Couchbase 提供以下好處:
-Flexible Data Model: 彈性的資料模型
-Easy Scalability: 易擴展性
-Consistent High Performance: 持續高性能
-“Always Online”: 一直上線
Couchbase 與傳統RMDB比較:
| Couchbase Server | Traditional Relational Database (RDBMS) |
|---|
|
Rapidly scalable to millions of users.快速擴展至數百萬使用者.
|
Scalable to thousands of users.擴展至數千使用者. |
| Data can be structured, semi-structured, and unstructured. 資料可以為結構, 半結構, 無結構. |
Data must be normalized.資料必須正規化. |
| Built on modern reality of relatively inexpensive. plentiful memory.建立在現實便宜大量記憶體上. |
Built on assumption of scarce, expensive memory.建立在稀少昂貴記憶體的假設上. |
| Built for environments with high-speed data networking.建在高速資料網路上. |
Built at a time when networking still formative and slow.在網路尚在成形與慢速時建立. |
| Data can be flexibly stored as JSON documents or binary data. No need to predefine data types.資料以JSON文件或二位元格式儲存. 無須預設資料格式. |
Data types must be predefined for columns.資料必須預設欄位. |
| Does not require knowledge or use of SQL as query language. |
Requires SQL as query language. |
| Highly optimized for retrieve and append operations; high-performance for data-intensive applications, such as serving pages on high-traffic websites; can handle a large number of documents and document read/writes. |
Significantly slower times for retrieving and committing data. Designed for occasional, smaller read/write transactions and infrequent larger batch transactions. |
| Data stored as key-document pairs; well suited for applications which handle rapidly growing lists of elements. |
Data stored in tables with fixed relations between tables. |
| Does not require extensive data modeling; data structure is of lesser significance during development. |
Data modeling and establishing relational model for data structures required during application development. |
| Asynchronous operations and optimistic concurrency enable applications designed for high throughput. |
Strict enforcement of data integrity and normalization, with the tradeoff of lower performance and slower response times. |
Applications on Couchbase Server: Couchbase 伺服器應用:
-Session Store
-Social Gaming
-Ad, Offer and Content Targeting
Comparing Document-Oriented and Relational Data:
文件基礎與關聯式資料比較
左邊為RMDB Table. 右邊為JSON 文件.
關聯式資料的正規化表格儲存:
JSON文件平坦式資料表示法:
docs.couchbase.com/couchbase-devguide-2.5/
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Introduction to Couchbase¶. Couchbase Server is a NoSQL document database for interactive web applications. It has a flexible data model, is easily scalable, ...
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