Quantum 3.5.1 User Manual
Chapter 6 Managing the File System
Performing Stripe Group Movement
StorNext User’s Guide
157
9
Click Next to complete the process.
10
After the status screen informs you that the expansion was completed
successfully, click Finish to exit the wizard.
Performing Stripe Group Movement
The time it takes to complete the Stripe Group Movement process
depends on the amount of data being moved between source and target
stripe groups. When moving a data stripe group, the file system
continues to run during the movement process. StorNext does not block
any new read/write requests, or block updates to existing files on the
source stripe group. All operations (including metadata operations) are
handled normally, but no new writes are allowed to the source stripe
group, which will be marked read-only.
Although the Movement Wizard focuses primarily on data 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.
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.
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.”