[gpfsug-discuss] NSD V2 vs V1 - how can you tell?

Oesterlin, Robert Robert.Oesterlin at nuance.com
Fri Jul 28 12:46:47 BST 2017


Hi Scott

This refers to the file system format which is independent of the NSD version number. File systems can be upgraded but all the NSDs are still at V1. For instance, here is an NSD I know is still V1:

[root at gpfs2-gpfs01 ~]# grep msa0319VOL2 volmaps
msa0319VOL2   mpathel   (3600c0ff0001497e259ebac5001000000) dm-19     14T  sdad  0[active][ready] sdft  1[active][ready] sdam  2[active][ready] sdgc  3[active][ready]
[root at gpfs2-gpfs01 ~]# mmfsadm test readdescraw /dev/dm-19 | grep " original format"
    original format version 1001, cur version 1600 (mgr 1600, helper 1600, mnode 1600)

The file system version is current however.

Bob Oesterlin
Sr Principal Storage Engineer, Nuance




From: <gpfsug-discuss-bounces at spectrumscale.org> on behalf of Scott Fadden <sfadden at us.ibm.com>
Reply-To: gpfsug main discussion list <gpfsug-discuss at spectrumscale.org>
Date: Thursday, July 27, 2017 at 3:33 PM
To: "gpfsug-discuss at spectrumscale.org" <gpfsug-discuss at spectrumscale.org>
Cc: "gpfsug-discuss at spectrumscale.org" <gpfsug-discuss at spectrumscale.org>
Subject: [EXTERNAL] Re: [gpfsug-discuss] NSD V2 vs V1 - how can you tell?


# mmfsadm test readdescraw /dev/dm-14 | grep " original format"

    original format version 1600, cur version 1700 (mgr 1700, helper 1700, mnode 1700)

The harder part is what version number = v2 and what matches version 1. The real answer is there is not a simple one, it is not really v1 vs v2 it is what feature you are interested in. Just one small example


4K Disk SECTOR support started in 1403
Dynamically enabling quotas started in 1404
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