Bill Sommerfeld wrote:
On Thu, 2006-11-16 at 16:08 -0800, Fred Zlotnick wrote:
I'm curious to hear of any migration success stories - or not - that
folks on this alias have experienced. You can send them to me and
I'll summarize to the alias.
I sent one to this list some months ago.
To recap, I used a variant of case 2: When I set up the original SVM+UFS
filesystem, I knew a zfs migration was coming so I held back sufficient
storage to permit me to create the first raidz group.
rsync worked nicely to copy the bits. once the move was complete, the
SVM+UFS filesystem was taken apart and the underlying disks added to the
pool.
It took a few months before usage levelled out between the first raidz
group and the ones added later.
I did a similar thing.
I originally had an SVM mirror, 6 disks in each side of the mirror with
a UFS file system on it.
I broke the mirror and created a 6 disk raidz out of that for the new
ZFS pool. After creating a ZFS file system for each of the old top
level directories (which represented users build areas) in the ZFS pool,
I used rsync to copy the data from the UFS filesystem to the new ZFS ones.
The users were warned that this was going to happen. When the first
rsync was done I used lockfs to write lock the original UFS file system
then ran rsync again to pickup the changes that happened during the
first pass.
I then remounted the original UFS file system read-only and left it that
way for a week while the users worked on their new ZFS file systems.
I then destroyed the original SVM+UFS config and added those 6 disks
into the ZFS pool as a second 6 disk raidz group.
--
Darren J Moffat
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