[lustre-discuss] Apache via NFS via Lustre

E.S. Rosenberg esr+lustre at mail.hebrew.edu
Tue Dec 15 10:50:36 PST 2015

Hi Eric,

Since we also have some issues with servers accessing files this issue
interests me...
Did you find anything on this?


On Mon, Nov 30, 2015 at 7:53 PM, Eric Kolb <ekolb at uvic.ca> wrote:

> Hello,
> Perhaps someone has seen a similar issue? If so any insight would be
> appreciated.
> We recently migrated some websites from an NFS share by which the NFS
> server is exporting a share sitting on a Lustre mount. Below is the issue.
> - sftp a file to website.ca - the load balancer will direct session to
> server1 or server2, let us say server1 in this case
> - Accessing the file with Apache via server1 works but via server2 a NFS
> EIO -13 error is encountered
> - On server1 (or server2) copy the file to /dev/null makes the file
> accessible to Apache on either server1 or server2
> - As work around sftp file to a temporary location, then ssh into
> website.ca and "cp tmp/file.jpeg www/file.jpeg", this allows then
> Apache on either server1 or server2 to access the file
> - Created an lseek C program to try mimicking a captured Apache strace but
> it shows success on any combination of file access scenarios
> Prior to adding in Lustre no such such issues were encountered.
> Thanks,
> --
> Eric Kolb
> DCS - UVic Systems
> University of Victoria
> Office: 250-721-7658
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> lustre-discuss mailing list
> lustre-discuss at lists.lustre.org
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