Re: Server specifcations?

Wed, 17 Jun 2020 14:56:16 -0700

Ah!  The lagginess suggests the presence of a buffer. I'll figure out how to disable that; thanks. 

- Jeff

On 6/17/20 4:52 PM, Mike Jumper wrote:
I always deploy Guacamole behind an Nginx reverse proxy for SSL termination. There have never been any latency issues.
If seeing latency only with Nginx, I suspect either a problem in the configuration (didn't disable buffering?) or an Nginx that is old enough to not support WebSocket. 

- Mike
On Wed, Jun 17, 2020, 13:49 Peter De Tender <[email protected] <mailto:[email protected]>> wrote: 

    Hi Jeff,

    I don't experience any latency, but my Nginx is only doing the
    redirect from /guacamole to / so I can directly connect to it from
    Azure FrontDoor. My SSL cert is on Azure Front Door too, not on Nginx.

    I think I could probably do without Nginx alltogether, but the
    setup script had it builtin, and I haven't tried the impact of
    removing it.

    I'm sure some more experienced Guacamole and Nginx admins can
    provide more insights here.

    Thanks Peter

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    ------------------------------------------------------------------------
    *From:* [email protected] <mailto:[email protected]>
    <[email protected] <mailto:[email protected]>>
    *Sent:* Wednesday, June 17, 2020 10:24:45 PM
    *To:* Peter De Tender <[email protected] <mailto:[email protected]>>
    *Cc:* [email protected] <mailto:[email protected]>
    <[email protected] <mailto:[email protected]>>
    *Subject:* Re: Server specifcations?
    Peter, are you using nginx as a reverse proxy inbound into
    Guacamole? I've tried doing that here with Guacamole doing RDP to
    a separate Windows server and it's really draggy whereas browsing
    directly into Guacamole in Tomcat is not. With nginx performing
    the redirect, it's draggy enough that no users are going to be
    happy with it. Tomcat/Guacamole and nginx are running on the same
    machine here but it's not loaded up at all when the connection is
    present so I wonder if it's just a function of how nginx behaves
    with HTML5 traffic the way Guacamole is painting it.

    Thanks,
    - Jeff

    On 6/17/20 5:28 AM, Peter De Tender wrote:


    Hi all,

    To add on this, I’m seeing the same behavior on my systems
    (running as Azure VMs), for our lab scenarios:

      * 20 students using RDP to Windows 2016 Server
      * Active sessions 7hours a day, with about 4h “active use”
        (standby online when trainers are presenting)
      * Azure VM Size: D2sv3 (Xeon E5-2673 2.4Ghz), 2 CPU / 8GB RAM /
        4 SSD drives
      * Average load is about 20% CPU throughout the day, 3,7GB RAM

    FYI, this is a single VM setup with MariaDB and NGINX, running
    behind Azure Front Door SSL Gateway with WAF.

    Thx, Peter

    *From:*ivanmarcus <[email protected]>
    <mailto:[email protected]>
    *Sent:* Wednesday, June 17, 2020 7:31 AM
    *To:* [email protected]
    <mailto:[email protected]>; lynnaj <[email protected]>
    <mailto:[email protected]>
    *Subject:* Re: Server specifcations?

    This is a question that's come up a few times.

    Mike's recommendation is that you  "generally need 1 core and 2
    GB for every 25 concurrent users at peak" (ref this thread:
    
http://apache-guacamole-general-user-mailing-list.2363388.n4.nabble.com/Guacamole-System-Resource-requirements-for-better-performance-td5996.html).

    In the half-dozen installations I have this fits in with my
    experience too. As far as I'm aware no-one has expressed any
    contrary view.

    With regard to disk sizing, I generally run my installations as a
    VM with dynamic sizing up to ~20GB. Most use less than 3GB in
    practice.

    Network bandwidth is more difficult to determine, it will depend
    upon a number of factors around what it is your users are doing,
    and how you have things set up. There have been various
    discussions on this too; I suggest having a look at the mailing
    list referenced above as you may find someone with a use-case
    similar to yours. This thread may be helpful as a start:
    
http://apache-guacamole-general-user-mailing-list.2363388.n4.nabble.com/Viewing-active-connections-while-using-user-mapping-xml-td7844.html#a7861

    In general it's fair to say that Guacamole does a good job with
    compression, and bandwidth requirements are not too onerous.

    On 17/06/2020 4:02 a.m., lynnaj wrote:

        Hello All -


        I can't seem to find anything recent online about Guacamole server

        specifications/recommendations.


        What size/type of server(s) are you running this on and for how many

        concurrent connections? How much memory? How many and what types of 
CPU(s)?

        How much disk space? How much network bandwidth?


        What am I missing?


        Thank you.

        - Lynna Jackson, Williams College


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