Re: cephfs (ceph-fuse) and file-layout: "operation not supported" in a client Ubuntu Trusty

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Hi,

Some news...

On 08/01/2016 12:42, Francois Lafont wrote:

> ~# mkdir /mnt/cephfs/ssd
> 
> ~# setfattr -n ceph.dir.layout.pool -v poolssd /mnt/cephfs/ssd/
> setfattr: /mnt/cephfs/ssd/: Operation not supported
> 
> ~# getfattr -n ceph.dir.layout /mnt/cephfs/
> /mnt/cephfs/: ceph.dir.layout: Operation not supported
> 
> Here is my fstab line which mount the cephfs:
> 
> id=cephfs,keyring=/etc/ceph/ceph.client.cephfs.keyring,client_mountpoint=/data1 /mnt/cephfs fuse.ceph noatime,defaults,_netdev 0 0

In fact, I have retried the same thing without the "noatime" mount
option and after that it worked. Then I have retried _with_ the "noatime"
to be sure and... it worked too. Now, it just works with or witout the
option.

So I have 2 possible explanations:

1. The fact to remove noatime and mount just once has unblocked
something...

2. or I have another explanation terrible for me. Maybe during
my first attempt, the cephfs was just not mounted in fact. Indeed,
now I have a doubt on this point because few minutes after the attempt
I have seen that the cephfs was not mounted (and I don't know why).

-- 
François Lafont
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