All 20 entries tagged Review

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July 15, 2006

Coach for diversity

2 out of 5 stars

I recently participated a pilot project "Coach for diversity" organized by Warwick and LSE.

This book is the one I must read before next stage started. It is the first time after graduation I will be forced to read a book.

April 27, 2006

Hibernate 3

3 out of 5 stars
  • P151: Open Session view is not the first choice. Should fecht the completed required graph in the first place, using HQL or criteria queries, with a sensible and optimized defualt fetching strategy in the maping metadata for all other cases
  • P110: Line10 How to interpret that?

Thus if we noly call items.getBids().add(bid), no changes will be made persistent

With cascade=”all”, hibernte will persist the bid instance. However, the value of the foreign key column is not set

March 06, 2006

Cost Based Oracle

4 out of 5 stars

I began to read this book. I attended several presentations by this book’s author,Johnathan Lewis, in UKOUG conference and some were quite impressive.
This book is definitely a dream-killer. I cannot fall asleep after reading this, for you have to be very vigilant. I brought this book back to office.

P101: Columns order: put columns that appear with a range-based predicate toward the end of index definition; improve the compressibility of an index by putting the least selective(most repetitive) columns first

P69 Index-driven access path:
 cost  = blevel + 
            leaf_blocks * effective_index_selectivity +
           clustering_factor * effective_table_selectivity

effective_index_selectivity MIGHT = 1/distinct_keys (in user_indexes table)

P52 selectivity = “required range”divided by “total available range”

February 21, 2006

My first English crime story

4 out of 5 stars
Very interesting. I read it through in one day.

January 27, 2006


5 out of 5 stars

Great Book.It bring me the whole world of refactoring.

Eclipse IDE makes refactoring job a joyable task. I can seriously say: it is fun.


2 out of 5 stars

Not very good


10g Complete Reference

2 out of 5 stars

Not very good. Superficially cover too many contents.


Oracle BAckup & Recovery Handbook

4 out of 5 stars

A old version Oracle book, talking about Oracle 9i, 2 generations behide now.

It once helped me a lot and the pricipals still apply


4 out of 5 stars

A good book, but it is not very well organized.

Duplicate to a Remote Server P408

  • have to either copy backups to or NTF mount backups at the remote serve
  • copy archivelogs from target to auxiliary
  • On target server, configure tnsnames.ora to point auxilariy instnce; On auxiliary sitse, need to edit listener.ora
  • rman target / auxiliary system/*@auxi_server
  • sql 'alter system switch logfile';
  • duplicate target database to nofilenamecheck pfile=/pfile/init.ora logfile '/loca1' size 100m, '/loca2' size 100m
  • Other clauses include: 1) skip tablespace 'users','tools' ; 2) until sequcne =1 thread = 1

Duplicate to a Same Server P406

  • make sure db_file_name_convert = ('target','aux');

High Availability

4 out of 5 stars

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