Issues in OODBMS

• long-duration transaction

• Versions Fig.27.11(26.9)

• Transient, working, released versions

• schema evolution: pp.891(873)

• Architecture

• Client-Server:Object server,page server, database server Fig. 27.14(26.11)
• Storing and executing methods: store in external file, in database Fig. 27.15 (26.12)