drbd sync SOW

A. Activity Overview 

1. drdb syncrinization

B. Prerequisite and Pre-checks:

Steps:
1. On servers BD902G and BD901G
pcs status

Server which is running oracle service ora_igt_rg  is Active. (Primary)
The other server is Passive (Secondary)

2. drbd General Note:
Data is written on Active server by oracle service, and synchronized by drbd to Standby server.
drbd has its own CLI, drbdadm

Command are run per LV Group (db2, db1, Ora_Exp, Ora_Online). Each Volume sync can take few minutes to complete.
drbdadm status during synchronization, will show progress, in percent.
drbdadm commands should be run as root.
drbdadm commads are run either on Active (Primary), or on Passive (Secondary) node, per context, see below.

3. Check status before starting synchronization
Run drbdadm status on Active server

Expected result:
connection:StandAlone – meaning there is no sync with the Secondary node

root>% drbdadm status
Ora_Exp role:Primary
  disk:UpToDate
  DBD902G connection:StandAlone
Ora_Online role:Primary
  disk:UpToDate
  DBD902G connection:StandAlone
db1 role:Primary
  disk:UpToDate
  DBD902G connection:StandAlone
db2 role:Primary
  disk:UpToDate
  DBD902G connection:StandAlone

4. Synchronization commands.
Yellow: commands on secondary site
Green: commands on primary site

drbdadm status
drbdadm status

drbdadm secondary Ora_Exp
drbdadm disconnect Ora_Exp
drbdadm -- --discard-my-data connect Ora_Exp
drbdadm connect Ora_Exp
drbdadm status
 
drbdadm secondary Ora_Online
drbdadm disconnect Ora_Online
drbdadm -- --discard-my-data connect Ora_Online
drbdadm connect Ora_Online
drbdadm status

drbdadm secondary db1
drbdadm disconnect db1
drbdadm -- --discard-my-data connect db1
drbdadm connect db1
drbdadm status

drbdadm secondary db2
drbdadm disconnect db2
drbdadm -- --discard-my-data connect db2
drbdadm connect db2
drbdadm status
 
drbdadm status
drbdadm status

1.After synchronization check status
Now, Primary node is aware of secondary node
Secondary node is aware on Primary node.
In this example:
DBD901G - is Primary
DBD902G - is Secondary


root@DBD901G:~>% drbdadm  status
Ora_Exp role:Primary
  disk:UpToDate
  SRV902G role:Secondary
    peer-disk:UpToDate

Ora_Online role:Primary
  disk:UpToDate
  SRV902G role:Secondary
    peer-disk:UpToDate

db1 role:Primary
  disk:UpToDate
  SRV902G role:Secondary
    peer-disk:UpToDate

db2 role:Primary
  disk:UpToDate
  SRV902G role:Secondary
    peer-disk:UpToDate


root@DBD902G:~>% drbdadm  status
Ora_Exp role:Secondary
  disk:UpToDate
  DBD901G role:Primary
    peer-disk:UpToDate

Ora_Online role:Secondary
  disk:UpToDate
  DBD901G role:Primary
    peer-disk:UpToDate

db1 role:Secondary
  disk:UpToDate
  DBD901G role:Primary
    peer-disk:UpToDate

db2 role:Secondary
  disk:UpToDate
  DBD901G role:Primary
    peer-disk:UpToDate

completed!!