Graphical Performance Question

["Nanney, Ryan (GE Healthcare, consultant)" <Ry...@ge.com>]

Hello all,

I am a technical product owner with GE Healthcare and we are using Guacamole to provide medical professionals an ability to remotely access applications while reviewing diagnostic imaging such as MRI scans.  Overall our experience with Guacamole has been quite good, though we have an area of concern and are curious what types of options exist.  The symptom we are facing is during certain instances of cinematic playback there are blocky (64x64 squares) areas which become noticeable at certain times.  I was able to watch the websocket traffic to identify this scenario.

I have attached a small MKV video to illustrate the playback issue folks are having issue with, for your review.

We are operating off of a Gigabit LAN environment and Guacamole is exposed to the LAN, the rest of the traffic happens inside of a virtualized environment.  Our endpoints are all using RDP, either from Windows Server 2012R2 or Windows Server 2019.

It has been observed that direct RDP provides a smoother playback experience.  Also, it seems that server 2019 is better than 2012R2.  We have tried both the docker container and building from source, with version 1.0.0 and 1.1.0 which produce similar experiences.  An nginx server is also in play, though we have tested with that removed from the stack.

I certainly welcome any feedback or ideas anyone may have.  We would like to understand the cause and what the potential fix(es) may be.  It seems to be something within guacd or tomcat?

Thank you!
Ryan

RE: EXT: Re: Graphical Performance Question

["Nanney, Ryan (GE Healthcare, consultant)" <Ry...@ge.com>]

Hello Nick,

Thanks for your reply!  We have kept an eye on resource usage across the guac VM depending on which use case we tried.  In order to try and minimize that possibility we gave 8vCPU and 8GB ram to the VM and tried with one concurrent user.  Using top/iotop to keep tabs on things, we have not seen any obvious bottlenecks with this approach.  Thanks again!

Best regards,
Ryan

From: Nick Couchman <vn...@apache.org>
Sent: Thursday, April 16, 2020 2:09 PM
To: user@guacamole.apache.org
Subject: EXT: Re: Graphical Performance Question

On Thu, Apr 16, 2020 at 3:04 PM Nanney, Ryan (GE Healthcare, consultant) <Ry...@ge.com>> wrote:
Hello all,

I am a technical product owner with GE Healthcare and we are using Guacamole to provide medical professionals an ability to remotely access applications while reviewing diagnostic imaging such as MRI scans.  Overall our experience with Guacamole has been quite good, though we have an area of concern and are curious what types of options exist.  The symptom we are facing is during certain instances of cinematic playback there are blocky (64x64 squares) areas which become noticeable at certain times.  I was able to watch the websocket traffic to identify this scenario.

I have attached a small MKV video to illustrate the playback issue folks are having issue with, for your review.

We are operating off of a Gigabit LAN environment and Guacamole is exposed to the LAN, the rest of the traffic happens inside of a virtualized environment.  Our endpoints are all using RDP, either from Windows Server 2012R2 or Windows Server 2019.

It has been observed that direct RDP provides a smoother playback experience.  Also, it seems that server 2019 is better than 2012R2.  We have tried both the docker container and building from source, with version 1.0.0 and 1.1.0 which produce similar experiences.  An nginx server is also in play, though we have tested with that removed from the stack.

I certainly welcome any feedback or ideas anyone may have.  We would like to understand the cause and what the potential fix(es) may be.  It seems to be something within guacd or tomcat?


Ryan,
Have you examined resource utilization on both the system running guacd and the system running Tomcat (may be the same system?) to make sure there isn't any resource shortage, there?

-Nick

Re: Graphical Performance Question

[Nick Couchman <vn...@apache.org>]

On Thu, Apr 16, 2020 at 3:04 PM Nanney, Ryan (GE Healthcare, consultant) <
Ryan.Nanney@ge.com> wrote:

> Hello all,
>
>
>
> I am a technical product owner with GE Healthcare and we are using
> Guacamole to provide medical professionals an ability to remotely access
> applications while reviewing diagnostic imaging such as MRI scans.  Overall
> our experience with Guacamole has been quite good, though we have an area
> of concern and are curious what types of options exist.  The symptom we are
> facing is during certain instances of cinematic playback there are blocky
> (64x64 squares) areas which become noticeable at certain times.  I was able
> to watch the websocket traffic to identify this scenario.
>
>
>
> I have attached a small MKV video to illustrate the playback issue folks
> are having issue with, for your review.
>
>
>
> We are operating off of a Gigabit LAN environment and Guacamole is exposed
> to the LAN, the rest of the traffic happens inside of a virtualized
> environment.  Our endpoints are all using RDP, either from Windows Server
> 2012R2 or Windows Server 2019.
>
>
>
> It has been observed that direct RDP provides a smoother playback
> experience.  Also, it seems that server 2019 is better than 2012R2.  We
> have tried both the docker container and building from source, with version
> 1.0.0 and 1.1.0 which produce similar experiences.  An nginx server is also
> in play, though we have tested with that removed from the stack.
>
>
>
> I certainly welcome any feedback or ideas anyone may have.  We would like
> to understand the cause and what the potential fix(es) may be.  It seems to
> be something within guacd or tomcat?
>
>
>

Ryan,
Have you examined resource utilization on both the system running guacd and
the system running Tomcat (may be the same system?) to make sure there
isn't any resource shortage, there?

-Nick