MongoDB

MongoDB's official drive: https://github.com/mongodb/mongo-csharp-driver/releases Currently the latest version is 2.10, which supports. NET 4.5 or more. Because my current program is still here. NET4.0 built above, so use the 1.10.1 version here.Add

MongoDB has a major feature is replication, there are many forms of replication, where master-slave replication is a more common one.Master-slave replication works: first of all to have two or more servers, one of which is the master node,

First install MongoDB1.:http://www.mongodb.org/downloads2. Unzip to the directory you want to install, such as F:\mongodb3. Create folders F:\mongodb\db, F:\mongodb\log, respectively, to install the DB and log files, create a log file under the log

Installing the MONGODB server1, according to the type of computer system, to the MONGO website to choose the response of the installation package, for:Http://www.mongodb.org/downloadsTake My computer as an example, I downloaded the mongodb-win32-x86_

First, CentOS installation MongoDB Opt directory, download MongoDB, unzip #wget HTTPS://FASTDL.MONGODB.ORG/LINUX/MONGODB-LINUX-X86_64-3.0.6.TG #tar-ZXVF mongodb-linux-x86_64-3.0.6.gz Renaming mongodb-linux-x86_64-3.0.6 to MongoDB #mv mongodb-linux-

Building a high-availability MongoDB cluster (quad): shardinghttp://blog.jobbole.com/72643/Mongodb Replica sets replica set architecture combat (erection, expansion, disaster recovery, repair, client code

Update Homebrew ' s package database.In a system shell, issue the following command:Brew Update2Install MongoDB.You can install the MongoDB via Brew with several different options. Use one of the following operations:Install the MongoDB BinariesTo

Original address: http://www.cnblogs.com/huangxincheng/archive/2012/02/19/2357846.htmlRead the previous article, I believe everyone will know how to open MongoDB, this article on the next one of the additions and deletions to change, first when we

In the previous article, we briefly introduced some basic operations commands, which are now described in more detail for each of these commands: First, data insertionInserting data using the command Insert,insert has only one parameter, which

Learn a little bit every day, progress a little, record a little, share a little, summarize a little.First, the basic application1. Common commandsShow DBS Display Database listUse dbname into the dbname database, case sensitive, no this database

I have described the addition of MongoDB, deletion and modification of the basic operation, here are some of the methods of the query.FindThe most basic is the find and FindOne method. Find returns all the documents in the collection, and if you

There are a lot of blog posts about how to take a single record out of a MongoDB library, including the following three ways:1. Skip a random number of records.dbcursor cursor = coll.find (query), int rint = Random.nextint (Cursor.count ()),

Recently wrote a crawler tool, the data stored in the Web site MongoDB, because the data are duplicated, so I set up the database when the index, the following is my step, the set name is Drugitem,Here is the collection:I want to create a unique

1 . Create a database that is named Foobar Use Foobar this Foobar the database was not actually created. Just in the MONGO cache. !--[if GTE VML 1]>

Deploying Replication SetsA replica set consisting of three nodes provides sufficient redundancy for network failure or other system failures. The replica set also has the ability to have sufficient distributed read operations. The replica set

MongoDB Common CommandsFrom KiinlamInstallationMongoDB official website Download installation (Windows installation method)Basic knowledgeCollections-Tables in the corresponding relational databaseDocuments--correspond to rows in a relational

In MongoDB, the atomicity of the write operation is at the document level, even if the embedded part of the document is modified, the level of the write lock is also document on. When a write operation is to modify multiple documents, the

understanding of distributed clustersThere are many explanations for the concept of distributed clusters, and I prefer "distributed clustering" to two concepts, that is, distributed is a concept, and clustering is another concept.Distributed is a

Impdp gets stuck, DW waits for librarycachelockMy colleagues reported that impdp was stuck in the SCHEMA_REPORT/TYPE/TYPE_SPEC step and did not respond after more than one hour,Check the v $ session:Select program, sid, event, blocking_session from

[Sorting] Summary of common MongoDB commands Summary of common MongoDB commands   Simple addition, deletion, modification, and query dataSpecify whether to display or not to display a field in the query result. For example, we want to search