Step by Step Create ACFS File System Using RAC Commands

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ACFS Oracle ASM Cluster File System is cluster file system service used for High availability services.
Example – For achieving high availability in goldenate for Oracle RAC, we can use ACFS for goldengate relate files.
In this article, we will show how to create a ACFS file system in oracle RAC using command line.

ENVIRONMENT DETAILS

ORACLE GRID VERSION – 12.1.0.2
NODES – NODE3 , NODE4
OS – Linux OEL

1.Create an ASM DISKGROUP( ON NODE 3)

echo $ORACLE_HOME
/crsapp/app/oracle/product/grid12c

echo $ORACLE_SID
+ASM1

sqlplus / as sysasm

SQL> CREATE DISKGROUP ACFSPOC EXTERNAL REDUNDANCY
D
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Upgrade RAC Grid and Database from 11g To 12c

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Main steps:
Grid: –
1. Check all services are up and running from 11gR2 GRID_HOME
2. Perform backup of OCR, voting disk and Database.
3. Create new directory for installing 12C software on both RAC nodes.
4. Run “runcluvfy.sh” to verify errors.
5. Install and upgrade GRID from 11gR2 to 12cR1
6. Verify upgrade version
Database: –
1. Backup the database before the upgrade
2. Database upgrade Pre-check
Creating Stage for 12c database software
Creating directory for 12c oracle home
Check the pre upgrade status.
3.Unzip 12c database software in stage
4Install the 12.1.0.2 using the … Read more

How To Downgrade Oracle 19c Grid To 12c Grid

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In the pervious article we have explained the Upgrade Grid Infrastructure 12c To 19c Oracle Now We will explain the steps for downgrade oracle 19c 2 node GRID to oracle 12.1.0.2 GRID.

ENVIRONMENT DETAILS:
2 NODES – localhost1 and localhost2
Grid owner – oracle
19C ORACLE_HOME(current) – > /sharearea/crs/grid19c
12C ORACLE_HOME (old) -> /crs/app/oracle/product/grid12c

1. Check the current grid version:( check on both the nodes)

oracle@localhost1:/$ crsctl query crs softwareversion
Oracle Clusterware version on node [dbhost1] is [19.0.0.0.0]
oracle@localhost1:$ crsctl 
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Upgrade Grid Infrastructure 12c To 19c Oracle

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The latest oracle version is oracle 19C . In the below article we will explain the steps for upgrading grid infrastructure to 19c from oracle 12c . The upgrade will be done in rolling mode.

Current configuration – >

No of nodes – 2 node
current version – 12.1.0.2
os platform – Linux
grid owner – oracle

Check software version :
oracle@node1~$ crsctl query crs activeversion
Oracle Clusterware active version on the cluster is [12.1.0.2.0]

oracle@node2~$ crsctl query crs softwareversion
Oracle Clusterware version on node node1 is [12.1.0.2.0]

2. Download the software and unzip on your first Read more