「YashanDB个人版体验」以DBA角度深度体验YashanDB

vi /root/script/config_system.sh

########################################################################
#!/bin/bash
#############################
## Author: Rae
## Date: 20231123
## Version: 0.1
#############################

##1. 开发环境调试模式
cat >> /etc/security/limits.conf <<EOF
soft core unlimited
hard core unlimited
EOF
ulimit -c unlimited

##2. 关闭交换分区
echo "vm.swappiness = 0">> /etc/sysctl.conf
sysctl -w vm.swappiness=0

##3. 配置自动调整本地端口范围
sysctl -w net.ipv4.ip_local_port_range='32768 60999'
echo "net.ipv4.ip_local_port_range = 32768 60999" >> /etc/sysctl.conf

##4. 调整进程的VMA上限
echo "vm.max_map_count=2000000" >> /etc/sysctl.conf
sysctl -w vm.max_map_count=2000000

##5. 调整资源限制值
cat >> /etc/security/limits.conf <<EOF
* soft nofile 65536
* hard nofile 65536
* soft nproc 65536
* hard nproc 65536
* soft rss unlimited
* hard rss unlimited
* soft stack 8192
* hard stack 8192
EOF

##6. 关闭透明大页
echo never > /sys/kernel/mm/transparent_hugepage/enabled
echo never > /sys/kernel/mm/transparent_hugepage/defrag
cat >> /etc/rc.local <<EOF
echo never > /sys/kernel/mm/transparent_hugepage/enabled
echo never > /sys/kernel/mm/transparent_hugepage/defrag
EOF
chmod +x /etc/rc.local

##7. 关闭防火墙
systemctl stop firewalld 
systemctl disable firewalld

##8. 历史残留配置文件
rm -f /etc/ld.so.conf.d/yashandb*.conf

##9. 清理共享内存
ipcrm -a
########################################################################

chmod +x /root/script/optimize_system.sh
sh /root/script/optimize_system.sh > /dev/null

1.1.2 数据库安装

脚本说明：
##操作系统用户密码：yashan/yashan
##数据库用户密码：sys/yashan#2023

##安装包上传到/home/yashan下，root用户授权
chown yashan.YASDBA yashandb-personal-23.1.1.100-linux-x86_64.tar.gz

vi /home/yashan/script/yashan_install.sh
########################################################################
#!/bin/bash
#############################
## Author: Rae
## Date: 20231123
## Version: 0.1
#############################

##1. 创建用户
useradd -d /home/yashan -m yashan
groupadd YASDBA
usermod -a -G YASDBA yashan 
echo "yashan" | passwd --stdin yashan

##2. 配置sudo免密
cat >> /etc/sudoers <<EOF
yashan  ALL=(ALL) NOPASSWD:ALL
EOF
chmod -w /etc/sudoers

##3. 创建目录
mkdir -p /data/yashan/{soft,data,yashan}
chown -R yashan.YASDBA /data 
chmod 755 /data

##4. 解压软件
tar xzf /home/yashan/yashandb-personal-23.1.1.100-linux-x86_64.tar.gz -C /data/yashan/soft

##5. 数据库安装部署
cd /data/yashan/soft/
yashan_soft="/data/yashan/soft"
#生成数据库部署文件
${yashan_soft}/bin/yasboot package se gen --cluster yashandb -u yashan -p yashan --ip 127.0.0.1 --port 22 --install-path /data/yashan/yashan/yasdb_home --data-path /data/yashan/data/yasdb_data --begin-port 1688
#执行数据库安装，结束之后会启动yasagent和yasom两个
${yashan_soft}/bin/yasboot package install -t hosts.toml -i /home/yashan/yashandb-personal-23.1.1.100-linux-x86_64.tar.gz
#数据库部署
${yashan_soft}/bin/yasboot cluster deploy -t yashandb.toml

