Re: [zeromq-dev] Limited UDP Message Size

[Greg Young]

If not clear ... if you are on a network *you control* is very different
than being on one you do not.

On Sun, Jan 12, 2020 at 5:02 PM Greg Young  wrote:

> This is correct ... Some things may not accept/forward it.
>
> Beyond that its common for things to get *added to it* thus you want to be
> below. Consider a case where its being wrapped (tunneling is a good
> example).
>
> Over the internet the maximum completely safe size is even smaller
> around 500-600 bytes :O You can usually get above this but +- 1k is about
> the limit.
>
>
> On Sun, Jan 12, 2020 at 4:42 PM Stephan Opfer 
> wrote:
>
>> Ah okay. I read some posts about MTU and fragmentation. So in theory
>> 2^16= 65536 Bytes should be possible, but not all nodes will accept such
>> large UDP packets and support the fragmentation of it?
>>
>> FYI: My use case is that of a local network (IOT + Autonomous Robots) and
>> increasing the size would help me. :)
>> On 12.01.20 13:25, Doron Somech wrote:
>>
>> We can increase it to around 65,000 bytes, however, large UDP packets
>> would probably be dropped when traveling outside your local area network.
>> The safe size for the UDP packet to travel outside of the local area
>> network is around 500 bytes.
>> If you do want to use large UDP packets on your local area network you
>> might want to increase the network MTU (jumbo frames) for better delivery.
>>
>> For example, some AWS instances support 9001 bytes MTU for inter-instance
>> communication.
>>
>>
>> On Fri, Jan 10, 2020 at 3:25 PM Stephan Opfer 
>> wrote:
>>
>>> Hi all,
>>>
>>> since 2016 there is this issue
>>> (https://github.com/zeromq/libzmq/issues/2009) about some limitations
>>> of
>>> the udp_engine in libzmq.
>>>
>>> Is it possible that someone at least will increase the "#define
>>> MAX_UDP_MSG 8192" in libzmq/src/udp_engine.hpp to some reasonable value?
>>> For example "ZMQ_MAX_MSGSZ" from the zmq context option, which is
>>> MAX_INT.
>>>
>>> Maybe, someone could spare some time at the Hackathon... ;-)
>>>
>>> Greetings,
>>>
>>>Stephan
>>>
>>> --
>>> Distributed Systems Research Group
>>> Stephan Opfer  T. +49 561 804-6279  F. +49 561 804-6277
>>> Univ. Kassel,  FB 16,  Wilhelmshöher Allee 73,  D-34121 Kassel
>>> WWW: http://www.uni-kassel.de/go/vs_stephan-opfer/
>>>
>>> ___
>>> zeromq-dev mailing list
>>> zeromq-dev@lists.zeromq.org
>>> https://lists.zeromq.org/mailman/listinfo/zeromq-dev
>>>
>>
>> ___
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>>
>> --
>> Distributed Systems Research Group
>> Stephan Opfer  T. +49 561 804-6279  F. +49 561 804-6277
>> Univ. Kassel,  FB 16,  Wilhelmshöher Allee 73,  D-34121 Kassel
>> WWW: http://www.uni-kassel.de/go/vs_stephan-opfer/
>>
>> ___
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>> https://lists.zeromq.org/mailman/listinfo/zeromq-dev
>>
>
>
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> Studying for the Turing test
>


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Re: [zeromq-dev] Limited UDP Message Size

[Greg Young]

This is correct ... Some things may not accept/forward it.

Beyond that its common for things to get *added to it* thus you want to be
below. Consider a case where its being wrapped (tunneling is a good
example).

Over the internet the maximum completely safe size is even smaller
around 500-600 bytes :O You can usually get above this but +- 1k is about
the limit.


