[gpfsug-discuss] gpfs filesets question

[Oesterlin, Robert]

Moving data between filesets is like moving files between file systems. Normally when you move files between directories, it’s simple metadata, but with filesets (dependent or independent) is a full copy and delete of the old data.


Bob Oesterlin
Sr Principal Storage Engineer, Nuance


From: <gpfsug-discuss-bounces at spectrumscale.org> on behalf of "J. Eric Wonderley" <eric.wonderley at vt.edu>
Reply-To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
Date: Thursday, April 16, 2020 at 11:32 AM
To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
Subject: [EXTERNAL] [gpfsug-discuss] gpfs filesets question

I have filesets setup in a filesystem...looks like:
[root at cl005 ~]# mmlsfileset home -L
Filesets in file system 'home':
Name                            Id      RootInode  ParentId Created                      InodeSpace      MaxInodes    AllocInodes Comment
root                             0              3        -- Tue Jun 30 07:54:09 2015        0            402653184      320946176 root fileset
hess                             1      543733376         0 Tue Jun 13 14:56:13 2017        0                    0              0
predictHPC                       2        1171116         0 Thu Jan  5 15:16:56 2017        0                    0              0
HYCCSIM                          3      544258049         0 Wed Jun 14 10:00:41 2017        0                    0              0
socialdet                        4      544258050         0 Wed Jun 14 10:01:02 2017        0                    0              0
arc                              5        1171073         0 Thu Jan  5 15:07:09 2017        0                    0              0
arcadm                           6        1171074         0 Thu Jan  5 15:07:10 2017        0                    0              0

I beleive these are dependent filesets.  Dependent on the root fileset.   Anyhow a user wants to move a large amount of data from one fileset to another.   Would this be a metadata only operation?  He has attempted to small amount of data and has noticed some thrasing.
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