[lustre-discuss] lustre file system mounted as (ro), is that right?

[Dilger, Andreas]

This is just the status of the local MDT mountpoint, which does not allow any local modification, only statfs (df) and such.

You need to mount a Lustre client to get a read-write mountpoint.

Cheers, Andreas

On Jun 28, 2016, at 12:59, Yu Chen <chenyu at umbc.edu<mailto:chenyu at umbc.edu>> wrote:

Hello,

I have finally installed lustre 2.8.0 following Christopher's suggestion (although it didn't compile on the latest kernel, 327.22). But it mounted as read-only (ro) on mds, is that right?
Here are the steps/info:

installed kernel:

kernel-devel-3.10.0-327.18.2.el7.x86_64

kernel-3.10.0-327.18.2.el7.x86_64

kernel-headers-3.10.0-327.18.2.el7.x86_64


  *   installed zfs-release, and edited zfs.repo to use kmod.
  *   yum clean metadata
  *   yum install zfs spl kmod-zfs kmod-spl kmod-zfs-devel kmod-spl-devel
  *   Then rpmbuild --rebuild --with zfs --without ldiskfs ./lustre...rpm
  *   Then installed all the lustre rpms
  *   loaded zfs spl lustre lnet modules
  *
  *   mkfs.lustre --reformat --fsname=lustre01 --mgs --mdt --backfstype=zfs --index=0 --mgsnode=10.1.12.1 at o2ib --servicenode=10.1.12.1 at o2ib mdt01-pool/mgsmdt01
  *   echo "mds1 - lustre01-MDT0000 zfs:mdt01-pool/mgsmdt01" > /etc/ldev.conf
  *   echo "options lnet networks=o2ib(ib0)" > /etc/modprobe.d/lustre.conf
  *   systemctl start lustre.service didn't work, had to use service lustre start
  *   then "mount" shows the following:

mdt01-pool/mgsmdt01 on /mnt/lustre/local/lustre01-MDT0000 type lustre (ro)


Is this right?


If I try to ls /mnt/lustre/local/lustre01-MDT000, it will say:

ls: cannot access /mnt/lustre/local/lustre01-MDT0000/: Not a directory


Thanks a lot for your time and help! First time doing lustre, a lot to learn.


Chen



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