Re: nfsvers and nfs-utils-1.3.0-0.48.el7

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]



On 10/12/2017 12:33 PM, Paul Heinlein wrote:
> We encountered a weird problem today, and I thought some of you might
> like to hear the solution.
> 
> The underlying change was listed in the 7.4 changelog, so it's not a
> bug, but it may drive you buggy.
> 
> The majority of our HPC cluster nodes run CentOS 7, though the exact
> patch levels vary from node to node. None is older than 7.3, but a few
> newer nodes were kickstarted right to 7.4.
> 
> The problem was that our mounts of Isilon NFS exports were failing
> randomly among the nodes. Routing was fine. Network connectivity was fine.
> 
> The short answer is that the default in 7.4, and I think in the
> nfs-utils-1.3.0-0.48.el7 package in particular, has changed. While NFS
> v4.0 was the default up to 7.3, the 7.4 protocols are subtly different:
> 
> 1. Try NFS v4.1 first
> 2. Fail down to NFS v3
> 3. Fail down to NFS v2
> 
> The problem is that our Isilon works with NFS v4.0, not 4.1, but 4.0 is
> not in the fail-down path.
> 
> The short-term answer is to specify nfsvers=4.0 in our autofs
> configuration files, which works like a charm.
> 
> Like I said, this was an announced change, but the implications escaped
> us until now. So this little writeup is just for the record.
> 

You are not the first person to have this issue .. thanks for the post.

Attachment: signature.asc
Description: OpenPGP digital signature

_______________________________________________
CentOS mailing list
CentOS@xxxxxxxxxx
https://lists.centos.org/mailman/listinfo/centos

[Index of Archives]     [CentOS]     [CentOS Announce]     [CentOS Development]     [CentOS ARM Devel]     [CentOS Docs]     [CentOS Virtualization]     [Carrier Grade Linux]     [Linux Media]     [Asterisk]     [DCCP]     [Netdev]     [Xorg]     [Linux USB]


  Powered by Linux