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Oracle ZFS Storage Appliance: Performance Issue during Dedupv1 to Dedupv2 Migration after upgrade to OS8.7 (Doc ID 2306637.1)

Last updated on OCTOBER 25, 2017

Applies to:

Sun ZFS Storage 7120 - Version All Versions and later
Oracle ZFS Storage ZS5-2 - Version All Versions and later
Oracle ZFS Storage Appliance Racked System ZS5-2 - Version All Versions and later
Oracle ZFS Storage ZS4-4 - Version All Versions and later
Oracle ZFS Storage Appliance Racked System ZS4-4 - Version All Versions and later
7000 Appliance OS (Fishworks)

Symptoms

Issue after upgrade from 2013.06.05.4.2,1-1.1 (2103.1.4.2)  to  2013.06.05.7.4,1-1.1 (OS 8.7.4).

NOTE:  This issue can occur after deferred updates are applied to a system using dedup (version 1) after an upgrade to OS 8.7.x

 

No data access from the Exadata system to the ZFS Storage.

Customer rebooted the head. The head took approx 4 hours to rejoin the cluster.

Deduplication was enabled on pool 'pool-0'.

Note: The deduplication algorithms have been changed in the OS 8.7.x Release ("deduplication version 2")

[ 2013.1.6.x and below used "deduplication version 1" ]

 

Pool status :

 

Changes

Application of optional deferred updates following upgrade to Oracle ZFS Storage Appliance Release OS 8.7.x

 

Cause

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