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]]> http://www.mydwbi.com/posts/preList/134/606.page http://www.mydwbi.com/posts/preList/134/606.page GMT Informatica PowerCenter的体系结构


2个Server:
Informatica Repository Server：资料库Server，管理ETL过程中产生的元数据
Informatica Server：ETL引擎


5个Client:
PowerCenter Designer:设计开发环境，定义源及目标数据结构；设计转换规则，生成ETL映射
Workflow Manager：合理的实现复杂的ETL工作流，基于时间，事件的作业调度
Workflow Monitor：监控Workflow和Session运行情况，生成日志和报告
Repository Manager:资料库管理，包括安全性管理等
Repository Server Administrator Console：资料库的建立与维护

Informatica PowerCenter的功能列表：

异构数据源，异构目标
多种缓慢变化维模版
Mapping/Session/Workflow/Server级参数化，支持参数文件
局部变量，前后记录比较
条件汇总
异构数据源关联
行/列互换
静态/动态/条件Lookup
ETL事务处理
自定义
Pre SQL和Post SQL
数据源为文件列表
断点续传
多目标表约束装载
错误数量控制
FTP源和FTP目标
ETL任务分区
增量汇总
测试装载
Bulk Loading
External Loading
多层 workflow 嵌套
复杂组件Mapping逻辑
调用存储过程/外部过程
Custom Transformation
可视化Debugger
强大的函数支持，功能丰富的转换语言
功能丰富的Workflow 控制
任务串行，并行控制
基于时间，事件和指示文件触发任务
Workflow中调用操作系统外部命令
Workflow中调用Email
多ETL Server协同工作


Informatica PowerCenter其他附加功能


Metadata Exchange
以XML的方式进行导入/导出元数据，和Informatica Repository同步，进行元数据交换


Team-based Development
团队开发，对象版本控制，将check in, check out，并且可以以对象为单位部署，查询对象信息。


Partitioning
针对每一个session ，缺省的只有一个进程实现ETL操作，当选择了partition之后，用户可以指定partition的个数和类型，从而实现多进程并发执行，ETL的性能就会显著提高。


Server Grid
PowerCenter以一种灵活的方式，提供将异类服务器聚合在一起分布工作和负载均衡，通过不同的Server分配workflows和sessions.
优点是：
均衡加载任务
更容易规划资源
提供不同层次的控制
session 级
workflow级
server级


Real-Time
实时的数据整合平台
双向的，实时数据集成事务数据或时间切片数据
实时的，永远开通的会话，可以连续集成来自 /消息队列的数据流
对于需要立即处理的，实施的流式传递数据进行零延时数据传输


Data profiling
收集数据源的相关信息，并根据规则形成分析报告，从而达到数据探查的目的。


Data Quality
根据Data profiling的探查结果，进行相应的清洗，合并，重构等操作，包括以下几类：
数据内容错误
缺失数据
无效数据
冗余数据
数据结构问题
无效键值


数据矛盾
同一数据元素多种格式
同一代码值不同意思
同一意思多种代码值


效率驱动。管理变化。确保准确


数据集成服务
以批处理，实时和变化数据捕获进行数据迁移
数据检查
数据清洗
数据转换
数据聚合

转换服务
专注数据质量转换
强大的转换库
预定义的映射和向导
内置的源分析
实时和批处理数据映射的图形界面
设置和改变数据聚合
可扩展转换


连通性服务
本地支持关系型的，主机和IBM iSeries(AS/400)数据库
本地支持EAI和Messaging
支持形成的集成标准，比如XML, Web Services(WSDL, SOAP, UDDI)
连通性SDK


安全服务
基于角色和权限的安全
LDAP鉴定
为其他鉴定的安全
系统访问跟踪
以RSA编密码方式安全传输数据


积极的元数据
专一的，开放的资料库
基于WEB的元数据分析
可重复使用的元数据对象
总是保持自己最新的文档
碰撞分析，数据血统分析，依赖影响分析
可扩展的元数据对象
双向元数据交换
全球和本地元数据管理


可扩展平台
开放，面向服务的架构
客户端，资料库和server SDKs和APIs
支持工业标准，比如Java
商业智能界面和数据模型工具
提供丰富的SDKs和APIs]]> http://www.mydwbi.com/posts/preList/134/607.page http://www.mydwbi.com/posts/preList/134/607.page GMT ]]> http://www.mydwbi.com/posts/preList/134/608.page http://www.mydwbi.com/posts/preList/134/608.page GMT
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