##6. 环境变量配置
cat /data/yashan/yashan/yasdb_home/yashandb/23.1.1.100/conf/yashandb.bashrc >> /home/yashan/.bash_profile
source ~/.bash_profile

##7. 修改sys用户口令
${yashan_soft}/bin/yasboot cluster password set -n yashan#2023 -c yashandb

##8. 查看数据库状态
${yashan_soft}/bin/yasboot cluster status -c yashandb -d

##9. 崖山登录测试
${yashan_soft}/bin/yasql sys/yashan#2023@127.0.0.1:1688 -c "select 'Hello, yashan' from dual;"
########################################################################

chmod +x /home/yashan/script/yashan_install.sh
sh /home/yashan/script/yashan_install.sh 

## 看到命令结束，回显输出OPEN状态，即表示数据库安装完成。

1.2 可视化安装

1.2.1 操作系统环境配置

vi /root/script/config_system.sh

########################################################################
#!/bin/bash
#############################
## Author: Rae
## Date: 20231123
## Version: 0.1
#############################

##1. 开发环境调试模式
cat >> /etc/security/limits.conf <<EOF
soft core unlimited
hard core unlimited
EOF
ulimit -c unlimited

##2. 关闭交换分区
echo "vm.swappiness = 0">> /etc/sysctl.conf
sysctl -w vm.swappiness=0

##3. 配置自动调整本地端口范围
sysctl -w net.ipv4.ip_local_port_range='32768 60999'
echo "net.ipv4.ip_local_port_range = 32768 60999" >> /etc/sysctl.conf

##4. 调整进程的VMA上限
echo "vm.max_map_count=2000000" >> /etc/sysctl.conf
sysctl -w vm.max_map_count=2000000

##5. 调整资源限制值
cat >> /etc/security/limits.conf <<EOF
* soft nofile 65536
* hard nofile 65536
* soft nproc 65536
* hard nproc 65536
* soft rss unlimited
* hard rss unlimited
* soft stack 8192
* hard stack 8192
EOF

##6. 关闭透明大页
echo never > /sys/kernel/mm/transparent_hugepage/enabled
echo never > /sys/kernel/mm/transparent_hugepage/defrag
cat >> /etc/rc.local <<EOF
echo never > /sys/kernel/mm/transparent_hugepage/enabled
echo never > /sys/kernel/mm/transparent_hugepage/defrag
EOF
chmod +x /etc/rc.local

##7. 关闭防火墙
systemctl stop firewalld 
systemctl disable firewalld

##8. 历史残留配置文件
rm -f /etc/ld.so.conf.d/yashandb*.conf

##9. 清理共享内存
ipcrm -a
########################################################################

chmod +x /root/script/optimize_system.sh
sh /root/script/optimize_system.sh > /dev/null

1.2.1 数据库安装

##1. 创建用户
useradd -d /home/yashan -m yashan
groupadd YASDBA
usermod -a -G YASDBA yashan 
echo "yashan" | passwd --stdin yashan

##2. 配置sudo免密
cat >> /etc/sudoers <<EOF
yashan  ALL=(ALL) NOPASSWD:ALL
EOF
chmod -w /etc/sudoers

##3. 创建目录
mkdir -p /data/yashan/{soft,data,yashan}
chown -R yashan.YASDBA /data 
chmod 755 /data

##4. 解压软件
tar xzf /home/yashan/yashandb-personal-23.1.1.100-linux-x86_64.tar.gz -C /data/yashan/soft

##5. 启动web页面访问
yashan_soft="/data/yashan/soft"
${yashan_soft}/bin/yasom --web --listen 10.28.12.22:9001

##6. 配置环境变量
cat /home/yashan/yashan/yasdb_home/yashandb/23.1.1.100/conf/yashandb.bashrc >> ~/.bash_profile

source ~/.bash_profile
yasql sys/password@10.28.12.22:1688

##########################################################################
注意：存在节点的内存限制，最小为 1536M,每台主机的节点的内存限制之和不能大于此主机的内存限制。

