| <!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 1.8.0"> |
| <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.679f71b6.css" as="style"><link rel="preload" href="/assets/js/app.9d485032.js" as="script"><link rel="preload" href="/assets/js/3.80bccc99.js" as="script"><link rel="preload" href="/assets/js/381.4be43bef.js" as="script"><link rel="prefetch" href="/assets/js/10.80a35593.js"><link rel="prefetch" href="/assets/js/100.29307610.js"><link rel="prefetch" href="/assets/js/101.907577b4.js"><link rel="prefetch" href="/assets/js/102.37515932.js"><link rel="prefetch" href="/assets/js/103.011a72fd.js"><link rel="prefetch" href="/assets/js/104.28c671f4.js"><link rel="prefetch" href="/assets/js/105.3e6917b2.js"><link rel="prefetch" href="/assets/js/106.e1245bb9.js"><link rel="prefetch" href="/assets/js/107.6ba60b87.js"><link rel="prefetch" href="/assets/js/108.ee0de252.js"><link rel="prefetch" href="/assets/js/109.ff015e04.js"><link rel="prefetch" href="/assets/js/11.d8e8f747.js"><link rel="prefetch" href="/assets/js/110.7c2bd3a4.js"><link rel="prefetch" href="/assets/js/111.2ac401e3.js"><link rel="prefetch" href="/assets/js/112.d3d33936.js"><link rel="prefetch" href="/assets/js/113.d20e71c4.js"><link rel="prefetch" href="/assets/js/114.b18c6e29.js"><link rel="prefetch" href="/assets/js/115.7939b45e.js"><link rel="prefetch" href="/assets/js/116.058a2437.js"><link rel="prefetch" href="/assets/js/117.e17270a6.js"><link rel="prefetch" href="/assets/js/118.cc7d4332.js"><link rel="prefetch" href="/assets/js/119.33d80c81.js"><link rel="prefetch" href="/assets/js/12.4b70257a.js"><link rel="prefetch" href="/assets/js/120.4136bcc6.js"><link rel="prefetch" href="/assets/js/121.af83b6b7.js"><link rel="prefetch" href="/assets/js/122.fdac225a.js"><link rel="prefetch" href="/assets/js/123.fc6c2d13.js"><link rel="prefetch" href="/assets/js/124.819dfa96.js"><link rel="prefetch" href="/assets/js/125.97c99f90.js"><link rel="prefetch" href="/assets/js/126.1e45da0e.js"><link rel="prefetch" href="/assets/js/127.393a9d4f.js"><link rel="prefetch" href="/assets/js/128.509f58cf.js"><link rel="prefetch" href="/assets/js/129.ed9d72ca.js"><link rel="prefetch" href="/assets/js/13.045c8a67.js"><link rel="prefetch" href="/assets/js/130.0d59d268.js"><link rel="prefetch" href="/assets/js/131.c079c686.js"><link rel="prefetch" href="/assets/js/132.8084a387.js"><link rel="prefetch" href="/assets/js/133.e1bb8511.js"><link rel="prefetch" href="/assets/js/134.dee2e5b7.js"><link rel="prefetch" href="/assets/js/135.27b43e5b.js"><link rel="prefetch" href="/assets/js/136.7265a771.js"><link rel="prefetch" href="/assets/js/137.e02bf420.js"><link rel="prefetch" href="/assets/js/138.5fc03115.js"><link rel="prefetch" href="/assets/js/139.e19f19fe.js"><link rel="prefetch" href="/assets/js/14.64616df0.js"><link rel="prefetch" href="/assets/js/140.4b841561.js"><link rel="prefetch" href="/assets/js/141.8af4bc46.js"><link rel="prefetch" href="/assets/js/142.75dca561.js"><link rel="prefetch" href="/assets/js/143.860a29ab.js"><link rel="prefetch" href="/assets/js/144.9232bb52.js"><link rel="prefetch" href="/assets/js/145.f250b186.js"><link rel="prefetch" href="/assets/js/146.482c7c3c.js"><link rel="prefetch" href="/assets/js/147.eb3d5b95.js"><link rel="prefetch" href="/assets/js/148.b006a63b.js"><link rel="prefetch" href="/assets/js/149.123490f8.js"><link rel="prefetch" href="/assets/js/15.dbbb965d.js"><link rel="prefetch" href="/assets/js/150.fa33e60d.js"><link rel="prefetch" href="/assets/js/151.60dd9d1d.js"><link rel="prefetch" href="/assets/js/152.418c5188.js"><link rel="prefetch" href="/assets/js/153.ad19a757.js"><link rel="prefetch" href="/assets/js/154.e303837e.js"><link rel="prefetch" href="/assets/js/155.36b53298.js"><link rel="prefetch" href="/assets/js/156.1fcc2b06.js"><link rel="prefetch" href="/assets/js/157.c8b11122.js"><link rel="prefetch" href="/assets/js/158.ed254575.js"><link rel="prefetch" href="/assets/js/159.4ebfe922.js"><link rel="prefetch" href="/assets/js/16.f39185fe.js"><link rel="prefetch" href="/assets/js/160.fda14cb4.js"><link rel="prefetch" href="/assets/js/161.2ec0c797.js"><link rel="prefetch" href="/assets/js/162.31647ddf.js"><link rel="prefetch" href="/assets/js/163.6c460d63.js"><link rel="prefetch" href="/assets/js/164.676b024a.js"><link rel="prefetch" href="/assets/js/165.7c11f379.js"><link rel="prefetch" href="/assets/js/166.e455a0d6.js"><link rel="prefetch" href="/assets/js/167.2789bddc.js"><link rel="prefetch" href="/assets/js/168.64787dbc.js"><link rel="prefetch" href="/assets/js/169.0bd9deb0.js"><link rel="prefetch" href="/assets/js/17.98d20099.js"><link rel="prefetch" href="/assets/js/170.414b10d4.js"><link rel="prefetch" href="/assets/js/171.b04c2097.js"><link rel="prefetch" href="/assets/js/172.2c2728a4.js"><link rel="prefetch" href="/assets/js/173.7b3813ef.js"><link rel="prefetch" href="/assets/js/174.e6e9e0c2.js"><link