[lustre-discuss] LMT 3.2 - MDT display

Crowe, Tom thcrowe at iu.edu
Wed Apr 13 19:22:42 PDT 2016

Thanks for the explanation Olaf.

We updated LMT on a 2.7 file system, which only has a single MDT, so that explains why nothing “new” was showing up in the [ mdt list ] section.

Tom Crowe

On Apr 13, 2016, at 5:40 PM, Faaland, Olaf P. <faaland1 at llnl.gov<mailto:faaland1 at llnl.gov>> wrote:

Reposting to the correct mailing list.
To: Crowe, Tom; lustre-devel at lists.lustre.org<mailto:lustre-devel at lists.lustre.org>
Subject: Re: [lustre-devel] LMT 3.2 - MDT display

Hi Tom,

It sounds like maybe you see the summary and the OST list, but not the MDT list.

The ltop display has 3 different components:
[ summary ]
[ mdt list ]
[ ost list ]

The summary at the top has all the fields displayed in the mdt list; so if you have only 1 MDT, then it doesn't waste the screen space used by an MDT list, and just shows
[ ost list    ]

Does that explain it?

Olaf P. Faaland
Livermore Computing
phone : 925-422-2263
From: lustre-devel [lustre-devel-bounces at lists.lustre.org<mailto:lustre-devel-bounces at lists.lustre.org>] on behalf of Crowe, Tom [thcrowe at iu.edu<mailto:thcrowe at iu.edu>]
Sent: Wednesday, April 13, 2016 1:45 PM
To: lustre-devel at lists.lustre.org<mailto:lustre-devel at lists.lustre.org>
Subject: [lustre-devel] LMT 3.2 - MDT display


After seeing a presentation at LUG16 (http://cdn.opensfs.org/wp-content/uploads/2016/04/LUG2016D1_LMT-Only-a-Flesh-Wound_Faaland.pdf), I was excited to try the updated version of LMT (3.2) as it appeared detailed MDT/MDS information is included in ltop output.

I have successfully built and installed LMT 3.2, but there is no display of MDT info.

Wondering how I might troubleshoot this further. Everything is working, its just not giving me the MDT/MDS info as I expected it might.

Tom Crowe

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