From kirthevasankandasamy at gmail.com  Mon Apr  3 12:12:40 2017
From: kirthevasankandasamy at gmail.com (Kirthevasan Kandasamy)
Date: Mon, 3 Apr 2017 12:12:40 -0400
Subject: Fwd: Thesis Proposal - 4/6/17 - Kirthevasan Kandasamy - Tuning
 Hyper-parameters without Grad Students: Scaling up Bandit Optimisation
In-Reply-To: <3efac583-d00e-d878-515b-249d202ee6b1@cs.cmu.edu>
References: <3efac583-d00e-d878-515b-249d202ee6b1@cs.cmu.edu>
Message-ID: <CAB-GCq7dtKzuYQdQgnKDSVzKL3NFw9z3Wq00HhxiFrSDZPNxPQ@mail.gmail.com>

Hi all,

I'll be proposing this Thursday at noon. Feel free to drop by.

-kirthevasan

Sent from my phone. Please excuse brevity.
---------- Forwarded message ----------
From: "Diane Stidle" <diane+ at cs.cmu.edu>
Date: Mar 27, 2017 14:17
Subject: Thesis Proposal - 4/6/17 - Kirthevasan Kandasamy - Tuning
Hyper-parameters without Grad Students: Scaling up Bandit Optimisation
To: "ml-seminar at cs.cmu.edu" <ML-SEMINAR at cs.cmu.edu>, "zoubin at eng.cam.ac.uk"
<zoubin at eng.cam.ac.uk>
Cc:

*Thesis Proposal*

Date: 4/6/17
Time 12:00pm
Place: 6121 GHC
Speaker: Kirthevasan Kandasamy

Title: Tuning Hyper-parameters without Grad Students: Scaling up Bandit
Optimisation
Abstract:
In many scientific and engineering applications, we are tasked with
optimising a black-box function which is expensive to evaluate due to
computational or economic reasons. In *bandit optimisation*, we
sequentially evaluate a noisy function with the goal of identifying its
optimum in as few evaluations as possible. Some applications include tuning
the hyper-parameters of machine learning algorithms, on-line advertising,
optimal policy selection in robotics and maximum likelihood inference in
simulation based scientific models. Today, these problems face new
challenges due to increasingly expensive evaluations and the need to
perform these tasks in high dimensional spaces. At the same time, there are
new opportunities that have not been exploited before. We may have the
flexibility to approximate the expensive function by investing less
resources per evaluation. We can also carry out several evaluations
simultaneously, say via parallel computing or by concurrently conducting
multiple experiments in the real world. In this thesis, we aim to tackle
these and several other challenges to meet emerging demands in large scale
bandit applications. We develop methods with theoretical underpinnings and
which also enjoy good empirical performance.

Thesis Committee:
Barnab?s P?czos (Co-Chair)
Jeff Schneider (Co-Chair)
Aarti Singh
Zoubin Ghahramani (University of Cambridge)

Link to draft document:  cs.cmu.edu/~kkandasa/docs/proposal.pdf
<http://cs.cmu.edu/%7Ekkandasa/docs/proposal.pdf>

-- 
Diane Stidle
Graduate Programs Manager
Machine Learning Department
Carnegie Mellon Universitydiane at cs.cmu.edu412-268-1299 <(412)%20268-1299>
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From kandasamy at cmu.edu  Wed Apr  5 20:05:15 2017
From: kandasamy at cmu.edu (Kirthevasan Kandasamy)
Date: Wed, 5 Apr 2017 20:05:15 -0400
Subject: Fwd: ROOM CHANGE - Thesis Proposal - 4/6/17 - Kirthevasan Kandasamy -
 Tuning Hyper-parameters without Grad Students: Scaling up Bandit
 Optimisation
In-Reply-To: <54f7717b-feaf-cb38-218e-3e5cf8d66eed@cs.cmu.edu>
References: <54f7717b-feaf-cb38-218e-3e5cf8d66eed@cs.cmu.edu>
Message-ID: <CAB-GCq4qOM4XVcBmQNRxqOGucRRBHzn5Ox=hPQK8KBTKaWJoMA@mail.gmail.com>

Hi all,

We changed rooms for the proposal.
It is happening tomorrow at noon at GHC 6115.

