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what's the best way to upgrade from WAS 8.5.5 to WAS 9

Matthew Clark (10711347) | asked Feb 12 '18, 2:19 p.m.

Currently running WebSphere
Looking to upgrade to WebSphere

As I understand it, it's a new install, plus migration, rather than fixpack upgrades such as to  Is this correct? Install WAS in a new folder location and migrate? How is this best accomplished?

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Donald Nong (14.5k614) | answered Feb 12 '18, 5:52 p.m.

Not sure whether it's "best" - you can just follow the WebSphere 9.0 migration guide. Similar discussion here:

Matthew Clark commented Feb 13 '18, 10:18 a.m.

Thank you Donald. Few more questions...

1) Is there a link somewhere that describes the improvements of WAS 9 over WAS 8.5.5?

2) I noticed when I installed WAS 9, with WAS 855 already existing on the system, it incremented the port number. For example, the new WAS admin console port is now 9044, rather than 9043. Is this port number editable, or is it automatically assigned?

3) If I decided not to run a migration, is my other option to setup WAS manually, import certificates, and install WAR files?

Naveen V commented Feb 13 '18, 3:46 p.m.

 I would suggest to create the profile in WAS 9.0 and then import certificate and install WAR. Use the same ports that you used for your application. That worked for me. 

Donald Nong commented Mar 12 '18, 10:35 p.m.

If you look at the highlights of the release note of WAS 9.0, you will see many new features. I won't consider them as improvements in terms of CLM deployments.

If you do a migration, the port number will be changed to be the same as the source profile. Otherwise, you can manually modify the port numbers to whatever you want - just keep port conflicts in mind.

If you completely disregard the old deployment, of course you will just treat the WAS 9 deployment as a new installation.

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