My Oracle Support Banner

MiniCluster: Known issues and Best Practices for Upgrades and Factory Resets (Doc ID 2796645.1)

Last updated on AUGUST 15, 2021

Applies to:

Sun Microsystems > Operating Systems > Solaris Operating System
Oracle MiniCluster Specific Software
MiniCluster S7-2 Hardware
Oracle Solaris on SPARC (64-bit)

Purpose

 Upgrades and Factory Resets can fail in several ways. This KA note attempts to document the known issues and provide best practice suggestions for these tasks, and is intended to be consumed prior to beginning a reset or upgrade.

Scope

Customers frequently ask how to upgrade their systems from one release to another, and usually they are going from some very old release to the latest. Particularly there have been a number of problems customer's run into when upgrading from MC versions earlier than 1.3.0. In such cases performing an upgrade may take a number of hours and several 'upgrade' hops, and performing a factory reset may be the fastest option.

Some of the problem areas experienced are: 

o. DNS or NTP lookup issues
o. Incorrect host name to IP address mappings
o. Incorrect process followed, e.g. upgrading things manually rather than allowing MCMU to do the job
o. State of the system prior to the operation being performed, e.g. hardware or full file system issues
o. ASM free space for DB and RAC upgrades
o. Too many files in DB and / or RAC GRID homes
o. Unexpected local user customizations in any solaris host within the system: e.g. control domains, application and database VM's, or the kernel zone HA/NFS/ACFS Grid.
o. System critical user account passwords expired, forgotten, out of sync with MCMU and/or changed manually outside of MCMU CLI or BUI interfaces 

Ref: What Can or Cannot Be Changed On Oracle MiniCluster S7-2 Doc ID 2246837.1
Ref: Understanding, Changing and Resetting Passwords in MiniCluster Doc ID 2337258.1

Reset Vs. Upgrade

When doing an upgrade that requires several hops to get to the desired software versions, time and experience have shown that in most cases Factory Reset is the fastest and least error-prone way to get from any release to the desired release in a single hop. As far as documentation goes, customers who have done factory resets have done so by following the MCMU Factory Reset documentation and the desired MCMU version specific release notes, which we update for each release as required.

Note on MiniCluster Kernel Zone Grid

The MiniCluster Kernel Zone HA/NFS/ACFS/ASM Grid is a High Availability ASM/ACFS file system instance that provides shared storage to the rest of the node of the cluster, including global zones and application and database nodes. The shares are sourced out of a two node cluster based on Solaris Kernel Zone implementation. All of the shares and cluster resources are managed by Oracle Cluster CRS and sourced out of an Oracle Cluster ASM instance in the Kernal Zone Grid. Each MiniCluster node has one Kernel zone that is part of this cluster which will be called 'acfskz' in the 'zoneadm list' output.

For more details on the architecture of the MiniCluster S7-2 please refer to the system documentation found on docs.oracle.com.

Ref:

Details

To view full details, sign in with your My Oracle Support account.

Don't have a My Oracle Support account? Click to get started!


My Oracle Support provides customers with access to over a million knowledge articles and a vibrant support community of peers and Oracle experts.