samy

---------- Forwarded message ----------
From: Diane Stidle <diane+ at cs.cmu.edu>
Date: Tue, Apr 4, 2017 at 2:03 PM
Subject: ROOM CHANGE - Thesis Proposal - 4/6/17 - Kirthevasan Kandasamy -
Tuning Hyper-parameters without Grad Students: Scaling up Bandit
Optimisation
To: "ml-seminar at cs.cmu.edu" <ML-SEMINAR at cs.cmu.edu>, "zoubin at eng.cam.ac.uk"
<zoubin at eng.cam.ac.uk>


*Thesis Proposal*

Date: 4/6/17
Time 12:00pm
Place: *6115 GHC (Note: Room Change)*
Speaker: Kirthevasan Kandasamy

Title: Tuning Hyper-parameters without Grad Students: Scaling up Bandit
Optimisation
Abstract:
In many scientific and engineering applications, we are tasked with
optimising a black-box function which is expensive to evaluate due to
computational or economic reasons. In *bandit optimisation*, we
sequentially evaluate a noisy function with the goal of identifying its
optimum in as few evaluations as possible. Some applications include tuning
the hyper-parameters of machine learning algorithms, on-line advertising,
optimal policy selection in robotics and maximum likelihood inference in
simulation based scientific models. Today, these problems face new
challenges due to increasingly expensive evaluations and the need to
perform these tasks in high dimensional spaces. At the same time, there are
new opportunities that have not been exploited before. We may have the
flexibility to approximate the expensive function by investing less
resources per evaluation. We can also carry out several evaluations
simultaneously, say via parallel computing or by concurrently conducting
multiple experiments in the real world. In this thesis, we aim to tackle
these and several other challenges to meet emerging demands in large scale
bandit applications. We develop methods with theoretical underpinnings and
which also enjoy good empirical performance.

Thesis Committee:
Barnab?s P?czos (Co-Chair)
Jeff Schneider (Co-Chair)
Aarti Singh
Zoubin Ghahramani (University of Cambridge)

Link to draft document:  cs.cmu.edu/~kkandasa/docs/proposal.pdf
<http://cs.cmu.edu/%7Ekkandasa/docs/proposal.pdf>

-- 
Diane Stidle
Graduate Programs Manager
Machine Learning Department
Carnegie Mellon Universitydiane at cs.cmu.edu412-268-1299 <(412)%20268-1299>
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From predragp at cs.cmu.edu  Wed Apr 12 15:54:44 2017
From: predragp at cs.cmu.edu (Predrag Punosevac)
Date: Wed, 12 Apr 2017 15:54:44 -0400
Subject: ipython2 broken on all servers
In-Reply-To: <D7D7FDCC-82F8-4047-B7DB-F2479985AA2B@andrew.cmu.edu>
References: <D16C1BAC-3304-4A39-8D92-3D7701C516A7@andrew.cmu.edu>
 <D7D7FDCC-82F8-4047-B7DB-F2479985AA2B@andrew.cmu.edu>
Message-ID: <20170412195444.N4akPjdVn%predragp@cs.cmu.edu>

Benedikt Boecking <boecking at andrew.cmu.edu> wrote:

> Ok, I take that back. It does not work for me, but ipython2 worked for Sibi. However, none of us can start new ipython/jupyter notebooks for some reason. Trying to figure out what might be causing it. 
> 

You are not the first one reporting. I do run yum-cron without kernel
updates so it could be that. I will look into it.

Predrag

> 
> 
> > On Apr 12, 2017, at 3:47 PM, Benedikt Boecking <boecking at andrew.cmu.edu> wrote:
> > 
> > Predrag,
> > 
> > Were any updates pushed to the servers midway today? ipython2 does not work anymore (tested on ari, lov3 and lov4 and also had chirag and Sibi test it independently)
> > 
> > - Ben
> > 
> > 
> > 
> 

From predragp at cs.cmu.edu  Wed Apr 12 16:41:12 2017
From: predragp at cs.cmu.edu (Predrag Punosevac)
Date: Wed, 12 Apr 2017 16:41:12 -0400
Subject: ipython2 broken on all servers
In-Reply-To: <20170412195444.N4akPjdVn%predragp@cs.cmu.edu>
References: <D16C1BAC-3304-4A39-8D92-3D7701C516A7@andrew.cmu.edu>
 <D7D7FDCC-82F8-4047-B7DB-F2479985AA2B@andrew.cmu.edu>
 <20170412195444.N4akPjdVn%predragp@cs.cmu.edu>
Message-ID: <20170412204112.Bc-5pggJp%predragp@cs.cmu.edu>

