gbase数据、南大通用产品文档：GBase8a

GBA-01BR-0079
错误码
错误标识
错误显示信息
GBA-01BR-0079
无
checksum backup point error
错误出现原因
对某个备份点做crc32 失败
分析与建议
备份数据损坏。
1，寻找其他备份数据进行恢复
2，恢复其他可替代备份点

Virtual Clusters
A virtual cluster is developed based on a large-scale cluster, which includes multiple
virtual sub-clusters (VCs). Each VC runs independently within the entire cluster and
shares a unified entry. With permission, VCs can access each other.
The Coordinator node (including Gcluster node and Gcware node) and VC's data
node support running on the same physical node.
Unified Management
By dividing the cluster into virtual sub-clusters, the cluster can reach a scale of
thousands of nodes while providing a unified management view, enhancing the
cluster's scalability.
Unified access entry to the cluster
Figure 4-2. Unified access entry.

GBase 8a MPP Cluster Technical White Paper
- 24 -
General Data Technology Co., Ltd.
Users select any Coordinator node in the Coordinator cluster (which includes the
Gcluster scheduling cluster and the Gcware management cluster, usually deployed
together and referred to as the Coordinator cluster) as the cluster entry point. The
Coordinator node determines the default VC based on user input.
Note: The Coordinator node stores metadata for all VC databases and tables.
Business Isolation
Virtual clusters isolate resources vertically in the cluster, enabling physical resource
isolation for different businesses in real-world business scenarios.
Transparent Access
Virtual clusters provide a unified access point, and accessing multiple physical
clusters is transparent to the application, which appears to be a unified cluster.

关闭方法
方法一：可通过如下命令行关闭事件调度器。
SET GLOBAL event_scheduler = OFF;
SET @@global.event_scheduler = OFF;
SET GLOBAL event_scheduler = 0;
SET @@global.event_scheduler = 0;
方法二：通过配置文件gbase_8a_gbase.cnf 关闭事件调度器。
……
[gbased]
……
event_scheduler = 0 #或者OFF，DISABLED
……
查看调度器线程
gbase> show processlist\G
*************************** 1. row ***************************
Id: 621
User: root
Host: localhost
vc: vc1
db: NULL
Command: Sleep
Time: 376262
State:
Info: NULL
*************************** 2. row ***************************
Id: 883
User: root
Host: 172.168.83.11:44008
vc: NULL
db: NULL
Command: Sleep

GBase 8a MPP Cluster 产品手册
5 数据库管理指南
文档版本953（2022-04-10）
南大通用数据技术股份有限公司
1456
Time: 6
State:
Info: NULL
2 rows in set (Elapsed: 00:00:00.00)