On Sun, Jan 12, 2020 at 4:42 PM Stephan Opfer 
wrote:

> Ah okay. I read some posts about MTU and fragmentation. So in theory
> 2^16= 65536 Bytes should be possible, but not all nodes will accept such
> large UDP packets and support the fragmentation of it?
>
> FYI: My use case is that of a local network (IOT + Autonomous Robots) and
> increasing the size would help me. :)
> On 12.01.20 13:25, Doron Somech wrote:
>
> We can increase it to around 65,000 bytes, however, large UDP packets
> would probably be dropped when traveling outside your local area network.
> The safe size for the UDP packet to travel outside of the local area
> network is around 500 bytes.
> If you do want to use large UDP packets on your local area network you
> might want to increase the network MTU (jumbo frames) for better delivery.
>
> For example, some AWS instances support 9001 bytes MTU for inter-instance
> communication.
>
>
> On Fri, Jan 10, 2020 at 3:25 PM Stephan Opfer 
> wrote:
>
>> Hi all,
>>
>> since 2016 there is this issue
>> (https://github.com/zeromq/libzmq/issues/2009) about some limitations of
>> the udp_engine in libzmq.
>>
>> Is it possible that someone at least will increase the "#define
>> MAX_UDP_MSG 8192" in libzmq/src/udp_engine.hpp to some reasonable value?
>> For example "ZMQ_MAX_MSGSZ" from the zmq context option, which is MAX_INT.
>>
>> Maybe, someone could spare some time at the Hackathon... ;-)
>>
>> Greetings,
>>
>>Stephan
>>
>> --
>> Distributed Systems Research Group
>> Stephan Opfer  T. +49 561 804-6279  F. +49 561 804-6277
>> Univ. Kassel,  FB 16,  Wilhelmshöher Allee 73,  D-34121 Kassel
>> WWW: http://www.uni-kassel.de/go/vs_stephan-opfer/
>>
>> ___
>> zeromq-dev mailing list
>> zeromq-dev@lists.zeromq.org
>> https://lists.zeromq.org/mailman/listinfo/zeromq-dev
>>
>
> ___
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>
> --
> Distributed Systems Research Group
> Stephan Opfer  T. +49 561 804-6279  F. +49 561 804-6277
> Univ. Kassel,  FB 16,  Wilhelmshöher Allee 73,  D-34121 Kassel
> WWW: http://www.uni-kassel.de/go/vs_stephan-opfer/
>
> ___
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> zeromq-dev@lists.zeromq.org
> https://lists.zeromq.org/mailman/listinfo/zeromq-dev
>


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Re: [zeromq-dev] Limited UDP Message Size

[Stephan Opfer]

Ah okay. I read some posts about MTU and fragmentation. So in theory  
2^16= 65536 Bytes should be possible, but not all nodes will accept such 
large UDP packets and support the fragmentation of it?


FYI: My use case is that of a local network (IOT + Autonomous Robots) 
and increasing the size would help me. :)


On 12.01.20 13:25, Doron Somech wrote:
We can increase it to around 65,000 bytes, however, large UDP packets 
would probably be dropped when traveling outside your local area network.
The safe size for the UDP packet to travel outside of the local area 
network is around 500 bytes.
If you do want to use large UDP packets on your local area network you 
might want to increase the network MTU (jumbo frames) for better delivery.


For example, some AWS instances support 9001 bytes MTU for 
inter-instance communication.



On Fri, Jan 10, 2020 at 3:25 PM Stephan Opfer > wrote:


Hi all,

since 2016 there is this issue
(https://github.com/zeromq/libzmq/issues/2009) about some
limitations of
the udp_engine in libzmq.

Is it possible that someone at least will increase the "#define
MAX_UDP_MSG 8192" in libzmq/src/udp_engine.hpp to some reasonable
value?
For example "ZMQ_MAX_MSGSZ" from the zmq context option, which is
MAX_INT.

Maybe, someone could spare some time at the Hackathon... ;-)

Greetings,

   Stephan

-- 
Distributed Systems Research Group

Stephan Opfer  T. +49 561 804-6279  F. +49 561 804-6277
Univ. Kassel,  FB 16,  Wilhelmshöher Allee 73,  D-34121 Kassel
WWW: http://www.uni-kassel.de/go/vs_stephan-opfer/

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Stephan Opfer  T. +49 561 804-6279  F. +49 561 804-6277
Univ. Kassel,  FB 16,  Wilhelmshöher Allee 73,  D-34121 Kassel
WWW: http://www.uni-kassel.de/go/vs_stephan-opfer/