Predrag Punosevac <predragp at cs.cmu.edu> wrote:

> Benedikt Boecking <boecking at andrew.cmu.edu> wrote:
> 
> > Ok, I take that back. It does not work for me, but ipython2 worked for Sibi. However, none of us can start new ipython/jupyter notebooks for some reason. Trying to figure out what might be causing it. 
> > 
> 

I upgraded ipython on all computing nodes. ipython starts for me with
the root account but it will not start with my regular user network
account. That indicates that there is some kind NFS issuep. Somebody
must be heavily writing/reading from the file server or stale NFS file
handles. I would wait a bit to see if the problem resolves by itself.
Obvius "easy" solution would be to clear things by rebooting file server
and computing nodes.

Predrag

> You are not the first one reporting. I do run yum-cron without kernel
> updates so it could be that. I will look into it.
> 
> Predrag
> 
> > 
> > 
> > > On Apr 12, 2017, at 3:47 PM, Benedikt Boecking <boecking at andrew.cmu.edu> wrote:
> > > 
> > > Predrag,
> > > 
> > > Were any updates pushed to the servers midway today? ipython2 does not work anymore (tested on ari, lov3 and lov4 and also had chirag and Sibi test it independently)
> > > 
> > > - Ben
> > > 
> > > 
> > > 
> > 

From predragp at cs.cmu.edu  Mon Apr 17 19:01:25 2017
From: predragp at cs.cmu.edu (Predrag Punosevac)
Date: Mon, 17 Apr 2017 19:01:25 -0400
Subject: LOP1
Message-ID: <20170417230125.zMS6b4eV4%predragp@cs.cmu.edu>

Is back on line after I upgraded 5 servers from OpenBSD 6.0 to 6.1.
Please report anything unusual.

Predrag

From sheath at andrew.cmu.edu  Fri Apr 21 11:08:48 2017
From: sheath at andrew.cmu.edu (Simon Heath)
Date: Fri, 21 Apr 2017 11:08:48 -0400
Subject: bash and lop1 down
Message-ID: <CAGeWgZTwS0Ry5ahjenQZDUGFKHBEkBA5SqnUjb8wEhsHZNOvkg@mail.gmail.com>

Dear all,

It appears that bash.autonlab.org and lop1.autonlab.org are inaccessible.
We're working on it and should have an update within an hour.

Simon+Predrag

-- 
Simon Heath, Research Programmer and Analyst
Robotics Institute - Auton Lab
Carnegie Mellon University
sheath at andrew.cmu.edu
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From sheath at andrew.cmu.edu  Fri Apr 21 11:17:27 2017
From: sheath at andrew.cmu.edu (Simon Heath)
Date: Fri, 21 Apr 2017 11:17:27 -0400
Subject: bash.autonlab.org and lop1.autonlab.org are back up
Message-ID: <CAGeWgZTf2aaagk3RvEUk0ff2GaVSWh6ci211jbVnR+HR4d9hGg@mail.gmail.com>

You should be able to access both systems again.  Please let me know
immediately if you have problems with either of them.

Thanks,
Simon

-- 
Simon Heath, Research Programmer and Analyst
Robotics Institute - Auton Lab
Carnegie Mellon University
sheath at andrew.cmu.edu
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From predragp at cs.cmu.edu  Sat Apr 22 06:55:27 2017
From: predragp at cs.cmu.edu (Predrag Punosevac)
Date: Sat, 22 Apr 2017 06:55:27 -0400
Subject: bash.autonlab.org and lop1.autonlab.org are back up
In-Reply-To: <CAPfEFgfgTmsHyOZdG5AyifGr6WVBQw=5_dE9JMNa9ut-10S5YA@mail.gmail.com>
References: <CAGeWgZTf2aaagk3RvEUk0ff2GaVSWh6ci211jbVnR+HR4d9hGg@mail.gmail.com>
 <CAPfEFgfgTmsHyOZdG5AyifGr6WVBQw=5_dE9JMNa9ut-10S5YA@mail.gmail.com>
Message-ID: <20170422105527.Gu3h7B27V%predragp@cs.cmu.edu>