rel="prefetch" href="/assets/js/175.4117bbca.js"><link rel="prefetch" href="/assets/js/176.e3cec383.js"><link rel="prefetch" href="/assets/js/177.1cb7059a.js"><link rel="prefetch" href="/assets/js/178.5e05b9a3.js"><link rel="prefetch" href="/assets/js/179.2731f2c3.js"><link rel="prefetch" href="/assets/js/18.01dc2c1a.js"><link rel="prefetch" href="/assets/js/180.8d42ab94.js"><link rel="prefetch" href="/assets/js/181.730d7657.js"><link rel="prefetch" href="/assets/js/182.23c62aee.js"><link rel="prefetch" href="/assets/js/183.ea978fdc.js"><link rel="prefetch" href="/assets/js/184.62f40035.js"><link rel="prefetch" href="/assets/js/185.2fa278d4.js"><link rel="prefetch" href="/assets/js/186.e1983553.js"><link rel="prefetch" href="/assets/js/187.bd5f8aae.js"><link rel="prefetch" href="/assets/js/188.fde94bc7.js"><link rel="prefetch" href="/assets/js/189.80235505.js"><link rel="prefetch" href="/assets/js/19.32f5cb38.js"><link rel="prefetch" href="/assets/js/190.48851103.js"><link rel="prefetch" href="/assets/js/191.fce0fe30.js"><link rel="prefetch" href="/assets/js/192.268a49ec.js"><link rel="prefetch" href="/assets/js/193.38f39029.js"><link rel="prefetch" href="/assets/js/194.0fa9b75a.js"><link rel="prefetch" href="/assets/js/195.187b3b6f.js"><link rel="prefetch" href="/assets/js/196.e9d07006.js"><link rel="prefetch" href="/assets/js/197.35de15e6.js"><link rel="prefetch" href="/assets/js/198.f90bfa30.js"><link rel="prefetch" href="/assets/js/199.26d62d4b.js"><link rel="prefetch" href="/assets/js/20.b098f0f5.js"><link rel="prefetch" href="/assets/js/200.8687a88a.js"><link rel="prefetch" href="/assets/js/201.fe9116ec.js"><link rel="prefetch" href="/assets/js/202.49a57957.js"><link rel="prefetch" href="/assets/js/203.d505eb7e.js"><link rel="prefetch" href="/assets/js/204.b38bac14.js"><link rel="prefetch" href="/assets/js/205.e63ffcd2.js"><link rel="prefetch" href="/assets/js/206.e36c8ffc.js"><link rel="prefetch" href="/assets/js/207.1026000d.js"><link rel="prefetch" href="/assets/js/208.15f562db.js"><link rel="prefetch" href="/assets/js/209.5757e1d4.js"><link rel="prefetch" href="/assets/js/21.5b501017.js"><link rel="prefetch" href="/assets/js/210.bafb594c.js"><link rel="prefetch" href="/assets/js/211.36d81187.js"><link rel="prefetch" href="/assets/js/212.621c7cff.js"><link rel="prefetch" href="/assets/js/213.ddd65089.js"><link rel="prefetch" href="/assets/js/214.9b2a7c16.js"><link rel="prefetch" href="/assets/js/215.7cbb5cb1.js"><link rel="prefetch" href="/assets/js/216.72090d93.js"><link rel="prefetch" href="/assets/js/217.fa5676c4.js"><link rel="prefetch" href="/assets/js/218.3bfd3358.js"><link rel="prefetch" href="/assets/js/219.4365ec9c.js"><link rel="prefetch" href="/assets/js/22.b7f6fef5.js"><link rel="prefetch" href="/assets/js/220.8618b36c.js"><link rel="prefetch" href="/assets/js/221.1f025987.js"><link rel="prefetch" href="/assets/js/222.dd9493f5.js"><link rel="prefetch" href="/assets/js/223.f488af59.js"><link rel="prefetch" href="/assets/js/224.9c3d963d.js"><link rel="prefetch" href="/assets/js/225.9f1309f1.js"><link rel="prefetch" href="/assets/js/226.06e9112f.js"><link rel="prefetch" href="/assets/js/227.ac375105.js"><link rel="prefetch" href="/assets/js/228.b5de121e.js"><link rel="prefetch" href="/assets/js/229.eacac93e.js"><link rel="prefetch" href="/assets/js/23.5e85a335.js"><link rel="prefetch" href="/assets/js/230.ba26d1ad.js"><link rel="prefetch" href="/assets/js/231.1d4a92f2.js"><link rel="prefetch" href="/assets/js/232.8a053837.js"><link rel="prefetch" href="/assets/js/233.461f3d80.js"><link rel="prefetch" href="/assets/js/234.cc97548a.js"><link rel="prefetch" href="/assets/js/235.d5c8825f.js"><link rel="prefetch" href="/assets/js/236.64f83641.js"><link rel="prefetch" href="/assets/js/237.727baf70.js"><link rel="prefetch" href="/assets/js/238.97194e86.js"><link rel="prefetch" href="/assets/js/239.e2214f9c.js"><link rel="prefetch" href="/assets/js/24.e0e8d4fd.js"><link rel="prefetch" href="/assets/js/240.d556e0f7.js"><link rel="prefetch" href="/assets/js/241.5b24ee77.js"><link rel="prefetch" href="/assets/js/242.e7dea18a.js"><link rel="prefetch" href="/assets/js/243.7afc0027.js"><link rel="prefetch" href="/assets/js/244.aaba03d8.js"><link rel="prefetch" href="/assets/js/245.12c762b6.js"><link rel="prefetch" href="/assets/js/246.665a9f7c.js"><link rel="prefetch" href="/assets/js/247.7c01c9a0.js"><link rel="prefetch" href="/assets/js/248.9691ca51.js"><link rel="prefetch" href="/assets/js/249.54231cf2.js"><link rel="prefetch" href="/assets/js/25.0eac08dd.js"><link rel="prefetch" href="/assets/js/250.c04d5b3e.js"><link rel="prefetch" href="/assets/js/251.e3192e36.js"><link rel="prefetch" href="/assets/js/252.7af848b7.js"><link rel="prefetch" href="/assets/js/253.07764dda.js"><link rel="prefetch" href="/assets/js/254.fb652588.js"><link rel="prefetch" href="/assets/js/255.3a167a84.js"><link rel="prefetch" href="/assets/js/256.4d4484c4.js"><link