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Oracle Exam 1Z0-821 Topic 6 Question 26 Discussion

Actual exam question for Oracle's 1Z0-821 exam
Question #: 26
Topic #: 6
[All 1Z0-821 Questions]

You need to migrate a UFS file system named /production_ufs to a ZFS file system named /production_ufs. The /production_ufs file system cannot be taken down or be out of production during the migration, and the current /production_ufs file system must remain active until the /ptoduction_zfs file system is copied and ready.

Which method allows you to meet both requirements?

1. Copy live data from /production_ufs to /production_zfs while /production_ufs is in use.

2. When the copy is complete, /production_zfs will contain an up-to date copy of /production_ufs

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Suggested Answer: E

Migrating Data With ZFS Shadow Migration

ZFS shadow migration is a tool you can use to migrate data from an existing file system to a new file system. A shadow file system is created that pulls data from the original source as necessary.

You can use the shadow migration feature to migrate file systems as follows:

* A local or remote ZFS file system to a target ZFS file system

* A local or remote UFS file system to a target ZFS file system

Shadow migration is a process that pulls the data to be migrated:

* Create an empty ZFS file system.

* Set the shadow property on an empty ZFS file system, which is the target (or shadow) file system, to point to the file system to be migrated.

For example:

# zfs create -o shadow=nfs://system/export/home/ufsdata users/home/shadow2

* Data from file system to be migrated is copied over to the shadow file system.


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