31435b1.js"><link rel="prefetch" href="/assets/js/290.3c1f2e4c.js"><link rel="prefetch" href="/assets/js/291.a340398b.js"><link rel="prefetch" href="/assets/js/292.8568adc1.js"><link rel="prefetch" href="/assets/js/293.42107ac0.js"><link rel="prefetch" href="/assets/js/294.5fae363a.js"><link rel="prefetch" href="/assets/js/295.eb955643.js"><link rel="prefetch" href="/assets/js/296.77ae03d2.js"><link rel="prefetch" href="/assets/js/297.e548ba7e.js"><link rel="prefetch" href="/assets/js/298.d08bd092.js"><link rel="prefetch" href="/assets/js/299.a9495179.js"><link rel="prefetch" href="/assets/js/30.60649b66.js"><link rel="prefetch" href="/assets/js/300.1f1c6539.js"><link rel="prefetch" href="/assets/js/301.45e54d01.js"><link rel="prefetch" href="/assets/js/302.41fa5b16.js"><link rel="prefetch" href="/assets/js/303.50302303.js"><link rel="prefetch" href="/assets/js/304.45ec5f49.js"><link rel="prefetch" href="/assets/js/305.4667a075.js"><link rel="prefetch" href="/assets/js/306.9adbbd88.js"><link rel="prefetch" href="/assets/js/307.01fbd282.js"><link rel="prefetch" href="/assets/js/308.ee661372.js"><link rel="prefetch" href="/assets/js/309.71fd6514.js"><link rel="prefetch" href="/assets/js/31.b5e715ce.js"><link rel="prefetch" href="/assets/js/310.2c1b5f58.js"><link rel="prefetch" href="/assets/js/311.bf369b6f.js"><link rel="prefetch" href="/assets/js/312.ee6deb53.js"><link rel="prefetch" href="/assets/js/313.b173305e.js"><link rel="prefetch" href="/assets/js/314.9bf7681c.js"><link rel="prefetch" href="/assets/js/315.9dced4c4.js"><link rel="prefetch" href="/assets/js/316.d1625f8e.js"><link rel="prefetch" href="/assets/js/317.ff874148.js"><link rel="prefetch" href="/assets/js/318.bc83f98a.js"><link rel="prefetch" href="/assets/js/319.eb7b75c1.js"><link rel="prefetch" href="/assets/js/32.e5e702b0.js"><link rel="prefetch" href="/assets/js/320.017cca1c.js"><link rel="prefetch" href="/assets/js/321.e34387cb.js"><link rel="prefetch" href="/assets/js/322.5aae6989.js"><link rel="prefetch" href="/assets/js/323.e4fd51b3.js"><link rel="prefetch" href="/assets/js/324.1ba3ee32.js"><link rel="prefetch" href="/assets/js/325.21254638.js"><link rel="prefetch" href="/assets/js/326.377d3f46.js"><link rel="prefetch" href="/assets/js/327.7734ba1d.js"><link rel="prefetch" href="/assets/js/328.e9791163.js"><link rel="prefetch" href="/assets/js/329.8acd00bc.js"><link rel="prefetch" href="/assets/js/33.b678d537.js"><link rel="prefetch" href="/assets/js/330.6cff02ec.js"><link rel="prefetch" href="/assets/js/331.98ebbe7d.js"><link rel="prefetch" href="/assets/js/332.1d9d1a04.js"><link rel="prefetch" href="/assets/js/333.e8be9a85.js"><link rel="prefetch" href="/assets/js/334.677f7d89.js"><link rel="prefetch" href="/assets/js/335.9bca2b37.js"><link rel="prefetch" href="/assets/js/336.b2a7394a.js"><link rel="prefetch" href="/assets/js/337.0231a5b2.js"><link rel="prefetch" href="/assets/js/338.1979cb4d.js"><link rel="prefetch" href="/assets/js/339.4bb8f0a9.js"><link rel="prefetch" href="/assets/js/34.f1aa3803.js"><link rel="prefetch" href="/assets/js/340.f0fa3c52.js"><link rel="prefetch" href="/assets/js/341.f8178251.js"><link rel="prefetch" href="/assets/js/342.7dd47706.js"><link rel="prefetch" href="/assets/js/343.363f2cae.js"><link rel="prefetch" href="/assets/js/344.2b4d1572.js"><link rel="prefetch" href="/assets/js/345.54e08f16.js"><link rel="prefetch" href="/assets/js/346.541ef94e.js"><link rel="prefetch" href="/assets/js/347.1f8a56e7.js"><link rel="prefetch" href="/assets/js/348.ff08d1b4.js"><link rel="prefetch" href="/assets/js/349.97e1160f.js"><link rel="prefetch" href="/assets/js/35.5612ab6a.js"><link rel="prefetch" href="/assets/js/350.1fa64f48.js"><link rel="prefetch" href="/assets/js/351.0cdcbb68.js"><link rel="prefetch" href="/assets/js/352.04f35660.js"><link rel="prefetch" href="/assets/js/353.c63abb11.js"><link rel="prefetch" href="/assets/js/354.f07fe232.js"><link rel="prefetch" href="/assets/js/355.9db8e984.js"><link rel="prefetch" href="/assets/js/356.7e54a7f7.js"><link rel="prefetch" href="/assets/js/357.b8b2c19a.js"><link rel="prefetch" href="/assets/js/358.ec88593c.js"><link rel="prefetch" href="/assets/js/359.57a348e6.js"><link rel="prefetch" href="/assets/js/36.4e36f97e.js"><link rel="prefetch" href="/assets/js/360.f91d4985.js"><link rel="prefetch" href="/assets/js/361.fd0b896b.js"><link rel="prefetch" href="/assets/js/362.3078bc4c.js"><link rel="prefetch" href="/assets/js/363.970af9b1.js"><link rel="prefetch" href="/assets/js/364.ce305e49.js"><link rel="prefetch" href="/assets/js/365.228a2005.js"><link rel="prefetch" href="/assets/js/366.3e0ce2e8.js"><link rel="prefetch" href="/assets/js/367.dfba61c0.js"><link rel="prefetch" href="/assets/js/368.d4307f98.js"><link rel="prefetch" href="/assets/js/369.730e7097.js"><link rel="prefetch" href="/assets/js/37.13b65e5d.js"><link rel="prefetch" href="/assets/js/371.99346247.js"><link rel="prefetch" href="/assets/js/372.09676253.js"><link