rel="prefetch" href="/assets/js/257.b8171800.js"><link rel="prefetch" href="/assets/js/258.66de1268.js"><link rel="prefetch" href="/assets/js/259.78d76c0a.js"><link rel="prefetch" href="/assets/js/26.c9867be1.js"><link rel="prefetch" href="/assets/js/260.099b3638.js"><link rel="prefetch" href="/assets/js/261.bb8c6f44.js"><link rel="prefetch" href="/assets/js/262.9cc58c1d.js"><link rel="prefetch" href="/assets/js/263.d8c4f0f1.js"><link rel="prefetch" href="/assets/js/264.0bb5e491.js"><link rel="prefetch" href="/assets/js/265.c28d73bc.js"><link rel="prefetch" href="/assets/js/266.51c31c58.js"><link rel="prefetch" href="/assets/js/267.793aab09.js"><link rel="prefetch" href="/assets/js/268.579cc048.js"><link rel="prefetch" href="/assets/js/269.954199ce.js"><link rel="prefetch" href="/assets/js/27.d41edf86.js"><link rel="prefetch" href="/assets/js/270.afc9ef86.js"><link rel="prefetch" href="/assets/js/271.9e49eaab.js"><link rel="prefetch" href="/assets/js/272.14e37178.js"><link rel="prefetch" href="/assets/js/273.8bdd74b9.js"><link rel="prefetch" href="/assets/js/274.8bb98f41.js"><link rel="prefetch" href="/assets/js/275.fbabaf72.js"><link rel="prefetch" href="/assets/js/276.37b24cad.js"><link rel="prefetch" href="/assets/js/277.4ac7e73c.js"><link rel="prefetch" href="/assets/js/278.d07bf8b4.js"><link rel="prefetch" href="/assets/js/279.96e054cc.js"><link rel="prefetch" href="/assets/js/28.d036ec63.js"><link rel="prefetch" href="/assets/js/280.9fa37cf8.js"><link rel="prefetch" href="/assets/js/281.c81edb40.js"><link rel="prefetch" href="/assets/js/282.c75baace.js"><link rel="prefetch" href="/assets/js/283.a6a1fe28.js"><link rel="prefetch" href="/assets/js/284.b782760d.js"><link rel="prefetch" href="/assets/js/285.335ca82b.js"><link rel="prefetch" href="/assets/js/286.d993326a.js"><link rel="prefetch" href="/assets/js/287.053238aa.js"><link rel="prefetch" href="/assets/js/288.07fa0b59.js"><link rel="prefetch" href="/assets/js/289.6704b174.js"><link rel="prefetch" href="/assets/js/29.069cf689.js"><link rel="prefetch" href="/assets/js/290.d7414dff.js"><link rel="prefetch" href="/assets/js/291.7d6cb2ea.js"><link rel="prefetch" href="/assets/js/292.35ccdf37.js"><link rel="prefetch" href="/assets/js/293.af7157ef.js"><link rel="prefetch" href="/assets/js/294.6bb48ba8.js"><link rel="prefetch" href="/assets/js/295.097b59c4.js"><link rel="prefetch" href="/assets/js/296.4fca5cca.js"><link rel="prefetch" href="/assets/js/297.5bfd0ef9.js"><link rel="prefetch" href="/assets/js/298.52665684.js"><link rel="prefetch" href="/assets/js/299.86b568f3.js"><link rel="prefetch" href="/assets/js/30.d9ae5fd3.js"><link rel="prefetch" href="/assets/js/300.4425ae8c.js"><link rel="prefetch" href="/assets/js/301.7c341f63.js"><link rel="prefetch" href="/assets/js/302.cccc05d8.js"><link rel="prefetch" href="/assets/js/303.e33447dd.js"><link rel="prefetch" href="/assets/js/304.4c739580.js"><link rel="prefetch" href="/assets/js/305.aa067d8b.js"><link rel="prefetch" href="/assets/js/306.eee8d8e1.js"><link rel="prefetch" href="/assets/js/307.520ab5d8.js"><link rel="prefetch" href="/assets/js/308.42f8217f.js"><link rel="prefetch" href="/assets/js/309.571889c2.js"><link rel="prefetch" href="/assets/js/31.d5b2b275.js"><link rel="prefetch" href="/assets/js/310.37c09e50.js"><link rel="prefetch" href="/assets/js/311.06cc4ee5.js"><link rel="prefetch" href="/assets/js/312.dade5716.js"><link rel="prefetch" href="/assets/js/313.a91c4d88.js"><link rel="prefetch" href="/assets/js/314.b29ef147.js"><link rel="prefetch" href="/assets/js/315.651d6b8c.js"><link rel="prefetch" href="/assets/js/316.64f9b0c8.js"><link rel="prefetch" href="/assets/js/317.ae1b5904.js"><link rel="prefetch" href="/assets/js/318.9a2f2492.js"><link rel="prefetch" href="/assets/js/319.fbc58603.js"><link rel="prefetch" href="/assets/js/32.da754300.js"><link rel="prefetch" href="/assets/js/320.e9f2a31b.js"><link rel="prefetch" href="/assets/js/321.e68fbabd.js"><link rel="prefetch" href="/assets/js/322.b72c6d25.js"><link rel="prefetch" href="/assets/js/323.d665fbcc.js"><link rel="prefetch" href="/assets/js/324.5e52bb59.js"><link rel="prefetch" href="/assets/js/325.b245f89e.js"><link rel="prefetch" href="/assets/js/326.4cc5e1c8.js"><link rel="prefetch" href="/assets/js/327.533646ac.js"><link rel="prefetch" href="/assets/js/328.f8fb15c5.js"><link rel="prefetch" href="/assets/js/329.05958bb4.js"><link rel="prefetch" href="/assets/js/33.15359fa6.js"><link rel="prefetch" href="/assets/js/330.18e9e5ba.js"><link rel="prefetch" href="/assets/js/331.b7a7934e.js"><link rel="prefetch" href="/assets/js/332.d02fbc7d.js"><link rel="prefetch" href="/assets/js/333.4d99fd0a.js"><link rel="prefetch" href="/assets/js/334.a945711e.js"><link rel="prefetch" href="/assets/js/335.364e1c87.js"><link rel="prefetch" href="/assets/js/336.75f32bdd.js"><link rel="prefetch" href="/assets/js/337.65b9e202.js"><link