Oracle RAC node

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Hi Experts,

Is it ok to just reboot the Linux server where Oracle Clusterware service running?

Or is it best practice to bring down CRS before rebooting the server.

Cheers,
Salai

Responses

Hi Salai,

To stay on the safe side, it's good practice and recommended to close (shut down) all applications, processes and services
before restarting the operating system and this is generally the best way to avoid possible issues and problems later on. :)

Regards,
Christian

Hi Salai,

Christian gave you a good hint, but this is a question you should ask at an Oracle forum.

RAC is an Oracle product. Their Tech Net documentation and Forums are great resources for RAC.

It is not only what is common practice, but what is supported by Oracle.

Regards,

Jan Gerrit

Thanks, Christian

I actually posted in Oracle forum as well, just wanted to understand the system admins experiance as well.

While it's been a few years since I've touched a RAC, prior to that lapse, I installed a couple hundred RAC clusters for various customers across a number of OSes (Solaris, AIX, HP/UX and Linux).

In general, a properly-installed RAC cluster on fully-supported hardware is fairly resilient. While very much not recommended, technically you could walk up to a given node and yank its power out of the wall, plug it back in and re-start the node and everything should recover well. But, again, it's very much not recommended to do so. Even less so is it recommended to shut an entire cluster in this manner, let alone any given single node.

That said, a properly-built RAC node is designed to gracefully shut everything down when the hosting-OS is issued an administrative shutdown request. An OS-level administrative shutdown will result in the Oracle components on a given node receiving and acting on shutdown commands. These take care to ensure a proper clean-up and shut-down is performed.

Thanks Thomas,

If I want to perform a cleaner shutdown, Should I bring down RAC homes first and then CRS or directly hitting CRS is fine?

Cheers Salai

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