rel="prefetch" href="/assets/js/373.2a7b274a.js"><link rel="prefetch" href="/assets/js/374.e347ead4.js"><link rel="prefetch" href="/assets/js/375.f70bcedd.js"><link rel="prefetch" href="/assets/js/376.c776b0ed.js"><link rel="prefetch" href="/assets/js/377.3d81f722.js"><link rel="prefetch" href="/assets/js/378.a7f10c5f.js"><link rel="prefetch" href="/assets/js/379.b18f1c51.js"><link rel="prefetch" href="/assets/js/38.c6f83038.js"><link rel="prefetch" href="/assets/js/380.a84e788a.js"><link rel="prefetch" href="/assets/js/381.521f1a2b.js"><link rel="prefetch" href="/assets/js/382.10ebffdc.js"><link rel="prefetch" href="/assets/js/383.fa0c4858.js"><link rel="prefetch" href="/assets/js/384.4d3a1d3e.js"><link rel="prefetch" href="/assets/js/385.edbe545d.js"><link rel="prefetch" href="/assets/js/386.aa0e0479.js"><link rel="prefetch" href="/assets/js/387.d08b9da1.js"><link rel="prefetch" href="/assets/js/388.3cafa76f.js"><link rel="prefetch" href="/assets/js/389.1c150739.js"><link rel="prefetch" href="/assets/js/39.41707d32.js"><link rel="prefetch" href="/assets/js/390.e3c6dc5b.js"><link rel="prefetch" href="/assets/js/391.097ce5d5.js"><link rel="prefetch" href="/assets/js/392.b1450deb.js"><link rel="prefetch" href="/assets/js/393.a9be5042.js"><link rel="prefetch" href="/assets/js/394.0f496e89.js"><link rel="prefetch" href="/assets/js/395.d66b20d2.js"><link rel="prefetch" href="/assets/js/396.a238eb17.js"><link rel="prefetch" href="/assets/js/397.c76a0b8d.js"><link rel="prefetch" href="/assets/js/398.3812b640.js"><link rel="prefetch" href="/assets/js/399.e6940f90.js"><link rel="prefetch" href="/assets/js/4.9c4b1c6d.js"><link rel="prefetch" href="/assets/js/40.f82f0187.js"><link rel="prefetch" href="/assets/js/400.5e0cfb93.js"><link rel="prefetch" href="/assets/js/401.f613f2ba.js"><link rel="prefetch" href="/assets/js/402.be1f5783.js"><link rel="prefetch" href="/assets/js/403.33c1396d.js"><link rel="prefetch" href="/assets/js/404.562089b0.js"><link rel="prefetch" href="/assets/js/405.93f42baf.js"><link rel="prefetch" href="/assets/js/406.ba8d00d1.js"><link rel="prefetch" href="/assets/js/407.0150b19f.js"><link rel="prefetch" href="/assets/js/408.728a1d15.js"><link rel="prefetch" href="/assets/js/409.ef560ed7.js"><link rel="prefetch" href="/assets/js/41.b6799c44.js"><link rel="prefetch" href="/assets/js/410.d3f65621.js"><link rel="prefetch" href="/assets/js/411.07ef2c9f.js"><link rel="prefetch" href="/assets/js/412.4a1d8057.js"><link rel="prefetch" href="/assets/js/413.ebf9aafc.js"><link rel="prefetch" href="/assets/js/414.a5433120.js"><link rel="prefetch" href="/assets/js/415.4dcc07c7.js"><link rel="prefetch" href="/assets/js/416.11747f6b.js"><link rel="prefetch" href="/assets/js/417.5270e086.js"><link rel="prefetch" href="/assets/js/418.d5fc9d05.js"><link rel="prefetch" href="/assets/js/419.540dcd2a.js"><link rel="prefetch" href="/assets/js/42.e6b0aae2.js"><link rel="prefetch" href="/assets/js/420.28641617.js"><link rel="prefetch" href="/assets/js/421.a6c3c8af.js"><link rel="prefetch" href="/assets/js/422.52ab97a6.js"><link rel="prefetch" href="/assets/js/423.7c5da32e.js"><link rel="prefetch" href="/assets/js/424.d39b15e0.js"><link rel="prefetch" href="/assets/js/425.2c8fbc5a.js"><link rel="prefetch" href="/assets/js/426.b6957825.js"><link rel="prefetch" href="/assets/js/427.b96cf924.js"><link rel="prefetch" href="/assets/js/428.6440b235.js"><link rel="prefetch" href="/assets/js/429.57902fe0.js"><link rel="prefetch" href="/assets/js/43.3fff5a4c.js"><link rel="prefetch" href="/assets/js/430.04255b2f.js"><link rel="prefetch" href="/assets/js/431.321286eb.js"><link rel="prefetch" href="/assets/js/432.72fdf31f.js"><link rel="prefetch" href="/assets/js/433.52676bc7.js"><link rel="prefetch" href="/assets/js/434.7bc3fee7.js"><link rel="prefetch" href="/assets/js/435.deac35a6.js"><link rel="prefetch" href="/assets/js/436.46f753f4.js"><link rel="prefetch" href="/assets/js/437.6a675a68.js"><link rel="prefetch" href="/assets/js/438.e8c8ae5b.js"><link rel="prefetch" href="/assets/js/439.ba3f2700.js"><link rel="prefetch" href="/assets/js/44.fee39d6b.js"><link rel="prefetch" href="/assets/js/440.98a7bff0.js"><link rel="prefetch" href="/assets/js/441.e12292fb.js"><link rel="prefetch" href="/assets/js/442.08f60114.js"><link rel="prefetch" href="/assets/js/443.d5d255b9.js"><link rel="prefetch" href="/assets/js/444.01c13452.js"><link rel="prefetch" href="/assets/js/445.954c3b0b.js"><link rel="prefetch" href="/assets/js/446.81521199.js"><link rel="prefetch" href="/assets/js/447.0cf2269e.js"><link rel="prefetch" href="/assets/js/448.fb62b763.js"><link rel="prefetch" href="/assets/js/449.2fd7ec4e.js"><link rel="prefetch" href="/assets/js/45.244b7680.js"><link rel="prefetch" href="/assets/js/450.3ff3ce7b.js"><link rel="prefetch" href="/assets/js/451.4b455f4a.js"><link rel="prefetch" href="/assets/js/452.51fbf6e4.js"><link rel="prefetch" href="/assets/js/453.4d5d4319.js"><link