由于Ubuntu 10.04 已经带了MongoDB 1.2.2的源,因此可以直接使用apt-get安装:sudo apt-get install mongodb在安装MongoDB的时候
MongoDB是一个可扩展、高性能的下一代数据库。MongoDB中的数据以文档形式存储,这样就能在单个数据对象中表示复杂的关系。文档可能由 以下几 部分组成:独立的基本类型属性、“内嵌文档”或文档数组。
这样的灵活性让开发者能以一种易于管理且灵活的方式来对大量的问题进行建模,不必将数据打散到不同的数据表中。在数据不宜被构造成单独文档的情况 下,MongoDB有“DBRef”的概念,这是从文档的一个属性指向另一个文档的指针。
从MongoDB数据库中获取和查询数据是十分灵活的——可以基于主文档、文档中的任意属性、任意内嵌文档、数组中的任意文档来动态地查询文档。可 以通过 “点”符号来访问内嵌文档。
由于Ubuntu 10.04 已经带了MongoDB 1.2.2的源,因此可以直接使用apt-get安装:
sudo apt-get install mongodb
在安装MongoDB的时候,系统会安装MongoDB的很多依赖包,安装完成之后,运行MongoDB,会提示:
mongod: error while loading shared libraries: libmozjs.so: cannot open shared object file: No such file or directory
解决方法是:
sudo apt-get install xulrunner-dev
找到libmozjs.so文件:
find /usr/lib | grep libmozjs
可以看到:
/usr/lib/xulrunner-devel-1.9.2.8/sdk/lib/libmozjs.so
/usr/lib/xulrunner-1.9.2.8/libmozjs.so
/usr/lib/firefox-3.6.8/libmozjs.so
给库做个链接:
sudo ln -s /usr/lib/xulrunner-1.9.2.8/libmozjs.so /usr/lib
重启mongodb的服务:
sudo service mongodb start
可以确认一下服务是否启动:
ps aux | grep mongod
pymongo安装
由于pymongo采用的是easy_install的模式进行安装的,,所以需要先安装setuptools:
sudo apt-get install python-setuptools
安装好之后,可以执行安装:
sudo easy_install pymongo
相关阅读:Ubuntu 10.04 安装 MongoDB 注意事项

MySQLoffersvariousstorageengines,eachsuitedfordifferentusecases:1)InnoDBisidealforapplicationsneedingACIDcomplianceandhighconcurrency,supportingtransactionsandforeignkeys.2)MyISAMisbestforread-heavyworkloads,lackingtransactionsupport.3)Memoryengineis

Common security vulnerabilities in MySQL include SQL injection, weak passwords, improper permission configuration, and unupdated software. 1. SQL injection can be prevented by using preprocessing statements. 2. Weak passwords can be avoided by forcibly using strong password strategies. 3. Improper permission configuration can be resolved through regular review and adjustment of user permissions. 4. Unupdated software can be patched by regularly checking and updating the MySQL version.

Identifying slow queries in MySQL can be achieved by enabling slow query logs and setting thresholds. 1. Enable slow query logs and set thresholds. 2. View and analyze slow query log files, and use tools such as mysqldumpslow or pt-query-digest for in-depth analysis. 3. Optimizing slow queries can be achieved through index optimization, query rewriting and avoiding the use of SELECT*.

To monitor the health and performance of MySQL servers, you should pay attention to system health, performance metrics and query execution. 1) Monitor system health: Use top, htop or SHOWGLOBALSTATUS commands to view CPU, memory, disk I/O and network activities. 2) Track performance indicators: monitor key indicators such as query number per second, average query time and cache hit rate. 3) Ensure query execution optimization: Enable slow query logs, record and optimize queries whose execution time exceeds the set threshold.

The main difference between MySQL and MariaDB is performance, functionality and license: 1. MySQL is developed by Oracle, and MariaDB is its fork. 2. MariaDB may perform better in high load environments. 3.MariaDB provides more storage engines and functions. 4.MySQL adopts a dual license, and MariaDB is completely open source. The existing infrastructure, performance requirements, functional requirements and license costs should be taken into account when choosing.

MySQL uses a GPL license. 1) The GPL license allows the free use, modification and distribution of MySQL, but the modified distribution must comply with GPL. 2) Commercial licenses can avoid public modifications and are suitable for commercial applications that require confidentiality.

The situations when choosing InnoDB instead of MyISAM include: 1) transaction support, 2) high concurrency environment, 3) high data consistency; conversely, the situation when choosing MyISAM includes: 1) mainly read operations, 2) no transaction support is required. InnoDB is suitable for applications that require high data consistency and transaction processing, such as e-commerce platforms, while MyISAM is suitable for read-intensive and transaction-free applications such as blog systems.

In MySQL, the function of foreign keys is to establish the relationship between tables and ensure the consistency and integrity of the data. Foreign keys maintain the effectiveness of data through reference integrity checks and cascading operations. Pay attention to performance optimization and avoid common errors when using them.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

Notepad++7.3.1
Easy-to-use and free code editor

SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.

SublimeText3 Chinese version
Chinese version, very easy to use

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function
