NFSv4 locking issue with the HDF5 library -
the app library for HDF5 has an issue with NFSv4.. it can be worked around, but our fear is that it shows up in another application the result is "I cant get a file lock" (this was tested on Ganesha) Articles. https://serverfault.com/questions/972623/parallel-mpi-file-open-failed-on-nf... https://forum.hdfgroup.org/t/hdf5-files-on-nfs/3985/8 does this sound familiar to anyone? Installed Versions: gpfs.nfs-ganesha-gpfs-2.7.5-ibm057.00.el7.x86_64 gpfs.nfs-ganesha-utils-2.7.5-ibm057.00.el7.x86_64 gpfs.nfs-ganesha-2.7.5-ibm057.00.el7.x86_64 noob here.. please forgive me if i've posted in the wrong place.
tcpdump capture from the server around failure time would help. Do you have the same issue if you use Linux kernel NFS server or only Ganesha? On Wed, Oct 28, 2020 at 12:48 AM <sgoldman@pixitmedia.com> wrote:
the app library for HDF5 has an issue with NFSv4.. it can be worked around, but our fear is that it shows up in another application the result is "I cant get a file lock" (this was tested on Ganesha)
Articles.
https://serverfault.com/questions/972623/parallel-mpi-file-open-failed-on-nf... https://forum.hdfgroup.org/t/hdf5-files-on-nfs/3985/8
does this sound familiar to anyone?
Installed Versions: gpfs.nfs-ganesha-gpfs-2.7.5-ibm057.00.el7.x86_64 gpfs.nfs-ganesha-utils-2.7.5-ibm057.00.el7.x86_64 gpfs.nfs-ganesha-2.7.5-ibm057.00.el7.x86_64
noob here.. please forgive me if i've posted in the wrong place. _______________________________________________ Devel mailing list -- devel@lists.nfs-ganesha.org To unsubscribe send an email to devel-leave@lists.nfs-ganesha.org
Hi Malahal, Thank you for responding.. I'm not really looking for break/fix help (at this moment), but was wondering if anyone knows about the HDF5+Ganesha combination - and if there are any configs that could be applied. It's very possible we'll need to fix, but for right now, this is just an inquiry..
Hi Malahal, Thank you for responding..
I'm not really looking for break/fix help (at this moment), but was wondering if anyone knows about the HDF5+Ganesha combination - and if there are any configs that could be applied.
It's very possible we'll need to fix, but for right now, this is just an inquiry..
I hadn't heard of HDF5 before this, so I'm not sure. A quick google of "hdf5 nfs" suggests issues with parallel mode due to flock, which makes sense. Flock doesn't play well with NFS. Frank
participants (3)
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Frank Filz -
Malahal Naineni -
sgoldman＠pixitmedia.com