[gpfsug-discuss] Checking for Stale File Handles

Ryan Novosielski novosirj at rutgers.edu
Fri Aug 9 19:09:18 BST 2019


I’ve needed the same sort of thing — we use NHC to check for FS status and we’ve had cases that we were not able to detect because they were in this “Stale file handle” state. GPFS doesn’t always seem to behave in the way Linux would expect.

> On Aug 9, 2019, at 2:03 PM, Frederick Stock <stockf at us.ibm.com> wrote:
> 
> Are you able to explain why you want to check for stale file handles?  Are you attempting to detect failures of some sort, and why do the existing mechanisms in GPFS not provide the functionality you require?
> 
> Fred
> __________________________________________________
> Fred Stock | IBM Pittsburgh Lab | 720-430-8821
> stockf at us.ibm.com
>  
>  
> ----- Original message -----
> From: Alexander John Mamach <alex.mamach at northwestern.edu>
> Sent by: gpfsug-discuss-bounces at spectrumscale.org
> To: "gpfsug-discuss at spectrumscale.org" <gpfsug-discuss at spectrumscale.org>
> Cc:
> Subject: [EXTERNAL] [gpfsug-discuss] Checking for Stale File Handles
> Date: Fri, Aug 9, 2019 1:46 PM
>  
> Hi folks,
>  
> We’re currently investigating a way to check for stale file handles on the nodes across our cluster in a way that minimizes impact to the filesystem and performance.
>  
> Has anyone found a direct way of doing so? We considered a few methods, including simply attempting to ls a GPFS filesystem from each node, but that might have false positives, (detecting slowdowns as stale file handles), and could negatively impact performance with hundreds of nodes doing this simultaneously.
>  
> Thanks,
>  
> Alex
>  
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