默认建库的语句如下：
CREATE DATABASE yashandb CHARACTER SET utf8 LOGFILE('?/dbfiles/redo1' SIZE 128M BLOCKSIZE 4K,'?/dbfiles/redo2' SIZE 128M BLOCKSIZE 4K,'?/dbfiles/redo3' SIZE 128M BLOCKSIZE 4K,'?/dbfiles/redo4' SIZE 128M BLOCKSIZE 4K)            ARCHIVELOG ;
##########################################################################

2. 数据库维护

先说说总体体验

Yashan的大部分视图与Oracle一致，学习成本较低，有Oracle基础的比较容易上手。

Yashan关于历史视图的内容较少，历史事件回溯比较困难。

Yashan性能分析工具比较单一，awr输出内容相对比较简单，sql性能分析的工具较有限。

恢复演练测试中发现Yashan缺少手工创建控制文件、自定义数据文件、日志文件路径功能。

AWR报告无法直接导出，还需要手工复制粘贴，ADDM功能暂未能体现出来。

针对单个SQL的跟踪优化，是否能提供类似Oracle的sql monitor功能。

2.1 日常维护

整理了日常运维工作中常用的SQL，如数据库启停、表空间情况、慢日志、锁定位分析等内容供参考~

##数据库启停
yasboot process yasagent start -c yashandb
yasboot process yasagent status -c yashandb
yasboot process yasom start -c yashandb
yasboot process yasom status -c yashandb
-- 由于服务都是通过yasboot工具管理 ，所以必须先启动om和agent服务。

##查看状态
yasql sys/yashan#2023@127.0.0.1:1688 -c "select database_name  from v\$database;"
yasql sys/yashan#2023@127.0.0.1:1688 -c "select status from v\$instance;"
yasboot cluster status -c yashandb

##启动数据库
yasboot cluster start -c yashandb -m nomount
yasboot cluster start -c yashandb -m mount
yasboot cluster start -c yashandb
数据库启动的三个状态： nomount --> mount --> open
nomount 可通过 alter database mount; alter database open;的方式推进启动进度。

##.关闭数据库
yasboot cluster stop -c yashandb

##重启数据库
yasboot cluster restart -c yashandb

-- 表空间大小查询
select id,
       dt.tablespace_name,
       max_size / 1024 / 1024 max_size_mb,
       total_bytes / 1024 / 1024 total_size_mb,
       ts_used_size_mb,
       status,
       contents,
       logging,
       allocation_type,
       block_size,
       segment_space_management,
       encrypted
  from dba_tablespaces dt
  left join (select tablespace_name,
                    sum(bytes) / 1024 / 1024 ts_used_size_mb
               from dba_segments d
              group by d.tablespace_name) eg
    on dt.tablespace_name = eg.tablespace_name;

-- 临时表空间信息
SELECT FILE_ID,
       FILE_NAME,
       STATUS,
       BYTES / 1024 / 1024 SIZE_MB,
       AUTOEXTENSIBLE,
       TABLESPACE_NAME,
       MAXBYTES / 1024 / 1024 MAXSIZE_MB,
       INCREMENT_BY
  FROM DBA_TEMP_FILES;

-- 日志文件信息
select thread#,
       name,
       block_size,
       block_count,
       used_blocks,
       sequence#,
       status
  from v$logfile;

-- 用户信息
select username,
       user_id,
       password,
       account_status,
       lock_date,
       expiry_date,
       default_tablespace,
       created,
       authentication_type,
       last_login,
       password_change_date,
       database_maintained,
       profile
  from dba_users;

 -- 密码过期可通过加密密文修改：
alter user xx identified by values "S:39435DAFBF9608EF2430B7AFD1169B7A949D96D9397C2070F39DAB47D70FCB126A1BC1E5A63BD60F8A70" default tablespace users;