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Re: [zeromq-dev] FOSDEM 2020 ZeroMQ gathering/meetup/hackaton/knitting club on Monday 3rd and Tuesday 4th February 2020

[Ivan Serdyuk]

Hope someone would submit a proposal, after the conference, to give a talk
at https://fwdays.com/en/event/highload-fwdays-2020 .
Ivan

On Fri, Aug 23, 2019 at 6:54 PM Luca Boccassi 
wrote:

> On Sun, 2019-08-11 at 11:54 +0100, Luca Boccassi wrote:
> > Hello all,
> >
> > It's that time of the year again - well, almost.
> >
> > The dates for FOSDEM 2020 have been announced - 1st and 2nd of
> > February.
> >
> > Shall we organize the usual ZeroMQ meetup?
> >
> > https://fosdem.org/2020/news/2019-08-11-dates-fosdem-2020/
>
> Hi,
>
> Here's the event page:
>
>
> http://wiki.zeromq.org/event:zeromq-post-fosdem-hackaton-mon-3-tue-4-feb-2020
>
> The event is free as usual, but it would be nice if folks registered on
> the event page or by replying via email here so that we have an idea of
> how many to expect. As usual please feel free to list topics you'd like
> to discuss/hack/work on.
>
> I'll register it as a FOSDEM fringe event as usual for visibility.
>
> It's a long way out but already can't wait!
>
> --
> Kind regards,
> Luca Boccassi
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Re: [zeromq-dev] FOSDEM 2020 ZeroMQ gathering/meetup/hackaton/knitting club on Monday 3rd and Tuesday 4th February 2020

[Ivan Serdyuk]

Please email me, if you would be interested to visit Ukraine (a meetup), on
a way back from the conf. Assuming that you would head back to Israel...

Ivan

On Sun, Jan 12, 2020 at 1:49 PM Doron Somech  wrote:

> I'm arriving on Friday morning actually, so if anyone in the city and
> would like to hack zeromq (or dafka), let me know.
>
> > Is anyone up for a beer on Saturday or Sunday evening?
>
> Yes, although I'm not drinking beer...
>
> On Sat, Jan 11, 2020 at 8:09 PM Benjamin Henrion  wrote:
>
>>
>>
>> On Saturday, January 11, 2020, Simon Giesecke 
>> wrote:
>>
>>> Hi,
>>>
>>> I am still somewhat confused about the location of the hackathon. Does
>>> the Hackerspace have a website, or can someone give instructions on how to
>>> access it? I don't even know the name of the place...
>>>
>>
>> It's the ground floor of Hugo ´s house.
>>
>> There is no website (yet).
>>
>> There is the address on the page.
>>
>>
>>>
>>> Is anyone up for a beer on Saturday or Sunday evening?
>>>
>>
>> Sure, i might go to the hsbxl party this year...
>>
>>
>>>
>>> Best wishes
>>> Simon
>>>
>>> Luca Boccassi  schrieb am Mi., 8. Jan. 2020,
>>> 11:51:
>>>
 On Wed, 2019-09-04 at 11:01 +0100, Luca Boccassi wrote:
 > On Fri, 2019-08-23 at 16:53 +0100, Luca Boccassi wrote:
 > > On Sun, 2019-08-11 at 11:54 +0100, Luca Boccassi wrote:
 > > > Hello all,
 > > >
 > > > It's that time of the year again - well, almost.
 > > >
 > > > The dates for FOSDEM 2020 have been announced - 1st and 2nd of
 > > > February.
 > > >
 > > > Shall we organize the usual ZeroMQ meetup?
 > > >
 > > > https://fosdem.org/2020/news/2019-08-11-dates-fosdem-2020/
 > > >
 > > >
 > >
 > > Hi,
 > >
 > > Here's the event page:
 > >
 > >
 http://wiki.zeromq.org/event:zeromq-post-fosdem-hackaton-mon-3-tue-4-feb-2020
 > >
 > >
 > >
 > > The event is free as usual, but it would be nice if folks
 > > registered
 > > on
 > > the event page or by replying via email here so that we have an
 > > idea
 > > of
 > > how many to expect. As usual please feel free to list topics you'd
 > > like
 > > to discuss/hack/work on.
 > >
 > > I'll register it as a FOSDEM fringe event as usual for visibility.
 > >
 > > It's a long way out but already can't wait!
 >
 > Hi,
 >
 > Note that we are changing the event location, from HSXBL to a new
 > Hackerspace that is opening this month in the centre of town, see the
 > meetup page for latest updates:
 >
 > https://www.meetup.com/ZeroMQ-FOSDEM-side-event/events/264336737/