Michael Andrews <mbandrews at cmu.edu> wrote:

> Hi Simon,
> 
> FYI, it seems to be down again:
> 
> ssh: connect to host lop1.autonlab.org port 22: Connection refused
> 
> Regards,
> Michael

As I expected ldapd daemon died again. I am working with OpenBSD
developers to see why is this happening after the upgrade to 6.1. I am
setting the cron job to regularly restart the daemon. As soon as I get
back to Pittsburgh I will consider downgrading one of LDAP servers to
6.0 which was rock stable.

Predrag

> 
> 
> On Fri, Apr 21, 2017 at 5:17 PM, Simon Heath <sheath at andrew.cmu.edu> wrote:
> 
> > You should be able to access both systems again.  Please let me know
> > immediately if you have problems with either of them.
> >
> > Thanks,
> > Simon
> >
> > --
> > Simon Heath, Research Programmer and Analyst
> > Robotics Institute - Auton Lab
> > Carnegie Mellon University
> > sheath at andrew.cmu.edu
> >

From predragp at cs.cmu.edu  Tue Apr 25 12:24:06 2017
From: predragp at cs.cmu.edu (Predrag Punosevac)
Date: Tue, 25 Apr 2017 12:24:06 -0400
Subject: nvidia-smi not working on gpu1
In-Reply-To: <CA+zL=TJyDXd1x_aXGNe2kR_zc5hpPm83=+8yQfC-_wMXCBCHxg@mail.gmail.com>
References: <CA+zL=TJyDXd1x_aXGNe2kR_zc5hpPm83=+8yQfC-_wMXCBCHxg@mail.gmail.com>
Message-ID: <20170425162406.IMAoHtVF1%predragp@cs.cmu.edu>

Sibi Venkatesan <sibiv at andrew.cmu.edu> wrote:

> Hi Predrag,
> 
> nvidia-smi does not work on gpu1 -- Nick and I have both checked. It gives
> me this issue:
> 
> Failed to initialize NVML: Driver/library version mismatch
> 
> Have others reported this issue?

Sibi,

Simon did reboot the machine which have cleared the error. My initial
hunch was that the driver is too old. We were using older driver on GPU1
due to the fact that newer 8.xxx driver released after September of last
year were braking MATLAB 2016b. The MATLAB 2017a has being released
three weeks ago. I am planning to start upgrading MATLAB in the least
descriptive way, firstly GPU[2-4] which had to use newer NVIDIA driver
due to the compatibility issue with Titan X cards and on which MATLAB
currently is broken with for GPU work. I will then upgrade NVIDIA driver
to the latest following by TensorFlow and Caffe.

Best,
Predrag

> -- 
> 
> - Sibi

From predragp at cs.cmu.edu  Tue Apr 25 12:36:45 2017
From: predragp at cs.cmu.edu (Predrag Punosevac)
Date: Tue, 25 Apr 2017 12:36:45 -0400
Subject: Toner replaced
Message-ID: <20170425163645.6FrUKHugb%predragp@cs.cmu.edu>

If your printer preference is lbro.auton.cs.cmu.edu (the Brother printer
located in the dungeon) I would like to let you know that I just put a
new toner, courtesy of Dr. Dubrawski who is out for $100.

Best,
Predrag 

From sheath at andrew.cmu.edu  Wed Apr 26 10:44:27 2017
From: sheath at andrew.cmu.edu (Simon Heath)
Date: Wed, 26 Apr 2017 10:44:27 -0400
Subject: Auton Lab Code and Coffee, next Thursday at 12:30 pm
Message-ID: <CAGeWgZT13LMP=Tmawpjf_-AxY0X2vN6vtxg9qNWJE6OyU0v_hQ@mail.gmail.com>

Hi all,

I want to try something new, which I call Code and Coffee.  The goal is
basically to be the equivalent of the brainstorming sessions, but oriented
less around what research we're doing and more around what research tools
we're using/developing/wish we had.  I want to do them at least monthly,
maybe weekly if we can manage it, just to get a lot of people together in
the same room to talk about programming.

