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Re: Teleconference System Failure and Mitigation (post mortem)

From: Kim Hamilton <kimdhamilton@gmail.com>
Date: Sat, 19 Sep 2020 20:27:36 -0700
Message-ID: <CAFmmOzfQaKC1K98zCMSs8fjcjov_fX3Y8t2ZDpkQZ1orCCDLXA@mail.gmail.com>
To: Wayne Chang <wyc@fastmail.fm>
Cc: "John, Anil" <anil.john@hq.dhs.gov>, Manu Sporny <msporny@digitalbazaar.com>, W3C Credentials CG <public-credentials@w3.org>
Can someone did:meme this?

On Sat, Sep 19, 2020 at 7:34 PM Wayne Chang <wyc@fastmail.fm> wrote:

>
>
> On Sat, Sep 19, 2020, at 10:29 AM, John, Anil wrote:
> > >When the presenter started broadcasting video, the default is to
> broadcast in the highest definition possible
> > >which means the server started doing around 300Mbps in video streams to
> everyone and only had enough
> > >memory to cache around 5 seconds of video before running out of memory
> >
> > As said presenter, I was happy to informally red team your defaults,
> > assumptions and expectations :-)
> >
> > Best Regards,
> >
> > Anil
> >
> > Anil John
> > Technical Director, Silicon Valley Innovation Program
> > Science and Technology Directorate
> > US Department of Homeland Security
> > Washington, DC, USA
> >
> > Email Response Time – 24 Hours
> >
> > -----Original Message-----
> > From: Manu Sporny <msporny@digitalbazaar.com>
> > Sent: Saturday, September 19, 2020 9:59 AM
> > To: public-credentials@w3.org
> > Subject: Teleconference System Failure and Mitigation (post mortem)
> >
> > CAUTION: This email originated from outside of DHS. DO NOT click links
> > or open attachments unless you recognize and/or trust the sender.
> > Contact your component SOC with questions or concerns.
> >
> >
> > On 9/18/20 7:56 PM, kimdhamilton@gmail.com wrote:
> > > TL;DR: NEW AND IMPROVED JITSI, FEATURING MORE RAM.
> >
> > For those of you that were on last weeks call, we experienced a hard
> > lock-up on the W3C CCG teleconferencing system. Here's what we believe
> > happened:
> >
> > 1. We had sized the server to optimize for costs, which meant
> >    we only allocated 4GBs of RAM.
> > 2. We tested this configuration with around 25 people connected
> >    simultaneously, all broadcasting video. The server was
> >    stable at ~60% memory usage. We thought we were good.
> > 3. The call last week had 37 people at its peak. We were good
> >    for the first 30 minutes or so.
> > 4. When the presenter started broadcasting video, the default
> >    is to broadcast in the highest definition possible, which
> >    means the server started doing around 300Mbps in video
> >    streams to everyone and only had enough memory to cache
> >    around 5 seconds of video before running out of memory. We
> >    went outside of that envelope, the server locked up hard,
> >    and that was that. We switched over to Zoom and continued
> >    the meeting with about 5 minutes of downtime.
> >
> > We have done the following in an attempt to prevent this from happening
> > again:
> >
> > 1. Doubled the amount of RAM on the server to 8GB.
> > 2. Added a 16GB swap volume in case we exceed the RAM
> >    allocated to the machine.
> >
> > We believe this should address the issue experienced during the last
> call.
> >
> > Running in production is the ultimate test on your system design
> assumptions. :)
> >
> > -- manu
> >
> > --
> > Manu Sporny -
> >
> https://urldefense.us/v2/url?u=https-3A__www.linkedin.com_in_manusporny_&d=DwICaQ&c=2plI3hXH8ww3j2g8pV19QHIf4SmK_I-Eol_p9P0CttE&r=FUgYmx6LTIaPqn7QR6TBfzml-fqCTpab-djgqlCFtgU&m=HBdDEjrS5CAHaTYUE2BvfrdkKFX6koyF-CId_SXApKI&s=vYOHxA8gBJa371Zit59Ub-lVIWk-yTlVQFz9gg4M2Jo&e=
> > Founder/CEO - Digital Bazaar, Inc.
> > blog: Veres One Decentralized Identifier Blockchain Launches
> >
> https://urldefense.us/v2/url?u=https-3A__tinyurl.com_veres-2Done-2Dlaunches&d=DwICaQ&c=2plI3hXH8ww3j2g8pV19QHIf4SmK_I-Eol_p9P0CttE&r=FUgYmx6LTIaPqn7QR6TBfzml-fqCTpab-djgqlCFtgU&m=HBdDEjrS5CAHaTYUE2BvfrdkKFX6koyF-CId_SXApKI&s=tGgIHOKJJqDl7xVVIZsJiKg8_yH0TiPWsi2KoLzm0NY&e=
> >
> >
>

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Received on Sunday, 20 September 2020 03:28:03 UTC

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