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Posted to user@guacamole.apache.org by steph01 <me...@steph01.dev> on 2025/03/12 15:13:23 UTC
Fwd: Printing is slow
I think I got the sender wrong in the last email, sorry...
-------- Messaggio Inoltrato --------
Oggetto: Printing is slow
Data: Wed, 12 Mar 2025 12:24:58 +0100
Mittente: steph01 <me...@steph01.dev>
A: dev@guacamole.apache.org
Dear Guacamole Team,
I am currently experiencing a performance issue with the RDP printer
functionality in Apache Guacamole. When printing PDF documents through
the virtual printer, the generated files are unexpectedly large and slow
to download.
For example, when I send a PDF file for printing that is approximately
*20-30 MB* in size, the resulting print job produces a file around *120
MB*. It then takes roughly *15 minutes* (estimated) to complete the
download of the print job on the client side. This makes the virtual
printing feature quite impractical in my current setup.
After some investigation, I found a previously reported issue that seems
related: https://issues.apache.org/jira/browse/GUACAMOLE-1522.
I would like to understand if there has been any progress or recommended
workaround regarding this behavior.
My current setup is basically this version of guacamole:
https://github.com/boschkundendienst/guacamole-docker-compose (so 1.5.5
on docker and i'm trying to print a pdf from Windows Host), if you need
more details about my setup (Guacamole version, client/server OS, etc.),
I am happy to provide them.
Thank you for your support, and I appreciate all the work you do on this
great project!
Best regards,
steph01.
Re: Fwd: Printing is slow
Posted by steph01 <me...@steph01.dev>.
Dear Mike,
Thank you very much for your prompt and detailed reply.
I understand your point regarding how Windows applications, such as
Adobe PDF Viewer, might generate large print jobs.
At the moment, enabling the file transfer feature is possible in my
environment, but it's admittedly a bit less user-friendly for our users
compared to simply printing directly. The virtual printer remains the
more intuitive and immediate option for them, which is why I was hoping
to make it work as smoothly as possible.
That said, I also find the current behavior quite odd, and I’m open to
investigating this further. If there’s anything specific you’d like me
to test on my setup, I’d be happy to help.
Thanks again for your support and for the great work you’re doing with
Guacamole!
Best regards,
Il 12/03/25 22:29, Michael Jumper ha scritto:
>> Dear Guacamole Team,
>>
>> I am currently experiencing a performance issue with the RDP printer
>> functionality in Apache Guacamole. When printing PDF documents
>> through the virtual printer, the generated files are unexpectedly
>> large and slow to download.
>>
>> For example, when I send a PDF file for printing that is
>> approximately *20-30 MB* in size, the resulting print job produces a
>> file around *120 MB*. It then takes roughly *15 minutes* (estimated)
>> to complete the download of the print job on the client side. This
>> makes the virtual printing feature quite impractical in my current
>> setup.
>>
>> After some investigation, I found a previously reported issue that
>> seems related: https://issues.apache.org/jira/browse/GUACAMOLE-1522.
>>
>> I would like to understand if there has been any progress or
>> recommended workaround regarding this behavior.
>>
>> My current setup is basically this version of guacamole: https://
>> github.com/boschkundendienst/guacamole-docker-compose (so 1.5.5 on
>> docker and i'm trying to print a pdf from Windows Host), if you need
>> more details about my setup (Guacamole version, client/server OS,
>> etc.), I am happy to provide them.
>>
>> Thank you for your support, and I appreciate all the work you do on
>> this great project!
>>
>
> I've seen the Adobe PDF viewer do this in practice. This is
> unfortunately just the result of the Windows application producing an
> incredibly large PostScript document when instructed to print. If you
> open the print queue within Windows while printing is underway and
> take a peek at the document size, I suspect you'll see that the
> document actually being sent by Windows to the Guacamole printer is
> enormous - far larger than the resulting PDF.
>
> If you can enable file transfer for the connection and just transfer
> the PDF file instead of attempting to print it, that will avoid
> requiring processing of a large PostScript file.
>
> It's also possible that other PDF viewers will behave better, but I
> have not personally tested this.
>
> - Mike
>
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Re: Fwd: Printing is slow
Posted by Michael Jumper <mj...@apache.org>.
> Dear Guacamole Team,
>
> I am currently experiencing a performance issue with the RDP printer
> functionality in Apache Guacamole. When printing PDF documents through
> the virtual printer, the generated files are unexpectedly large and slow
> to download.
>
> For example, when I send a PDF file for printing that is approximately
> *20-30 MB* in size, the resulting print job produces a file around *120
> MB*. It then takes roughly *15 minutes* (estimated) to complete the
> download of the print job on the client side. This makes the virtual
> printing feature quite impractical in my current setup.
>
> After some investigation, I found a previously reported issue that seems
> related: https://issues.apache.org/jira/browse/GUACAMOLE-1522.
>
> I would like to understand if there has been any progress or recommended
> workaround regarding this behavior.
>
> My current setup is basically this version of guacamole: https://
> github.com/boschkundendienst/guacamole-docker-compose (so 1.5.5 on
> docker and i'm trying to print a pdf from Windows Host), if you need
> more details about my setup (Guacamole version, client/server OS, etc.),
> I am happy to provide them.
>
> Thank you for your support, and I appreciate all the work you do on this
> great project!
>
I've seen the Adobe PDF viewer do this in practice. This is
unfortunately just the result of the Windows application producing an
incredibly large PostScript document when instructed to print. If you
open the print queue within Windows while printing is underway and take
a peek at the document size, I suspect you'll see that the document
actually being sent by Windows to the Guacamole printer is enormous -
far larger than the resulting PDF.
If you can enable file transfer for the connection and just transfer the
PDF file instead of attempting to print it, that will avoid requiring
processing of a large PostScript file.
It's also possible that other PDF viewers will behave better, but I have
not personally tested this.
- Mike
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