mongodb terminal commands

outDb.killop (Opid)Create a Collection1, create a collection that is 100 000 bytesDb.createcollection ("mycollection", {capped:true,size:100000})2, create a collection with a size of 100000 bytes and a maximum document count of 100Db.createcollection ("mycollection", {capped:true,size:100000max:100})Force buffer data to be flushed to diskDb.runcommand ({"Fsync": 1, "Lock": 1})Online Backup and Recoverymongodump-d Database-o Backupdirmongorestore-d Database--drop BackupdirMONGO MasterMasterMongo

}, "OK":1}>db.posts.stats () {"OK":0,"errmsg":"Collection [nutch.posts] not found." }> Delete the currently used database: >db.dropdatabase (); View the database currently in use: >db.getname (); >db; The DB and GetName methods are the same effect and can query the currently used database Current DB version: Db.version (); Error message before query: Db.getpreverror (); Clear Error Logging: Db.reseterror (); User-related1. Add a userDb.addus

space size db.userInfo.dataSize ();4. Get the DB Db.userInfo.getDB () where the current aggregation set resides;5, get the current gathering state db.userInfo.stats ();6, get the aggregate aggregate size db.userInfo.totalSize ();7, aggregate storage space size db.userInfo.storageSize ();8. Shard Version Information Db.userInfo.getShardVersion ()9, Aggregation set rename Db.userInfo.renameCollection ("Users"); Rename UserInfo to users10. Delete the current aggregation set Db.userInfo.drop ();[SQ

collection 1, create a clustered collection (table) db.createcollection ("Collname", {size:20, capped:5, Max: 100}); 2, the Aggregation set (table) db.getcollection ("account") that gets the specified name, 3, gets all the aggregation sets of the current DB db.getcollectionnames (); 4, Displays the status of all clustered indexes in the current DB db.printcollectionstats (); user-related 1, adding a user db.adduser ("name"); Db.adduser ("UserName", "pwd123", true); Add users, set passwords, rea

The following format is MongoDB command | MySQL command, the latter as a referenceView DatabaseShow DBS | show databases;View Current Databasedb | Select Database ();Create a databaseUse Test1 | Create DATABASE Test1Note that it is not possible to show DBS in this time. An empty database needs to add at least one file Db.movie.insert ({"Test": "Test"})Switch databaseUse Test1 | Use Test1Deleting a databaseEnter Database Db.dropdatabase | Drop Database

Tags: color cat port Store field conf Information Tor DMI Query based on the length of a field (title) in the collectionDb.collections. Find true " This.title.length " })// Note that kanji is not a character Refresh the config information for the MONGOs cacheDb.admincommand ({"flushrouterconfig":1})// Refresh the cache after modifying configuration in config Using pipelines to import a database from one instance node to another instance20001 passwd 20002 passwd -D dstdbname--archive S

program2. Database-related commands:Db.test.find ({id:10}) returns the DataSet Db.test.find ({id:10}) of the test dataset id=10. Count () returns the total number of data id=10 for the test dataset Db.test.find ({id:10}). l Imit (2) returns the dataset of the test dataset id=10 from the second data set Db.test.find ({id:10}). Skip (8) returns the DataSet id=10 the test dataset Db.test.find from 0 to eighth ({ID :). Limit (2). Skip (8) Returns the data set for the test dataset id=1= from the sec