Gbase 8s overall architecture

        GBase 8s  Adopt dynamic server architecture DSA（Dynamic Server Architecture） Model , be based on DSA The architecture technology of GBase 8s It has inherent advantages in high performance and scalability ： Can handle hundreds of TB The data of , Support tens of thousands of concurrent users .GBase 8s Of DSA Multi thread processing mechanism built in the architecture , As well as dynamic and self managed shared memory and flexible logical data storage and management capabilities , It makes full use of all the hardware resources to deal with massive user data .

        GBase 8s The overall architecture consists of three important components ： processor 、 Shared memory and disk .

 

1. Processor components

Physics CPU Virtual is an internal logical processor （VP）, Divided into different types according to their functions , It mainly includes CPU、AIO、PIO、LIO etc. .

2. Shared memory components

Shared memory consists of three components , They are ： Resident memory segment 、 Virtual segments and message segments , Each section is used to store different information .

3. Disk components

        DBSPACE Is the highest visible disk management component in the database server ,DBSPACE Is a logical management unit , It mainly includes the following contents .

（1）Rootdbs Root database tablespace , Contains key information about the database server 、 Reserved page （reserve pages）、 Multiple GBase 8t System database data .

（2） Physical log tablespace , Used to keep physical log information .

（3） Logical log tablespace , Used to keep logical log information .

（4） Temporary table space , Used to keep temporary table data 、 Sort and so on .

（5） User data table space , A user-defined table space for storing data .

         In a GBase 8t Multiple instances can be created DBSPACE, You can also create multiple databases Database. When creating a database , We need to specify the default of the table space DBSPACE, Then create a table in the database , When the table is created , If no table is specified DBSPACE Information , The table will adopt the default of the database DBSPACE To store data . When the table is created , We can also pass in dbspacename Option specifies the location of the table store DBSPACE, You can also slice the table , Store data on multiple tablespaces . The tables in the database connect the database and DBSPACE Connect .