Are your performance tests on NFS or on native Lustre clients? Native Lustre
clients will likely be faster, and with many clients they can create files in
parallel, even in the same directory. With a single NFS server they will be
limited by the VFS locking for a single directory.
Are you
Hi Arvid-
> This makes me wonder what lustre even adds in this scenario,
> since zfs is already doing the heavy lifting of managing
> replication and high availability.
ZFS by itself is a local filesystem which you can only mount on one host
at a time; what Lustre adds is taking several ZFS
I'll assume here you're referring to MPI-IO, which is not really a
"feature" but a way to perform parallel I/O using the message passing
interface (MPI) stack. There can also be different interpretations of
what MPI-IO exactly means: many HPC applications (and benchmarks such as
IOR) use MPI
