Need help regarding JIRA 8.5 Upgrade process

[Prasanna]

Hi Team,

We are planning to upgrade our JIRA instance. Please find below details.
JIRA SOFTWARE
Current version - 8.0
Upgrade version - 8.5.1 or 8.5.4
Running on - Linux(CentOS)
Upgrade method chosen - Manual(Recommended for linux) with a fallback option

As we have selected Manual process we would like to know how we can do this. We are checking below document for this.
https://confluence.atlassian.com/adminjiraserver085/upgrading-jira-manual-981154703.html

From the above document we found this
-----------------------------------
Extract the files
Extract the archive you've downloaded, and start the upgrade.

1. Extract (unzip) the files to a directory (this is your new installation directory, and must be different to your existing installation directory).
2. Point Jira to your existing Jira home directory.
-----------------------------------

Regarding above 2 points could you please answer below questions

1. We just have to extract the files to new installation directory ? no need to run any files after this(like steps performed in installer method) ?
2. What is the purpose of creating new installation directory ?
3. After creating new installation directory should we move all the files from old installation directory to new installation directory before extracting upgrade files ?

As we are doing POC upgrade, could you also provide any video sessions available on JIRA server upgrade.

Thank you in advance. 

Regards,
Prasanna

[Nic Brough -Adaptavist- · Accepted solution]

1. Yes
2. So the installation does not destroy the old one
3. No, that would destroy the new installtion

Please, just follow the instructions in the guide.  They are clear and perform an upgrade.  You'll mostly find videos are totally out of date and not particularly appropriate for your set up.

[Prasanna]

Hi Nic,

Thank you so much for your answers. These are very helpful.

Could you please confirm the below as well.

After extracting 8.5 tar file into new installation directory system will automatically recognizes as this is current installation directory ?

Thank you in advance.

Regards,

Prasanna

[Nic Brough -Adaptavist-]

No, you need to follow the installation instructions to tell it where the installation is.