rel="prefetch" href="/assets/js/338.4e3e0237.js"><link rel="prefetch" href="/assets/js/339.b3b87712.js"><link rel="prefetch" href="/assets/js/34.d28e52b8.js"><link rel="prefetch" href="/assets/js/340.d9ae10fe.js"><link rel="prefetch" href="/assets/js/341.539b0c9b.js"><link rel="prefetch" href="/assets/js/342.a3989060.js"><link rel="prefetch" href="/assets/js/343.960b7508.js"><link rel="prefetch" href="/assets/js/344.6d8cdfe7.js"><link rel="prefetch" href="/assets/js/345.e7e86142.js"><link rel="prefetch" href="/assets/js/346.a6ed89b5.js"><link rel="prefetch" href="/assets/js/347.e490cb19.js"><link rel="prefetch" href="/assets/js/348.dff0ad35.js"><link rel="prefetch" href="/assets/js/349.4bcc0163.js"><link rel="prefetch" href="/assets/js/35.448cb413.js"><link rel="prefetch" href="/assets/js/350.084e0aa3.js"><link rel="prefetch" href="/assets/js/351.fbf634a8.js"><link rel="prefetch" href="/assets/js/352.44017e86.js"><link rel="prefetch" href="/assets/js/353.1b6e7af9.js"><link rel="prefetch" href="/assets/js/354.e14d3894.js"><link rel="prefetch" href="/assets/js/355.b2a15211.js"><link rel="prefetch" href="/assets/js/356.322f548a.js"><link rel="prefetch" href="/assets/js/357.c844f660.js"><link rel="prefetch" href="/assets/js/358.d969cfe2.js"><link rel="prefetch" href="/assets/js/359.aa6ff474.js"><link rel="prefetch" href="/assets/js/36.2550923b.js"><link rel="prefetch" href="/assets/js/360.97401cea.js"><link rel="prefetch" href="/assets/js/361.04034832.js"><link rel="prefetch" href="/assets/js/362.64fa2dd8.js"><link rel="prefetch" href="/assets/js/363.fca50e3b.js"><link rel="prefetch" href="/assets/js/364.4a2129c5.js"><link rel="prefetch" href="/assets/js/365.143f10fc.js"><link rel="prefetch" href="/assets/js/366.255af148.js"><link rel="prefetch" href="/assets/js/367.aed5a6de.js"><link rel="prefetch" href="/assets/js/368.b1c7f369.js"><link rel="prefetch" href="/assets/js/369.b6761e08.js"><link rel="prefetch" href="/assets/js/37.6741f71b.js"><link rel="prefetch" href="/assets/js/370.c725380c.js"><link rel="prefetch" href="/assets/js/371.ac5ae791.js"><link rel="prefetch" href="/assets/js/372.e7fd06c9.js"><link rel="prefetch" href="/assets/js/373.d059a669.js"><link rel="prefetch" href="/assets/js/374.fdaa8d4a.js"><link rel="prefetch" href="/assets/js/375.797a45dd.js"><link rel="prefetch" href="/assets/js/376.795ff584.js"><link rel="prefetch" href="/assets/js/377.dec17054.js"><link rel="prefetch" href="/assets/js/378.328acce3.js"><link rel="prefetch" href="/assets/js/379.0a988cdc.js"><link rel="prefetch" href="/assets/js/38.872948ca.js"><link rel="prefetch" href="/assets/js/380.a0a7a73b.js"><link rel="prefetch" href="/assets/js/382.63daddd6.js"><link rel="prefetch" href="/assets/js/383.61b6736e.js"><link rel="prefetch" href="/assets/js/384.d0e7b164.js"><link rel="prefetch" href="/assets/js/385.3f458819.js"><link rel="prefetch" href="/assets/js/386.b60a678c.js"><link rel="prefetch" href="/assets/js/387.840c605f.js"><link rel="prefetch" href="/assets/js/388.4b73aac0.js"><link rel="prefetch" href="/assets/js/389.f449e4ea.js"><link rel="prefetch" href="/assets/js/39.9bd02c85.js"><link rel="prefetch" href="/assets/js/390.17e398a8.js"><link rel="prefetch" href="/assets/js/391.5d779558.js"><link rel="prefetch" href="/assets/js/392.eee533f7.js"><link rel="prefetch" href="/assets/js/393.97737dd9.js"><link rel="prefetch" href="/assets/js/394.13aa92f6.js"><link rel="prefetch" href="/assets/js/395.4f45e960.js"><link rel="prefetch" href="/assets/js/396.808e0cd2.js"><link rel="prefetch" href="/assets/js/397.fb7f6d60.js"><link rel="prefetch" href="/assets/js/398.b46bdc7c.js"><link rel="prefetch" href="/assets/js/399.664d6571.js"><link rel="prefetch" href="/assets/js/4.99e5432f.js"><link rel="prefetch" href="/assets/js/40.aba15496.js"><link rel="prefetch" href="/assets/js/400.ee648749.js"><link rel="prefetch" href="/assets/js/401.1d9f4e1d.js"><link rel="prefetch" href="/assets/js/402.2d1d459a.js"><link rel="prefetch" href="/assets/js/403.0461a1a2.js"><link rel="prefetch" href="/assets/js/404.de8afb41.js"><link rel="prefetch" href="/assets/js/405.95989daa.js"><link rel="prefetch" href="/assets/js/406.2668e050.js"><link rel="prefetch" href="/assets/js/407.16c4942b.js"><link rel="prefetch" href="/assets/js/408.51522d4c.js"><link rel="prefetch" href="/assets/js/409.a2313195.js"><link rel="prefetch" href="/assets/js/41.e9874039.js"><link rel="prefetch" href="/assets/js/410.ca2fb3cc.js"><link rel="prefetch" href="/assets/js/411.cdca05e7.js"><link rel="prefetch" href="/assets/js/412.9616da28.js"><link rel="prefetch" href="/assets/js/413.bea54b36.js"><link rel="prefetch" href="/assets/js/414.c1bf84b3.js"><link rel="prefetch" href="/assets/js/415.345fd8d2.js"><link rel="prefetch" href="/assets/js/416.53c3dae7.js"><link rel="prefetch" href="/assets/js/417.e61fc1a4.js"><link rel="prefetch" href="/assets/js/418.7de45153.js"><link rel="prefetch" href="/assets/js/419.ceaaf5bc.js"><link