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From: Pindar Wong <pindar.wong@gmail.com>
To: Byron Gibson <byron@mirror.co>
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Subject: Re: [bitcoin-dev] Bitcoin network simulation testing?
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Byron: I'd be interested to collaborate on this in some fashion.
p.
On Sat, Oct 10, 2015 at 1:11 AM, Byron Gibson via bitcoin-dev <
bitcoin-dev@lists.linuxfoundation.org> wrote:
> Thanks Nina and Andrew, I may have the capability to run a simulator large
> scale on many nodes on AWS/GCE, but am looking to optimize the ROI by
> selecting categories of experiments that benefit from a more controlled
> environment, rather than be invalidated by its divergence/s from livenet.
> But wondering if anyone else has already been doing this, would be nice to
> collaborate.
>
> Byron Gibson
> CoS | http://mirrorx.com/
> https://onename.io/bgibson
> https://keybase.io/byrongibson
>
>
> On Oct 6, 2015 14:00, "Andrew Miller" <amiller@cs.umd.edu> wrote:
>
>> Shadow uses virtual time, entirely decoupled from real time. So while it
>> may slow down your machine, this would not affect the stats collected
>>
>> (although it does make shadow somewhat unpleasant to run, unless you have
>> a fast machine, compared to abstract simulators that avoid running the
>> actual Bitcoin code).
>> Hi Byron,
>>
>> I've been using shadow a bit-- I think these simulators are important for
>> testing, but Shadow, at least, certainly seems to have limitations, in some
>> crucial respects. Running shadow w Tor (which is only logical, because
>> many BCT transactions transpire over Tor) is not as 'light' as presented
>> and slows my own box down quite a bit, so the stats can't possibly be
>> accurate... I don't know if this answers any questions or if you've had
>> this experience at all -- perhaps it is negligible on a more powerful
>> machine than my own-- or perhaps there is an adjustment still unaccounted?
>>
>> Regards,
>> Nina K
>>
>> Sent from my iPhone
>>
>> On Oct 4, 2015, at 2:04 PM, Byron Gibson via bitcoin-dev <
>> bitcoin-dev@lists.linuxfoundation.org> wrote:
>>
>> Hi all, is anyone using simulators like Shadow (https://shadow.github.io),
>> BTCSim (https://github.com/btcsuite/btcsim), etc. to test proposed
>> changes to Bitcoin? I have a few questions about their capabilities and
>> limitations.
>>
>> Byron Gibson
>> http://mirror.co/
>> https://keybase.io/byrongibson
>>
>>
>>
>> _______________________________________________
>> bitcoin-dev mailing list
>> bitcoin-dev@lists.linuxfoundation.org
>> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>>
>>
>> _______________________________________________
>> bitcoin-dev mailing list
>> bitcoin-dev@lists.linuxfoundation.org
>> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>>
>>
> _______________________________________________
> bitcoin-dev mailing list
> bitcoin-dev@lists.linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>
>
--e89a8f83a2f721d8a20521b332e8
Content-Type: text/html; charset=UTF-8
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<div dir=3D"ltr"><div>Byron: I'd be interested to collaborate on this i=
n some fashion.<br><br></div>p.<br><br></div><div class=3D"gmail_extra"><br=
><div class=3D"gmail_quote">On Sat, Oct 10, 2015 at 1:11 AM, Byron Gibson v=
ia bitcoin-dev <span dir=3D"ltr"><<a href=3D"mailto:bitcoin-dev@lists.li=
nuxfoundation.org" target=3D"_blank">bitcoin-dev@lists.linuxfoundation.org<=
/a>></span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:=
0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p dir=3D"ltr">Than=
ks Nina and Andrew, I may have the capability to run a simulator large scal=
e on many nodes on AWS/GCE, but am looking to optimize the ROI by selecting=
categories of experiments that benefit from a more controlled environment,=
rather than be invalidated by its divergence/s from livenet.=C2=A0 But won=
dering if anyone else has already been doing this, would be nice to collabo=
rate.<br></p>
<p dir=3D"ltr">Byron Gibson<br>
