Embedded nosql database db4o

Nosql is a hot topic recently. It can be seen in high-performance and high-concurrency systems. For example, memcached and MongoDB, memcached only supports column-store, And MongoDB does not support transactions. Most importantly, these require server support. In some embedded systems, the hardware environment is overwhelmed by the old bull.

At a friend's suggestion, I tried to use db4o and found that such a good database exists.

The main advantages include:

1. Fully open-source.

2. acid is supported.

3. All supported.

4. Provides the vs2010 plug-in designer.

5. provides two Integration Methods: Embedded Version and server.

Let's take an example to see the benefits of db4o.

Creation object:

 Namespace  Db4objects. db4o. Tutorial. f1.chapter1 {  Public   Class Pilot {  String  _ Name;  Int  _ Points;  Public PILOT ( String Name, Int  Points) {_ name = Name; _ points = Points ;}  Public   String Name {  Get  {  Return  _ Name ;}}  Public   Int  Points {  Get  {  Return  _ Points ;}}  Public   Void Addpoints (Int  Points) {_ points + = Points ;}  Override   Public   String  Tostring (){  Return   String . Format ( "  {0}/{1}  "  , _ Name, _ points );}}} 

Open connection

//Accessdb4oIobjectcontainer DB =Db4ofactory. openfile (util. yapfilename );Try{//Do something with db4o}Finally{DB. Close ();}
 

Storage objects:

//StorefirstpilotPilot pilot1 =NewPILOT ("Michael Schumacher",100); DB. Set (pilot1); console. writeline ("Stored {0}", Pilot1 );
 

During development,CodeVery concise and clear.