[gpfsug-discuss] gpfs filesets question

[J. Eric Wonderley]

Hi Fred:

I do.  I have 3 pools.  system, ssd data pool(fc_ssd400G) and a spinning
disk pool(fc_8T).

I want to think the ssd_data_pool is empty at the moment and the system
pool is ssd and only contains metadata.
[root at cl005 ~]# mmdf home -P fc_ssd400G
disk                disk size  failure holds    holds              free KB
            free KB
name                    in KB    group metadata data        in full blocks
       in fragments
--------------- ------------- -------- -------- ----- --------------------
-------------------
Disks in storage pool: fc_ssd400G (Maximum disk size allowed is 97 TB)
r10f1e8            1924720640     1001 No       Yes      1924644864 (100%)
         9728 ( 0%)
r10f1e7            1924720640     1001 No       Yes      1924636672 (100%)
        17408 ( 0%)
r10f1e6            1924720640     1001 No       Yes      1924636672 (100%)
        17664 ( 0%)
r10f1e5            1924720640     1001 No       Yes      1924644864 (100%)
         9728 ( 0%)
r10f6e8            1924720640     1001 No       Yes      1924644864 (100%)
         9728 ( 0%)
r10f1e9            1924720640     1001 No       Yes      1924644864 (100%)
         9728 ( 0%)
r10f6e9            1924720640     1001 No       Yes      1924644864 (100%)
         9728 ( 0%)
                -------------                         --------------------
-------------------
(pool total)      13473044480                           13472497664 (100%)
        83712 ( 0%)

More or less empty.

Interesting...


On Thu, Apr 16, 2020 at 1:11 PM Frederick Stock <stockf at us.ibm.com> wrote:

> Do you have more than one GPFS storage pool in the system?  If you do and
> they align with the filesets then that might explain why moving data from
> one fileset to another is causing increased IO operations.
>
> Fred
> __________________________________________________
> Fred Stock | IBM Pittsburgh Lab | 720-430-8821
> stockf at us.ibm.com
>
>
>
> ----- Original message -----
> From: "J. Eric Wonderley" <eric.wonderley at vt.edu>
> Sent by: gpfsug-discuss-bounces at spectrumscale.org
> To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
> Cc:
> Subject: [EXTERNAL] [gpfsug-discuss] gpfs filesets question
> Date: Thu, Apr 16, 2020 12:32 PM
>
> 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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