rel="prefetch" href="/assets/js/42.9a545fc9.js"><link rel="prefetch" href="/assets/js/420.203347ef.js"><link rel="prefetch" href="/assets/js/421.c8883568.js"><link rel="prefetch" href="/assets/js/422.76ccb9f0.js"><link rel="prefetch" href="/assets/js/423.9db4679d.js"><link rel="prefetch" href="/assets/js/424.783b9c44.js"><link rel="prefetch" href="/assets/js/425.6a70e6e0.js"><link rel="prefetch" href="/assets/js/426.ec3e85c0.js"><link rel="prefetch" href="/assets/js/427.56a19e65.js"><link rel="prefetch" href="/assets/js/428.0178afc3.js"><link rel="prefetch" href="/assets/js/429.76cfa225.js"><link rel="prefetch" href="/assets/js/43.40991519.js"><link rel="prefetch" href="/assets/js/430.47686810.js"><link rel="prefetch" href="/assets/js/431.5a662523.js"><link rel="prefetch" href="/assets/js/432.5a532c26.js"><link rel="prefetch" href="/assets/js/433.4265c0c8.js"><link rel="prefetch" href="/assets/js/434.38b5a2f2.js"><link rel="prefetch" href="/assets/js/435.87dac4c6.js"><link rel="prefetch" href="/assets/js/436.493a7dab.js"><link rel="prefetch" href="/assets/js/437.e03b1388.js"><link rel="prefetch" href="/assets/js/438.719d3f41.js"><link rel="prefetch" href="/assets/js/439.ee41f52f.js"><link rel="prefetch" href="/assets/js/44.42a59cfd.js"><link rel="prefetch" href="/assets/js/440.29e69e6b.js"><link rel="prefetch" href="/assets/js/441.cae3ced6.js"><link rel="prefetch" href="/assets/js/442.74d38195.js"><link rel="prefetch" href="/assets/js/443.304263cb.js"><link rel="prefetch" href="/assets/js/444.9ce26026.js"><link rel="prefetch" href="/assets/js/445.85c966a7.js"><link rel="prefetch" href="/assets/js/446.f9bb500c.js"><link rel="prefetch" href="/assets/js/447.c442384b.js"><link rel="prefetch" href="/assets/js/448.aeb59378.js"><link rel="prefetch" href="/assets/js/449.1cf773be.js"><link rel="prefetch" href="/assets/js/45.61a4c404.js"><link rel="prefetch" href="/assets/js/450.2b2b3763.js"><link rel="prefetch" href="/assets/js/451.fe1519c3.js"><link rel="prefetch" href="/assets/js/452.48899981.js"><link rel="prefetch" href="/assets/js/453.7ae7e168.js"><link rel="prefetch" href="/assets/js/454.55aa5196.js"><link rel="prefetch" href="/assets/js/455.5e5f9203.js"><link rel="prefetch" href="/assets/js/456.7e355aeb.js"><link rel="prefetch" href="/assets/js/457.1daeb67d.js"><link rel="prefetch" href="/assets/js/458.fab9dd1e.js"><link rel="prefetch" href="/assets/js/459.71f9f5be.js"><link rel="prefetch" href="/assets/js/46.733d682a.js"><link rel="prefetch" href="/assets/js/460.b55ad6c6.js"><link rel="prefetch" href="/assets/js/461.314203cd.js"><link rel="prefetch" href="/assets/js/462.29a59885.js"><link rel="prefetch" href="/assets/js/463.3b643f83.js"><link rel="prefetch" href="/assets/js/464.239479b6.js"><link rel="prefetch" href="/assets/js/465.c238e08f.js"><link rel="prefetch" href="/assets/js/466.a6612120.js"><link rel="prefetch" href="/assets/js/467.833308dd.js"><link rel="prefetch" href="/assets/js/468.6d5fe511.js"><link rel="prefetch" href="/assets/js/469.865ee4db.js"><link rel="prefetch" href="/assets/js/47.dbbe958b.js"><link rel="prefetch" href="/assets/js/470.2a938456.js"><link rel="prefetch" href="/assets/js/471.92367d00.js"><link rel="prefetch" href="/assets/js/472.5f71339d.js"><link rel="prefetch" href="/assets/js/473.5293f816.js"><link rel="prefetch" href="/assets/js/474.479af909.js"><link rel="prefetch" href="/assets/js/475.735dc127.js"><link rel="prefetch" href="/assets/js/476.fcd47b06.js"><link rel="prefetch" href="/assets/js/477.1440bf29.js"><link rel="prefetch" href="/assets/js/478.9ffd59ed.js"><link rel="prefetch" href="/assets/js/479.2084922c.js"><link rel="prefetch" href="/assets/js/48.c713e3be.js"><link rel="prefetch" href="/assets/js/480.89dc22ce.js"><link rel="prefetch" href="/assets/js/481.567e307e.js"><link rel="prefetch" href="/assets/js/482.fc2823de.js"><link rel="prefetch" href="/assets/js/483.b9fbcc3d.js"><link rel="prefetch" href="/assets/js/484.b62bd3a3.js"><link rel="prefetch" href="/assets/js/485.e6e32e45.js"><link rel="prefetch" href="/assets/js/486.ff58b4b3.js"><link rel="prefetch" href="/assets/js/487.21f0f423.js"><link rel="prefetch" href="/assets/js/488.8a8dd70c.js"><link rel="prefetch" href="/assets/js/489.dd637673.js"><link rel="prefetch" href="/assets/js/49.619260a9.js"><link rel="prefetch" href="/assets/js/490.6e883e15.js"><link rel="prefetch" href="/assets/js/491.29e931a1.js"><link rel="prefetch" href="/assets/js/492.47a144dd.js"><link rel="prefetch" href="/assets/js/493.fecc7724.js"><link rel="prefetch" href="/assets/js/494.abdd341d.js"><link rel="prefetch" href="/assets/js/495.c94166e3.js"><link rel="prefetch" href="/assets/js/496.356823c3.js"><link rel="prefetch" href="/assets/js/497.236aa745.js"><link rel="prefetch" href="/assets/js/498.6abf781c.js"><link rel="prefetch" href="/assets/js/499.8e75257d.js"><link rel="prefetch" href="/assets/js/5.2c66b9cb.js"><link rel="prefetch" href="/assets/js/50.9706c3bd.js"><link