# DCLI to back up Oracle home and inventory before patch

I was preparing for my weekend patch of our Exadata system and I needed to back up all of our Oracle homes and inventories on our production system.  On our 2 node dev and qa clusters I just ran the backups by hand like this:

login as root

cd /u01/app/oracle/product/11.2.0.4

tar -cvf - dbhome_1 | gzip > dbhome_1-20150211.tgz

cd /u01/app

cp -r oraInventory oraInventory.20150211


But the production cluster has 12 nodes so I had to figure out how to use DCLI to run the equivalent on all 12 nodes instead of doing them one at a time.  To run a DCLI command you need go to the directory that has the list of database server host names.  So, first you do this:

login as root

cd /opt/oracle.SupportTools/onecommand

The file dbs_group contains a list of the database server host names.

Next, I wanted to check how much space was free on the filesystem and how much space the Oracle home occupied so I ran these commands:

dcli -g dbs_group -l root "df|grep u01"

dcli -g dbs_group -l root "cd /u01/app/oracle/product/11.2.0.4;du -ks ."


The first command gave me how much space was free on the /u01 filesystem on all database nodes.   The second command gave me how much space the 11.2.0.4 home consumed.  I should have done “du -ks dbhome_1” since I’m backing up dbhome_1 instead of everything under 11.2.0.4, but there wasn’t much else under 11.2.0.4 so it worked out.

Now that I knew that there was enough space I ran the backup commands using DCLI.

dcli -g dbs_group -l root "cd /u01/app/oracle/product/11.2.0.4;tar -cvf - dbhome_1 | gzip > dbhome_1-20150316.tgz"

dcli -g dbs_group -l root "cd /u01/app;cp -r oraInventory oraInventory.20150316"


I keep forgetting how to do this so I thought I would post it.  I can refer back to this later and perhaps it will be helpful to others.

– Bobby