MongoDB

Because MongoDB's document structure is in bjson format (bjson Full name: Binary JSON), bjson itself supports storing binary data, therefore, the binary data of the file can be directly stored in the document structure of MongoDB. However, because

We tested the performance of MongoDB's hundreds of millions of data records and tested the following items: (ALL inserts are performed in a single thread, and all reads are performed in multiple threads) 1) General insert performance (each

At the beginning of September, rmongodb officially released a revised version, which means that the language used for numerical computing can also be integrated with nosql products, however, since no company around me is actually using the

Backup and recovery are important technologies for data storage. This is only a single machine learning record operation.MongoDB supports backup and recovery. The backup format is bson and the backup format is JSON and CSV. A) export bson formatIt

Http://songgz.iteye.com/blog/1139345 The following describes how to install MongoDB on Ubuntu 11.04.1. Add 10gen package to source. List.10gen package contains the latest MongoDB version. Add the following lines at the end of the file

10gen has just released MongoDB hadoop connector Version 1.0, which is a middleware product used to connect MongoDB and hadoop so that MongoDB can easily use hadoop's distributed computing capabilities. The main process of MongoDB hadoop connector

Database table management is a very important part of the database system. The following describes how to write DB2 table management statements for your reference. We hope this will help you learn about DB2 table management. Create a table CREATE

DB2 column-to-row is a common operation. The following describes the steps for column-to-row conversion in DB2. If you are interested in column-to-row conversion in DB2, take a look. The following data is provided: Create table salespartition(Year

We areSQL statementWhen embedding an application, you must precompile the application and associate it with the database by following the two steps below: 1. Create a source file to includeEmbedded SQLStatement program. Format: # SQL {SQL statement }

Tablespaces are used to store tables. Abstract physical storage is composed of one or more containers. That is to say, tablespaces can be distributed on one or more physical devices. Table space of 4 k, 8 k, 16 k, and 32 k page size. To improve

Use Automatic Storage Management Next, let's take an example to see how to use automatic storage management. The specific steps are as follows: 1. Create a database DB2TEST1 that uses automatic storage to modify its database configuration parameters,

Time addition and subtraction: Remember to keep up with the time types such as day and HOUR TIMESTAMP (DEF_TIME) + 1 day) + 18 HOUR   DB2 time functions are one of our most common functions. The following describes some DB2 time functions for your

IF statement format (only used in DB2 processes, triggers, and functions)IF (condition)THEN statement;ELSEIF (condition)THEN statement;ELSEIF (condition)THEN statement;......ELSEStatement;End if; Example:[SQL]BEGIN-- Retrieve the maximum IDSET

When migrating data, you must have encountered an error when importing and exporting foreign key constraints. Foreign key constraints are used to ensure the integrity of the database. The integrity of the English word is integrity, so the command

The information related to the DB2 archive log is saved in the recovery history file. You can run the db2 list history command to view the information. Db2inst1 @ suse-db: ~> Db2 list history archive log all for ggyy List History File for ggyy

The multi-partition management of DB2 is usually a little challenging for everyone. However, in many cases, the management of multi-partition and single-partition is not very different. The following summarizes the common operation management

Install db2 6.3 development edition in linux 9.7. decompress db2 www.2cto.com cd/home tar-xzvf db2exc_971_LNX_x86.tar.gz3. install cd/home/expc /. /db2_install4. add User groupadd db2grp useradd-g db2grp-d/home/db2admin-m db2admin useradd-g db2grp-d/

Db2 import and export table data 1. export the DEL Text File export to D: \ t_testtable2012121_del of del select * from T_TESTTABLE @ www.2cto.com 2. export the ixf text file. the ixf file contains the table structure. The db2 database information

This article introduces how to use $ or and sort () to query performance analysis in MongoDB. If you need it, let's take a look at it. If you don't design thousands of records for your website, the server will be stuck. The Code is as

The db2 tutorial is: DB2 Personal Edition (Linux) installation. DB2 Personal Edition (Linux) InstallationCowboy (zizhao_chen@yahoo.com)The fe of swust2003-10-23Keywords:Db2 linux InstallationAbstract:This article briefly introduces the installation