[lustre-discuss] Coexistence of Luster client and server on a single machine

[Wahl, Edward]

I frequently use my hot-spare MDT machine for brief testing with a client.  Usually when we have scheduled outages.  I wouldn't rely on it for a day to day thing, but for testing to see if everything is working properly after patches, outages, upgrades, etc it seems to work fine.  I've used the main once or twice but tend to cross my fingers the entire time. 

This has worked since about ~1.[6|7]?  Definitely in 1.8  Still working today on the 2.5.x main.

Ed Wahl
OSC

________________________________________
From: lustre-discuss [lustre-discuss-bounces at lists.lustre.org] on behalf of Ben Evans [jevans at cray.com]
Sent: Thursday, May 21, 2015 9:43 AM
To: Lukas Hejtmanek; lustre-discuss at lists.lustre.org
Subject: Re: [lustre-discuss] Coexistence of Luster client and server on        a       single machine

I believe it is OK for some simple functional testing, but not production, or working with large datasets.

OSTs and MDTs can coexist, and I believe OSTs and Clients can coexist relatively peacefully, but MDTs and Clients are a bad mix.

-Ben Evans

-----Original Message-----
From: lustre-discuss [mailto:lustre-discuss-bounces at lists.lustre.org] On Behalf Of Lukas Hejtmanek
Sent: Thursday, May 21, 2015 7:34 AM
To: lustre-discuss at lists.lustre.org
Subject: [lustre-discuss] Coexistence of Luster client and server on a single machine

Hello,

some time ago I asked whether it is possible to run lustre server (OSD) and client (mount -t lustre) on the same machine. Somewhere close to Lustre 1.3.x, the answer was not, such setup is not recommended due to VM pressure from client and server.

Is there anything new with current mainline Lustre version? So, can I mount my lustre fs on the same server that is used as OSD or MTS without harm?

--
Lukáš Hejtmánek
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