GBase 8s 运行模式与切换

GBase 8s的四种运行模式

离线模式

不能执行任何操作
shared memory not initialized for GBASEDBTSERVER ‘gbaseserver’（执行数据库管理员命令时）
908: Attempt to connect to database server (gbaseserver) failed.（执行数据库SQL操作时）
执行dbaccess时，可以出现菜单，选择数据库出现RUNNING后，一段时间报错。

在线模式

可以执行各种操作。

单用户模式

可以执行SQL操作和命令行维护操作。只能管理员（GBASEDBT / DBSA）连接，其它普通用户不能连接。
27010: Only an administrative user can connect in administrative user mode.

静态模式

只能执行命令行维护操作（如备份数据库）。

不能执行SQL命令（27002: No connections are allowed in quiescent mode.）

GBase 8s的3种过渡状态

初始化（Initialization）
快速恢复（Fast Recovery）
关闭（Shutting Down）

GBase 8s的模式转换状态图

GBase 8s 可从一个运行模式,转换到另一个运行模式。

离线转在线

[gbasedbt@devsvr ~]$ gstat -
Your evaluation license will expire on 2022-06-18 00:00:00
shared memory not initialized for GBASEDBTSERVER 'gbaseserver'
[gbasedbt@devsvr ~]$ gserver start
Your evaluation license will expire on 2022-06-18 00:00:00
[gbasedbt@devsvr ~]$ gstat -
Your evaluation license will expire on 2022-06-18 00:00:00
On-Line -- Up 00:00:14 -- 597864 Kbytes[gbasedbt@devsvr ~]$

单用户转在线

[gbasedbt@devsvr ~]$ gstat -
Your evaluation license will expire on 2022-06-18 00:00:00
Single-User -- Up 00:04:33 -- 597864 Kbytes[gbasedbt@devsvr ~]$ gadmin -m
Your evaluation license will expire on 2022-06-18 00:00:00
[gbasedbt@devsvr ~]$ gstat -
Your evaluation license will expire on 2022-06-18 00:00:00
On-Line -- Up 00:04:53 -- 597864 Kbytes[gbasedbt@devsvr ~]$

静态转在线

[gbasedbt@devsvr ~]$ gstat -
Your evaluation license will expire on 2022-06-18 00:00:00
Quiescent -- Up 00:00:15 -- 597864 Kbytes[gbasedbt@devsvr ~]$ gadmin -m
Your evaluation license will expire on 2022-06-18 00:00:00
[gbasedbt@devsvr ~]$ gstat -
Your evaluation license will expire on 2022-06-18 00:00:00
On-Line -- Up 00:00:49 -- 597864 Kbytes[gbasedbt@devsvr ~]$

在线转单用户

[gbasedbt@devsvr ~]$ gstat -
Your evaluation license will expire on 2022-06-18 00:00:00
On-Line -- Up 00:00:56 -- 597864 Kbytes[gbasedbt@devsvr ~]$ gadmin -j
Your evaluation license will expire on 2022-06-18 00:00:00
This will change mode to single user. Only DBSA/gbasedbt can connect
in this mode.
Do you wish to continue (y/n)? yAll threads which are not owned by DBSA/gbasedbt will be killed.
Do you wish to continue (y/n)? y
[gbasedbt@devsvr ~]$ gstat -
Your evaluation license will expire on 2022-06-18 00:00:00
Single-User -- Up 00:01:25 -- 597864 Kbytes[gbasedbt@devsvr ~]$

单用户转离线

[gbasedbt@devsvr ~]$ gstat -
Your evaluation license will expire on 2022-06-18 00:00:00
Single-User -- Up 00:00:14 -- 597864 Kbytes[gbasedbt@devsvr ~]$ gserver stop
Your evaluation license will expire on 2022-06-18 00:00:00This will take GBase Database Server OFF-LINE -
Do you wish to continue (y/n)? yThere are 0 user threads that will be killed.
Do you wish to continue (y/n)? y
[gbasedbt@devsvr ~]$ gstat -
Your evaluation license will expire on 2022-06-18 00:00:00
shared memory not initialized for GBASEDBTSERVER 'gbaseserver'
[gbasedbt@devsvr ~]$

在线转离线

[gbasedbt@devsvr ~]$ gstat -
Your evaluation license will expire on 2022-06-18 00:00:00
On-Line -- Up 00:04:53 -- 597864 Kbytes[gbasedbt@devsvr ~]$ gserver stop
Your evaluation license will expire on 2022-06-18 00:00:00This will take GBase Database Server OFF-LINE -
Do you wish to continue (y/n)? yThere are 0 user threads that will be killed.
Do you wish to continue (y/n)? y
[gbasedbt@devsvr ~]$ gstat -
Your evaluation license will expire on 2022-06-18 00:00:00
shared memory not initialized for GBASEDBTSERVER 'gbaseserver'
[gbasedbt@devsvr ~]$

在线转静态

[gbasedbt@devsvr ~]$ gstat -
Your evaluation license will expire on 2022-06-18 00:00:00
On-Line -- Up 00:00:14 -- 597864 Kbytes[gbasedbt@devsvr ~]$ gadmin -s
Your evaluation license will expire on 2022-06-18 00:00:00This will perform a GRACEFUL SHUTDOWN -
Do you wish to continue (y/n)? y
[gbasedbt@devsvr ~]$ gstat -
Your evaluation license will expire on 2022-06-18 00:00:00
Quiescent -- Up 00:00:45 -- 597864 Kbytes[gbasedbt@devsvr ~]$

或

[gbasedbt@devsvr ~]$ gstat -
Your evaluation license will expire on 2022-06-18 00:00:00
On-Line -- Up 00:00:38 -- 597864 Kbytes[gbasedbt@devsvr ~]$ gadmin -u
Your evaluation license will expire on 2022-06-18 00:00:00This will perform an IMMEDIATE SHUTDOWN -
Do you wish to continue (y/n)? yThere are 0 user threads that will be killed.
Do you wish to continue (y/n)? y
[gbasedbt@devsvr ~]$ gstat -
Your evaluation license will expire on 2022-06-18 00:00:00
Quiescent -- Up 00:00:53 -- 597864 Kbytes[gbasedbt@devsvr ~]$

静态转离线

[gbasedbt@devsvr ~]$ gstat -
Your evaluation license will expire on 2022-06-18 00:00:00
Quiescent -- Up 00:00:45 -- 597864 Kbytes[gbasedbt@devsvr ~]$ gserver stop
Your evaluation license will expire on 2022-06-18 00:00:00This will take GBase Database Server OFF-LINE -
Do you wish to continue (y/n)? yThere are 0 user threads that will be killed.
Do you wish to continue (y/n)? y
[gbasedbt@devsvr ~]$ gstat -
Your evaluation license will expire on 2022-06-18 00:00:00
shared memory not initialized for GBASEDBTSERVER 'gbaseserver'
[gbasedbt@devsvr ~]$

GBase 8s的模式转换状态表

	离线	在线	单用户	静态
离线		gserver start
在线	gserver stop		gadmin -j	gadmin –s gadmin -u
单用户	gserver stop	gadmin -m		gadmin –s gadmin -u
静态	gserver stop	gadmin -m	gadmin -j