rel="prefetch" href="/assets/js/454.99948bc3.js"><link rel="prefetch" href="/assets/js/455.d1380266.js"><link rel="prefetch" href="/assets/js/456.22423caf.js"><link rel="prefetch" href="/assets/js/457.05a6e43b.js"><link rel="prefetch" href="/assets/js/458.2a93e9bc.js"><link rel="prefetch" href="/assets/js/459.dfc3d492.js"><link rel="prefetch" href="/assets/js/46.539f062d.js"><link rel="prefetch" href="/assets/js/460.2a50d5c4.js"><link rel="prefetch" href="/assets/js/461.07548ac3.js"><link rel="prefetch" href="/assets/js/462.214e91ce.js"><link rel="prefetch" href="/assets/js/463.414bc138.js"><link rel="prefetch" href="/assets/js/464.779a26ec.js"><link rel="prefetch" href="/assets/js/465.c61d57fa.js"><link rel="prefetch" href="/assets/js/466.ab4c1900.js"><link rel="prefetch" href="/assets/js/467.6398c8fc.js"><link rel="prefetch" href="/assets/js/468.f013763e.js"><link rel="prefetch" href="/assets/js/469.40bcf372.js"><link rel="prefetch" href="/assets/js/47.a8742825.js"><link rel="prefetch" href="/assets/js/470.ba1d5a08.js"><link rel="prefetch" href="/assets/js/471.9842c3d9.js"><link rel="prefetch" href="/assets/js/472.887667b1.js"><link rel="prefetch" href="/assets/js/473.ac9f4dc8.js"><link rel="prefetch" href="/assets/js/474.c950558a.js"><link rel="prefetch" href="/assets/js/475.ec6929d7.js"><link rel="prefetch" href="/assets/js/476.d351ffef.js"><link rel="prefetch" href="/assets/js/477.cbb436f4.js"><link rel="prefetch" href="/assets/js/478.10a8af05.js"><link rel="prefetch" href="/assets/js/479.3e21eec2.js"><link rel="prefetch" href="/assets/js/48.656f2900.js"><link rel="prefetch" href="/assets/js/480.2889f790.js"><link rel="prefetch" href="/assets/js/481.6504abc3.js"><link rel="prefetch" href="/assets/js/482.25c23f5a.js"><link rel="prefetch" href="/assets/js/483.11c430e0.js"><link rel="prefetch" href="/assets/js/484.4fb1d507.js"><link rel="prefetch" href="/assets/js/485.1ecbb4e0.js"><link rel="prefetch" href="/assets/js/486.a15cc699.js"><link rel="prefetch" href="/assets/js/487.b4a9526d.js"><link rel="prefetch" href="/assets/js/488.85d13879.js"><link rel="prefetch" href="/assets/js/489.3a566e3d.js"><link rel="prefetch" href="/assets/js/49.f271ac34.js"><link rel="prefetch" href="/assets/js/490.347d23af.js"><link rel="prefetch" href="/assets/js/491.558b7aa9.js"><link rel="prefetch" href="/assets/js/492.af9c4c53.js"><link rel="prefetch" href="/assets/js/493.f89bdb3c.js"><link rel="prefetch" href="/assets/js/494.a0142c98.js"><link rel="prefetch" href="/assets/js/495.d3de8850.js"><link rel="prefetch" href="/assets/js/496.d48c6630.js"><link rel="prefetch" href="/assets/js/497.3b9635e2.js"><link rel="prefetch" href="/assets/js/498.f587a80e.js"><link rel="prefetch" href="/assets/js/499.22f6be18.js"><link rel="prefetch" href="/assets/js/5.2a4451ec.js"><link rel="prefetch" href="/assets/js/50.7d8944cd.js"><link rel="prefetch" href="/assets/js/500.d054de5c.js"><link rel="prefetch" href="/assets/js/501.954e1b5c.js"><link rel="prefetch" href="/assets/js/502.4b184e51.js"><link rel="prefetch" href="/assets/js/503.10334ca5.js"><link rel="prefetch" href="/assets/js/504.0e074cd3.js"><link rel="prefetch" href="/assets/js/505.4993e90d.js"><link rel="prefetch" href="/assets/js/506.6f94a2f8.js"><link rel="prefetch" href="/assets/js/507.b255fcfd.js"><link rel="prefetch" href="/assets/js/508.95c9551e.js"><link rel="prefetch" href="/assets/js/509.1d2ab0fb.js"><link rel="prefetch" href="/assets/js/51.fd01b1a1.js"><link rel="prefetch" href="/assets/js/510.36c66e50.js"><link rel="prefetch" href="/assets/js/511.caf2e589.js"><link rel="prefetch" href="/assets/js/512.133bca04.js"><link rel="prefetch" href="/assets/js/513.e3f62ca2.js"><link rel="prefetch" href="/assets/js/514.f17c4a44.js"><link rel="prefetch" href="/assets/js/515.f637b155.js"><link rel="prefetch" href="/assets/js/516.3cccca96.js"><link rel="prefetch" href="/assets/js/517.80c43b59.js"><link rel="prefetch" href="/assets/js/518.f3438412.js"><link rel="prefetch" href="/assets/js/519.5a0ef98b.js"><link rel="prefetch" href="/assets/js/52.10d8a15b.js"><link rel="prefetch" href="/assets/js/520.d83038f1.js"><link rel="prefetch" href="/assets/js/521.4726d233.js"><link rel="prefetch" href="/assets/js/522.045aff30.js"><link rel="prefetch" href="/assets/js/523.9d9b45b5.js"><link rel="prefetch" href="/assets/js/524.86a7c6cf.js"><link rel="prefetch" href="/assets/js/525.1d6e7b79.js"><link rel="prefetch" href="/assets/js/526.c365bd67.js"><link rel="prefetch" href="/assets/js/527.555f8b61.js"><link rel="prefetch" href="/assets/js/528.690272cc.js"><link rel="prefetch" href="/assets/js/529.7f05b847.js"><link rel="prefetch" href="/assets/js/53.79f66cea.js"><link rel="prefetch" href="/assets/js/530.3fb31398.js"><link rel="prefetch" href="/assets/js/531.54b0ee66.js"><link rel="prefetch" href="/assets/js/532.42a967ca.js"><link rel="prefetch" href="/assets/js/54.1ec48dc5.js"><link rel="prefetch" href="/assets/js/55.9d4b8667.js"><link rel="prefetch" href="/assets/js/56.aa94202c.js"><link