CoS |=C2=A0<a href=3D"http://mirrorx.com/" target=3D"_blank">http://mirrorx=
.com/</a><br>
<a href=3D"https://onename.io/bgibson" target=3D"_blank">https://onename.io=
/bgibson</a><br>
<a href=3D"https://keybase.io/byrongibson" target=3D"_blank">https://keybas=
e.io/byrongibson</a></p><div class=3D"HOEnZb"><div class=3D"h5">
<p dir=3D"ltr">=C2=A0=C2=A0=C2=A0</p>
<div class=3D"gmail_quote">On Oct 6, 2015 14:00, "Andrew Miller" =
<<a href=3D"mailto:amiller@cs.umd.edu" target=3D"_blank">amiller@cs.umd.=
edu</a>> wrote:<br type=3D"attribution"><blockquote class=3D"gmail_quote=
" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><=
p dir=3D"ltr">Shadow uses virtual time, entirely decoupled from real time. =
So while it may slow down your machine, this would not affect the stats col=
lected</p>
<p dir=3D"ltr"> (although it does make shadow somewhat unpleasant to run, u=
nless you have a fast machine,=C2=A0 compared to abstract simulators that a=
void running the actual Bitcoin code).</p>
<div style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex=
"><div dir=3D"auto"><div>Hi Byron,=C2=A0</div><div><br></div><div>I've =
been using shadow a bit-- I think these simulators are important for testin=
g, but Shadow, at least, certainly seems to have limitations, in some cruci=
al respects.=C2=A0 Running shadow w Tor (which is only logical, because man=
y BCT transactions transpire over Tor) is not as 'light' as present=
ed and slows my own box down quite a bit, so the stats can't possibly b=
e accurate... I don't know if this answers any questions or if you'=
ve had this experience at all -- perhaps it is negligible on a more powerfu=
l machine than my own-- or perhaps there is an adjustment still unaccounted=
?</div><div><br></div><div>Regards,</div><div>Nina K</div><div><br>Sent fro=
m my iPhone</div><div><br>On Oct 4, 2015, at 2:04 PM, Byron Gibson via bitc=
oin-dev <<a href=3D"mailto:bitcoin-dev@lists.linuxfoundation.org" target=
=3D"_blank">bitcoin-dev@lists.linuxfoundation.org</a>> wrote:<br><br></d=
iv><blockquote type=3D"cite"><div><p dir=3D"ltr">Hi all, is anyone using si=
mulators like Shadow (<a href=3D"https://shadow.github.io" target=3D"_blank=
">https://shadow.github.io</a>), BTCSim (<a href=3D"https://github.com/btcs=
uite/btcsim" target=3D"_blank">https://github.com/btcsuite/btcsim</a>), etc=
. to test proposed changes to Bitcoin?=C2=A0 I have a few questions about t=
heir capabilities and limitations.<br></p>
<p dir=3D"ltr">Byron Gibson<br>
<a href=3D"http://mirror.co/" target=3D"_blank">http://mirror.co/</a><br>
<a href=3D"https://keybase.io/byrongibson" target=3D"_blank">https://keybas=
e.io/byrongibson</a><br></p>
<p dir=3D"ltr">=C2=A0=C2=A0=C2=A0 </p>
</div></blockquote><blockquote type=3D"cite"><div><span>___________________=
____________________________</span><br><span>bitcoin-dev mailing list</span=
><br><span><a href=3D"mailto:bitcoin-dev@lists.linuxfoundation.org" target=
=3D"_blank">bitcoin-dev@lists.linuxfoundation.org</a></span><br><span><a hr=
ef=3D"https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev" targe=
t=3D"_blank">https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev=
</a></span><br></div></blockquote></div><br>_______________________________=
________________<br>
bitcoin-dev mailing list<br>
<a href=3D"mailto:bitcoin-dev@lists.linuxfoundation.org" target=3D"_blank">=
bitcoin-dev@lists.linuxfoundation.org</a><br>
<a href=3D"https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev" =
rel=3D"noreferrer" target=3D"_blank">https://lists.linuxfoundation.org/mail=
man/listinfo/bitcoin-dev</a><br>
<br></div>
</blockquote></div>
</div></div><br>_______________________________________________<br>
bitcoin-dev mailing list<br>
<a href=3D"mailto:bitcoin-dev@lists.linuxfoundation.org">bitcoin-dev@lists.=
linuxfoundation.org</a><br>
<a href=3D"https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev" =
rel=3D"noreferrer" target=3D"_blank">https://lists.linuxfoundation.org/mail=
man/listinfo/bitcoin-dev</a><br>
<br></blockquote></div><br></div>
--e89a8f83a2f721d8a20521b332e8--
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