 Less than a month to go! Reminder for everybody to book
 travel keeping in mind the 0MQ event on Monday/Tuesday :-)

 --
 Kind regards,
 Luca Boccassi
 ___
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>>>
>>
>> --
>> Benjamin Henrion (zoobab)
>> Email: zoobab at gmail.com
>> Mobile: +32-484-566109
>> Web: http://www.zoobab.com
>> FFII.org Brussels
>> "In July 2005, after several failed attempts to legalise software patents
>> in Europe, the patent establishment changed its strategy. Instead of
>> explicitly seeking to sanction the patentability of software, they are now
>> seeking to create a central European patent court, which would establish
>> and enforce patentability rules in their favor, without any possibility of
>> correction by competing courts or democratically elected legislators."
>> ___
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>>
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Re: [zeromq-dev] FOSDEM 2020 ZeroMQ gathering/meetup/hackaton/knitting club on Monday 3rd and Tuesday 4th February 2020

[Ivan Serdyuk]

Benjamin,
you are welcome to submit future proposals, related to IoT use cases, to
http://www.embeddedfest.com/indexe.html.
Ivan

On Thu, Oct 3, 2019 at 4:57 PM Benjamin Henrion  wrote:

> On Thu, Oct 3, 2019 at 11:53 AM Luca Boccassi 
> wrote:
> >
> > On Wed, 2019-09-04 at 11:01 +0100, Luca Boccassi wrote:
> > > On Fri, 2019-08-23 at 16:53 +0100, Luca Boccassi wrote:
> > > > On Sun, 2019-08-11 at 11:54 +0100, Luca Boccassi wrote:
> > > > > Hello all,
> > > > >
> > > > > It's that time of the year again - well, almost.
> > > > >
> > > > > The dates for FOSDEM 2020 have been announced - 1st and 2nd of
> > > > > February.
> > > > >
> > > > > Shall we organize the usual ZeroMQ meetup?
> > > > >
> > > > > https://fosdem.org/2020/news/2019-08-11-dates-fosdem-2020/
> > > > >
> > > > >
> > > >
> > > > Hi,
> > > >
> > > > Here's the event page:
> > > >
> > > >
> http://wiki.zeromq.org/event:zeromq-post-fosdem-hackaton-mon-3-tue-4-feb-2020
> > > >
> > > >
> > > >
> > > > The event is free as usual, but it would be nice if folks
> > > > registered
> > > > on
> > > > the event page or by replying via email here so that we have an
> > > > idea
> > > > of
> > > > how many to expect. As usual please feel free to list topics you'd
> > > > like
> > > > to discuss/hack/work on.
> > > >
> > > > I'll register it as a FOSDEM fringe event as usual for visibility.
> > > >
> > > > It's a long way out but already can't wait!
> > >
> > > Hi,
> > >
> > > Note that we are changing the event location, from HSXBL to a new
> > > Hackerspace that is opening this month in the centre of town, see the
> > > meetup page for latest updates:
> > >
> > > https://www.meetup.com/ZeroMQ-FOSDEM-side-event/events/264336737/
> >
> > Hi Benjamin,
> >
> > Is there any update on this new hackerspace? Still cannot find any
> > information about it online.
>
> I have attended the inauguration event, it was great, I will talk to
> Ugo to see what we can do for the web presence.
>
> I might redo a first workshop there with soldering for kids and adults:
>
> http://www.zoobab.com/soldering-workshop-for-kids-and-adults
>
> See ya,
>
> PS: I have just received the greenlight for an IOT devroom this year,
> tell me if you have some projects for it
> PS2: Tomorrow is the third anniversary of Pieter's dissapearance
>
> --
> Benjamin Henrion (zoobab)
> Email: zoobab at gmail.com
> Mobile: +32-484-566109
> Web: http://www.zoobab.com
> FFII.org Brussels
> "In July 2005, after several failed attempts to legalise software
> patents in Europe, the patent establishment changed its strategy.
> Instead of explicitly seeking to sanction the patentability of
> software, they are now seeking to create a central European patent
> court, which would establish and enforce patentability rules in their
> favor, without any possibility of correction by competing courts or
> democratically elected legislators."
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>
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Re: [zeromq-dev] FOSDEM 2020 ZeroMQ gathering/meetup/hackaton/knitting club on Monday 3rd and Tuesday 4th February 2020