rel="prefetch" href="/assets/js/57.dd80489d.js"><link rel="prefetch" href="/assets/js/58.9af3c40d.js"><link rel="prefetch" href="/assets/js/59.70e0291b.js"><link rel="prefetch" href="/assets/js/6.3450075a.js"><link rel="prefetch" href="/assets/js/60.53b7d88b.js"><link rel="prefetch" href="/assets/js/61.b70ccd57.js"><link rel="prefetch" href="/assets/js/62.eef65e9b.js"><link rel="prefetch" href="/assets/js/63.3a66528e.js"><link rel="prefetch" href="/assets/js/64.ed6b77b6.js"><link rel="prefetch" href="/assets/js/65.5573ce3d.js"><link rel="prefetch" href="/assets/js/66.aa4ead2c.js"><link rel="prefetch" href="/assets/js/67.29edf638.js"><link rel="prefetch" href="/assets/js/68.38ac76fc.js"><link rel="prefetch" href="/assets/js/69.7f8c7118.js"><link rel="prefetch" href="/assets/js/7.c5c54fb4.js"><link rel="prefetch" href="/assets/js/70.368e2128.js"><link rel="prefetch" href="/assets/js/71.cf483d39.js"><link rel="prefetch" href="/assets/js/72.b095c9c5.js"><link rel="prefetch" href="/assets/js/73.7f2ffe57.js"><link rel="prefetch" href="/assets/js/74.d67c3927.js"><link rel="prefetch" href="/assets/js/75.d4945299.js"><link rel="prefetch" href="/assets/js/76.f01b8b07.js"><link rel="prefetch" href="/assets/js/77.3c1e294c.js"><link rel="prefetch" href="/assets/js/78.cfcd53d4.js"><link rel="prefetch" href="/assets/js/79.a50c96bd.js"><link rel="prefetch" href="/assets/js/8.68d2fe5c.js"><link rel="prefetch" href="/assets/js/80.8358bd99.js"><link rel="prefetch" href="/assets/js/81.754e7cd2.js"><link rel="prefetch" href="/assets/js/82.e42aff88.js"><link rel="prefetch" href="/assets/js/83.152a1582.js"><link rel="prefetch" href="/assets/js/84.4867883c.js"><link rel="prefetch" href="/assets/js/85.6b2afa69.js"><link rel="prefetch" href="/assets/js/86.3e058a7a.js"><link rel="prefetch" href="/assets/js/87.cf9a4fcf.js"><link rel="prefetch" href="/assets/js/88.dc32204f.js"><link rel="prefetch" href="/assets/js/89.fb10ca17.js"><link rel="prefetch" href="/assets/js/9.e4a451d3.js"><link rel="prefetch" href="/assets/js/90.7f184d9a.js"><link rel="prefetch" href="/assets/js/91.35f464f6.js"><link rel="prefetch" href="/assets/js/92.e45a3d68.js"><link rel="prefetch" href="/assets/js/93.0d192890.js"><link rel="prefetch" href="/assets/js/94.13f91cee.js"><link rel="prefetch" href="/assets/js/95.732898b6.js"><link rel="prefetch" href="/assets/js/96.10bfabc4.js"><link rel="prefetch" href="/assets/js/97.20f5d113.js"><link rel="prefetch" href="/assets/js/98.49efa8b4.js"><link rel="prefetch" href="/assets/js/99.9abce7a4.js"><link rel="prefetch" href="/assets/js/vendors~docsearch.eff714eb.js">
    <link rel="stylesheet" href="/assets/css/0.styles.ccadf850.css">
  </head>
  <body>
    <div id="app" data-server-rendered="true"><div class="theme-container"><header class="navbar"><div class="sidebar-button"><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" role="img" viewBox="0 0 448 512" class="icon"><path fill="currentColor" d="M436 124H12c-6.627 0-12-5.373-12-12V80c0-6.627 5.373-12 12-12h424c6.627 0 12 5.373 12 12v32c0 6.627-5.373 12-12 12zm0 160H12c-6.627 0-12-5.373-12-12v-32c0-6.627 5.373-12 12-12h424c6.627 0 12 5.373 12 12v32c0 6.627-5.373 12-12 12zm0 160H12c-6.627 0-12-5.373-12-12v-32c0-6.627 5.373-12 12-12h424c6.627 0 12 5.373 12 12v32c0 6.627-5.373 12-12 12z"></path></svg></div> <a href="/zh/" class="home-link router-link-active"><img src="/img/logo.png" alt=" " class="logo"></a> <div class="links"><div class="search-box"><input aria-label="Search" autocomplete="off" spellcheck="false" value=""> <!----></div> <nav class="nav-links can-hide"><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">文档</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/zh/UserGuide/Master/Get Started/QuickStart.html" class="nav-link">In progress</a></li><li class="dropdown-item"><!----> <a href="/zh/UserGuide/V0.11.x/Get Started/QuickStart.html" class="nav-link">V0.11.x</a></li><li class="dropdown-item"><!----> <a href="/zh/UserGuide/V0.10.x/Get Started/QuickStart.html" class="nav-link">V0.10.x</a></li><li class="dropdown-item"><!----> <a href="/zh/UserGuide/V0.9.x/0-Get Started/1-QuickStart.html" class="nav-link">V0.9.x</a></li><li class="dropdown-item"><!----> <a href="/zh/UserGuide/V0.8.x/0-Get Started/1-QuickStart.html" class="nav-link">V0.8.x</a></li></ul></div></div><div class="nav-item"><a href="/zh/SystemDesign/Architecture/Architecture.html" class="nav-link">系统设计</a></div><div class="nav-item"><a href="/zh/Download/" class="nav-link">下载</a></div><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">社区</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="https://cwiki.apache.org/confluence/display/iotdb" class="nav-link external">
  Wiki
