Hi Paul, that's is more a warning than an error. This advice helps you avoid situations like this:
-Lets assume you have a directory called /brick/brick1 in your root device
-Then you mount your brick on /bricks/brick1
-Everything is great, BUT if your drive (brick1 drive) eventually fails and doesn't mount you would be writing files on /brick/brick1 because the directory will exist anyway(eventhough the brick is not mounted), so you could end up with your root partition full of gluster files. A full root partition is a potencial big problem almost in any case.
Let me know if I wasn't clear enough.
Regards,
2014-09-12 2:44 GMT-03:00 Paul Guo <bigpaulguo@xxxxxxxxxxx>:
#gluster volume create g1 replica 2 lab1:/brick1 lab2:/brick1volume create: g1: failed: The brick lab1:/brick1 is a mount point. Please create a sub-directory under the mount point and use that as the brick directory. Or use 'force' at the end of the command if you want to override this behavior.
# df -h
......
/dev/sdb 8.0G 43M 8.0G 1% /brick1
I found a thread which talked about this:
http://gluster.org/pipermail/gluster-users.old/2013-May/013065.html
> The quick start guide needs to be updated. The brick directory should> ideally be a sub-directory of a mount point (and not a mount point> directory itself) for ease of administration. We recently added code to> warn about this (and looks like the code check exposed a documentation bug> which you just shared!)
I have no idea about how this affects administration in real cases.
For me, for example, if I want to cleanup the brick, I just umount & mkfs it
simply, but adding one more sub-directory will definitely add more cycles in kernel to
do lookup for each file access (Let's not consider dentry cache at first).
Thanks,Paul
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Pavlik Salles Juan José
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