-- 所有用户角色
select grantee,
       granted_role privilege,
       'role_privs' privilege_type,
       case admin_option
         when 'y' then
          'yes'
         else
          'no'
       end admin_option
  from dba_role_privs
union
select grantee, privilege, 'sys_privs' privilege_type, admin_option
  from dba_sys_privs
union
select grantee,
       privilege || ' on ' || owner || '.' || table_name privilege,
       'table_privs' privilege_type,
       grantable
  from dba_tab_privs t
 where t.grantee in
       (select username
          from all_users a
         where a.username not in ('sys', 'sysdba', 'syssso', 'sysauditor'))
 order by grantee, privilege_type, privilege;
 
-- 查看参数
select * from v$parameter;
show parameter xx;

-- 统计对象情况
select d.owner, d.object_type, count(*) cnt
  from dba_objects d
 where d.owner not in ('sys', 'sysdba', 'syssso', 'ctisys', 'sysauditor')
 group by d.owner, d.object_type;

-- 查看推荐参数
exec DBMS_PARAM.OPTIMIZE();
select dbms_param.show_recommend() as recommend_settings from dual;

-- 查看归档情况
select database_id, database_name, log_mode, block_size, restore_time from v$database;

-- 查看每小时归档情况
select left(first_time, 10) day,
        sum(decode(substr(first_time, 12, 2), '00', 1, 0)) h00,
        sum(decode(substr(first_time, 12, 2), '01', 1, 0)) h01,
        sum(decode(substr(first_time, 12, 2), '02', 1, 0)) h02,
        sum(decode(substr(first_time, 12, 2), '03', 1, 0)) h03,
        sum(decode(substr(first_time, 12, 2), '04', 1, 0)) h04,
        sum(decode(substr(first_time, 12, 2), '05', 1, 0)) h05,
        sum(decode(substr(first_time, 12, 2), '06', 1, 0)) h06,
        sum(decode(substr(first_time, 12, 2), '07', 1, 0)) h07,
        sum(decode(substr(first_time, 12, 2), '08', 1, 0)) h08,
        sum(decode(substr(first_time, 12, 2), '09', 1, 0)) h09,
        sum(decode(substr(first_time, 12, 2), '10', 1, 0)) h10,
        sum(decode(substr(first_time, 12, 2), '11', 1, 0)) h11,
        sum(decode(substr(first_time, 12, 2), '12', 1, 0)) h12,
        sum(decode(substr(first_time, 12, 2), '13', 1, 0)) h13,
        sum(decode(substr(first_time, 12, 2), '14', 1, 0)) h14,
        sum(decode(substr(first_time, 12, 2), '15', 1, 0)) h15,
        sum(decode(substr(first_time, 12, 2), '16', 1, 0)) h16,
        sum(decode(substr(first_time, 12, 2), '17', 1, 0)) h17,
        sum(decode(substr(first_time, 12, 2), '18', 1, 0)) h18,
        sum(decode(substr(first_time, 12, 2), '19', 1, 0)) h19,
        sum(decode(substr(first_time, 12, 2), '20', 1, 0)) h20,
        sum(decode(substr(first_time, 12, 2), '21', 1, 0)) h21,
        sum(decode(substr(first_time, 12, 2), '22', 1, 0)) h22,
        sum(decode(substr(first_time, 12, 2), '23', 1, 0)) h23,
        count(*) total
from  v$archived_log
where first_time>=(sysdate-7)
group by left(first_time, 10)
order by left(first_time, 10) desc;
 
-- 会话情况
select count(*) cnt,
       a.ip_address,
               a.cli_program,
       a.cli_hostname,
       a.cli_osuser,
               a.username,
               a.status
from   v$session a
group  by a.ip_address,
               a.cli_program,
       a.cli_hostname,
       a.cli_osuser,
               a.username,
               a.status
order  by count(*) desc;

-- 查看错误日志
select * from (select incident_id, session_id, error_number, error_argument, error_comments from v$diag_incident) where rownum<=100;

