GAE: DataStore

charsyam@naver.com

고도의 확장성을 가지는 데이터 위주의 APP 개발의 어려움

Problem 1. Scalability 2. Security 3. Replication 4. maintenance

Problem 1. Scalability 2. Security 3. Replication 4. maintenance

Problem 1. Scalability 2. Security 3. Replication 4. maintenance

Problem 1. Scalability 2. Security 3. Replication 4. maintenance

Google App Engine 1. Distribution 2. Replication 3. Load Balancing 4. BigTable+GFS

Google App Engine 1. Distribution 2. Replication 3. Load Balancing 4. BigTable+GFS

Google App Engine 1. Distribution 2. Replication 3. Load Balancing 4. BigTable+GFS

Google App Engine 1. Distribution 2. Replication 3. Load Balancing 4. BigTable+GFS

Entity N >= 0 Attribute

1 Identifier

Attribute Value Internal Class

Child Object Complex Type

Main Key Field Type Long String without Encoding

Key String with Encoding

Key 가 중복되면 데이터는 OverWrite 된다.

Creating jdoconfig.xml

Setting the Read Policy and Datastore Call Deadline

Getting a PersisitenceManager Instance

Query In JDO

Thank You!