preface

This article is about the deployment of DMDSC environment. I hope it can help you.
This deployment uses a hard disk for testing

1, DSC deployment preparation

1.1 installing database software

Referring to the stand-alone deployment, install the database software first, and there is no need to initialize and register services. And modify relevant system parameters. The directories of the two servers are consistent

1.2 raw device binding Division

The zones are as follows:

1) fdisk /dev/sdb
2) Input in sequence n –>p-> 1 ->enter-> +100M-> Press enter to complete the partition of the first disk
3) Input in sequence n –>p-> 2 ->enter-> +100M-> Partition disk, enter
4) Input in sequence n –>p-> 3 ->enter-> + 2048M -> Press enter to complete the partition of the third disk
5) Input in sequence n –>p-> 4 ->enter->enter->Press enter to complete the partition of the fourth disk
6) input w Save the configuration and exit

Edit / etc / udev / rules d/60-raw. rules

cd /etc/udev/rules.d/60-raw.rules
Vi 60-raw.rules
ACTION=="add", KERNEL=="sdb1", RUN+="/bin/raw /dev/raw/raw1 %N"
ACTION=="add", KERNEL=="sdb2", RUN+="/bin/raw /dev/raw/raw2 %N"  
ACTION=="add", KERNEL=="sdb3", RUN+="/bin/raw /dev/raw/raw3 %N" 
ACTION=="add", KERNEL=="sdb4", RUN+="/bin/raw /dev/raw/raw4 %N"
ACTION=="add", KERNEL=="raw[1-4]", OWNER="dmdba", GROUP="dinstall", MODE="660"

Execute the order to take effect

/sbin/udevadm control --reload
/sbin/udevadm trigger --type=devices --action=change

Execute the following command to check whether the configuration is successful

 ll /dev/raw/raw*

If the configured raw device cannot be viewed, the server needs to be restarted

2, Deploy DSC

2.1 editing dmdcr_cfg.ini file

Create a new config directory under the dmdbms directory to store DSC configuration files for easy management
The code is as follows (example):

vi dmdcr_cfg.ini
DCR_N_GRP = 3
DCR_VTD_PATH = /dev/raw/raw1      #Voting Disk path
DCR_OGUID = 63635
[GRP]
DCR_GRP_TYPE = CSS
DCR_GRP_NAME = GRP_CSS
DCR_GRP_N_EP = 2
DCR_GRP_DSKCHK_CNT = 60
[GRP_CSS]
DCR_EP_NAME = CSS0
DCR_EP_HOST = 192.168.3.212
DCR_EP_PORT = 9341
[GRP_CSS]
DCR_EP_NAME = CSS1
DCR_EP_HOST = 192.168.3.213
DCR_EP_PORT = 9343
[GRP]
DCR_GRP_TYPE = ASM
DCR_GRP_NAME = GRP_ASM
DCR_GRP_N_EP = 2
DCR_GRP_DSKCHK_CNT = 60
[GRP_ASM]
DCR_EP_NAME = ASM0
DCR_EP_SHM_KEY = 93360
DCR_EP_SHM_SIZE = 20
DCR_EP_HOST = 192.168.3.212
DCR_EP_PORT = 9349
DCR_EP_ASM_LOAD_PATH = /dev/raw
[GRP_ASM]
DCR_EP_NAME = ASM1
DCR_EP_SHM_KEY = 93361
DCR_EP_SHM_SIZE = 20
DCR_EP_HOST = 192.168.3.213
DCR_EP_PORT = 9351
DCR_EP_ASM_LOAD_PATH = /dev/raw
[GRP]
DCR_GRP_TYPE = DB
DCR_GRP_NAME = GRP_DSC
DCR_GRP_N_EP = 2
DCR_GRP_DSKCHK_CNT = 60
[GRP_DSC]
DCR_EP_NAME = DSC0
DCR_EP_SEQNO = 0
DCR_EP_PORT = 5136      #Instance port
DCR_CHECK_PORT = 9741
[GRP_DSC]
DCR_EP_NAME = DSC1
DCR_EP_SEQNO = 1
DCR_EP_PORT = 5136     #Instance port
DCR_CHECK_PORT = 9742

