标签：00 en 备库 R3 UTF system kingbase 为单 data
案例说明：
在生产环境需要将集群中架构转换为单实例环境，本案例以备库转换为单实例库为案例，介绍了两种方案，一种在数据库数据量小的环境下采用 sys_dumpall 导出导入方式建立单实例库；另外一种是在数据量大的情况下，采用物理copy的方式建立单实例库。
案例数据库版本:
PROD=# select version();
VERSION ------------------------------------------------------------------------------------------------------------------
Kingbase V008R003C002B0270 on x86_64-unknown-linux-gnu, compiled by gcc (GCC) 4.1.2 20080704 (Red Hat 4.1.2-46), 64-bit
(1 row)
案例架构：
查看集群状态：
1、集群节点状态
[kingbase@node1 bin]$ ./ksql -U SYSTEM -W 123456 TEST -h 192.168.7.243 -p 9999
ksql (V008R003C002B0270)
Type "help" for help.
TEST=# show pool_nodes;
node_id | hostname | port | status | lb_weight | role | select_cnt | load_balance_node | replication_del
ay
---------+---------------+-------+--------+-----------+---------+------------+-------------------+----------------
---
0 | 192.168.7.243 | 54321 | up | 0.500000 | primary | 0 | false | 0
1 | 192.168.7.248 | 54321 | up | 0.500000 | standby | 0 | true | 0
(2 rows)
2）流复制状态
[kingbase@node3 bin]$ ./ksql -U SYSTEM -W 123456 TEST
ksql (V008R003C002B0270)
Type "help" for help.
TEST=# select * from sys_stat_replication;
PID | USESYSID | USENAME | APPLICATION_NAME | CLIENT_ADDR | CLIENT_HOSTNAME | CLIENT_PORT | BACKEND_ST
ART | BACKEND_XMIN | STATE | SENT_LOCATION | WRITE_LOCATION | FLUSH_LOCATION | REPLAY_LOCATION | SYNC_
PRIORITY | SYNC_STATE
------+----------+---------+------------------+---------------+-----------------+-------------+-------------------
3393 | 10 | SYSTEM | node2 | 192.168.7.248 | | 9968 | 2021-03-01 12:09:1
2.662830+08 | | streaming | 0/B0CC040 | 0/B0CC040 | 0/B0CC040 | 0/B0CC040 | 2 | sync
(1 row)
案例一： sys_dumpall导出导入方式（用于数据量小的架构，在生产环境下，不能保证单实例库的数据和集群中的数据是一致的）。
1、集群测试数据
PROD=# create table t1 (id int ,name varchar(10));
CREATE TABLE
PROD=# insert into t1 values(generate_series(1,10000),'usr'||generate_series(1,10000));
INSERT 0 10000
PROD=# select count(*) from t1;
COUNT
-------
10000
(1 row)
2、在备库主机创建新的实例
# 创建单实例库数据目录
[kingbase@node1 bin]$ mkdir -p /data/kingbase/v8r3c/data
# 初始化单实例库
[kingbase@node1 bin]$ pwd
/home/kingbase/cluster/ha/db/bin
[kingbase@node1 bin]$ ./initdb -U system -W 123456 -E utf8 --case-insensitive -D /data/kingbase/v8r3c/data
.....
Success. You can now start the database server using:
./sys_ctl -D /data/kingbase/v8r3c/data -l logfile start
3、从备库备份数据（sys_dumpall）
[kingbase@node1 bin]$ ./sys_dumpall -U SYSTEM -W 123456 > ~/db.sql
sys_dumpall: role name starting with "sys_" skipped (SYSSAO)
sys_dumpall: role name starting with "sys_" skipped (SYSSSO)
sys_dumpall: role name starting with "sys_" skipped (SYSTEM)
4、启动单实例数据库并导入数据
# 启动数据库服务
[kingbase@node1 bin]$ ./sys_ctl start -D /data/kingbase/v8r3c/data/
server starting
[kingbase@node1 bin]$ LOG: redirecting log output to logging collector process
HINT: Future log output will appear in directory "sys_log".
