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这篇文章主要介绍DM7如何搭建数据守护，文中介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们一定要看完！
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数据守护(DG)
环境说明
下列机器事先都安装了DM软件，安装路径为/dm7,执行程序保存在/dm7/bin目录中，数据存放路径为/dm7/data
机器名 IP地址 初始状态 操作系统 19c1 10.13.13.141(对外) 主库 dm1 redhat 6.7 10.10.10.141(mal对内) 19c2 10.13.13.142(对外) 10.10.10.142(mal对内) 备库 dm2 redhat 6.7 ora19c 10.13.13.140 确认监视器 redhat 6.7 实例名 port_num dw_port mal_host mal_port mal_dw_port dm1 5236 5239 10.10.10.141 5237 5238 dm2 5236 5239 10.10.10.142 5237 5238
数据准备
在主库机器上初始化数据库到目录/dm7/data:
[dmdba@19c1 bin]$ ./dminit path=/dm7/data db_name=DAMENG instance_name=DM1 port_num=5236 page_size=8 charset=0 initdb V7.1.6.46-Build(2018.02.08-89107)ENT db version: 0x7000a file dm.key not found, use default license! License will expire in 14 day(s) on 2020-06-17 log file path: /dm7/data/DAMENG/DAMENG01.log log file path: /dm7/data/DAMENG/DAMENG02.log write to dir [/dm7/data/DAMENG]. create dm database success. 2020-06-03 02:55:43
注册服务用于启动数据库
[root@19c1 root]# ./dm_service_installer.sh -i /dm7/data/DAMENG/dm.ini -p DM1 -t dmserver ln -s '/usr/lib/systemd/system/DmServiceDM1.service' '/etc/systemd/system/multi-user.target.wants/DmServiceDM1.service' Finished to create the service (DmServiceDM1)
正常启动数据库并正常关闭
[root@19c1 root]# service DmServiceDM1 start Redirecting to /bin/systemctl start DmServiceDM1.service [root@19c1 root]# ps -ef | grep dmserver dmdba 21312 1 14 02:59 ? 00:00:03 /dm7/bin/dmserver /dm7/data/DAMENG/dm.ini -noconsole root 21536 18668 0 03:00 pts/2 00:00:00 grep --color=auto dmserver [dmdba@19c1 bin]$ ./disql SYSDBA/SYSDBA Server[LOCALHOST:5236]:mode is normal, state is open login used time: 5.903(ms) disql V7.1.6.46-Build(2018.02.08-89107)ENT Connected to: DM 7.1.6.46 SQL> exit [root@19c1 root]# service DmServiceDM1 stop Redirecting to /bin/systemctl stop DmServiceDM1.service
ARCH_INI=1(打开归档)
MAL_INI=1(打开MAL配置)
DW_PORT=5239 (DW端口)
配置dmmal.ini文件
配置MAL系统，各主备库的dmmal.ini配置必须完全一致，MAL_HOST使用内部网络IP，MAL_PORT与dm.ini中PORT_NUM使用不同的端口值，MAL_DW_PORT是各实例对应的守护进程之间，以及守护进程和监视器之间的通信端口，配置如下：
[dmdba@19c1 DAMENG]$ vi dmmal.ini MAL_CHECK_INTERVAL = 5 MAL_CONN_FAIL_INTERVAL = 5 [MAL_INST1] MAL_INST_NAME = DM1 MAL_HOST = 10.10.10.141 MAL_PORT = 5237 MAL_INST_HOST = 10.13.13.141 MAL_INST_PORT = 5236 MAL_DW_PORT = 5238 [MAL_INST2] MAL_INST_NAME = DM2 MAL_HOST = 10.10.10.142 MAL_PORT = 5237 MAL_INST_HOST = 10.13.13.142 MAL_INST_PORT = 5236 MAL_DW_PORT = 5238
配置dmarch.ini
修改dmarch.ini，配置本地归档和实时归档。除了本地归档外，其他归档配置项中的ARCH_DEST表示实例是Primary模式时，需要同步归档数据的目标实例名。当前实例DM1是主库，需要向DM2（实时备库）同步数据，因此实时归档的ARCH_DEST配置为DM2。
[dmdba@19c1 DAMENG]$ vi dmarch.ini [ARCHIVE_REALTIME] ARCH_TYPE = REALTIME ARCH_DEST = DM2 [ARCHIVE_LOCAL1] ARCH_TYPE = LOCAL ARCH_DEST = /dm7/data/DAMENG/arch ARCH_FILE_SIZE = 128 ARCH_SPACE_LIMIT = 0
配置dmwatcher.ini
修改dmwatcher.ini配置守护进程，配置为全局守护类型，使用自动切换模式。
[dmdba@19c1 DAMENG]$ vi dmwatcher.ini [GRP1] DW_TYPE = GLOBAL DW_MODE = AUTO DW_ERROR_TIME = 10 INST_RECOVER_TIME = 60 INST_ERROR_TIME = 10 INST_OGUID = 453331 INST_INI = /dm7/data/DAMENG/dm.ini INST_AUTO_RESTART = 1 INST_STARTUP_CMD = /dm7/bin/dmserver RLOG_SEND_THRESHOLD = 0 RLOG_APPLY_THRESHOLD = 0
配置dmwatcher.ctl
同一个守护进程组，必须使用同一份dmwatcher.ctl。因此，只需要使用dmctlcvt工具生成一份dmwatcher.ctl文件，然后分别拷贝到各个数据库目录下即可。在配置完成dmwatcher.ini后，使用dmctlcvt工具生成dmwatcher.ctl：(特别注意，DEST目录为DAMENG的上一级目录，否则不生成控制文件)
[dmdba@19c1 bin]$ ./dmctlcvt TYPE=3 SRC=/dm7/data/DAMENG/dmwatcher.ini DEST=/dm7/data DMCTLCVT V7.1.6.46-Build(2018.02.08-89107)ENT convert txt to ctl success!