The first session will be next Thursday at 12:30 PM, in NSH 3001.  Feel
free to bring lunches, and if people want we can pass a hat around and get
a couple pots of actually good coffee.  I will be kicking off by talking
about Collective Mind Data Server, a web service for time-series data
analysis being built by Jarod, Saswati, Anthony and myself.

Simon

-- 
Simon Heath, Research Programmer and Analyst
Robotics Institute - Auton Lab
Carnegie Mellon University
sheath at andrew.cmu.edu
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From db78349 at gmail.com  Wed Apr 26 11:15:27 2017
From: db78349 at gmail.com (David Bayani)
Date: Wed, 26 Apr 2017 11:15:27 -0400
Subject: Auton Lab Code and Coffee, next Thursday at 12:30 pm
In-Reply-To: <CAGeWgZT13LMP=Tmawpjf_-AxY0X2vN6vtxg9qNWJE6OyU0v_hQ@mail.gmail.com>
References: <CAGeWgZT13LMP=Tmawpjf_-AxY0X2vN6vtxg9qNWJE6OyU0v_hQ@mail.gmail.com>
Message-ID: <CAOrEf-Qz9bMFOmKqkqfaQ-+mzxCW+ZsqHkyOvCQtVY1CHM2E2w@mail.gmail.com>

Great idea! I approve!

On Wed, Apr 26, 2017 at 10:44 AM, Simon Heath <sheath at andrew.cmu.edu> wrote:

> Hi all,
>
> I want to try something new, which I call Code and Coffee.  The goal is
> basically to be the equivalent of the brainstorming sessions, but oriented
> less around what research we're doing and more around what research tools
> we're using/developing/wish we had.  I want to do them at least monthly,
> maybe weekly if we can manage it, just to get a lot of people together in
> the same room to talk about programming.
>
> The first session will be next Thursday at 12:30 PM, in NSH 3001.  Feel
> free to bring lunches, and if people want we can pass a hat around and get
> a couple pots of actually good coffee.  I will be kicking off by talking
> about Collective Mind Data Server, a web service for time-series data
> analysis being built by Jarod, Saswati, Anthony and myself.
>
> Simon
>
> --
> Simon Heath, Research Programmer and Analyst
> Robotics Institute - Auton Lab
> Carnegie Mellon University
> sheath at andrew.cmu.edu
>
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From awd at cs.cmu.edu  Wed Apr 26 22:24:12 2017
From: awd at cs.cmu.edu (Artur Dubrawski)
Date: Wed, 26 Apr 2017 22:24:12 -0400
Subject: Auton Lab in the media
Message-ID: <74200d0f-bb31-21ef-6e38-621472924297@cs.cmu.edu>

Heroic work of Emily et al at Marinus, and many Autonians in support, 
have not gone unnoticed:

"This collaboration, along with trend analysis of activity from 
Carnegie-Mellon University, led to 44 human trafficking targets 
generated, two national trafficking networks being identified, and eight 
target packages turned over to law enforcement within a 72-hour period. 
Law enforcement in Houston have already made arrests and freed victims 
based on information gathered during the Super Bowl."

...it is just an excerpt. Check these out for more info:

http://www.dailyinterlake.com/article/20170426/ARTICLE/170429883

http://www.focusonthefamily.com/socialissues/citizen-magazine/changing-the-game/changing-the-game

There is also a new piece about "big data" in food safety to appear in 
the newest edition of Food Technology journal (www.ift.org)
which reflects some of our past and current work on helping make our 
food safer for consumption.

Congrats to everyone involved!

Artur

From sheath at andrew.cmu.edu  Thu Apr 27 11:48:27 2017
From: sheath at andrew.cmu.edu (Simon Heath)
Date: Thu, 27 Apr 2017 11:48:27 -0400
Subject: DNS issues
Message-ID: <CAGeWgZTJVMbT2+DEhNmwfgm1UnwROYVgn4QP=sQyW0FykZRBOQ@mail.gmail.com>

Dear all,

Several people are experiencing intermittent DNS issues.  We are looking
into it and will follow up when we figure out what's going on.