[kingbase@node1 bin]$ netstat -an |grep 54323
tcp 0 0 0.0.0.0:54323 0.0.0.0:* LISTEN
tcp6 0 0 :::54323 :::* LISTEN
unix 2 [ ACC ] STREAM LISTENING 42092 /tmp/.s.KINGBASE.54323
You have mail in /var/spool/mail/kingbase
# 连接数据库并导入数据
[kingbase@node1 bin]$ ./ksql -U system -W 123456 test -p 54323
ksql (V008R003C002B0270)
Type "help" for help.
test=# \l
List of databases
Name | Owner | Encoding | Collate | Ctype | Access privileges
-----------+--------+----------+-------------+-------------+--------------------
SAMPLES | system | UTF8 | en_US.UTF-8 | en_US.UTF-8 |
SECURITY | system | UTF8 | en_US.UTF-8 | en_US.UTF-8 |
TEMPLATE0 | system | UTF8 | en_US.UTF-8 | en_US.UTF-8 | =c/system +
| | | | | system=CTcb/system
TEMPLATE1 | system | UTF8 | en_US.UTF-8 | en_US.UTF-8 | =c/system +
| | | | | system=CTcb/system
TEMPLATE2 | system | UTF8 | en_US.UTF-8 | en_US.UTF-8 | =Tc/system +
| | | | | system=CTcb/system
TEST | system | UTF8 | en_US.UTF-8 | en_US.UTF-8 |
(6 rows)
# 导入备库备份数据
test=# \i /home/kingbase/db.sql
SET
SET
SET
CREATE DATABASE
ksql:/home/kingbase/db.sql:25: ERROR: database "SECURITY" already exists
REVOKE
GRANT
You are now connected to database "PROD" as user "system".
SET
SET
SET
SET
SET
SET
set_config
-----------------
"$USER", PUBLIC
(1 row)
.......
5、查看单实例库数据
TEST=# \l
List of databases
Name | Owner | Encoding | Collate | Ctype | Access privileges
-----------+--------+----------+-------------+-------------+--------------------
PROD | system | UTF8 | en_US.UTF-8 | en_US.UTF-8 |
SAMPLES | system | UTF8 | en_US.UTF-8 | en_US.UTF-8 |
SECURITY | system | UTF8 | en_US.UTF-8 | en_US.UTF-8 |
TEMPLATE0 | system | UTF8 | en_US.UTF-8 | en_US.UTF-8 | =c/system +
| | | | | system=CTcb/system
TEMPLATE1 | system | UTF8 | en_US.UTF-8 | en_US.UTF-8 | system=CTcb/system+
| | | | | =c/system
TEMPLATE2 | system | UTF8 | en_US.UTF-8 | en_US.UTF-8 | =Tc/system +
| | | | | system=CTcb/system
TEST | system | UTF8 | en_US.UTF-8 | en_US.UTF-8 |
(7 rows)
TEST=# \c PROD
You are now connected to database "PROD" as user "system".
PROD=# \d
List of relations
Schema | Name | Type | Owner
--------+-------------------------------+-------+--------
PUBLIC | pathman_cache_stats | view | system
PUBLIC | pathman_concurrent_part_tasks | view | system
PUBLIC | pathman_config | table | system
PUBLIC | pathman_config_params | table | system
PUBLIC | pathman_partition_list | view | system
PUBLIC | T1 | table | system
(6 rows)
PROD=# select count(*) from t1;
count
-------
10000
(1 row)
=== 从以上可以获知，集群中的数据已经导入到单实例库中，此时可以停止备库或删除集群===
案例2：物理拷贝方式（如果单实例库数据需要和集群数据一致，需要停止整个集群；如果不需要一致，只需要停止备库数据库服务即可）。
1、集群测试数据
PROD=# \d
List of relations
Schema | Name | Type | Owner
--------+-------------------------------+-------+--------
PUBLIC | PATHMAN_CACHE_STATS | view | SYSTEM
PUBLIC | PATHMAN_CONCURRENT_PART_TASKS | view | SYSTEM
PUBLIC | PATHMAN_CONFIG | table | SYSTEM
PUBLIC | PATHMAN_CONFIG_PARAMS | table | SYSTEM
PUBLIC | PATHMAN_PARTITION_LIST | view | SYSTEM
PUBLIC | T1 | table | SYSTEM
PUBLIC | T2 | table | SYSTEM
PUBLIC | T3 | table | SYSTEM
(8 rows)
PROD=# select count(*) from t1;
COUNT
-------
10000
(1 row)
.......
2、备库生成检查点
PROD=# checkpoint;
CHECKPOINT
3、停止备库cron任务和数据库服务
[root@node1 ~]# cat /etc/cron.d/KINGBASECRON
.......
#*/1 * * * * root /home/kingbase/cluster/ha/db/bin/network_rewind.sh
#*/1 * * * * root /home/kingbase/cluster/ha/kingbasecluster/bin/restartcluster.sh
# 停止备库数据库服务
[kingbase@node1 bin]$ ./sys_ctl stop -D ../data
waiting for server to shut down.... done
server stopped
4、建立单实例库
# 创建单实例库数据目录
[kingbase@node1 bin]$ mkdir -p /data/kingbase/v8r3c/data
# 初始化单实例库
[kingbase@node1 bin]$ ./initdb -U system -W 123456 -E utf8 --case-insensitive -D /data/kingbase/v8r3c/data
The files belonging to this database system will be owned by user "kingbase".
