On 10/17/18 1:20 PM, Kurt Strosahl wrote:
Good Afternoon,
I believe 2.10.* is the long time support.
I am happy with 2.10.5 on my standard performance cluster but for a
very high performance cluster I built 5 months ago where 6GB/s per each OSS
where required in read and write transfers I had some problem with file
locking using Lustre 2.10.3 when having many writers.
This issue did not show up with Lustre 2.11.0 so that I Went for it.
I'm in the early planning stages of a lustre upgrade. We are
going to be moving from 2.5 to either 2.10 or 2.11, possibly by
standing up a new lustre file system alongside the existing one and
migrating the data over. I'm wondering if anyone has had specific
experiences (either positive or negative) with either of these versions.
I was also looking for, but couldn't seem to find, a mapping of zfs
versions to lustre versions. Am I correct in my assumption that zfs
0.7.9 will work with either version?
Finally, does anyone have experience with zfs as the backing for the
MDS/MDT?
I have several MDS/MDT on ZFS and they are also virtual machines and I
never had issues with them.
anyway especially regarding the OSSes you may eventually need some ZFS
module parameters optimizations regarding vdev_write and vdev_read max
to increase those values higher than default. You may also disable ZIL,
change the redundant_metadata to "most" atime off.
I could send you a list of parameters that in my case work well.
w/r,
Kurt J. Strosahl
System Administrator: HPC, Lustre
Scientific Computing Group, Thomas Jefferson National Accelerator Facility
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