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ZFS Storage Appliance - Shadow Migration Target Share Consumes More Space Than Source (Doc ID 2703035.1)

Last updated on AUGUST 20, 2020

Applies to:

Sun ZFS Storage 7420 - Version All Versions to All Versions [Release All Releases]
Sun Storage 7410 Unified Storage System - Version All Versions to All Versions [Release All Releases]
Oracle ZFS Storage ZS7-2 High End - Version All Versions to All Versions [Release All Releases]
Oracle ZFS Storage ZS7-2 Mid-Range - Version All Versions to All Versions [Release All Releases]
Oracle ZFS Storage ZS5-2 - Version All Versions to All Versions [Release All Releases]
Information in this document applies to any platform.

Symptoms

 - Source share contains many small files and directories.

Issue with space consumption was seen when source files are roughly 1-2K in size. Testing done with larger files (>300MB but could vary) did not seem to be affected.

- No compression or encryption. Even if compression is enabled, you will see the same inflated share size.

- Block size, pool type, share characteristics does not matter.

- No errors are reported and Shadow Migration completes successfully.

 

:: Example ::

 

Changes

 Shadow Migration of a share that contains many small files and directories.

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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