[gpfsug-discuss] AFM gateways

Matt Weil mweil at wustl.edu
Mon Apr 10 21:15:38 BST 2017


Thanks for the answers..  For fail over I believe we will want to keep it separate then.   Next question. Is it licensed as a client or a server?

On 4/10/17 6:20 AM, McLaughlin, Sandra M wrote:
Hi,

I agree with Venkat.

I did exactly what you said below, enabled my NSD servers as gateways to get additional throughput (with both native gpfs protocol and NFS protocol), which worked well; we definitely got the increased traffic. However, I wouldn’t do it again through choice. As Venkat says, if there is a problem with the remote cluster, that can affect any of the gateway nodes (if using gpfs protocol), but also, we had a problem with one of the gateway nodes, where it kept crashing (which is now resolved) and then all filesets for which that node was the gateway had to failover to other gateway servers and this really messes everything up while the failover is taking place. I am also, stupidly, serving NFS and samba from the NSD servers (via ctdb) which I also, would not do again !

It would be nice if there was a way to specify which gateway server is the primary gateway for a specific fileset.

Regards, Sandra

From: gpfsug-discuss-bounces at spectrumscale.org<mailto:gpfsug-discuss-bounces at spectrumscale.org> [mailto:gpfsug-discuss-bounces at spectrumscale.org] On Behalf Of Venkateswara R Puvvada
Sent: 10 April 2017 11:56
To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org><mailto:gpfsug-discuss at spectrumscale.org>
Subject: Re: [gpfsug-discuss] AFM gateways

It is not recommended to make NSD servers as gateway nodes for native GPFS protocol. Unresponsive remote cluster mount might cause gateway node to hang on synchronous operations (ex. Lookup, Read, Open etc..), this will affect NSD server functionality. More information is documented @

https://www.ibm.com/support/knowledgecenter/STXKQY_4.2.2/com.ibm.spectrum.scale.v4r22.doc/bl1ins_NFSvsGPFSAFM.htm

~Venkat (vpuvvada at in.ibm.com<mailto:vpuvvada at in.ibm.com>)



From:        Matt Weil <mweil at wustl.edu<mailto:mweil at wustl.edu>>
To:        gpfsug main discussion list <gpfsug-discuss at spectrumscale.org<mailto:gpfsug-discuss at spectrumscale.org>>
Date:        04/07/2017 08:28 PM
Subject:        [gpfsug-discuss] AFM gateways
Sent by:        gpfsug-discuss-bounces at spectrumscale.org<mailto:gpfsug-discuss-bounces at spectrumscale.org>
________________________________



Hello,

any reason to not enable all NSD servers as gateway when using native
gpfs AFM?  Will they all pass traffic?

Thanks

Matt


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