  <!----></a></li><li class="dropdown-item"><!----> <a href="/zh/Community/Community-Project Committers.html" class="nav-link">开发人员</a></li><li class="dropdown-item"><!----> <a href="/zh/Community/Community-Powered By.html" class="nav-link">技术支持</a></li><li class="dropdown-item"><!----> <a href="/Community/Materials.html" class="nav-link">活动与报告</a></li><li class="dropdown-item"><!----> <a href="/zh/Community/Feedback.html" class="nav-link">交流与反馈</a></li></ul></div></div><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">开发</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/zh/Development/VoteRelease.html" class="nav-link">如何投票</a></li><li class="dropdown-item"><!----> <a href="/zh/Development/HowToCommit.html" class="nav-link">如何提交代码</a></li><li class="dropdown-item"><!----> <a href="/zh/Development/Committer.html" class="nav-link">成为Committer</a></li><li class="dropdown-item"><!----> <a href="/zh/Development/ContributeGuide.html" class="nav-link">项目开发指南</a></li><li class="dropdown-item"><!----> <a href="/zh/Development/format-changelist.html" class="nav-link">TsFile的更改列表</a></li><li class="dropdown-item"><!----> <a href="/zh/Development/rpc-changelist.html" class="nav-link">RPC变更清单</a></li></ul></div></div><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">ASF</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="http://www.apache.org/" class="nav-link external">
  基金会
  <!----></a></li><li class="dropdown-item"><!----> <a href="http://www.apache.org/licenses/" class="nav-link external">
  许可证
  <!----></a></li><li class="dropdown-item"><!----> <a href="http://www.apache.org/security/" class="nav-link external">
  安全
  <!----></a></li><li class="dropdown-item"><!----> <a href="http://www.apache.org/foundation/sponsorship.html" class="nav-link external">
  赞助
  <!----></a></li><li class="dropdown-item"><!----> <a href="http://www.apache.org/foundation/thanks.html" class="nav-link external">
  致谢
  <!----></a></li><li class="dropdown-item"><!----> <a href="http://www.apache.org/events/current-event" class="nav-link external">
  活动
  <!----></a></li></ul></div></div><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">语言</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/UserGuide/Master/System Tools/Watermark Tool.html" class="nav-link">English</a></li><li class="dropdown-item"><!----> <a href="/zh/UserGuide/Master/System Tools/Watermark Tool.html" class="nav-link">简体中文</a></li></ul></div></div> <a href="https://github.com/apache/iotdb.git" target="_blank" rel="noopener noreferrer" class="repo-link">
    gitHub
    <span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></nav></div></header> <div class="sidebar-mask"></div> <aside class="sidebar"><nav class="nav-links"><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">文档</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/zh/UserGuide/Master/Get Started/QuickStart.html" class="nav-link">In progress</a></li><li class="dropdown-item"><!----> <a href="/zh/UserGuide/V0.11.x/Get Started/QuickStart.html" class="nav-link">V0.11.x</a></li><li class="dropdown-item"><!----> <a href="/zh/UserGuide/V0.10.x/Get Started/QuickStart.html" class="nav-link">V0.10.x</a></li><li class="dropdown-item"><!----> <a href="/zh/UserGuide/V0.9.x/0-Get Started/1-QuickStart.html" class="nav-link">V0.9.x</a></li><li class="dropdown-item"><!----> <a href="/zh/UserGuide/V0.8.x/0-Get Started/1-QuickStart.html" class="nav-link">V0.8.x</a></li></ul></div></div><div class="nav-item"><a href="/zh/SystemDesign/Architecture/Architecture.html" class="nav-link">系统设计</a></div><div class="nav-item"><a href="/zh/Download/" class="nav-link">下载</a></div><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">社区</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="https://cwiki.apache.org/confluence/display/iotdb" class="nav-link external">
  Wiki
  <!----></a></li><li class="dropdown-item"><!----> <a href="/zh/Community/Community-Project Committers.html" class="nav-link">开发人员</a></li><li class="dropdown-item"><!----> <a href="/zh/Community/Community-Powered By.html" class="nav-link">技术支持</a></li><li class="dropdown-item"><!----> <a href="/Community/Materials.html" class="nav-link">活动与报告</a></li><li class="dropdown-item"><!----> <a href="/zh/Community/Feedback.html" class="nav-link">交流与反馈</a></li></ul></div></div><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">开发</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/zh/Development/VoteRelease.html" class="nav-link">如何投票</a></li><li class="dropdown-item"><!----> <a href="/zh/Development/HowToCommit.html" class="nav-link">如何提交代码</a></li><li class="dropdown-item"><!----> <a href="/zh/Development/Committer.html" class="nav-link">成为Committer</a></li><li class="dropdown-item"><!----> <a href="/zh/Development/ContributeGuide.html" class="nav-link">项目开发指南</a></li><li class="dropdown-item"><!----> <a href="/zh/Development/format-changelist.html" class="nav-link">TsFile的更改列表</a></li><li class="dropdown-item"><!----> <a href="/zh/Development/rpc-changelist.html" class="nav-link">RPC变更清单</a></li></ul></div></div><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">ASF</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="http://www.apache.org/" class="nav-link external">