会在/dm7/data目录中生成一个GRP1目录，在GRP1目录中生成了dmwatcher.ctl控制文件
[root@19c1 data]# ls -lrt total 4 drwxr-xr-x 8 dmdba dinstall 4096 Jun 3 03:44 DAMENG drwxr-xr-x 2 dmdba dinstall 26 Jun 3 03:53 GRP1 [root@19c1 data]# cd GRP1 [root@19c1 GRP1]# ls -lrt total 4 -rw-r--r-- 1 dmdba dinstall 512 Jun 3 03:53 dmwatcher.ctl
拷贝生成的dmwatcher.ctl文件到数据文件目录/dm7/data/DAMENG。
将主库相关文件传输到备机:
[dmdba@19c1 dm7]$ scp -r data/ dmdba@10.13.13.142:/dm7/ The authenticity of host '10.13.13.142 (10.13.13.142)' can't be established. ECDSA key fingerprint is 7f:1f:9a:0f:8b:d1:e0:17:32:08:12:73:d8:1d:9c:da. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added '10.13.13.142' (ECDSA) to the list of known hosts. dmdba@10.13.13.142's password: dminit20200603025444.log 100% 783 0.8KB/s 00:00 sqllog.ini 100% 479 0.5KB/s 00:00 dm.ctl 100% 5120 5.0KB/s 00:00 DAMENG01.log 100% 256MB 256.0MB/s 00:01 DAMENG02.log 100% 256MB 128.0MB/s 00:02 dm_20200603025543_320471.ctl 100% 5120 5.0KB/s 00:00 dm_20200603030017_373808.ctl 100% 5120 5.0KB/s 00:00 SYSTEM.DBF 100% 21MB 21.0MB/s 00:01 dm_service.prikey 100% 633 0.6KB/s 00:00 MAIN.DBF 100% 128MB 128.0MB/s 00:01 ROLL.DBF 100% 128MB 128.0MB/s 00:01 dminst.sys 100% 220 0.2KB/s 00:00 TEMP.DBF 100% 10MB 10.0MB/s 00:00 rep_conflict.log 100% 12 0.0KB/s 00:00 dm.ini 100% 40KB 39.8KB/s 00:00 dmmal.ini 100% 558 0.5KB/s 00:00 dmarch.ini 100% 367 0.4KB/s 00:00 dmwatcher.ini 100% 615 0.6KB/s 00:00 dmwatcher.ctl 100% 512 0.5KB/s 00:00
备机修改相关配置
修改dm.ini INSTANCE_NAME = DM2
修改dmarch.ini
ARCH_DEST = DM1
其中dmwatcher.ini,dmmal.ini,dmwatcher.ctl和主库一致
二:启动到mount状态设置oguid
主库
[dmdba@19c1 bin]$ ./dmserver /dm7/data/DAMENG/dm.ini mount file dm.key not found, use default license! version info: develop Use normal os_malloc instead of HugeTLB Use normal os_malloc instead of HugeTLB DM Database Server x64 V7.1.6.46-Build(2018.02.08-89107)ENT startup... License will expire in 14 day(s) on 2020-06-17 ckpt lsn: 32981 SYSTEM IS READY. [dmdba@19c1 bin]$ ./disql SYSDBA/SYSDBA Server[LOCALHOST:5236]:mode is normal, state is mount login used time: 6.020(ms) disql V7.1.6.46-Build(2018.02.08-89107)ENT Connected to: DM 7.1.6.46 SQL> sp_set_oguid(453331); DMSQL executed successfully used time: 38.995(ms). Execute id is 1. SQL> exit
备库
[dmdba@19c2 bin]$ ./dmserver /dm7/data/DAMENG/dm.ini mount file dm.key not found, use default license! version info: develop Use normal os_malloc instead of HugeTLB Use normal os_malloc instead of HugeTLB DM Database Server x64 V7.1.6.46-Build(2018.02.08-89107)ENT startup... License will expire in 14 day(s) on 2020-06-17 ckpt lsn: 32981 SYSTEM IS READY. [dmdba@19c2 bin]$ ./disql SYSDBA/SYSDBA Server[LOCALHOST:5236]:mode is normal, state is mount login used time: 6.005(ms) disql V7.1.6.46-Build(2018.02.08-89107)ENT Connected to: DM 7.1.6.46 SQL> sp_set_oguid(453331); DMSQL executed successfully used time: 46.333(ms). Execute id is 1.
