digitalocean mongodb

A brief introduction: Today happened to write a backup script about MongoDB, share the nextTwo-Frontier: This script applies to single-instance and replica sets, not for Shard clustersThree contents:#!/bin/shUser=password=port=ip= '/sbin/ifconfig eth0 | grep ' inet addr ' | Cut-d:-f2 | awk ' {print '} ' | Cut-d '. '-f ' 3,4 'date1= ' Date +%y%m%d%h 'date2= ' Date +%y%m 'Backupdir1= "/backup/mongodb/$DATE 2/

Tags: MongoDB shard cluster Data synchronizationIn this blog we mainly discuss the management of the blog. As a detailed example has been written in the previous five articles, this is no longer an example.First, monitoringShard Cluster is a complex piece in the whole system, so it should be monitored more.Main commands: Serverstatus and Currentop ()Second, manual partitioningManual partitioning means splitting and migrating the blocks of the online s

records (limit 3, 5)Db.users.find (). Skip (3). Limit (5);Sort sortsWith age ascending ASCDb.users.find (). Sort ({age:1}); With age descending desc db.users.find (). Sort ({Age:-1});Cursorfor (var C = Db.t3.find (); C.hasnext ();) {Printjson (C.next ());}MongoDB also has another way to handle cursors> Db.t3.find (). ForEach (function (u) {printjson (U);});Stored ProceduresThe first thing you need to know about stored procedures is that it's written

Before learning MongoDB, it is better to first understand the JSON data format, MongoDB Bson is an extension of JSON, and JSON, if you understand the JSON, it is easy to learn.And, of course, JSON is easy to get started with.(1): Insert can have two types, single insert document and BULK INSERT documentA. Inserting a document: Example: Db.persons.insert ({"_id": "001", "Name": "Zhangsan", "Age": 23})Descrip

Tags: http io os using SP data on CTI ADMongoDB data dumpTo create a backup database in MongoDB, you should use the Mongodump command. This command dumps all data from the server to the dump directory. There are many options available through which you can limit the amount of data or create a backup of your remote server.Grammar:The basic syntax for the Mongodump command is as follows>mongodumpExampleStart the Mongod server. Assume that the mongod loc

Tags: mongodb regular expression PerlMongoDB in Find query using Perl-compatible regular expressionsPerl Express Description: Http://www.chinaunix.net/old_jh/25/159388.htmlExample:>db.post.find () { "_id" :objectid ("54a530c3ff0df3732bac1681"), "id" :2, "name" : "Joe", "age" :30, "Sex" :1, " School ":" Marry "}{" _id ":objectid (" 54a530c3ff0df3732bac1680 ")," id ":1," name ":" Joe "," Age ":30, "Comments" :[ "Test2", "Test9", "test5" ], "Sex" :1, "

Tags: MongoDB implementation tipsSkill one, using the right typestoring data with the right type is a great boon.Data types affect the way data is queried, the order in which data is stored, and how much space is occupied. numbers: Fields used for numbers are stored numerically. A field that is calculated or sorted by sizeThe database automatically converts a 32-bit floating-point number that overflows (such as an overflow due to a $inc operation) and

Label:Learning Reference Address Http://www.runoob.com/mongodbNosqlThe popular database is Oracle,sqlserver,mysql relational database, relative, and non-relational database, collectively referred to as NoSQL, and MongoDB is one of the NoSQL.Characteristics of relational database:-Highly organized structured data-Structured Query Language (SQL) (SQL)-Data and relationships are stored in separate tables.-Data manipulation language, data definition langu

, "fileSize": 469762048, "nssizemb": +, "datafileversion": { " Major ": 4, " minor ": 5 }, " Extentfreelist ": { " num ": 0, " totalsize ": 0 }, " OK ": 1 　　5:db.serverstatus (): Gets the current state information for the server> Db.serverstatus () { "host": "Localhost.localdomain", "version": "2.6.9", "process": "Mongod", "pid": Numberlong (22871), "uptime": 1558, "Uptimemillis": Numberlong (1558300), "Uptimeestimate": 1428, "localtime": Isodate ("2015-07-01t07:30:33.497z