rel="prefetch" href="/assets/js/500.e7ab6c5f.js"><link rel="prefetch" href="/assets/js/501.f39ed48f.js"><link rel="prefetch" href="/assets/js/502.b87c0be3.js"><link rel="prefetch" href="/assets/js/503.1217f5fd.js"><link rel="prefetch" href="/assets/js/504.6dc417a5.js"><link rel="prefetch" href="/assets/js/505.e7e67852.js"><link rel="prefetch" href="/assets/js/506.e78476c7.js"><link rel="prefetch" href="/assets/js/507.5c6beca4.js"><link rel="prefetch" href="/assets/js/508.5d53c32f.js"><link rel="prefetch" href="/assets/js/509.38049f9a.js"><link rel="prefetch" href="/assets/js/51.a88a8be6.js"><link rel="prefetch" href="/assets/js/510.d53ce4a2.js"><link rel="prefetch" href="/assets/js/511.c904f861.js"><link rel="prefetch" href="/assets/js/512.d74c395c.js"><link rel="prefetch" href="/assets/js/513.fdf09d6f.js"><link rel="prefetch" href="/assets/js/514.71fd2871.js"><link rel="prefetch" href="/assets/js/515.4f1b6959.js"><link rel="prefetch" href="/assets/js/516.d9d227cd.js"><link rel="prefetch" href="/assets/js/517.5db347c6.js"><link rel="prefetch" href="/assets/js/518.de9e7d5e.js"><link rel="prefetch" href="/assets/js/519.3ef0cdde.js"><link rel="prefetch" href="/assets/js/52.daf7f249.js"><link rel="prefetch" href="/assets/js/520.b2fe1484.js"><link rel="prefetch" href="/assets/js/521.42e2bea2.js"><link rel="prefetch" href="/assets/js/522.7cc301f1.js"><link rel="prefetch" href="/assets/js/523.c7da0090.js"><link rel="prefetch" href="/assets/js/524.8f770bb8.js"><link rel="prefetch" href="/assets/js/525.22aa0d44.js"><link rel="prefetch" href="/assets/js/53.6d9f67be.js"><link rel="prefetch" href="/assets/js/54.8403ce3a.js"><link rel="prefetch" href="/assets/js/55.2cd45a63.js"><link rel="prefetch" href="/assets/js/56.063dbe0f.js"><link rel="prefetch" href="/assets/js/57.24c6c793.js"><link rel="prefetch" href="/assets/js/58.ccd2f933.js"><link rel="prefetch" href="/assets/js/59.acdc23b8.js"><link rel="prefetch" href="/assets/js/6.db8c6d5d.js"><link rel="prefetch" href="/assets/js/60.0a016353.js"><link rel="prefetch" href="/assets/js/61.32b5d473.js"><link rel="prefetch" href="/assets/js/62.1d584c66.js"><link rel="prefetch" href="/assets/js/63.7104bfe2.js"><link rel="prefetch" href="/assets/js/64.cd19837f.js"><link rel="prefetch" href="/assets/js/65.28e5bacf.js"><link rel="prefetch" href="/assets/js/66.0557eb73.js"><link rel="prefetch" href="/assets/js/67.5bcade93.js"><link rel="prefetch" href="/assets/js/68.662ebf9b.js"><link rel="prefetch" href="/assets/js/69.87c036f8.js"><link rel="prefetch" href="/assets/js/7.c4a32f95.js"><link rel="prefetch" href="/assets/js/70.8b6ec4d3.js"><link rel="prefetch" href="/assets/js/71.5877c30b.js"><link rel="prefetch" href="/assets/js/72.2da225ed.js"><link rel="prefetch" href="/assets/js/73.c501e2be.js"><link rel="prefetch" href="/assets/js/74.bad05dfa.js"><link rel="prefetch" href="/assets/js/75.7bf1947b.js"><link rel="prefetch" href="/assets/js/76.e3d9c26d.js"><link rel="prefetch" href="/assets/js/77.618b7404.js"><link rel="prefetch" href="/assets/js/78.1784e838.js"><link rel="prefetch" href="/assets/js/79.de112962.js"><link rel="prefetch" href="/assets/js/8.0d7c7c38.js"><link rel="prefetch" href="/assets/js/80.ee29131c.js"><link rel="prefetch" href="/assets/js/81.ff75cbfb.js"><link rel="prefetch" href="/assets/js/82.a1a40237.js"><link rel="prefetch" href="/assets/js/83.254e58ba.js"><link rel="prefetch" href="/assets/js/84.55d56ee0.js"><link rel="prefetch" href="/assets/js/85.c9812f4e.js"><link rel="prefetch" href="/assets/js/86.a602866c.js"><link rel="prefetch" href="/assets/js/87.be5d5f6f.js"><link rel="prefetch" href="/assets/js/88.51040255.js"><link rel="prefetch" href="/assets/js/89.9540f1f4.js"><link rel="prefetch" href="/assets/js/9.c502c264.js"><link rel="prefetch" href="/assets/js/90.98220aae.js"><link rel="prefetch" href="/assets/js/91.d8e05f3c.js"><link rel="prefetch" href="/assets/js/92.9d105cf4.js"><link rel="prefetch" href="/assets/js/93.b96f7169.js"><link rel="prefetch" href="/assets/js/94.b450d42e.js"><link rel="prefetch" href="/assets/js/95.e336cfaa.js"><link rel="prefetch" href="/assets/js/96.fe469522.js"><link rel="prefetch" href="/assets/js/97.5fe20bcf.js"><link rel="prefetch" href="/assets/js/98.30a2af54.js"><link rel="prefetch" href="/assets/js/99.dfd7fd47.js"><link rel="prefetch" href="/assets/js/vendors~docsearch.ac6383e3.js"> |