-- 查看awr信息
select dbid, snap_interval, retention, most_recent_snap_id, most_recent_snap_time, status_flag from sys.wrm$_wr_control;

-- 查看慢sql
 select *
  from (select sa.SQL_TEXT,
               sa.SQL_FULLTEXT,
               sa.EXECUTIONS "执行次数",
               round(sa.ELAPSED_TIME / 1000000, 2) "总执行时间",
               round(sa.ELAPSED_TIME / 1000000 / sa.EXECUTIONS, 2) "平均执行时间",
               sa.COMMAND_TYPE,
               sa.PARSING_USER_ID "用户ID",
               u.username "用户名",
               sa.HASH_VALUE
          from v$sqlarea sa
          left join all_users u
            on sa.PARSING_USER_ID = u.user_id
         where sa.EXECUTIONS > 0
         order by (sa.ELAPSED_TIME / sa.EXECUTIONS) desc)
 where rownum <= 5;

-- 查看事务隔离级别
select * from v$transaction;

-- 等待事件
select * from (select  * from v$system_event order by total_waits desc) where rownum<=20;

-- 查看TX锁对象（被阻塞的会话）
select inst_id, sid, serial#, username, sql_id, lockwait, wait_event, ip_address from gv$session where wait_event is not null;
select sql_id, sql_text from gv$sqltext where sql_id = '';

 -- 查看锁源
select * from v$lock; --拿取sid
select sql_text  from "V_$SQLTEXT" a join "V_$SESSION" b on a.HASH_VALUE  = b.SQL_HASH_VALUE  AND b.sid = xx;

select l.lmode,
       o.owner,
       o.object_name,
       o.object_type,
       s.sid,
       s.serial#,
       s.sql_id,
       st.sql_text,
       p.THREAD_ID
  from v$locked_object l,
       dba_objects     o,
       v_$session      s,
       v$process       p,
       v$sqltext,
       v_$sqltext      st
 where l.object_id = o.object_id
   and l.session_id = s.sid
   and s.paddr = p.THREAD_ADDR
   and st.hash_value = s.sql_hash_value
 order by o.object_id;

-- 查看前5系统等待事件
select * from gv$session_wait where wait_event is not null;
select * from (select * from gv$system_event order by AVERAGE_WAIT_FG desc) where rownum <=5;
select * from (select * from gv$system_wait_class order by time_waited desc ) where rownum <= 5;

2.2 备份恢复

2.2.1 SQL命令备份恢复

##1. 数据库全备
mkdir -p /home/yashan/backup/
yasql / as sysdba
backup database full format '/home/yashan/backup/full_20211209191000' tag 'yashan_fullbak_20231129' parallelism 3;

##2. 数据库0级备份和1级备份
backup database incremental level 0 format '/home/yashan/backup/base_0_20231129';
backup database incremental level 1 format '/home/yashan/backup/incr_1_20231129';

##3. 数据库恢复
yasboot cluster stop -c yashandb
yasboot cluster start -c yashandb -m nomount
##注：恢复之前，要先清空数据目录
restore database from '/home/yashan/backup/base_0_20231129' parallelism 3;
recover database; --恢复到最新
--restore database until time to_date('2023-11-29 11:50:50','yyyy-mm-dd hh24:mi:ss');  --恢复到指定时间点
alter database open <resetlogs>;

2.2.2 yasrman备份恢复

##1. 创建catalog
yasrman sys/sys@127.0.0.1:1688 -c 'create catalog' -D /home/yashan/catalog
yasrman sys/sys@127.0.0.1:1688 -c 'show all' -D /home/yashan/catalog

## 2. 数据库全备
yasrman sys/yashan#2023@127.0.0.1:1688 -c "backup database full format '/home/yashan/backup/full_001' tag 'full_backup' parallelism 3" -D /home/yashan/catalog
##不指定存放路径的话，默认备份存放路径：$YASDB_DATA/backup

