If trying the naive approach, a la
find /fs ... -exec changeMyACL {} \;
or
/usr/lpp/mmfs/samples/ilm/mmfind /fs ... -exec changeMyACL {} \; #shameless plug for my mmfind tool, available in the latest release of GPFS. See the associated README.
I think the cost will be prohibitive. I believe a relatively strong internal lock is required to do ACL changes, and consequently I think the performance of modifying the ACL on a bunch of files will be painful at best.
Jamie
Jamie Davis
GPFS Functional Verification Test (FVT)
[email protected]
GPFS Functional Verification Test (FVT)
[email protected]
----- Original message -----
From: Marc A Kaplan/Watson/IBM@IBMUS
Sent by: [email protected]
To: gpfsug main discussion list <[email protected]>
Cc:
Subject: Re: [gpfsug-discuss] fast ACL alter solution
Date: Tue, Aug 11, 2015 1:59 PM
We (myself and a few other GPFS people) are reading this and considering...
Of course we can't promise anything here.
I can see some ways to improve and make easier the job of finding and changing the ACLs of many files.
But I think whatever we end up doing will still be, at best, a matter of changing every inode, rather than changing on ACL that all those inodes happen to point to.
IOW, as a lower bound, we're talking at least as much overhead as doing chmod on the chosen files.
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