<div dir="ltr"><div>Iain,<br><br></div>if you don't want glusterfs to migrate your data, there's always an option --force for remove-brick, which will remove brick without data migration. So, you will be able to backup/transfer/move data yourself, before reformatting to zfs. I'm actually prefer to migrate data myself, since glusterfs does not have much control over the migration process (only status command is available).<br><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Jan 16, 2015 at 12:59 PM, Iain Milne <span dir="ltr"><<a href="mailto:glusterfs@noognet.org" target="_blank">glusterfs@noognet.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">We're using 3.6 with three servers; one brick each in a (100TB+)<br>
distributed volume. They all use XFS.<br>
<br>
We'd like to move to ZFS, without user interruption.<br>
<br>
Is it as simple (with 3.6) as issuing the remove-brick command for the<br>
first server, waiting for its data to migrate to the other two<br>
(automatically?), reformatting as ZFS, then adding the brick again. Rinse<br>
and repeat for the other two servers?<br>
<br>
Any two servers currently have enough capacity to hold the data from all<br>
three.<br>
<br>
I've struggled to find much documentation on this, except for the<br>
following snippet which came from<br>
<a href="https://github.com/gluster/glusterfs/blob/release-3.6/doc/release-notes/3.6.0.md" target="_blank">https://github.com/gluster/glusterfs/blob/release-3.6/doc/release-notes/3.6.0.md</a><br>
<br>
"Prior to 3.6, volume remove-brick <volname> CLI would remove the brick<br>
from the volume without performing any data migration. Now the default<br>
behavior has been changed to perform data migration when this command is<br>
issued."<br>
<br>
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</blockquote></div><br></div></div>