Big Data Developer(Day01)

1. Spring : Framework - > layer: ①cloud platform;②Big Data application;③machine algorithm - > cooperation

2. Hadoop(Cluster): 

①copy

 ②burst

3. Cloud Computing: 

①SAOS(software as a service): app;

②:PAOS(platform as a service):Alibaba Cloud; M - health and smart healthcare;

③IAOS(infrastructure as a service):Tencent

4.  Middle-ware is an independent system software or service program that allows distributed applications to share resources among different technologies.

5.

UserData DB

10t -- 100t  GB     mysql(cluster)

100t -- 5000t                          TB     mongoDB(cluster)

5000t -- 1b  PB     hadoop(cluster)

6. System performence:

①Throughput capacity = concurrency / response

7.

Jason:{"name":"Eason","sex":"M",.....}

Jason(array):{{"name":"Eason"},{"sex":"M"},.....}

Heterogeneous Platforms

8.Observer pattern:

As long as a system send message, and received by several systems, it called Observer pattern.