[Ivan Serdyuk]

Sounds good.
I wouldn't be there - but you could discuss which proposals worth
submitting to https://fwdays.com/en/event/dotnet-fwdays-2020 , for a matter
of covering .NET bindings (C#; F#).
Ivan

On Fri, Aug 23, 2019 at 6:54 PM Luca Boccassi 
wrote:

> On Sun, 2019-08-11 at 11:54 +0100, Luca Boccassi wrote:
> > Hello all,
> >
> > It's that time of the year again - well, almost.
> >
> > The dates for FOSDEM 2020 have been announced - 1st and 2nd of
> > February.
> >
> > Shall we organize the usual ZeroMQ meetup?
> >
> > https://fosdem.org/2020/news/2019-08-11-dates-fosdem-2020/
>
> Hi,
>
> Here's the event page:
>
>
> http://wiki.zeromq.org/event:zeromq-post-fosdem-hackaton-mon-3-tue-4-feb-2020
>
> The event is free as usual, but it would be nice if folks registered on
> the event page or by replying via email here so that we have an idea of
> how many to expect. As usual please feel free to list topics you'd like
> to discuss/hack/work on.
>
> I'll register it as a FOSDEM fringe event as usual for visibility.
>
> It's a long way out but already can't wait!
>
> --
> Kind regards,
> Luca Boccassi
> ___
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> zeromq-dev@lists.zeromq.org
> https://lists.zeromq.org/mailman/listinfo/zeromq-dev
>
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Re: [zeromq-dev] Limited UDP Message Size

[Greg Young]

The maximum UDP packet size is 2 ^ 16.

You definitely do not want it set at MAX_INT.

On Fri, Jan 10, 2020 at 8:24 AM Stephan Opfer 
wrote:

> Hi all,
>
> since 2016 there is this issue
> (https://github.com/zeromq/libzmq/issues/2009) about some limitations of
> the udp_engine in libzmq.
>
> Is it possible that someone at least will increase the "#define
> MAX_UDP_MSG 8192" in libzmq/src/udp_engine.hpp to some reasonable value?
> For example "ZMQ_MAX_MSGSZ" from the zmq context option, which is MAX_INT.
>
> Maybe, someone could spare some time at the Hackathon... ;-)
>
> Greetings,
>
>Stephan
>
> --
> Distributed Systems Research Group
> Stephan Opfer  T. +49 561 804-6279  F. +49 561 804-6277
> Univ. Kassel,  FB 16,  Wilhelmshöher Allee 73,  D-34121 Kassel
> WWW: http://www.uni-kassel.de/go/vs_stephan-opfer/
>
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>


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Re: [zeromq-dev] Limited UDP Message Size

[Doron Somech]

We can increase it to around 65,000 bytes, however, large UDP packets would
probably be dropped when traveling outside your local area network.
The safe size for the UDP packet to travel outside of the local area
network is around 500 bytes.
If you do want to use large UDP packets on your local area network you
might want to increase the network MTU (jumbo frames) for better delivery.

For example, some AWS instances support 9001 bytes MTU for inter-instance
communication.


