Shadow Migration, as Steve Tunstall explains in his blog post of that title, is a tool useful both for migrating data from any non-ZFSSA, NFS source or even from a different pool between controllers on the SAME clustered ZFSSA system. This is unlike the replication feature of ZFSSA, which can talk only to another 7000 system. Shadow Migration, on the other hand, can get data from both a local source (another share of the same system) or from any NFS mount from anywhere. While the migration is taking place, the original source turns read-only, and users start to mount and use your new share being created. If the data being requested by a user has not been migrated over yet, the ZFSSA will go get it, while continuing to migrate in the background.family member, Tunstall explains. He then outlines an eight-step process for performing a Local Shadow Migration, moving data from a share in one pool to another pool on the same system.

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7000 ZFS Storage Appliance: General Info and Websites

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