Launching the Movement Wizard
Chapter 6 Managing the File System
Performing Stripe Group Movement
Although the Movement Wizard focuses primarily on data movement, you can also move metadata stripe groups. You can move a metadata stripe group to a new stripe group of the same or greater capacity as the original metadata stripe group. However, during metadata stripe group movement the file system must be down, and no new read/write operations can occur until all metadata has been transferred and the file system is restarted. The exact amount of downtime is based on the disk size.
Note: When moving a metadata stripe group, the Movement Wizard shuts down the file system. Depending on the number and size of files in your system configuration, metadata movement could take a long time, so plan accordingly.
After data movement is complete, you must mark the source stripe group as “down.”
For movement purposes, StorNext treats metadata and journal stripe groups the same way, so it doesn’t matter whether the stripe group you want to move is a metadata stripe group, a journal stripe group, or a combined metadata and journal stripe group. The only caveat is that stripe groups used for metadata/journal move cannot contain data. (StorNext has different mechanisms for moving data stripe groups versus metadata/journal stripe groups.)
Note: During Stripe Group Movement, affinities are preserved when files are moved from one stripe group to another. Consequently, there must be sufficient space on one or more destination stripe groups for any affinities on the source stripe group. (You must add any affinities from the source stripe group to the new stripe group.)
Use the following procedure to perform stripe group movement.
1From the SNFS home page, choose Move Stripe Group from the Admin menu. The Move Stripe Group screen appears, showing the following information for completed moves and moves in progress:
• File System: The name of the file system involved in the move
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