  基金会
  <!----></a></li><li class="dropdown-item"><!----> <a href="http://www.apache.org/licenses/" class="nav-link external">
  许可证
  <!----></a></li><li class="dropdown-item"><!----> <a href="http://www.apache.org/security/" class="nav-link external">
  安全
  <!----></a></li><li class="dropdown-item"><!----> <a href="http://www.apache.org/foundation/sponsorship.html" class="nav-link external">
  赞助
  <!----></a></li><li class="dropdown-item"><!----> <a href="http://www.apache.org/foundation/thanks.html" class="nav-link external">
  致谢
  <!----></a></li><li class="dropdown-item"><!----> <a href="http://www.apache.org/events/current-event" class="nav-link external">
  活动
  <!----></a></li></ul></div></div><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">语言</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/UserGuide/Master/System Tools/Watermark Tool.html" class="nav-link">English</a></li><li class="dropdown-item"><!----> <a href="/zh/UserGuide/Master/System Tools/Watermark Tool.html" class="nav-link">简体中文</a></li></ul></div></div> <a href="https://github.com/apache/iotdb.git" target="_blank" rel="noopener noreferrer" class="repo-link">
    gitHub
    <span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></nav>  <ul class="sidebar-links"><li><section class="sidebar-group depth-0"><p class="sidebar-heading"><span>IoTDB用户手册 (In progress)</span> <!----></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>开始</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>概述</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>概念</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>服务器端</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>客户端</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>操作指南</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading open"><span>系统工具</span> <span class="arrow down"></span></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/zh/UserGuide/Master/System Tools/Sync Tool.html" class="sidebar-link">同步工具</a></li><li><a href="/zh/UserGuide/Master/System Tools/JMX Tool.html" class="sidebar-link">JMX工具</a></li><li><a href="/zh/UserGuide/Master/System Tools/Watermark Tool.html" class="active sidebar-link">水印工具</a></li><li><a href="/zh/UserGuide/Master/System Tools/Query History Visualization Tool.html" class="sidebar-link">查询历史可视化工具</a></li><li><a href="/zh/UserGuide/Master/System Tools/Monitor and Log Tools.html" class="sidebar-link">监控与日志工具</a></li><li><a href="/zh/UserGuide/Master/System Tools/Load External Tsfile.html" class="sidebar-link">加载外部tsfile文件</a></li><li><a href="/zh/UserGuide/Master/System Tools/Performance Tracing Tool.html" class="sidebar-link">性能追踪工具</a></li><li><a href="/zh/UserGuide/Master/System Tools/MLogParser Tool.html" class="sidebar-link">MLog解析工具</a></li><li><a href="/zh/UserGuide/Master/System Tools/NodeTool.html" class="sidebar-link">集群状态工具</a></li><li><a href="/zh/UserGuide/Master/System Tools/CSV Tool.html" class="sidebar-link">CSV工具</a></li></ul></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>生态集成</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>系统设计</span> <span class="arrow right"></span></p> <!----></section></li></ul> </aside> <main class="page"> <div class="content content__default"><h1 id="水印工具"><a href="#水印工具" class="header-anchor">#</a> 水印工具</h1> <p><strong>目录</strong></p> <ol><li><p>水印嵌入</p> <p>1.1 配置</p> <p>1.2 使用示例</p></li> <li><p>水印检测</p></li></ol> <p>这个工具提供了 1）IoTDB查询结果水印嵌入功能，2）可疑数据的水印检测功能。</p> <h2 id="_1-水印嵌入"><a href="#_1-水印嵌入" class="header-anchor">#</a> 1. 水印嵌入</h2> <h3 id="_1-1-配置"><a href="#_1-1-配置" class="header-anchor">#</a> 1.1 配置</h3> <p>IoTDB默认关闭水印嵌入功能。为了使用这个功能，第一步要做的事情是修改配置文件<code>iotdb-engine.properties</code>中的以下各项：</p> <table><thead><tr><th>名称</th> <th>示例</th> <th>解释</th></tr></thead> <tbody><tr><td>watermark_module_opened</td> <td>false</td> <td><code>true</code>打开水印嵌入功能; <code>false</code>关闭</td></tr> <tr><td>watermark_secret_key</td> <td>IoTDB*2019@Beijing</td> <td>自定义密钥</td></tr> <tr><td>watermark_bit_string</td> <td>100101110100</td> <td>要被嵌入的0-1比特串</td></tr> <tr><td>watermark_method</td> <td>GroupBasedLSBMethod(embed_row_cycle=2,embed_lsb_num=5)</td> <td>指定水印算法及其参数</td></tr></tbody></table> <p>注意：</p> <ul><li><code>watermark_module_opened</code>: 如果您想使用水印嵌入功能，请将其设置成<code>true</code>。</li> <li><code>watermark_secret_key</code>: 不能使用字符 '&amp;'。密钥长度没有限制，一般来说密钥越长，攻击难度就越高。</li> <li><code>watermark_bit_string</code>: 比特串长度没有限制（除了不能为空字符串），但是当长度过短时，水印检测可能达不到要求的显著性水平。</li> <li><code>watermark_method</code>: 现在仅支持一种算法GroupBasedLSBMethod，因此您实际上可以修改的只有这个算法的两个参数<code>embed_row_cycle</code>和<code>embed_lsb_num</code>的值：
