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Oracle ZFS Storage Appliance: 'unknown' file names under the Analytics display output (Doc ID 2191897.1)

Last updated on JANUARY 05, 2018

Applies to:

Sun ZFS Storage 7420 - Version All Versions to All Versions [Release All Releases]
Oracle ZFS Storage ZS3-BA - Version All Versions to All Versions [Release All Releases]
Oracle ZFS Storage ZS3-4 - Version All Versions to All Versions [Release All Releases]
Sun ZFS Storage 7120 - Version All Versions to All Versions [Release All Releases]
Sun ZFS Storage 7320 - Version All Versions to All Versions [Release All Releases]
7000 Appliance OS (Fishworks)

Symptoms

Using analytics can really help to frame the ZFS appliance activity/performance . The focus can be toward shares and even each filename of the shares.
We can use, for example, the following analytic : NFSv3 operations per seconds broken down by filename.
Unfortunately, most of the activity may be reported against <unknown> file names.

 

The "Sun ZFS Storage 7000 Analytics Guide" tells this :

There are some circumstances where the filename is not known, such as after a cluster failover and when clients continue to operate on NFS filehandles without issuing an open to identify the filename.
In these situations the filename reported is "<unknown>".

Actually, this is not the only case.

Changes

This behavior has been present since the very first release of the ZFS Storage Appliance in 2008.

Cause

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