mongodb java tutorial

In this five-minute tutorial, we will teach you how to quickly get started with MongoDB in a Windows environment. This article describes how to connect to the MongoDB server and how to use the MongoDB shell. First, you need to download the 64-bit Windows 64-bit MongoDB progr

Label:Recently learning MongoDB, in order to deepen the memory, write a writing essay, first start and close MongoDB start1. Start a MongoDB service:Mongod--port XXXX--dbpath/xx/xx--logpath mongo.log--forkThere are four parameters in this command:--port xxxx Specifies the port of MongoDB listening, if the XXXX port is

databasesMongoDB InstallationHere, the main explanation is win under Install, about Linux under installation, then add on.Download URL: Official website (https://www.mongodb.org/downloads/#production)The Win32 is used here.The author downloads The old long time only then finishes, estimated is the personal network speed question,After installation, the following directories are found in the installation directoryConfigure path PATH [OPTIONAL]The path path is configured so that you can enter

Tags: http io os ar sp file data on CTIRemove () methodThe Remove () method of MongoDB is used to remove a document from the collection. The Remove () method accepts two parameters. The first one is to delete the criteria, the second is the JUSTONE flag: Deletion criteria: (optional) Delete the standard, depending on the file will be deleted. Justone: (optional) If set to TRUE or 1, then delete only one file. Grammar:The basic syntax

MongoDB official Java driver, save and read, the need is DBObject object, this is an interface, implementation put,get and other methods, similar to map, if we want to directly save ordinary Java objects to MongoDB, It needs to be converted into DBObject object first, or implement DBObject interface directly, it is qui

PHP Simple Operation MongoDB Method (installation and additions and deletions to change), MongoDB additions and deletions This article describes the simple operation of the MongoDB method of PHP. Share to everyone for your reference, as follows: PHP operation MongoDB Words first from the Internet to download

tutorial Series MongoDB tutorial MongoDB tutorial About NoSQL MongoDB Introduction Windows Platform Installation Install MongoDBLinux MongoDBMongoDB-database, object, Set MongoDB conne

collection is empty, MongoDB will create an index when using shardcollection ().3.7 Adding 200,000 data to the user collectionAdd 200,000 data to the user collection to see how the collection is so fragmented for (var i = 0; I Use Sh.status () to view shard conditions ---sharding Status--- sharding version: { "_id": 1, "mincompatibleversion": 5, "CurrentVersion": 6, We can see that the collection of data is divided into a shard named Shardrep

for critical data, it is better to use W:1 J:true. It is important to note that journal is recommended to open anyway, set j:true, just say driver call GetLastError () to wait for journal write to complete before returning. This is not to say that the server-side journal is closed without setting j:true. About GetLastError ()In general, developers write code, do not need to call the Db.getlasterror () function, driver after each write operation, will automatically call the method immediately.