[OOD-users] evaluating ood and noVNC

Chalker, Alan alanc at osc.edu
Sun Nov 4 08:51:58 EST 2018


Thanks for reaching out.  We'd be curious to hear more technical details about the environment you are seeing this in.  We regularly run MATLAB and terminal instances inside the noVNC sessions and don't have any of these situations.  The only time I recall seeing something like this was during stress testing via trying to ls a directory with tens of thousands of files in it, which caused a memory leak in Firefox.  I don't believe we were able to replicate it on Chrome or Safari.  

Alan Chalker, Ph.D.
alanc at osc.edu

-----Original Message-----
From: OOD-users <ood-users-bounces at lists.osc.edu> On Behalf Of John-Paul Robinson via OOD-users
Sent: Friday, November 2, 2018 4:59 PM
To: ood-users at lists.osc.edu
Subject: [OOD-users] evaluating ood and noVNC

Hi Folks,

We've been evaluating ood and now have a beta instance deployed on our cluster.    Over all, the application works great.  It is exactly what we want to see as a modernization of the  HPC user experience.

Our tests with noVNC are seeing a lot of promise but we've noticed some rendering/responsiveness issues with this interface.  In particular, sometimes we see a lack of updates to text typed in a terminal on the VNC desktop and no updates visible until we click on a desktop outside the terminal.  We are also seeing issues with Matlab rendering updates (matlab has been problematic in the past even with traditional vnc clients, so i'm just putting this one out there).  It seems to me that the problems are due to a refresh-rate/detection issue between the X server and the VNC server agent.  If I connect with a traditional VNC client to the hpc desktop, I see the same update issues as i'm seeing on the noVNC client side.  We are testing with xfce.

Thanks for all the work on this great product,

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