Solaris

Hi,

As in the solaris material i know that the patch is added through the command "patchadd <patch no.>".

But i need to know, what are all the steps we have to follow while applying a patch in a production server. My friend says that we have to detach mirror before applying patch and not telling me clearly about other steps.

Could any of you help me to find the steps to install patch in production server? Your answers will be helpful for people like me who are searching jobs in Solaris SA.

The recommended way to patch a live Solaris 10 production server is live upgrade:
BigAdmin Sun Docs: How To Use Solaris Live Upgrade to Install Patches

I don't patch a server real-time. I'm sure that there are multiple ways of doing this. Unfortunately, patching isn't 100% fool proof. I prefer this method over something like live upgrade because I have control over what I'm doing. A little CYA will pay off in the long run. I do something like this to patch a server when using SDS.
1) check hardware. reboot the server to ensure that it comes up cleanly
2) detach the mirror
3) remove the meta DB info from /etc/system
4) change the meta device info in /etc/vfstab to standard names and paths
5) boot off of the mirror to ensure the mirror is bootable
6) boot off the root disk
7) patch as needed
8) boot off the root disk
9) put meta DB and device info back into /etc/system and /etc/vfstab
10) boot off the metadevice
11) run server for a week
12) if all is good, re-establish root mirror

I don't get that. You have control over what you are doing with live upgrade too. Your method is also inducing a service interruption time which might be unacceptable on a production system. Patching can take several hours to complete and live upgrade allows to do it while the system is running normally.

As I said, "I" prefer this method. Sesha asked the question, I posted my method. It may be old school, but this is the method that "I" use. I'm not knocking Live Upgrade. I just don't use it. Yep, it requires down time. And, yes I work in an enterprise environment. One of the largest banks in the world. Again, I'm not knocking that you use Live Upgrade.

I don't question you choice, it is obviously up to you to choose the method you are more comfortable with. I was only commenting about the "control over what I'm doing point" which is questionable as Live Upgrade does provide at least the same level of control.

Thank you guys for sharing useful information with me. I have some more doubts and i will post my next doubt shortly. Please keep supporting me.