[gpfsug-discuss] direct IO

[Christoph Martin]

Hello list,

recently, we got the question if we use direct IO in our Scale cluster, 
but we are not sure if we do or not.

We have a three node cluster with shared storage available to all three 
nodes and running CES on all the nodes with SMB/NFS/S3 exports and no 
GPFS nodes attached. So the filesystem is only accessed via CES. The 
cluster has a AFM-DR connection to a secondary GPFS cluster on another 
site.

I would assume from this setup that we don't use direct IO. The nodes 
are connected via Ethernet to the campus network and via Infiniband 
between the three nodes.

How can we check, if we use direct IO?

Regards
Christoph


-------------- next part --------------
A non-text attachment was scrubbed...
Name: OpenPGP_0x04EE131AE6D621BE.asc
Type: application/pgp-keys
Size: 36882 bytes
Desc: OpenPGP public key
URL: <http://gpfsug.org/pipermail/gpfsug-discuss_gpfsug.org/attachments/20250903/f517d407/attachment-0001.key>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: OpenPGP_signature.asc
Type: application/pgp-signature
Size: 833 bytes
Desc: OpenPGP digital signature
URL: <http://gpfsug.org/pipermail/gpfsug-discuss_gpfsug.org/attachments/20250903/f517d407/attachment-0001.sig>