On Fri, Jan 10, 2020 at 3:25 PM Stephan Opfer 
wrote:

> Hi all,
>
> since 2016 there is this issue
> (https://github.com/zeromq/libzmq/issues/2009) about some limitations of
> the udp_engine in libzmq.
>
> Is it possible that someone at least will increase the "#define
> MAX_UDP_MSG 8192" in libzmq/src/udp_engine.hpp to some reasonable value?
> For example "ZMQ_MAX_MSGSZ" from the zmq context option, which is MAX_INT.
>
> Maybe, someone could spare some time at the Hackathon... ;-)
>
> Greetings,
>
>Stephan
>
> --
> Distributed Systems Research Group
> Stephan Opfer  T. +49 561 804-6279  F. +49 561 804-6277
> Univ. Kassel,  FB 16,  Wilhelmshöher Allee 73,  D-34121 Kassel
> WWW: http://www.uni-kassel.de/go/vs_stephan-opfer/
>
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> https://lists.zeromq.org/mailman/listinfo/zeromq-dev
>
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Re: [zeromq-dev] FOSDEM 2020 ZeroMQ gathering/meetup/hackaton/knitting club on Monday 3rd and Tuesday 4th February 2020

[Doron Somech]

I'm arriving on Friday morning actually, so if anyone in the city and would
like to hack zeromq (or dafka), let me know.

> Is anyone up for a beer on Saturday or Sunday evening?

Yes, although I'm not drinking beer...

On Sat, Jan 11, 2020 at 8:09 PM Benjamin Henrion  wrote:

>
>
> On Saturday, January 11, 2020, Simon Giesecke 
> wrote:
>
>> Hi,
>>
>> I am still somewhat confused about the location of the hackathon. Does
>> the Hackerspace have a website, or can someone give instructions on how to
>> access it? I don't even know the name of the place...
>>
>
> It's the ground floor of Hugo ´s house.
>
> There is no website (yet).
>
> There is the address on the page.
>
>
>>
>> Is anyone up for a beer on Saturday or Sunday evening?
>>
>
> Sure, i might go to the hsbxl party this year...
>
>
>>
>> Best wishes
>> Simon
>>
>> Luca Boccassi  schrieb am Mi., 8. Jan. 2020,
>> 11:51:
>>
>>> On Wed, 2019-09-04 at 11:01 +0100, Luca Boccassi wrote:
>>> > On Fri, 2019-08-23 at 16:53 +0100, Luca Boccassi wrote:
>>> > > On Sun, 2019-08-11 at 11:54 +0100, Luca Boccassi wrote:
>>> > > > Hello all,
>>> > > >
>>> > > > It's that time of the year again - well, almost.
>>> > > >
>>> > > > The dates for FOSDEM 2020 have been announced - 1st and 2nd of
>>> > > > February.
>>> > > >
>>> > > > Shall we organize the usual ZeroMQ meetup?
>>> > > >
>>> > > > https://fosdem.org/2020/news/2019-08-11-dates-fosdem-2020/
>>> > > >
>>> > > >
>>> > >
>>> > > Hi,
>>> > >
>>> > > Here's the event page:
>>> > >
>>> > >
>>> http://wiki.zeromq.org/event:zeromq-post-fosdem-hackaton-mon-3-tue-4-feb-2020
>>> > >
>>> > >
>>> > >
>>> > > The event is free as usual, but it would be nice if folks
>>> > > registered
>>> > > on
>>> > > the event page or by replying via email here so that we have an
>>> > > idea
>>> > > of
>>> > > how many to expect. As usual please feel free to list topics you'd
>>> > > like
>>> > > to discuss/hack/work on.
>>> > >
>>> > > I'll register it as a FOSDEM fringe event as usual for visibility.
>>> > >
>>> > > It's a long way out but already can't wait!
>>> >
>>> > Hi,
>>> >
>>> > Note that we are changing the event location, from HSXBL to a new
>>> > Hackerspace that is opening this month in the centre of town, see the
>>> > meetup page for latest updates:
>>> >
>>> > https://www.meetup.com/ZeroMQ-FOSDEM-side-event/events/264336737/
>>>
>>> Less than a month to go! Reminder for everybody to book
>>> travel keeping in mind the 0MQ event on Monday/Tuesday :-)
>>>
>>> --
>>> Kind regards,
>>> Luca Boccassi
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>>>
>>
>
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> Benjamin Henrion (zoobab)
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> Web: http://www.zoobab.com
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> in Europe, the patent establishment changed its strategy. Instead of
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