注册服务用于启动数据库
[root@19c2 root]# ./dm_service_installer.sh -i /dm7/data/DAMENG/dm.ini -p DM2 -t dmserver ln -s '/usr/lib/systemd/system/DmServiceDM2.service' '/etc/systemd/system/multi-user.target.wants/DmServiceDM2.service' Finished to create the service (DmServiceDM2)
三:打开数据库
主库以primary打开
SQL> alter database primary; executed successfully used time: 37.838(ms). Execute id is 0.
备库以standby 打开
SQL> alter database standby; executed successfully used time: 39.682(ms). Execute id is 0.
四:启动守护进程
启动各个主备库上的守护进程：
主库
[dmdba@19c1 bin]$ ./dmwatcher /dm7/data/DAMENG/dmwatcher.ini DMWATCHER[2.1] V7.1.6.46-Build(2018.02.08-89107)ENT DMWATCHER[2.1] IS READY
备库
[dmdba@19c2 bin]$ ./dmwatcher /dm7/data/DAMENG/dmwatcher.ini DMWATCHER[2.1] V7.1.6.46-Build(2018.02.08-89107)ENT DMWATCHER[2.1] IS READY 五:查看file_lsn与cur_lsn主备库是否一致 主库
SQL> select file_LSN, cur_LSN from v$rlog; LINEID FILE_LSN CUR_LSN ---------- -------------------- -------------------- 1 34412 34412 used time: 1.203(ms). Execute id is 6.
备库
SQL> select file_LSN, cur_LSN from v$rlog; LINEID FILE_LSN CUR_LSN ---------- -------------------- -------------------- 1 34412 34412 used time: 1.228(ms). Execute id is 3.
测试数据同步
主库：
SQL> create table t1(id int); executed successfully used time: 18.410(ms). Execute id is 7. SQL> insert into t1 values(1); affect rows 1 used time: 0.890(ms). Execute id is 8. SQL> commit; executed successfully used time: 6.026(ms). Execute id is 9. SQL> select file_LSN, cur_LSN from v$rlog; LINEID FILE_LSN CUR_LSN ---------- -------------------- -------------------- 1 34443 34443 used time: 0.340(ms). Execute id is 10.
备库:
SQL> select file_LSN, cur_LSN from v$rlog; LINEID FILE_LSN CUR_LSN ---------- -------------------- -------------------- 1 34443 34443 used time: 0.363(ms). Execute id is 4. SQL> select * from t1; LINEID ID ---------- ----------- 1 1 used time: 1.213(ms). Execute id is 5.
六:配置监视器(基本要求，安装dm7的软件)
由于主库和实时备库的守护进程配置为自动切换模式，因此这里选择配置确认监视器。和普通监视器相比，确认监视器除了相同的命令支持外，在主库发生故障时，能够自动通知实时备库接管为新的主库，具有自动故障处理的功能。
修改dmmonitor.ini配置确认监视器，其中MON_DW_IP中的IP和PORT和dmmal.ini中的MAL_HOST和MAL_DW_PORT配置项保持一致。
[dmdba@ora19c data]$ vi dmmonitor.ini MON_DW_CONFIRM = 1 MON_LOG_PATH = /dm7/data/log MON_LOG_INTERVAL = 60 MON_LOG_FILE_SIZE = 32 MON_LOG_SPACE_LIMIT = 0 [GRP1] MON_INST_OGUID = 453331 MON_DW_IP = 10.10.10.141:5238 MON_DW_IP = 10.10.10.142:5238
启动监视器：
[dmdba@ora19c bin]$ ./dmmonitor /dm7/data/dmmonitor.ini [monitor] 2020-06-03 09:18:20: DMMONITOR[2.1] V7.1.6.46-Build(2018.02.08-89107)ENT [monitor] 2020-06-03 09:18:20: DMMONITOR[2.1] IS READY. [monitor] 2020-06-03 09:18:20: Received message from(DM1) WTIME WSTATUS INST_OK INAME ISTATUS IMODE RSTAT N_OPEN FLSN CLSN SSLSN SLSN 2020-06-03 04:35:58 OPEN OK DM1 OPEN PRIMARY VALID 2 34443 34443 34443 34443 [monitor] 2020-06-03 09:18:20: Received message from(DM2) WTIME WSTATUS INST_OK INAME ISTATUS IMODE RSTAT N_OPEN FLSN CLSN SSLSN SLSN 2020-06-03 04:35:58 OPEN OK DM2 OPEN STANDBY VALID 2 34443 34443 34443 34443
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