<ul><li>均是正整数</li> <li><code>embed_row_cycle</code>控制了被嵌入水印的行占总行数的比例。<code>embed_row_cycle</code>越小，被嵌入水印的行的比例就越大。当<code>embed_row_cycle</code>等于1的时候，所有的行都将嵌入水印。</li> <li>GroupBasedLSBMethod使用LSB嵌入。<code>embed_lsb_num</code>控制了允许嵌入水印的最低有效位的数量。<code>embed_lsb_num</code>越大，数值的可变化范围就越大。</li></ul></li> <li><code>watermark_secret_key</code>, <code>watermark_bit_string</code>和<code>watermark_method</code>都不应该被攻击者获得。您需要自己负责配置文件<code>iotdb-engine.properties</code>的安全管理。</li></ul> <h3 id="_1-2-使用示例"><a href="#_1-2-使用示例" class="header-anchor">#</a> 1.2 使用示例</h3> <h4 id="第一步-创建一个新用户alice-授予读权限-然后查询"><a href="#第一步-创建一个新用户alice-授予读权限-然后查询" class="header-anchor">#</a> 第一步：创建一个新用户Alice，授予读权限，然后查询</h4> <p>一个新创建的用户默认不使用水印。因此查询结果就是数据库中的原始数据。</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>.\start-cli.bat -u root -pw root
create user Alice 1234
grant user Alice privileges 'READ_TIMESERIES' on root.vehicle
exit

.\start-cli.bat -u Alice -pw 1234
select * from root
+-----------------------------------+------------------+
|                               Time|root.vehicle.d0.s0|
+-----------------------------------+------------------+
|      1970-01-01T08:00:00.001+08:00|              21.5|
|      1970-01-01T08:00:00.002+08:00|              22.5|
|      1970-01-01T08:00:00.003+08:00|              23.5|
|      1970-01-01T08:00:00.004+08:00|              24.5|
|      1970-01-01T08:00:00.005+08:00|              25.5|
|      1970-01-01T08:00:00.006+08:00|              26.5|
|      1970-01-01T08:00:00.007+08:00|              27.5|
|      1970-01-01T08:00:00.008+08:00|              28.5|
|      1970-01-01T08:00:00.009+08:00|              29.5|
|      1970-01-01T08:00:00.010+08:00|              30.5|
|      1970-01-01T08:00:00.011+08:00|              31.5|
|      1970-01-01T08:00:00.012+08:00|              32.5|
|      1970-01-01T08:00:00.013+08:00|              33.5|
|      1970-01-01T08:00:00.014+08:00|              34.5|
|      1970-01-01T08:00:00.015+08:00|              35.5|
|      1970-01-01T08:00:00.016+08:00|              36.5|
|      1970-01-01T08:00:00.017+08:00|              37.5|
|      1970-01-01T08:00:00.018+08:00|              38.5|
|      1970-01-01T08:00:00.019+08:00|              39.5|
|      1970-01-01T08:00:00.020+08:00|              40.5|
|      1970-01-01T08:00:00.021+08:00|              41.5|
|      1970-01-01T08:00:00.022+08:00|              42.5|
|      1970-01-01T08:00:00.023+08:00|              43.5|
|      1970-01-01T08:00:00.024+08:00|              44.5|
|      1970-01-01T08:00:00.025+08:00|              45.5|
|      1970-01-01T08:00:00.026+08:00|              46.5|
|      1970-01-01T08:00:00.027+08:00|              47.5|
|      1970-01-01T08:00:00.028+08:00|              48.5|
|      1970-01-01T08:00:00.029+08:00|              49.5|
|      1970-01-01T08:00:00.030+08:00|              50.5|
|      1970-01-01T08:00:00.031+08:00|              51.5|
|      1970-01-01T08:00:00.032+08:00|              52.5|
|      1970-01-01T08:00:00.033+08:00|              53.5|
+-----------------------------------+------------------+
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br><span class="line-number">29</span><br><span class="line-number">30</span><br><span class="line-number">31</span><br><span class="line-number">32</span><br><span class="line-number">33</span><br><span class="line-number">34</span><br><span class="line-number">35</span><br><span class="line-number">36</span><br><span class="line-number">37</span><br><span class="line-number">38</span><br><span class="line-number">39</span><br><span class="line-number">40</span><br><span class="line-number">41</span><br><span class="line-number">42</span><br><span class="line-number">43</span><br><span class="line-number">44</span><br></div></div><h4 id="第二步-给alice施加水印嵌入"><a href="#第二步-给alice施加水印嵌入" class="header-anchor">#</a> 第二步：给Alice施加水印嵌入</h4> <p>sql用法：<code>grant watermark_embedding to Alice</code></p> <p>您可以使用<code>grant watermark_embedding to user1,user2,...</code>来同时给多个用户施加水印嵌入。</p> <p>只有root用户有权限运行该指令。在root给Alice施加水印嵌入之后，Alice的所有查询结果都将被嵌入水印。</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>.\start-cli.bat -u root -pw root
grant watermark_embedding to Alice
exit

.\start-cli.bat -u Alice -pw 1234
select * from root

+-----------------------------------+------------------+
|                               Time|root.vehicle.d0.s0|
+-----------------------------------+------------------+
|      1970-01-01T08:00:00.001+08:00|              21.5|
|      1970-01-01T08:00:00.002+08:00|              22.5|
|      1970-01-01T08:00:00.003+08:00|         23.500008|
|      1970-01-01T08:00:00.004+08:00|         24.500015|
|      1970-01-01T08:00:00.005+08:00|              25.5|
|      1970-01-01T08:00:00.006+08:00|         26.500015|
|      1970-01-01T08:00:00.007+08:00|              27.5|
|      1970-01-01T08:00:00.008+08:00|         28.500004|
|      1970-01-01T08:00:00.009+08:00|              29.5|
|      1970-01-01T08:00:00.010+08:00|              30.5|
|      1970-01-01T08:00:00.011+08:00|              31.5|
|      1970-01-01T08:00:00.012+08:00|              32.5|
|      1970-01-01T08:00:00.013+08:00|              33.5|
|      1970-01-01T08:00:00.014+08:00|              34.5|
