nosql database schema design

. Master-slave replication is also used for automatic backups.Read/write Separation:To ensure consistency of database data, we require that all updates to the database be made against the primary database, but the read operation can be done against the database. Most sites have more intensive

actual storage of the entire database, while the conceptual mode is the abstract representation of the actual storage of the entire database. The external mode is the abstract representation of a part of the conceptual mode. All of these modes must be defined before using the database. The database management system p

Tags: use selection must separate Mil high Availability scheme font comparison ReplicatDatabase is the core of all application systems, so to ensure the stable, efficient and safe operation of the database is the most important work of all enterprises. Once a database system fails to provide services, it may cause the entire system to fail to continue working. Therefore, a successful

Traps in the 4.2MySQL schema design Because the MySQL implementation mechanism causes some specific errors, how to avoid them, and slowly: 1. Too many columns The MySQL storage Engine API works by copying data in a row-buffered format at the server layer and storage engine layer, then decoding the buffered content into columns at the server layer, and converting the encoded columns from row buffers into ro

characteristics of the three-level model structure of database system basically remain unchanged.The external mode, also known as the user mode, is defined as a sub-mode in the traditional database system. A sub-pattern is a subset of conceptual patterns. The external mode defines the data by user view and can also be exported from the conceptual mode.The conceptual model, also known as the logical mode, i

different, the characteristics of the three-level model structure of the database system are basically unchanged.External mode is also called user mode, which is defined as sub-mode in traditional database system, and sub-mode is a subset of conceptual pattern. The external mode defines the data by user view, or it can be exported from the conceptual mode.The conceptual model, also known as the logical mod

Reproduced Original: http://blog.csdn.net/zhangzhaokun/article/details/4711693 large-scale high concurrent high-load Web Application System Architecture-database schema Strategy As Web sites grow in size from small to large, database access pressure is also increasing, the database architecture also needs to dynamica

; "alt=" clip_image003[6] "src=" http:// S3.51cto.com/wyfs02/m00/6c/8a/wkiom1vlpnbdeehyaagiamrgmvk851.jpg "border=" 0 "/>As you can see, even in the Lync Server deployment design where the front-end and back-end are detached, there is actually an SQL instance (SQL EXPRESS) on each Lync server (including the front-end itself) that hosts the backend A copy of some of the databases in the DB instance (although only the CMS

database application, so there will be a large number of database operations in an application, using a singleton mode, you can avoid a large number of new operations to consume resources.2, if the system needs to have a class to control some of the configuration information globally, then using the singleton mode can be easily implemented. This can be see the frontcontroller part of ZF.3, in a page reques

management. This article outlines the features and capabilities of the main representatives of each NoSQL system standby (HBase, MongoDB, and SimpleDB) and their support for different kinds of WEB applications. The foundation of Cloud Database design How does cloud computing change the way people interact with data? Everyone can easily handle data transaction

When the property is done, it is in the schema. In fact, the pattern is just the encapsulation of attributes, and the robustness of the property write, the pattern will be much easier to do.Because I am a little bit of writing code, write before also did not do too many architectural aspects (after all, small program), so there are often changes. Basically changed from Monday to today, the interface changes are not particularly much, but the implement

Reprint Please specify source: Jiq's technical BlogHBase Features:Recently in the learning Hbase,hbase based on the row Jian is indexed, the query speed will be very fast, completely real-time.But if HBase is to query based on fields other than row health, it can only be a full-fledged scan, which is basically unacceptable.So HBase will generally be designed for specific scenarios to design the health, the use of the real-time query based on row healt

Database is the core of all application systems, so to ensure the stable, efficient and safe operation of the database is the most important work of all enterprises. Once a database system fails to provide services, it may cause the entire system to fail to continue working. Therefore, a successful database architectur