mongo cam

Label:1) Connect MONGO with MongoDB varMONGO = require (' MongoDB '),//Introducing MongoDB Dbhost= ' 127.0.0.1 ', Dbport= 27017;//Configure basic informationvarDb =MONGO. Db; varConnection =MONGO. Connection; varServer =MONGO. Server; vardb =NewDb (' Local ',NewServer (Dbhost, Dbport), {safe:true}); Initializes the da

After successfully running MONGO, the command line mode is entered, and the test database is selected by default MONGO1. Use the DB command to print out the currently selected database:> DBTest　　2. Use the show DBS command to print out a list of databases> Show DBSLocal 0.078GB3. Using use [dbname] to switch the database> Use LocalSwitched to DB LocalTry using the DB command to print a confirmation that is not in the local database:> DBLocalEven if us

MONGO Shell startup configuration file. Mongorc.js (ii)If you have a. mongorc.js file under your home directory, he will run automatically when you start the shell. Use it to initialize any helper methods you use frequently and delete methods that you do not want to accidentally manipulate.For example, you do not want to use the default Dropdatabase () method, and you can add the following command to the. mongorc.js file:DB.prototype.dropDatabase = fu

Data: Database article number more than 200W, every day around 3K increase.Status: Lucene 2.9 + Pangu participle, read and write separation. The index file reaches more than 1G, and the list reads more and more slowly.Requirements: Front page Implementation list seconds out, retrieve seconds out, enhance the user experience.---------------------------------------------------------------------------------Skipped Ms-sql partition, sub-Library, full-text index ... On MongoDB------------------------

This article mainly introduced about the MONGO index of some of the notes, has a certain reference value, now share to everyone, the need for friends can refer to Index usage Scenarios Excellent: Faster query speed Inferior: Add and delete will incur additional overhead, occupy space Tips: Returns more than half of the data in a collection, with high efficiency for full table scans Index base Basic operations View index: Db.test.getIndexes () CREATE

replace; alter database $ dbname set online" Incremental recovery: osql-U $ user-P "$ password"-d master-S $ instance-Q "alter database $ dbname set offline with rollback immediate; restore database $ dbname from disk = '$ filename' with replace, NORECOVERY; restore database $ dbname from dist =' $ diff_filename 'with recovery; alter database $ dbname set online" III. oracle: Oracle uses rman for backup and recovery. if you are interested, you can learn more about the specific use of rman. IV.

Use admin #进入数据库admin Db.adduser (' name ', ' pwd ') #增加或修改用户密码 Db.system.users.find () #查看用户列表 Db.auth (' name ', ' pwd ') #用户认证 Db.removeuser (' name ') #删除用户 Show Users #查看所有用户 Show DBS #查看所有数据库 Show Collections #查看所有的collection Db.printcollectionstats () #查看各collection的状态 Db.printreplicationinfo () #查看主从复制状态 Db.repairdatabase () #修复数据库 Db.setprofilinglevel (1) #设置记录profiling, 0=off 1=slow 2=all Show Profile #查看profiling Db.copydatabase (' mail_addr ', ' mail_addr_tm

/** * @param $uid * @param $app _id * @param $start _time * @param $end _time * @param $start _page * @param paged Query $limit _page * MongoDB*/ Public Static functionGetuserrevenueinfolist ($uid,$source,$app _id,$start _time,$end _time,$skip,$limit){ $match= [' app_id ' + =$app _id, ' uid ' = = (int)$uid, ' msg_id ' =>1009, ' source ' =intval($source), "timestamp" = [' $gte ' + = (int)$start _time, ' $lt ' + = (int)$end _time], ]; $conditions=Array( Array(' $match

.③: Finally to see whether the open success, the information learned that MongoDB uses 27017 port, then we will type "http://localhost:27017/" in the browser,After opening, MongoDB tells us that on 27017 add 1000 can view MongoDB's management information in HTTP mode.Three: basic operationBecause it is the beginning, about the basic "additions and deletions to change", we open a cmd, enter the MONGO command to open the shell, in fact, this shell is th

": 5}});Bulk.find ({"Id_factory": 2, "Id_alarm_type": 2, "Id_event_type": One, "Ack_statue": {"$nin": [1]}}). Update ({$set: {"Ack _statue ": 1," Ack_time ": 211020472," Id_ack_user ": 5}});Bulk.find ({"Id_factory": 2, "Id_alarm_type": 2, "Id_event_type": "Ack_statue": {"$nin": [1]}}). Update ({$set: {"Ack _statue ": 1," Ack_time ": 211020472," Id_ack_user ": 5}});Bulk.find ({"Id_factory": 2, "Id_alarm_type": 2, "Id_event_type": "Ack_statue": {"$nin": [1]}}). Update ({$set: {"Ack _statue ": 1,"