##3. 数据库0级备份和1级备份
## 0级备份
yasrman sys/yashan#2023@127.0.0.1:1688 -c "backup database incremental level 0 format '/home/yashan/backup/full_001' tag 'full_backup' parallelism 3" -D /home/yashan/catalog
yasrman sys/yashan#2023@127.0.0.1:1688 -c "backup database incremental level 1 format '/home/yashan/backup/full_001' tag 'full_backup' parallelism 3" -D /home/yashan/catalog
## 1级备份

##4. 查看备份集
yasrman sys/yashan#2023@127.0.0.1:1688 -c "list backup" -D /home/yashan/catalog

##4. 删除备份集
##(物理)
yasrman sys/yashan#2023@127.0.0.1:1688 -c "delete backupset tag 'full_backup1'" -D /home/yashan/catalog

编写了数据库备份恢复脚本，每周日全备1次，周一到周六增备1次，脚本内容如下：

cat /home/yashan/script/yashan_backup.sh

#!/bin/bash
#############################################
# Scipt is uesd to set backup level 0 policy.
# Author: Rae
# Date: 2023/11/29
# Version: 1.0
#############################################
# Set enviroment parameter
source ~/.bash_profile
export DATE=`date +%Y%m%d-%H%M%S`
export CURRENT_DATE=`date +%A`

BAK_PATH="/home/yashan/backup"
CATALOG_PATH="/home/yashan/catalog"
BAK_LOG="/home/yashan/backup/yashan_backup.log"
USERNAME="sys"
PASSWORD="yashan#2023"
IP="127.0.0.1"
PORT=1688
PARALLELISM=4

# Create necessary directory 
if [ ! -d ${BAK_PATH} ];then
 mkdir -p ${BAK_PATH}
fi
if [ ! -d ${CATALOG_PATH} ];then
 mkdir -p ${CATALOG_PATH}
 yasrman ${USERNAME}/${PASSWORD}@127.0.0.1:1688 -c 'create catalog' -D ${CATALOG_PATH}
 echo "`date +%Y%m%d-%H%M%S` | [Info] | Success create yashan catalog !" >> ${BAK_LOG}
fi

if [ ${CURRENT_DATE} == "Sunday" ];then
 echo "`date +%Y%m%d-%H%M%S` | [Info] | Begin backup databaseincremental level 0 !" >> ${BAK_LOG}
 yasrman ${USERNAME}/${PASSWORD}@${IP}:${PORT} -c "backup database incremental level 0 format '${BAK_PATH}/level0_${DATE}' tag 'level0_${DATE}'" -D ${CATALOG_PATH}
 echo "`date +%Y%m%d-%H%M%S` | [Info] | Success backup databaseincremental level 0 !" >> ${BAK_LOG}

else
 previous_sunday=`date -d "last Sunday" +%Y%m%d`
 result=`yasrman ${USERNAME}/${PASSWORD}@${IP}:${PORT} -c "list backup" -D ${CATALOG_PATH} | grep "tag" | grep "level0" | grep ${previous_sunday} | wc -l`
 if [[ ${result} == 1 ]];then
  echo "`date +%Y%m%d-%H%M%S` | [Info] | Begin backup databaseincremental level 1 !" >> ${BAK_LOG}
  yasrman ${USERNAME}/${PASSWORD}@${IP}:${PORT} -c "backup database incremental level 1 format '${BAK_PATH}/level0_${DATE}' tag 'level1_${DATE}'" -D ${CATALOG_PATH}
  echo "`date +%Y%m%d-%H%M%S` | [Info] | Success backup databaseincremental level 1 !" >> ${BAK_LOG}
 else
  echo "`date +%Y%m%d-%H%M%S` | [Info] | Begin backup databaseincremental level 0 !" >> ${BAK_LOG}
  yasrman ${USERNAME}/${PASSWORD}@${IP}:${PORT} -c "backup database incremental level 0 format '${BAK_PATH}/level0_${DATE}' tag 'level0_${DATE}'" -D ${CATALOG_PATH}
  echo "`date +%Y%m%d-%H%M%S` | [Info] | Success backup databaseincremental level 0 !" >> ${BAK_LOG}
 fi
fi

