linux-ext4 - Re: [PATCH] test-appliance: add new test configuration: ext4/lustre

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Date:   Fri, 23 Jun 2017 17:41:09 -0400
From:   Theodore Ts'o <tytso@....edu>
To:     Andreas Dilger <adilger@...ger.ca>
Cc:     Artem Blagodarenko <artem.blagodarenko@...gate.com>,
        Ext4 Developers List <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH] test-appliance: add new test configuration:
 ext4/lustre_mds

On Fri, Jun 09, 2017 at 03:00:56PM -0600, Andreas Dilger wrote:
> 
> I didn't include large_dir because it isn't included in the upstream
> kernels yet, and we haven't been using this in production due to lack
> of e2fsck support (which Seagate has finally implemented, thank you).

Also, does Lustre use large_dir on the MDS server, or on the Lustre
data server?  Because I noticed that on the MDS server you're
apparently not using extents:

export EXT_MKFS_OPTIONS="-I 2048 -O ^64bit,mmp,uninit_bg,^extents,dir_nlink,...
                                                         ^^^^^^^^

Are you really using large_dir on a file system that is using indirect
block mapped files?

						- Ted