cloud9 mongodb

Recently began to learn the MongoDB database, but in the blog Park can not find a comparative system of tutorials, a lot of information to go to the English site, the efficiency is relatively low. I am not, by the opportunity to self-study experience are recorded, to facilitate the interest of children's shoes sharing discussion First, the preface Recently began to learn the MongoDB database, but in the b

MongoDB IntroductionMongoDB is a product between relational database and non relational database, and is the most powerful and relational database in the relational database. The data structure he supports is very loose and is a JSON-like Bjson format, so you can store more complex data types. The biggest feature of MongoDB is that the query language he supports is very powerful, and its syntax is somewhat

MongoDB Collections (collection) can be viewed as tables of relational databases, and document objects (documents) can be viewed as a record of relational databases. But the two are not exactly equal. The structure of the table is fixed, the MongoDB set does not have this constraint, and the document object that is stored in the collection can even embed the subdocument, or "child collections". They can eve

Environmental information Operating system: Ubuntu 16.04.2 64-bit installation steps Download the corresponding installation packageCD ~/downloadswget https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-ubuntu1604-3.4.4.tgzUnzip to the specified directorysudo tar-xzvf mongodb-linux-x86_64-ubuntu1604-3.4.4.tgz-c/usr/local/ sudo mv/usr/local/mongodb-linux-x86 _

Tags: MongoDB collection frameworkPrefaceThere are 3 days to end in 2014, and this month's plan has been completed in addition to the summary of MongoDB's other plans. Recently, lazy research on MongoDB has been suspended for a long time. In the last three days, the study of MongoDB is done to summarize and comb;First, the basic conceptfor the aggregation framewo

determine which documents to update. Thesefiltersuse the same syntax as read operations: aquery filter Documentcan specif Y equality condition with expressions To select all documents that contain THENBSP; with the specified : { aquery filter Documentcan use thequery operatorsto specify conditions in the following form: pre>{ An update document to specify the modification to perform or a replacement document that wholly replaces the matching docu ments except

mongodb-sharding Deployment ScenariosFirst, Deployment Environment Five hosts: amongoshard01:10.212.74.43 amongoshard02:10.212.84.4 amongoshard03:10.212.98.23 amongoshard04:10.212.46.5 amongoshard05:10.212.70.21 Installation CentOS 6.5 System Mongodb-linux-x86_64-rhel62-3.0.2.tgz Second, Deployment ScenariosThe goal of the sch

When I first read the Mongodb getting started manual, I saw mapreduce. It was so difficult that I ignored it directly. Now, when I see this part of knowledge again, I am determined to learn it. 1. concept description: MongoDB's MapReduce is equivalent to "groupby" in Mysql. It is easy to use mapreduce to execute parallel data statistics on mongodb. When I first read the

[MongoDB] MongoDB and php,mongodbphp Installing MongoDB PHP extensions on Windows Download Address https://s3.amazonaws.com/drivers.mongodb.org/php/index.html Find the corresponding PHP version of the DLL file, download Php_mongo.dll, put in the PHP installation directory in the EXT directory, modify the php.ini, add a extension=php_mongo.dll, did not find suppo

Mongodb Study Notes 01 and mongodb Study NotesMongodb Overview Mongodb is a document-type NoSQL database that stores bson-> json binary. The internal execution engine is a js interpreter that stores documents into a bson structure and converts them to js objects during query. And can be operated through js syntax.Comparison between

Mongodb distributed cluster (3. sharding), mongodb ClusterOverview The above two blogs are about the mongodb cluster configuration and do not involve the distributed architecture. This blog is about the distributed architecture of mongodb, which divides a whole into multiple parts, each slice is deployed on different s

[MongoDB] The Regex Expression query of MongoDB, mongodbregex In the past two blogs, the topic mainly focus on the high query operation of mongodb. in this blog, we simply study the regex expression in the mongdb. mongoDB also support the regex query. for example The expression is also able to combination with other e

Principles of MongoDB replica set (I) and principles of mongodb Replication References Official Website: www.mongodb.org Chinese community: www.mongoing.com Online Tutorial: https://university.mongodb.com/ Mongodb supports the traditional master-slave architecture. There is no automatic failover function. You must specify the master and slave. We recommend that y

MongoDB official Java driver, save and read, the need is DBObject object, this is an interface, implement Put,get and other methods, similar to map, if we want to directly save ordinary Java objects to MongoDB, You need to convert to dbobject objects, or directly implement the DBObject interface, which is very complex to operate. Fortunately, the Monodb drive with the ability to convert JSON into DBObject o

"MongoDB Entry" Reading notes download:Index view index of http://download.csdn.net/detail/ch717828/9833847 MongoDBDb.test_table.getIndexes () create INDEX (1 for ascending, 1 for descending)Db.test_table.ensureIndex ({x:1}) Types of indexes _ID Index _id indexes are indexes that are established by default for most collections, and a unique _id field is automatically generated for each inserted data MongoDB

Dockerfile #base images from ubuntu:latest maintainer yao.3.li@uconn.edu #install mongodb RUN apt-get Update RUN apt-get-y Install Curl Run Curl-o https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-3.0.6.tgz run TAR-ZXVF mongodb-linux-x86_ 64-3.0.6.tgz run MV mongodb-linux-x86_64-3.0.6//usr/local/

Label:Download driver There are two ways to download a driver: One is to install through NuGet in a C # project, and the other is via the following link: https://github.com/mongodb/mongo-csharp-driver/releases Download the MSI directly for installation or ZIP compression package. Either way, the main goal is to get two DLL files: MongoDB.Bson.dll, MongoDB.Driver.dll. This is the two class library file that you need to reference in your program. . NET

Tags: style blog http color io using strong SP dataAfter the installation of Mongodb , no matter what else, first cool, and then a little bit of detail behind the said.(1) : Open service : C:\mongodb\bin>mongod--dbpath=c:\mongodb\data(2): Open client:C:\mongodb\bin>mongo 127.0.0.1:27017(3): View all databases:Show DBS(

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

Tags: http io os ar using Java for strong SPMongoDB is a high-performance, open-source, modeless document-based database that is a popular one in the current NoSQL database. It can be used in many scenarios to replace the traditional relational database or key/value storage methods. MONGO is developed using C + +. Take the window platform as an example. Http://www.mongodb.org/downloadsInstallation: First step: Download the installation package: If it is a win system, note whether it is