This user must also own the server process.
......
5、拷贝备库数据到单实例库
[kingbase@node1 v8r3c]$ mv data data.bk
[kingbase@node1 v8r3c]$ mkdir data
# 拷贝备库数据到单实例库
[kingbase@node1 data]$ cp -var * /data/kingbase/v8r3c/data/
‘backup_label.old’ -> ‘/data/kingbase/v8r3c/data/backup_label.old’
‘base/1/1255’ -> ‘/data/kingbase/v8r3c/data/base/1/1255’
‘base/1/1255_fsm’ -> ‘/data/kingbase/v8r3c/data/base/1/1255_fsm’
‘base/1/1247’ -> ‘/data/kingbase/v8r3c/data/base/1/1247’
‘base/1/1247_fsm’ -> ‘/data/kingbase/v8r3c/data/base/1/1247_fsm’
.......
6、修改data下的recovery.conf文件
[kingbase@node1 data]$ mv recovery.conf recovery.conf.bk
7、启动单实例库数据库服务
[kingbase@node1 bin]$ ./sys_ctl start -D /data/kingbase/v8r3c/data
server starting
[kingbase@node1 bin]$ LOG: redirecting log output to logging collector process
HINT: Future log output will appear in directory "/home/kingbase/cluster/ha/db/data/sys_log".
[kingbase@node1 bin]$ ps -ef |grep kingbase
kingbase 21482 1 1 14:08 pts/1 00:00:00 /home/kingbase/cluster/ha/db/bin/kingbase -D /data/kingbase/v8r3c/data
kingbase 21484 21482 0 14:08 ? 00:00:00 kingbase: logger process
kingbase 21487 21482 0 14:08 ? 00:00:00 kingbase: checkpointer process
kingbase 21488 21482 0 14:08 ? 00:00:00 kingbase: writer process
kingbase 21489 21482 0 14:08 ? 00:00:00 kingbase: wal writer process
kingbase 21490 21482 0 14:08 ? 00:00:00 kingbase: autovacuum launcher process
kingbase 21491 21482 0 14:08 ? 00:00:00 kingbase: archiver process
kingbase 21492 21482 0 14:08 ? 00:00:00 kingbase: stats collector process
kingbase 21493 21482 0 14:08 ? 00:00:00 kingbase: bgworker: syslogical supervisor
......
8、验证和查看单实例库数据
[kingbase@node1 bin]$ ./ksql -U SYSTEM -W 123456 PROD -p 54321
ksql (V008R003C002B0270)
Type "help" for help.
PROD=# \d
List of relations
Schema | Name | Type | Owner
--------+-------------------------------+-------+--------
PUBLIC | PATHMAN_CACHE_STATS | view | SYSTEM
PUBLIC | PATHMAN_CONCURRENT_PART_TASKS | view | SYSTEM
PUBLIC | PATHMAN_CONFIG | table | SYSTEM
PUBLIC | PATHMAN_CONFIG_PARAMS | table | SYSTEM
PUBLIC | PATHMAN_PARTITION_LIST | view | SYSTEM
PUBLIC | T1 | table | SYSTEM
PUBLIC | T2 | table | SYSTEM
PUBLIC | T3 | table | SYSTEM
(8 rows)
PROD=# select count(*) from t1;
COUNT
-------
10000
(1 row)
=== 从以上获知，备库的数据已经同步到单实例库===
总结：
1、本案例是在原集群架构外，另外创建单实例，完成从集群到单实例库的转换，也可以直接在原集群上转换，不再赘述。
2、转换为单实例库后，可以按照生产要求 ，删除或保留原集群架构。
3、另外集群主库转换为单实例库，方法基本和此案例一致。标签：00,en,备库,R3,UTF,system,kingbase,为单,data 来源： https://www.cnblogs.com/kingbase/p/15851862.html
本站声明： 1. iCode9 技术分享网（下文简称本站）提供的所有内容，仅供技术学习、探讨和分享； 2. 关于本站的所有留言、评论、转载及引用，纯属内容发起人的个人观点，与本站观点和立场无关； 3. 关于本站的所有言论和文字，纯属内容发起人的个人观点，与本站观点和立场无关； 4. 本站文章均是网友提供，不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属；如您发现该文章侵犯了您的权益，可联系我们第一时间进行删除； 5. 本站为非盈利性的个人网站，所有内容不会用来进行牟利，也不会利用任何形式的广告来间接获益，纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。