2.2 initialization using DMASMCMD tool

The installation path is executed under the bin directory
The code is as follows (example):

./dmasmcmd
create dcrdisk '/dev/raw/raw1' 'vote'
create votedisk '/dev/raw/raw2' 'dcr'
create asmdisk '/dev/raw/raw4' 'LOG0'
create asmdisk '/dev/raw/raw3' 'DATA0'
init dcrdisk '/dev/raw/raw2' from '/dm/cj/dmdbms/config/dmdcr_cfg.ini'identified by 'abcd'
init votedisk '/dev/raw/raw1' from '/dm/cj/dmdbms/config/dmdcr_cfg.ini'

2.3 edit dmasvrmal INI file

Edit dmasvrmal.config in the dmdbms/config directory ini
The code is as follows (example):

vi dmasvrmal.ini
[MAL_INST1]
 MAL_INST_NAME = ASM0
 MAL_HOST = 192.168.3.212
 MAL_PORT = 7236
[MAL_INST2]
 MAL_INST_NAME = ASM1
 MAL_HOST = 192.1668.3.213
 MAL_PORT = 7237

2.4 edit dmdcr INI file

Edit dmdcr.config in the dmdbms/config directory ini
The code is as follows (example):

vi  dmdcr.ini
DMDCR_PATH = /dev/raw/raw2
DMDCR_MAL_PATH =/dm/cj/dmdbms/config/dmasvrmal.ini #MAL profile path used by dmasmsvr
DMDCR_SEQNO = 0
#ASM restart parameter, start in command line mode
DMDCR_ASM_RESTART_INTERVAL = 15
DMDCR_ASM_STARTUP_CMD =/dm/cj/dmdbms/bin/dmasmsvr dcr_ini=/dm/cj/dmdbms/config/dmdcr.ini
#DB restart parameter, start in command line mode
DMDCR_DB_RESTART_INTERVAL = 35
DMDCR_DB_STARTUP_CMD =/dm/cj/dmdbms/bin/dmserver path=/dm/cj/dmdbms/config/dsc0_config/dm.ini dcr_ini=/dm/cj/dmdbms/config/dmdcr.ini

Note: copy the files of 2.1 – 2.4 to another node before execution

Put another node dmdcr.ini Document
DMDCR_DB_STARTUP_CMD =/dm/cj/dmdbms/bin/dmserver path=/dm/cj/dmdbms/config/dsc0_config/dm.ini dcr_ini=/dm/cj/dmdbms/config/dmdcr.ini
 Commands in dsc0_config Change to dsc1_config

2.5 start DMCSS and DMASM service procedures

Execute in the bin directory of the installation path, so all nodes execute (copy the files of 2.1 – 2.4 to all nodes before execution)
Manually start the dmcss command:

./dmcss DCR_INI=/dm/cj/dmdbms/config/dmdcr.ini

Manually start the dmasmsvr command: for example, when configuring dmdcr INI file, you do not need to execute this command manually

./dmasmsvr DCR_INI=/dm/cj/dmdbms/config/dmdcr.ini

Refer to the official documents for specific parameter descriptions:
https://eco.dameng.com/docs/zh-cn/pm/configuration-instructions.html

2.6 creating a DMASM disk group using the dmasmtool tool

Select a node and enter the installation bin directory:

./dmasmtool DCR_INI=/dm/cj/dmdbms/config/dmdcr.ini
 #Create log disk group
create diskgroup 'DMLOG' asmdisk '/dev/raw/raw4'
#Create data disk group
create diskgroup 'DMDATA' asmdisk '/dev/raw/raw3'