|      1970-01-01T08:00:00.015+08:00|         35.500004|
|      1970-01-01T08:00:00.016+08:00|              36.5|
|      1970-01-01T08:00:00.017+08:00|              37.5|
|      1970-01-01T08:00:00.018+08:00|              38.5|
|      1970-01-01T08:00:00.019+08:00|              39.5|
|      1970-01-01T08:00:00.020+08:00|              40.5|
|      1970-01-01T08:00:00.021+08:00|              41.5|
|      1970-01-01T08:00:00.022+08:00|         42.500015|
|      1970-01-01T08:00:00.023+08:00|              43.5|
|      1970-01-01T08:00:00.024+08:00|         44.500008|
|      1970-01-01T08:00:00.025+08:00|          45.50003|
|      1970-01-01T08:00:00.026+08:00|         46.500008|
|      1970-01-01T08:00:00.027+08:00|         47.500008|
|      1970-01-01T08:00:00.028+08:00|              48.5|
|      1970-01-01T08:00:00.029+08:00|              49.5|
|      1970-01-01T08:00:00.030+08:00|              50.5|
|      1970-01-01T08:00:00.031+08:00|         51.500008|
|      1970-01-01T08:00:00.032+08:00|              52.5|
|      1970-01-01T08:00:00.033+08:00|              53.5|
+-----------------------------------+------------------+
</code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br><span class="line-number">29</span><br><span class="line-number">30</span><br><span class="line-number">31</span><br><span class="line-number">32</span><br><span class="line-number">33</span><br><span class="line-number">34</span><br><span class="line-number">35</span><br><span class="line-number">36</span><br><span class="line-number">37</span><br><span class="line-number">38</span><br><span class="line-number">39</span><br><span class="line-number">40</span><br><span class="line-number">41</span><br><span class="line-number">42</span><br><span class="line-number">43</span><br><span class="line-number">44</span><br></div></div><h4 id="第三步-撤销alice的水印嵌入"><a href="#第三步-撤销alice的水印嵌入" class="header-anchor">#</a> 第三步：撤销Alice的水印嵌入</h4> <p>sql用法：<code>revoke watermark_embedding from Alice</code></p> <p>您可以使用<code>revoke watermark_embedding from user1,user2,...</code>来同时撤销多个用户的水印嵌入。</p> <p>只有root用户有权限运行该指令。在root撤销Alice的水印嵌入之后，Alice的所有查询结果就又是数据库中的原始数据了。</p> <h2 id="_2-水印检测"><a href="#_2-水印检测" class="header-anchor">#</a> 2. 水印检测</h2> <p><code>detect-watermark.sh</code> 和 <code>detect-watermark.bat</code> 是给不同平台提供的功能相同的工具脚本。</p> <p>用法： ./detect-watermark.sh [filePath] [secretKey] [watermarkBitString] [embed_row_cycle] [embed_lsb_num] [alpha] [columnIndex] [dataType: int/float/double]</p> <p>示例： ./detect-watermark.sh /home/data/dump1.csv IoTDB*2019@Beijing 100101110100 2 5 0.05 1 float</p> <table><thead><tr><th>Args</th> <th>示例</th> <th>解释</th></tr></thead> <tbody><tr><td>filePath</td> <td>/home/data/dump1.csv</td> <td>可疑数据的文件路径</td></tr> <tr><td>secretKey</td> <td>IoTDB*2019@Beijing</td> <td>参见水印嵌入小节</td></tr> <tr><td>watermarkBitString</td> <td>100101110100</td> <td>参见水印嵌入小节</td></tr> <tr><td>embed_row_cycle</td> <td>2</td> <td>参见水印嵌入小节</td></tr> <tr><td>embed_lsb_num</td> <td>5</td> <td>参见水印嵌入小节</td></tr> <tr><td>alpha</td> <td>0.05</td> <td>显著性水平</td></tr> <tr><td>columnIndex</td> <td>1</td> <td>指定可疑数据的某一列进行检测</td></tr> <tr><td>dataType</td> <td>float</td> <td>指定检测列的数据类型；int/float/double任选其一</td></tr></tbody></table> <p>注意：</p> <ul><li><p><code>filePath</code>: 您可以使用export-csv工具来生成这样的数据文件。第一行是表头， 第一列是时间列。文件中的数据示例如下：</p> <table><thead><tr><th>Time</th> <th>root.vehicle.d0.s1</th> <th>root.vehicle.d0.s1</th></tr></thead> <tbody><tr><td>1970-01-01T08:00:00.001+08:00</td> <td>100</td> <td>null</td></tr> <tr><td>...</td> <td>...</td> <td>...</td></tr></tbody></table></li> <li><p><code>watermark_secret_key</code>, <code>watermark_bit_string</code>, <code>embed_row_cycle</code>和<code>embed_lsb_num</code>应该和水印嵌入过程使用的值保持一致。</p></li> <li><p><code>alpha</code>: 取值范围[0,1]。水印检测基于显著性检验，<code>alpha</code>越小，没有嵌入水印的数据被检测成嵌入水印的可能性越低，从而检测出嵌入水印的结果的可信度越高。</p></li> <li><p><code>columnIndex</code>: 正整数</p></li></ul></div> <div class="page-nav"><p class="inner"><span class="prev">
        ←
        <a href="/zh/UserGuide/Master/System Tools/JMX Tool.html" class="prev">
          JMX工具
        </a></span> <span class="next"><a href="/zh/UserGuide/Master/System Tools/Query History Visualization Tool.html">
          查询历史可视化工具
        </a>
        →
      </span></p></div> <p style="text-align: center;">Copyright © 2021 The Apache Software Foundation.<br>
     Apache and the Apache feather logo are trademarks of The Apache Software Foundation</p> <p style="text-align: center; margin-top: 10px; color: #444">
    Contact us: Join QQ Group 659990460 | Add friend <i>tietouqiao</i> and be invited to Wechat Group<br>
    see <a href="https://github.com/apache/iotdb/issues/1995">Join the community</a> for more</p></main></div><div class="global-ui"></div></div>
    <script src="/assets/js/app.fe44b663.js" defer></script><script src="/assets/js/3.5626571b.js" defer></script><script src="/assets/js/370.e7a52728.js" defer></script>
  </body>
</html>