#配置定时任务
crontab -l
0 1 * * * /home/yashan/script/yashan_backup.sh

2.3 性能分析

2.3.1 AWR报告

select dbid, instance_number, snap_id, begin_interval_time from WRM$_SNAPSHOT;
set serveroutput on
exec dbms_awr.awr_report(dbid,instance_number,start_snap_id,stop_snap_id);

手工创建快照：exec dbms_awr.create_snapshot();

主要记录了数据库基本信息、数据库负载情况以及SQL执行情况。

2.3.2 性能视图

2.3.3 执行计划分析

方式1： explain select * from a, b where a.id = b.id;

方式2：alter session set statistic_level = all; set autotrace on; select *  from a, b where a.id = b.id;

2.3.4 统计信息

判断列统计信息准确性（最大值，最小值判断）：
select max(id), min(id) from t1;
select high_value, low_value from dba_tab_col_statistics where table_name = 'T1' and column_name = 'ID';

查看统计信息是否失效：
select owner, table_name, num_rows, avg_space, chain_cnt, sample_size, last_analyzed, global_stats, stale_stats from dba_tab_statistics where table_name = 'T1';

统计信息收集：
ANALYZE TABLE t1 PARTITION NULL INDEX_CASCADE true METHOD_OPTION 'FOR ALL COLUMNS' GRANULARITY 'AUTO' PARALLEL_DEGREE 1;

2.3.5 hint调优

2.3.5.1. 改变join的hint

2.3.5.2. 改变访问路径的hint

2.3.5.3 选择率的hint

   explain select * from t1, t2, t3 where t1.c1 = t2.c1 selectivity 0.0001 and t2.c1 = t3.c1;

2.3.6 绑定执行计划outline

3. 数据库升级

先说说总体体验：

升级比较简单，但是步骤还是稍显冗杂。建议将部分步骤整合成自动化脚本，缩减步骤。

升级前置检查，建议可以开发precheck脚本，评估当前系统满足升级需求。

建议增加预升级功能，把升级需要跑通的步骤check一遍，提高升级成功率。

yasboot cluster upgrade --cluster yashandb
yasboot cluster rollback -c yashandb -d yashandb

4. 数据库迁移

暂时没有时间测试了，有空测试了，再更新~

5. 使用总结

YashanDB的总体体验还是不错的，运维学习成本较低，具备Oracle运维经验的工程师可以很快速的上手。功能上虽然距离Oracle还有一定距离，但是相信国产数据库YashanDB会越做越好。

暂时先写到这里了，相信这份文档能给你一些收获。

yashandb yashandb体验官

最后修改时间：2023-12-03 12:16:55

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「YashanDB个人版体验」以DBA角度深度体验YashanDB

「YashanDB个人版体验」以DBA角度深度体验YashanDB

1. 数据库安装

1.1 命令行安装

1.1.1 操作系统环境配置

1.1.2 数据库安装

1.2 可视化安装

1.2.1 操作系统环境配置

1.2.1 数据库安装

2. 数据库维护

2.1 日常维护

2.2 备份恢复

2.2.1 SQL命令备份恢复

2.2.2 yasrman备份恢复

2.3 性能分析

2.3.1 AWR报告

2.3.2 性能视图

2.3.3 执行计划分析

2.3.4 统计信息

2.3.5 hint调优

2.3.5.1. 改变join的hint

2.3.5.2. 改变访问路径的hint

2.3.5.3 选择率的hint

2.3.6 绑定执行计划outline

3. 数据库升级

4. 数据库迁移

5. 使用总结

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