Reference Documentation: http://bbs.csdn.net/topics/390906498 2-Insufficient hard disk space to free the deleted MongoDB collectionhttps://segmentfault.com/q/10100000024145763-MONGO operation after culling large tableHttp://www.myexception.cn/open-source/1441621.html4-MongoDB Copy Database Copydatabase (). Implement methods to free up disk space. Http://www.111cn.net/database/MongoDB/56304.htmMONGO free disk space after deleting a table or lib

.next ();}var page2=db. Log.find ({"Createtime": {"$GT": Createtime.createtime});Page2.sort ({"Createtime": -1}). Limit (100);So in C # I think it should probably be this way, of course, this is only a demonstration, it must not be in this function to query the results of the last time, or again query, directly to the last query results pass over the good ' Public StaticListintPageSizeintpagenum) {Mongodatabase db=mongohelperfactory.getdatabase (); Mongocollection Collection= db. Getcollectio

MySQL and Mongo dB syntax comparison This article describes how to write common SQL statements in MySQL in MongoDB. If you are eager to use MySQL for a long time, this simple Article It can help you enter the role more quickly.Query:MySQL:Select * from userMongo:DB. User. Find ()MySQL:Select * from user where name = 'starlil'Mongo:DB. User. Find ({'name': 'starlil '})Insert:MySQL:Insert inot user ('name', 'age') values ('starlil', 25)Mongo:DB. User. i

Wampserevr installs redis and mongo extensions, and wampserevrredis 1. Download the extension. dll files (php_redis.dll), php_igbinary.pdb files, and php_assist.dll files (corresponding versions) for redis. 2. Put the desired version in D: \ program \ wamp \ bin \ php \ php5.5.12 \ ext. 3. Open php. ini 4. Enter the extension in php. ini, and php_igbinary.dll is in front of php_redis.dll. 5. Click wampserevr to open the corresponding extension in

= Org.springframework.data.mapping.model.BasicPersistentEntityWritepropertyinternal enters a write that is not a simple property.Then call Writeinternal to write the property, it can be seen that the non-simple property as an object to write the loop.When writing the ID, call:Org.springframework.data.mongodb.core.convert.QueryMapper.convertId method/*** Converts the given raw ID value into either {@linkObjectId} or {@linkString}. * * @paramID *@return */ PublicObject Convertid (obj

1. Query.fields (). Include ("IDFA"). Include ("IMEI"). Include ("id"). include ("OS"). These fields are included in the return data2.①listCriterias.add (Criteria.where ("Time"). GT ("2017-09-20 10:02:26"));Criterias.add (Criteria.where ("time"). Lt ("2017-09-27 10:02:26"));Criterias.add (Criteria.where ("IMEI"). Is ("9686854123"));Query.addcriteria (New Criteria () Andoperator (Criterias.toarray (new criteria[0]));IiToArray explanationPublic if (a.length a = (t[]) Java.lang.reflect.Array. Newin

Tags: LSP mongodb blog modified long integer using str gesThe MongoDB data types are as follows: Type corresponding numbers Alias Description Double1 1 Double String 2 String Object 3 Object Array 4 Array Binary data 5 Bindata Undefined 6 Undefined Deprecated ObjectId 7

We are always in contrast to see their strengths and weaknesses, for MongoDB is also the same, comparative learning let us as soon as possible to grasp the basic knowledge about MongoDB. MongoDB vs. mysql command A relational database is generally composed of three levels of databases (database), tables (table), records (record). Non-relational database MongoDB are composed of three levels of databases (database), Collections (collection), document objects (documents). MongoDB for tables in re

) {mongoclient client=null; try {mongoclientoptions.builder build = new Mongoclientoptions.builder (); With data maximum connection number build.connectionsperhost (50); If all of the current connection are in use, then each CONNECtion can have 50 threads queued for Build.threadsallowedtoblockforconnectionmultiplier (50); Build.connecttimeout (1 * 60 * 1000); Build.maxwaittime (2 * 60 * 1000); Mongoclientoptions options = Build.build (); InetAddress inetaddress; inetaddress =

Turn from: http://hi.baidu.com/zwfec/item/3cfecfabafda3a258819d38b Today, look at the server, found that Mongod start not up, prompted Sun June 2 12:27:02 error:couldn ' t connect to server 127.0.0.1:27017 src/mongo/shell/mongo.js:91 Error Look up the solution on the Internet, most people say set up dbpath, this is to solve the problem, but not to find the root cause of the problem, The root of the problem is that the machine illegal shutdown caus