[lustre-discuss] lustre-2.10.1 Data on MDT

[Ms. Megan Larko]

Hello List!

I have a very small test cluster with Lustre-2.10.1 on both client and
server.
I am testing Progressive File Layout and Data on MDT functions.

The backing file system on the Lustre targets is ZFS-0.7.6-1 and the OS is
CentOS 7.3.1611.  The storage was built from source on the cluster itself.

PFL functions as described in the lustre_manual.pdf  Chapter 19.5.
In attempting to test Data on MDT (DoM) which uses PFL, my "lfs setstripe"
command does not recognize the "-L mdt" flag.   It is not included in the
"man lfs-setstripe" for my 2.10.1 lustre and trying to use the command
example in the lustre_manual.pdf Chapter 20 2.1.1 example:
> lfs setstripe  -E 1M -L mdt -E -1 -S 4M -c -1 /mnt/L210/DoM_test
fails with "setstripe: invalid option -- 'L' ..." and prints the setstripe
help.

Sure enough "man lfs-setstripe" does not show the existence of the -L mdt
option described in the manual Chapter 20.

Has DoM landed yet?  If yes, in what lustre version?
If DoM is in lustre-2.10.1, is my syntax faulty?

P.S.  I am already looking at moving the test system to lustre-2.10.3
because of LU-9529/LU-9530 lfs migrate item.

Cheers,
megan
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