| <link rel="stylesheet" href="/assets/css/0.styles.679f71b6.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="/zh/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/V0.10.x/Ecosystem Integration/MapReduce TsFile.html" class="nav-link">English</a></li><li class="dropdown-item"><!----> <a href="/zh/UserGuide/V0.10.x/Ecosystem Integration/MapReduce TsFile.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="/zh/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/V0.10.x/Ecosystem Integration/MapReduce TsFile.html" class="nav-link">English</a></li><li class="dropdown-item"><!----> <a href="/zh/UserGuide/V0.10.x/Ecosystem Integration/MapReduce TsFile.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 (v0.10.x)</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"><span>系统工具</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading open"><span>生态集成</span> <span class="arrow down"></span></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/zh/UserGuide/V0.10.x/Ecosystem Integration/Grafana.html" class="sidebar-link">Grafana</a></li><li><a href="/zh/UserGuide/V0.10.x/Ecosystem Integration/MapReduce TsFile.html" class="active sidebar-link">MapReduce TsFile</a></li><li><a href="/zh/UserGuide/V0.10.x/Ecosystem Integration/Spark TsFile.html" class="sidebar-link">Spark TsFile</a></li><li><a href="/zh/UserGuide/V0.10.x/Ecosystem Integration/Spark IoTDB.html" class="sidebar-link">Spark IoTDB</a></li><li><a href="/zh/UserGuide/V0.10.x/Ecosystem Integration/Hive TsFile.html" class="sidebar-link">Hive TsFile</a></li></ul></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="mapreduce-tsfile"><a href="#mapreduce-tsfile" class="header-anchor">#</a> MapReduce TsFile</h1> <h2 id="概要"><a href="#概要" class="header-anchor">#</a> 概要</h2> <ul><li>TsFile的Hadoop连接器使用手册 |
| <ul><li>什么是TsFile的Hadoop连接器</li> <li>系统环境要求</li> <li>数据类型对应关系</li> <li>关于TSFInputFormat的说明</li> <li>使用示例 |
| <ul><li>读示例: 求和</li> <li>写示例: 计算平均数并写入Tsfile中</li></ul></li></ul></li></ul> <h1 id="tsfile的hadoop连接器使用手册"><a href="#tsfile的hadoop连接器使用手册" class="header-anchor">#</a> TsFile的Hadoop连接器使用手册</h1> <h2 id="什么是tsfile的hadoop连接器"><a href="#什么是tsfile的hadoop连接器" class="header-anchor">#</a> 什么是TsFile的Hadoop连接器</h2> <p>TsFile的Hadoop连接器实现了对Hadoop读取外部Tsfile类型的文件格式的支持。让用户可以使用Hadoop的map、reduce等操作对Tsfile文件进行读取、写入和查询。</p> <p>有了这个连接器，用户可以</p> <ul><li>将单个Tsfile文件加载进Hadoop，不论文件是存储在本地文件系统或者是HDFS中</li> <li>将某个特定目录下的所有文件加载进Hadoop，不论文件是存储在本地文件系统或者是HDFS中</li> <li>将Hadoop处理完后的结果以Tsfile的格式保存</li></ul> <h2 id="系统环境要求"><a href="#系统环境要求" class="header-anchor">#</a> 系统环境要求</h2> <table><thead><tr><th>Hadoop 版本</th> <th>Java 版本</th> <th>TsFile 版本</th></tr></thead> <tbody><tr><td><code>2.7.3</code></td> <td><code>1.8</code></td> <td><code>0.10.0</code></td></tr></tbody></table> <blockquote><p>注意：关于如何下载和使用Tsfile, 请参考以下链接: https://github.com/apache/incubator-iotdb/tree/master/tsfile.</p></blockquote> <h2 id="数据类型对应关系"><a href="#数据类型对应关系" class="header-anchor">#</a> 数据类型对应关系</h2> <table><thead><tr><th>TsFile 数据类型</th> <th>Hadoop writable</th></tr></thead> <tbody><tr><td>BOOLEAN</td> <td>BooleanWritable</td></tr> <tr><td>INT32</td> <td>IntWritable</td></tr> <tr><td>INT64</td> <td>LongWritable</td></tr> <tr><td>FLOAT</td> <td>FloatWritable</td></tr> <tr><td>DOUBLE</td> <td>DoubleWritable</td></tr> <tr><td>TEXT</td> <td>Text</td></tr></tbody></table> <h2 id="关于tsfinputformat的说明"><a href="#关于tsfinputformat的说明" class="header-anchor">#</a> 关于TSFInputFormat的说明</h2> <p>TSFInputFormat继承了Hadoop中FileInputFormat类，重写了其中切片的方法。</p> <p>目前的切片方法是根据每个ChunkGroup的中点的offset是否属于Hadoop所切片的startOffset和endOffset之间，来判断是否将该ChunkGroup放入此切片。</p> <p>TSFInputFormat将tsfile中的数据以多个<code>MapWritable</code>记录的形式返回给用户。</p> <p>假设我们想要从Tsfile中获得名为<code>d1</code>的设备的数据，该设备有三个传感器，名称分别为<code>s1</code>, <code>s2</code>, <code>s3</code>。</p> <p><code>s1</code>的类型是<code>BOOLEAN</code>, <code>s2</code>的类型是 <code>DOUBLE</code>, <code>s3</code>的类型是<code>TEXT</code>.</p> <p><code>MapWritable</code>的结构如下所示：</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>{ |
| "time_stamp": 10000000, |
| "device_id": d1, |
| "s1": true, |
| "s2": 3.14, |
| "s3": "middle" |
| } |
| </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></div></div><p>在Hadoop的Map job中，你可以采用如下方法获得你想要的任何值</p> <p><code>mapwritable.get(new Text("s1"))</code></p> <blockquote><p>注意: <code>MapWritable</code>中所有的键值类型都是<code>Text</code>。</p></blockquote> <h2 id="使用示例"><a href="#使用示例" class="header-anchor">#</a> 使用示例</h2> <h3 id="读示例-求和"><a href="#读示例-求和" class="header-anchor">#</a> 读示例: 求和</h3> <p>首先，我们需要在TSFInputFormat中配置我们需要哪些数据</p> <div class="language- line-numbers-mode"><pre class="language-text"><code> // configure reading time enable |
| TSFInputFormat.setReadTime(job, true); |
| // configure reading deviceId enable |
| TSFInputFormat.setReadDeviceId(job, true); |
| // configure reading which deltaObjectIds |
| String[] deviceIds = {"device_1"}; |
| TSFInputFormat.setReadDeviceIds(job, deltaObjectIds); |
| // configure reading which measurementIds |
| String[] measurementIds = {"sensor_1", "sensor_2", "sensor_3"}; |
| TSFInputFormat.setReadMeasurementIds(job, measurementIds); |
| </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></div></div><p>然后，必须指定mapper和reducer输出的键和值类型</p> <div class="language- line-numbers-mode"><pre class="language-text"><code> // set inputformat and outputformat |
| job.setInputFormatClass(TSFInputFormat.class); |
| // set mapper output key and value |