Tags: mongodb nosqlFirst, Introduction Our last article introduced Db.collection.find () can be implemented based on conditional queries and specifying fields returned using the projection operator omit this parameter to return all fields in the matching document, we present today the query operations for array and inline documents, especially for the $ Elemmatch can also use the second parameter of the Find method to limit the elements in the returne

Tags: des style blog http io os using AR javahttp://blog.csdn.net/stationxp/article/details/26077439Plan:Install a virtual machine, Ubuntu bar, 14.04 trusty Tahr.Installing MongoDBNetwork resources:Http://mirrors.aliyun.com/ubuntu-releases/14.04/ubuntu-14.04-server-amd64.iso.torrent (Public network)Http://mirrors.tuna.tsinghua.edu.cn/ubuntu-releases/14.04/ubuntu-14.04-server-amd64.iso.torrent (Education Network)Http://fastdl.mongodb.org/linux/mongodb-

Label: Mongo DB is a non-relational database (NOSQL) that is currently very popular in the IT industry, and its flexible data storage methods are highly favored by current it practitioners. Mongo DB is a good implementation of object-oriented thinking (Oo idea), in Mongo db each record is a document object. The biggest advantage of Mongo DB is that all data persistence requires no developers to write SQL statements manually, and it is easy to invoke methods to implement CRUD operations. Do

Label:　 First download the MongoDB Windows Installer from the official website, choose 32-bit or 64-bit version according to your system type, and then follow the prompts to install the next step. If the installation directory is not modified, it is installed by default in the C:\Program files\mongodb directory. Find the official tools for MONGODB operations in t

InstallationFirst, the TAR package to install1. Baidu Network disk http://pan.baidu.com/s/1FOH2m2.https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-3.0.6.tgzSecond, the Yum source for installationConfigure the Package management system (yum). ChangeCreate a /etc/yum.repos.d/mongodb-org-3.0.repo file so you can install MongoDB directly with Yum.Change to versi

MongoDB Learning: (a) MongoDB installationMongoDB Introduction: The Direct encyclopedia:MongoDB Installation:1: Download the installation:MongoDB Installation: Https://www.mongodb.com/download-center#communityThe installation files under Windows are direct installation files with the. msi suffix, installed directly after download, and the installation path is optional. "

Installing MongoDB under Windows is very simple. For a 32-bit operating system, install the 32-bit MongoDB, or 64-bit system to install the 64-bit MongoDB.Here, take 64 bits as an example. The specific steps are:First, download the latest MongoDB or newer version, here is theMongodb-win32-x86_64-2008plus-ssl-3.2.0-signed.msiSecond, installation1 Double-click

MongoDB index, mongodb 1. Purpose The index is used to accelerate the query. The database index is similar to the index of a book: if an index is used, you do not need to repeat the entire book. Then, the database can directly search for the index, which improves the search speed by several orders of magnitude. After finding an entry in the index, you can directly jump to the position of the target document

Common commands for MongoDB and Common commands for mongodbCommon commands for MongoDB Databases Show dbs # show database use test # select/create database db. dropDatabase () # Delete the current database db # display the current database db. test_col.insert ({x: 1}) # insert (create set) var_insert = {a: 1, B: 3} db. test_col.insert (var_insert) # insert db as a variable. test_col.drop () # Delete the te

This article describes how to connect to mongodb using python, including data insertion, Data Update, data query, and data deletion. Database configuration class MongoDBConn. py The code is as follows: # Encoding = UTF-8'''Mongo Conn connection class'''Import pymongoClass DBConn:Conn = NoneServers = "mongodb: // localhost: 27017"Def connect (self ):Self. conn = pymongo. Connection (self. servers)Def close

for sharding for any set. Assume that the test database is slidetest. Note: It looks a bit similar to the index definition, especially the unique key. When sharding is performed for an empty set, mongodb creates an index for each shard. You can directly link the parts and run getIndexs () for verification. You can log on to 3000 to view the information. Ii. Write to sharded Cluster Once the sharding of the set is completed, the sharding cluster is