2.7 edit dminit INI file

Edit dminit.config in the dmdbms/config directory ini
The code is as follows (example):

db_name = dsc
system_path = +DMDATA/data
system = +DMDATA/data/dsc/system.dbf
system_size = 128
roll = +DMDATA/data/dsc/roll.dbf
roll_size = 128
main = +DMDATA/data/dsc/main.dbf
main_size = 128
ctl_path = +DMDATA/data/dsc/dm.ctl
ctl_size = 8
log_size = 256
dcr_path = /dev/raw/raw2 #dcr disk path, which currently does not support asm, can only be a bare device
dcr_seqno = 0
auto_overwrite = 1
[DSC0] #inst_ Dcname and DMR_ cfg. Ini DB type DCR in group_ EP_ Name correspondence
config_path = dm/cj/dmdbms/config/dsc0_config
port_num = 5136
mal_host = 192.168.3.212
mal_port = 9340
log_path = +DMLOG/log/dsc0_log01.log
log_path = +DMLOG/log/dsc0_log02.log
[DSC1] #inst_name and dmdcr_cfg.ini DB type DCR in group_ EP_ Name correspondence
config_path = dm/cj/dmdbms/config/dsc1_config
port_num = 5136
mal_host = 192.168.3.213
mal_port = 9341
log_path = +DMLOG/log/dsc1_log01.log
log_path = +DMLOG/log/dsc1_log02.log

2.8 initialize DB environment with dminit

Select a node to initialize
The code is as follows (example):

./dminit control=/dm/cj/dmdbms/config/dminit.ini

After initialization, there is dsc0 under config_ Config and dsc1_config folder, put dsc1_ Copy config to another node

2.9 start database service

Both nodes start the service
If dmdcr is configured If auto start is configured in the. INI file, there is no need to start the service manually and wait for DMCSS to automatically pull up the instance
Manual start:
1 node

./dmserver /dm/cj/dmdbms/config/dsc0_config/dm.ini dcr_ini=/dm/cj/dmdbms/config/dmdcr.ini

2 nodes

./dmserver /dm/cj/dmdbms/config/dsc1_config/dm.ini dcr_ini=/dm/cj/dmdbms/config/dmdcr.ini

2.10 configuration monitor file dmcssm ini

Edit dmcssm. In the installation directory bin ini

vi dmcssm.ini
#Dmdcr_ cfg. DCR in ini_ Oguid is consistent
CSSM_OGUID = 63635 
#Configure the connection information of all CSS,
#Dmdcr_ cfg. DCR of CSS configuration item in ini_ EP_ Host and DCR_ EP_ Consistent with port
CSSM_CSS_IP = 192.168.3.212:9341
CSSM_CSS_IP = 192.168.3.213:9343
CSSM_LOG_PATH =/dm/cj/dmdbms/log#Storage path of monitor log file
CSSM_LOG_FILE_SIZE = 32 #32M maximum per log file
CSSM_LOG_SPACE_LIMIT = 0 #Unlimited total log file space

2.11 start monitor

./dmcssm INI_PATH=/dm/chenji/dmdbms/bin/dmcssm.ini---

2.12 background startup of registration service

Both nodes need to register services
Code examples are as follows:

[root@dsc1 config]# /dm/dmdba/dmdbms/script/root/dm_service_installer.sh -t dmcss -p csscj1 -dcr_ini /dm/cj/dmdbms/config/dmdcr.ini 
Create service(DmCSSServicecss1)complete
[root@dsc1 config]# /dm/dmdba/dmdbms/script/root/dm_service_installer.sh -t dmasmsvr -p asmcj1 -dcr_ini /dm/cj/dmdbms/config/dmdcr.ini 
dmasmsvr(RAC)Service needs to set dependent service(dmcss)!
[root@dsc1 config]# /dm/dmdba/dmdbms/script/root/dm_service_installer.sh -t dmasmsvr -p asmcj1 -dcr_ini /dm/cj/dmdbms/config/dmdcr.ini -y DmCSSServicecsscj1
 Create service(DmASMSvrServiceasm1)complete
[root@dsc1 mapper]# /home/dmdba/dmdbms/script/root/dm_service_installer.sh -t dmserver -p DMCJ1 -dm_ini /dm/cj/dmdbms/config/dsc0_config/dm.ini -dcr_ini /dm/cj/dmdbms/config/dmdcr.ini -y DmASMSvrServiceasmcj1

Note: the service name is modified according to the actual registered

For more information, please visit the official website of Dameng database
https://eco.dameng.com