Sun Storage 7000 Unified Storage System: How to Apply Deferred Updates

Asset ID:	1-71-1333116.1
Update Date:	2018-04-04
Keywords:

Solution Type Technical Instruction Sure

Solution 1333116.1 : Sun Storage 7000 Unified Storage System: How to Apply Deferred Updates

Applies to:

Oracle ZFS Storage ZS3-2 - Version All Versions and later
Sun ZFS Storage 7420 - Version All Versions and later
Oracle ZFS Storage ZS3-4 - Version All Versions and later
Oracle ZFS Storage ZS3-BA - Version All Versions and later
Oracle ZFS Storage ZS4-4 - Version All Versions and later
7000 Appliance OS (Fishworks)

Goal

Purpose

Explanation of and procedures for applying deferred updates when upgrading the appliance.

Scope

Intended for customers and all those upgrading their appliance software version on the ZFS storage Appliance 7000 series.

To discuss this information further with Oracle experts and industry peers, we encourage you to review, join or start a discussion in the My Oracle Support Community - Disk Storage ZFS Storage Appliance Community

Solution

Sun Storage 7000 Unified Storage System: How to Apply Deferred Updates

From time to time a new version of the appliance kit may contain updates which will upgrade the version of your zpools in order to be able to offer new features.

When a zpool has been upgraded attempting to revert back to a previous version may result in undefined behaviour. To prevent this the zpool upgrade is not done by default during an upgrade of the appliance kit.

Instead you will be given an option to install this automatically during the upgrade, or at a later date. Hence these updates are known as a deferred updates.

Deferred updates are not always just zpool version upgrades, other parts of the software stack that may prove problematical to roll back from may be delivered in deferred updates.

NOTE: There is no impact to the running system (performance, or otherwise) when applying deferred updates.

A list of deferred updates delivered in appliance kit versions so far can be found here:

https://docs.oracle.com/cd/E79446_01/html/E79459/goxdn.html#scrolltoc

Apply via BUI

If you elect not to apply deferred updates during an upgrade this gives you an opportunity to make sure that the rest of the software is functional after the upgrade and to decide whether you then need to roll back or not.

You can apply the deferred updates at any time after the upgrade by simply going to the "maintenance -> system -> updates" view.

A list of the deferred updates available will be shown beneath the appliance kit version, each will have an "APPLY" button next to them, clicking this will apply all the available updates.

Apply via CLI

To see a list of available deferred updates use:

nas:> maintenance system updates show

If there are any they can then be applied with:

nas:> maintenance system updates apply

Cluster

In the case of a cluster deferred updates must be applied whilst both heads are operational.

However zpools will only be available to one head at a time so in the case where there are pools active on both heads you must check the list of available deferred updates on each head and apply the available list on each.

Replication

Replication may not work across deferred updates. After a deferred update has been applied it may not be possible to replicate to a system with an earlier replication stream format.

Reference:

Oracle ZFS Storage Appliance: Remote Replication Compatibility (Doc ID 1958039.1)

For further information on deferred updates see:

http://download.oracle.com/docs/cd/E22471_01/html/821-1792/maintenance__system__updates.html#maintenance__system__updates__deferred_updates

References

<NOTE:2051599.1> - Oracle ZFS Storage Appliance: ZFS Data Zpool Version Matrix
<NOTE:1958039.1> - Oracle ZFS Storage Appliance: Remote Replication Compatibility

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