?????? ?? Native XML database

1
?????? ?? Native XML database

• ??????? ?????
• ????? ?????
• ???? ?????

2
?????

• ??? XML?
• ????? XML ?? ?????? ?????
• ????? XML ?? ?????? ???? ????? ???
• ????? XML?
• ????? ?????? ???? XML?
• ?????? ?? ?????? ???? XML

3
??? XML?

• ??????? ???? ?? ?? ???? ?? ?????? ?? ???? ?? ???
• ???? ???? ?? ???? ?? ????? ???? ???? ? ???????
  ???? ?? ??????? ? ???????? ????? ?????

4
????? XML ?? ?????? ????

• Storage
• Schema
• Query language
• Programming interface

5
????? XML ?? ?????? ????

• Indexes
• Secutiry
• Transactions
• Concurrency
• Triggers
• Multidocument Query
• Scalability

6
????? XML ?? ?????? ???? ????? ??

• ???? ? XML document
• SQL ? XQL
• ????? ???? ??
• ????? ?? ???? ????? ?? ?? ?? ??? ???? ???? ??? ??
  ???? ????
• ????? ?? ????? ????? ???????

7
????? ???? ??? XML

• Data Centric documents ?????? ???? ??? ???? ??
  ??????? ?? ??? ????? ??? ????
• Document centric documents ????? ??? ??? ????
  ????? ??????? ?? ????

8
????? ?????? ???? ??? XML

• ?????? ???? ????? ?? ?????? ?? XML
• ?????? ???? ??? XML

9
?????? ???? ??? ????? ?? ??????

• Table Based Mapping
• ?? XML Document ?? ?? ????? ?? ???? ??
  ?????? ????
• Object Relational Mapping
• ?? ???????? ?? ???? ?? ?????? XML ????? ?? ???

10
?????? ???? XML

• Text-Based ??????? ???? ?? ?? ???? Text
• Model-based ???? ??? ?? Document ?? ?? ???? ???
  ??????? ?? ???.

11
?????? ???? ??? XML ?????

• ?????? ???? ??? XML ?????
• http//www.rpbourret.com/xml/XMLDatabaseProds.htm
  native

12
?????? ???? ??? ???? ??????

• Exist XML database v1.0(www.exist-db.org)
• Xindice XML database,c1.0(www.xindice.org)
• Sleepycat's Berkeley DB XML 1.2.1
  (www.sleepycat.com)
• ???? ??? ?????? Open Source ???? ??? ?? ? ??????
  ???? ???? ??????

13
?????? eXist

• ????? ???? ??? ???? Java
• Platform independent
• ???? Transaction
• ??????? ?? Xpath-Xquery-Xupdate
• GUI ????

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?????? xIndice

• ????? ???? ??? ???? Java
• Platform independent
• ??????? ?? ???? Text ??????? ????? ???
• ??? ???????? ?? Transaction
• ???????? Xpath ? Xquery

15
??? ????? ??????

• ???????? P4 1.9GHz, 256KB L2 cahce
• ????? 640MB SD DDR
• ????? ???? Windows XP

16
???????????

• ?? ?????? ???? ??? ???? 6 ??? ???? ????? ?? ???
  ???? ???? ???? ??? ???? ?? ? ???? ???? ????
  ??????? ???? ?????? ???? ????? ???.

17
???? ???? ???? ??? ???? ???????

• 300 Data centric documents
• 100 docs of size 300KB each
• 100 docs of size 600KB each
• 100 docs of size 900KB each
• 300 Document centric documents
• 100 docs of size 300KB each
• 100 docs of size 600KB each
• 100 docs of size 900KB each

18
?????

• ????? ???? ??? ????? excel ?? ?????? ????? ????
• ?? ?????? ?? ???? ???? ?????? ?? ??? ???? ??? ???
  ???
• ???? ????? ?? ???? ? ?? ??? ???? ?? ???

19
?????? ???? ???? ??? ???? ??? Data centric

• ???? ?? ?? ???? ?? ?????? ??? ??? ??? ??? ???

20
?????? ???? ???? ??? ???? ??? Document Centric

• ???? ???? ?? ?? ?? ?????? ?????

21
?????? ???? ????? ??? ???? ?? ??? ???? Data
centric

• ?????? ???? ???? ?? ?? ?? ?????? ????? ????? ???
  ???

22
?????? ???? ????? ??? ???? ?? ??? ???? Document
centric

• ?????? ???? ?? ??? ???? ?? ?????? ??? ????? ???
  ??? ???

23
????? ?????

• ???? ??? ?? eXist ????? ???? ??? ?? ????? ????
  ?? ?? persistent DOM object
• ???? ???? ??????? ?? xIndice ???? ???? ??? ?? ??
  ????? ??????? ?? AutoLinking ????.

24
?????

• 1. XML and databases Ronald Bourret, 1999
  http//www/rpbourret.com/xml/XMLAndDatabases.htm,
  
• http//www.rpbourret.com/xml/XMLDatabaseProds.htm
  
• 2. XML / Database Links Ronald Bourret, 2001
• http//www.rpbourret.com/xml/XMLDBLinks.htm
• 3. XPath http//www.w3.org/TR/1999/REC-xpath-1999
  1116.html
• 4. XQL http//metalab.unc.edu/xql/xqlproposal.xml
  
• 5. Why and How to Benchmark XML
  DatabasesSchimdt, Wass, Kersten, Florescu,
  Carey,Manolescu, Busse
• 6. Benchmarking XML Database Systems- First
  Experience Timo Bohme, Erhard Rahm
  http//dbs.uni-leipzig.de
• 7. Efficient XML Data Management An
  AnalysisNambiar, Lacroix, Bressan, Lee and Li,
  Arizona State University
• 8. Benchmarking XML Management Syatems The XOO7
  Way
• 9. What Makes the Difference Benchmarking XML
  Database Implemetations Hongjun Lu, Yu,Wang,
  Zheng, Jiang, Yu and Zhou
• 10. Benchmarking the DB2 XML and Text Extender