mongodb data visualization

Linux under the mongodb installation and data import and export tutorial# View linux release numberCat/etc/issue# View linux kernel versionUname-rI,Linux under The general steps of MongoDB installation1. Download the installation package for your system to the website of MongoDB (https://www.mongodb.org/downloads) C

Let's take a look at the testing machine performance (64bit ): ^_^[root@:~]#grep "model name" /proc/cpuinfo | cut -f2 -d: Intel(R) Xeon(R) CPU E5606 @ 2.13GHz Intel(R) Xeon(R) CPU E5606 @ 2.13GHz Intel(R) Xeon(R) CPU E5606 @ 2.13GHz Intel(R) Xeon(R) CPU E5606 @ 2.13GHz Intel(R) Xeon(R) CPU E5606 @ 2.13GHz Intel(R) Xeon(R) CPU E5606 @ 2.13GHz Intel(R) Xeon(R) CPU E5606 @ 2.13GHz Intel(R) Xeon(R) CPU E5606 @ 2.

Tags: data center database MongoDB Master-slave backupData center in the operation of a variety of hardware, power, network failures and other problems, need to design a good system to isolate, minimize the impact on the upper application, continue to provide services; if business interruption occurs, it should be resumed as soon as possible. With master-slave backup design, when the main application system

On a talk about MongoDB installation and management, which involves a number of concepts, data structure and some API calls, do not know it's okay, actually very simple, this will be a brief introduction.1. DocumentationThe document is the core concept of MongoDB, and multiple key-value pairs are placed together as a document, and the document is the most basic

River can be synchronized with a variety of data sources, Wikipedia, MongoDB, CouchDB, RABBITMQ, RSS, Sofa, JDBC, Filesystem,dropbox, etc., and the company's business is to use MongoDB, Today, the test environment virtual machine configured Elasticsearch and MongoDB synchronization, make a general process record, mainl

The data in MongoDB is very flexible, and the collection does not require a uniform structure for documents. However, seriously considering the data model is still very important, because it will affect the application The data in MongoDB is very flexible, and the collection

( Is_numeric ($v 4)) {$v 4 = floatval ($v 4); $product [$k 1][$k 2][$k 3][$k 4] = $v 4;}} if (Is_time ($v 4)) {$product [$k 1][$k 2][$k 3][$k 4] = new \mongodate (Strtotime ($v 4));}} Else{foreach ($v 4 as $k 5=> $v 5) {if (!is_array ($v 5) !is_object ($v 5)) {if (In_array ($k 5, $productfloat)) {if ( Is_numeric ($v 5)) {$v 5 = floatval ($v 5); $product [$k 1][$k 2][$k 3][$k 4][$k 5] = $v 5;}} if (Is_time ($v 5)) {$product [$k 1][$k 2][$k 3][$k 4][$k 5] = new \mongodate (Strtotime ($v 5));}} El

MongoDB Data Link Modeling The data in MongoDB is very flexible, and the collection does not require a uniform structure for documents. However, seriously considering the data model is still very important, because it will affect application performance and database capabili

": +, "Videocdnstatus": Ten, "Checksumstatus": 10, " Mmsstatus ": 1}Encodecursor=db.video_encode.find (query)Historycursor=db.video_encode_history.find (query)Taskiterator (Encodecursor)Taskiterator (Historycursor) def taskiterator (cusor):For encode in Cusor:Mid=encode["Mid"]encodeid=encode["Encodeid"]vtype=encode["VType"]dsturl=encode["Dsturl"]checksumpath=encode["Checksumptah"]F.write (Str (mid) + "," +str (Encodeid) + "," +vtype+ "," +dsturl+ "," +checksumpath+ "\ n")Print "Start run to expo

1. Course OutlineThis course introduces the knowledge of MONGODB data model, including the basic concepts of documents, collections and databases, usage methods and naming rules, the introduction of MONGODB basic data types and the introduction and use of MongoDB shell.

1. Course OutlineThis course focuses on MONGODB data model-related knowledge. Contains basic concepts, usage, and naming conventions for documents, collections, and databases, the main data types of MongoDB, and the introduction and use of MongoDB shell. Document and C

space utilization efficiency. Releasing MongoDB space is troublesome (you need to drop the entire database or repair). TokuMX drop collect or index can release the space. Better memory management. MongoDB nmap is simple, but it is not convenient to allocate fixed memory. Both caching and I/O are scheduled by the operating system. After a long time, large data v

.mongoDBhttp://api.mongodb.org/js/Database and collection naming conventions Should all lowercase Maximum of 64 bytes The database name cannot have the same name as the existing system reserved library, such as admin,local, and config Such collection names are also legal, but individuals do not recommend the use ofDb-text, but not through DB. [DocumentName] got, to be changed to Db.getcollection (DocumentName)Because the db-text will be treated as a subtraction operation.Mo

it by the date field of another index (the index is created in reverse order, and the sorting is also in reverse order ), and the performance of 10 records is returned after the skip100 records. The impact of skip and order on the performance is measured. 7) query the performance of 100 records (that is, KB) (no sorting and no conditions). This test is to test the performance impact of query results of large data volumes. 8) count the total disk

, and the sorting is also in reverse order ), and the performance of 10 records is returned after the skip100 records. The impact of skip and order on the performance is measured. 7) query the performance of 100 records (that is, KB) (no sorting and no conditions). This test is to test the performance impact of query results of large data volumes. 8) count the total disk usage, index disk usage, and data