EBS migration to new linux servers

[satish]

Hi erman,

We have a very old hardware and now we puchased a new hardware for EBS environment.Our existing versions are as below

os RHEL 5

database 11.1.0.2

apps R12.1.3


Ram is very less in old servers,so we are planning to install same os RHEL 5 on new servers and then clone the existing application and database to new servers.

After the new servers are configured,Can we upgrade RHEL5 TO 7 and then upgrade db from 11gr1 to 11.2.0.4 or 12c?Is it supported


Thank you

Thank you

[ErmanArslansOracleBlog]

Your database version is very old.
It can't be 11.1.0.2.. It should be 11.1.0.7. (I think you have a typo there)
I would first upgrade my database if I were you.
11.1.0.7 is not supported or certified with RHEL 7.
So, in order to run your database in RHEL 7, first you need to upgrade it in-place, while it is running on RHEL 5.

[satish]

thank you for the update erman.yes you are right.its  a typo

erman,

servers are very slow and having less ram,so we cannot do the upgrade in existing servers.

This is our plan.

Install old version RHEL 5 in new server
clone the existing apps(R12.1.3) and db(11.1.0.7) to new server
Then start upgrading db to 12c in new server

But here is our concern
once db is upgraded to 12c on new server having os rhel 5,can we then upgrade rhel 5 to 7 in the same server in different downtime?

please need your suggestion

Thank you

[ErmanArslansOracleBlog]

Read this ->

https://access.redhat.com/solutions/21964

[satish]

Thanks for the update.

According to that,we cannot do inplace upgrades.But does that mean we have to install RHEL7 in new server?

[ErmanArslansOracleBlog]

There are things that can be done here. But these require deep knowledge about Linux administration + these will make the process even more complicated.
Also, Red Hat strongly recommends fresh installations when upgrading from one major version to another

In order to minimize the risk, yes.. Install RHEL7 on a new server.
The following opportunities are so risk, I don't recommend any of those!

1)In place upgrade with your own risk --VERY RISKY ( redhat strongly recommends not doing so + there are some products that can be affected from such an upgrade)
2)Get downtime, take your backups, Install RHEL7 on the current server, restore from backups --VERY RISKY. (your downtime may take long and long time)
3)Install RHEL 7 into the same server , to a different partition.. backup your things, get your downtime, shutdown RHEL5 , boot with RHEL 7, recreate your partitions & reformat your filesystems(if needed), restore your backup -- VERY RISKY, COMPLICATED.

So, unfortuneatly, the best way is to install RHEL7 into new server and do a EBS migration based on cloning..
Remember, your db should be upgraded first. It must support RHEL 7 before the migration.

[satish]

Thank you.This clarifies