[gpfsug-discuss] undo fileset inode allocation

[Bryan Banister]

Honestly this sounds like you may be in a very dangerous situation and would HIGHLY recommend opening a PMR immediately to get direct, authoritative instruction from IBM,
-Bryan

From: gpfsug-discuss-bounces at spectrumscale.org [mailto:gpfsug-discuss-bounces at spectrumscale.org] On Behalf Of Eric Horst
Sent: Friday, January 06, 2017 1:07 PM
To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
Subject: [gpfsug-discuss] undo fileset inode allocation

Greetings all,

I've been setting up and migrating to a new 225TB filesystem on 4.2.1. Separate data and metadata disks. There are about 20 independent filesets as second level directories which have all the files. One of the independent filesets hit its inode limit of 28M. Without carefully checking my work I accidentally changed the limit to 3.2B inodes instead of 32M inodes. This ran for 15 minutes and when it was done I see mmdf shows that I had 0% metadata space free. There was previously 72% free.

Thinking about it I reasoned that as independent filesets I might get that metadata space back if I unlinked and deleted that fileset. After doing so I find I have metadata 11% free. A far cry from the 72% I used to have. Are there other options for undoing this mistake? Or should I not worry that I'm at 11% and assume that whatever was preallocated will be productively used over the life of this filesystem?

Thanks,

-Eric

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