| job.setMapOutputKeyClass(Text.class); |
| job.setMapOutputValueClass(DoubleWritable.class); |
| // set reducer output key and value |
| job.setOutputKeyClass(Text.class); |
| job.setOutputValueClass(DoubleWritable.class); |
| </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></div></div><p>接着，就可以编写包含具体的处理数据逻辑的<code>mapper</code>和<code>reducer</code>类了。</p> <div class="language- line-numbers-mode"><pre class="language-text"><code> public static class TSMapper extends Mapper<NullWritable, MapWritable, Text, DoubleWritable> { |
| |
| @Override |
| protected void map(NullWritable key, MapWritable value, |
| Mapper<NullWritable, MapWritable, Text, DoubleWritable>.Context context) |
| throws IOException, InterruptedException { |
| |
| Text deltaObjectId = (Text) value.get(new Text("device_id")); |
| context.write(deltaObjectId, (DoubleWritable) value.get(new Text("sensor_3"))); |
| } |
| } |
| |
| public static class TSReducer extends Reducer<Text, DoubleWritable, Text, DoubleWritable> { |
| |
| @Override |
| protected void reduce(Text key, Iterable<DoubleWritable> values, |
| Reducer<Text, DoubleWritable, Text, DoubleWritable>.Context context) |
| throws IOException, InterruptedException { |
| |
| double sum = 0; |
| for (DoubleWritable value : values) { |
| sum = sum + value.get(); |
| } |
| context.write(key, new DoubleWritable(sum)); |
| } |
| } |
| </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></div></div><blockquote><p>注意: 完整的代码示例可以在如下链接中找到：https://github.com/apache/incubator-iotdb/blob/master/example/hadoop/src/main/java/org/apache/iotdb/hadoop/tsfile/TSFMRReadExample.java</p></blockquote> <h3 id="写示例-计算平均数并写入tsfile中"><a href="#写示例-计算平均数并写入tsfile中" class="header-anchor">#</a> 写示例: 计算平均数并写入Tsfile中</h3> <p>除了<code>OutputFormatClass</code>，剩下的配置代码跟上面的读示例是一样的</p> <div class="language- line-numbers-mode"><pre class="language-text"><code> job.setOutputFormatClass(TSFOutputFormat.class); |
| // set reducer output key and value |
| job.setOutputKeyClass(NullWritable.class); |
| job.setOutputValueClass(HDFSTSRecord.class); |
| </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></div></div><p>然后，是包含具体的处理数据逻辑的<code>mapper</code>和<code>reducer</code>类。</p> <div class="language- line-numbers-mode"><pre class="language-text"><code> public static class TSMapper extends Mapper<NullWritable, MapWritable, Text, MapWritable> { |
| |
| @Override |
| protected void map(NullWritable key, MapWritable value, |
| Mapper<NullWritable, MapWritable, Text, MapWritable>.Context context) |
| throws IOException, InterruptedException { |
| |
| Text deltaObjectId = (Text) value.get(new Text("device_id")); |
| long timestamp = ((LongWritable)value.get(new Text("timestamp"))).get(); |
| if (timestamp % 100000 == 0) { |
| context.write(deltaObjectId, new MapWritable(value)); |
| } |
| } |
| } |
| |
| /** |
| * This reducer calculate the average value. |
| */ |
| public static class TSReducer extends Reducer<Text, MapWritable, NullWritable, HDFSTSRecord> { |
| |
| @Override |
| protected void reduce(Text key, Iterable<MapWritable> values, |
| Reducer<Text, MapWritable, NullWritable, HDFSTSRecord>.Context context) throws IOException, InterruptedException { |
| long sensor1_value_sum = 0; |
| long sensor2_value_sum = 0; |
| double sensor3_value_sum = 0; |
| long num = 0; |
| for (MapWritable value : values) { |
| num++; |
| sensor1_value_sum += ((LongWritable)value.get(new Text("sensor_1"))).get(); |
| sensor2_value_sum += ((LongWritable)value.get(new Text("sensor_2"))).get(); |
| sensor3_value_sum += ((DoubleWritable)value.get(new Text("sensor_3"))).get(); |
| } |
| HDFSTSRecord tsRecord = new HDFSTSRecord(1L, key.toString()); |
| DataPoint dPoint1 = new LongDataPoint("sensor_1", sensor1_value_sum / num); |
| DataPoint dPoint2 = new LongDataPoint("sensor_2", sensor2_value_sum / num); |
| DataPoint dPoint3 = new DoubleDataPoint("sensor_3", sensor3_value_sum / num); |
| tsRecord.addTuple(dPoint1); |
| tsRecord.addTuple(dPoint2); |
| tsRecord.addTuple(dPoint3); |
| context.write(NullWritable.get(), tsRecord); |
| } |
| } |
| </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></div></div><blockquote><p>注意: 完整的代码示例可以在如下链接中找到：https://github.com/apache/incubator-iotdb/blob/master/example/hadoop/src/main/java/org/apache/iotdb/hadoop/tsfile/TSMRWriteExample.java</p></blockquote></div> <div class="page-nav"><p class="inner"><span class="prev"> |
| ← |
| <a href="/zh/UserGuide/V0.10.x/Ecosystem Integration/Grafana.html" class="prev"> |
| Grafana |
| </a></span> <span class="next"><a href="/zh/UserGuide/V0.10.x/Ecosystem Integration/Spark TsFile.html"> |
| Spark TsFile |
| </a> |
| → |
| </span></p></div> <p style="text-align: center;">Copyright © 2020 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.9d485032.js" defer></script><script src="/assets/js/3.80bccc99.js" defer></script><script src="/assets/js/381.4be43bef.js" defer></script> |
| </body> |
| </html> |