Simon

-- 
Simon Heath, Research Programmer and Analyst
Robotics Institute - Auton Lab
Carnegie Mellon University
sheath at andrew.cmu.edu
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From sheath at andrew.cmu.edu  Fri Apr 28 11:47:24 2017
From: sheath at andrew.cmu.edu (Simon Heath)
Date: Fri, 28 Apr 2017 11:47:24 -0400
Subject: Auton Lab Code and Coffee, next Thursday at 12:30 pm
In-Reply-To: <CAOrEf-Qz9bMFOmKqkqfaQ-+mzxCW+ZsqHkyOvCQtVY1CHM2E2w@mail.gmail.com>
References: <CAGeWgZT13LMP=Tmawpjf_-AxY0X2vN6vtxg9qNWJE6OyU0v_hQ@mail.gmail.com>
 <CAOrEf-Qz9bMFOmKqkqfaQ-+mzxCW+ZsqHkyOvCQtVY1CHM2E2w@mail.gmail.com>
Message-ID: <CAGeWgZSQvTBZKh0i3a9R71U23g5O_ciV63aEDwzSQG-Z7s91-A@mail.gmail.com>

Jeishi had a great idea, which is to actually make a wiki page about this.
So I made one here:
https://www.autonlab.org/private/intranet/code_and_coffee

Feel free to edit it and add stuff.

Simon

On Wed, Apr 26, 2017 at 11:15 AM, David Bayani <db78349 at gmail.com> wrote:

> Great idea! I approve!
>
> On Wed, Apr 26, 2017 at 10:44 AM, Simon Heath <sheath at andrew.cmu.edu>
> wrote:
>
>> Hi all,
>>
>> I want to try something new, which I call Code and Coffee.  The goal is
>> basically to be the equivalent of the brainstorming sessions, but oriented
>> less around what research we're doing and more around what research tools
>> we're using/developing/wish we had.  I want to do them at least monthly,
>> maybe weekly if we can manage it, just to get a lot of people together in
>> the same room to talk about programming.
>>
>> The first session will be next Thursday at 12:30 PM, in NSH 3001.  Feel
>> free to bring lunches, and if people want we can pass a hat around and get
>> a couple pots of actually good coffee.  I will be kicking off by talking
>> about Collective Mind Data Server, a web service for time-series data
>> analysis being built by Jarod, Saswati, Anthony and myself.
>>
>> Simon
>>
>> --
>> Simon Heath, Research Programmer and Analyst
>> Robotics Institute - Auton Lab
>> Carnegie Mellon University
>> sheath at andrew.cmu.edu
>>
>
>


-- 
Simon Heath, Research Programmer and Analyst
Robotics Institute - Auton Lab
Carnegie Mellon University
sheath at andrew.cmu.edu
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From db78349 at gmail.com  Fri Apr 28 11:49:39 2017
From: db78349 at gmail.com (David Bayani)
Date: Fri, 28 Apr 2017 11:49:39 -0400
Subject: Auton Lab Code and Coffee, next Thursday at 12:30 pm
In-Reply-To: <CAGeWgZSQvTBZKh0i3a9R71U23g5O_ciV63aEDwzSQG-Z7s91-A@mail.gmail.com>
References: <CAGeWgZT13LMP=Tmawpjf_-AxY0X2vN6vtxg9qNWJE6OyU0v_hQ@mail.gmail.com>
 <CAOrEf-Qz9bMFOmKqkqfaQ-+mzxCW+ZsqHkyOvCQtVY1CHM2E2w@mail.gmail.com>
 <CAGeWgZSQvTBZKh0i3a9R71U23g5O_ciV63aEDwzSQG-Z7s91-A@mail.gmail.com>
Message-ID: <CAOrEf-RSF0ND0S6Z7AJBwD522GTAdU9hnQ8603vVfLgMTB=F4Q@mail.gmail.com>

Great!

On Fri, Apr 28, 2017 at 11:47 AM, Simon Heath <sheath at andrew.cmu.edu> wrote:

> Jeishi had a great idea, which is to actually make a wiki page about
> this.  So I made one here: https://www.autonlab.org/
> private/intranet/code_and_coffee
>
> Feel free to edit it and add stuff.
>
> Simon
>
> On Wed, Apr 26, 2017 at 11:15 AM, David Bayani <db78349 at gmail.com> wrote:
>
>> Great idea! I approve!
>>
>> On Wed, Apr 26, 2017 at 10:44 AM, Simon Heath <sheath at andrew.cmu.edu>
>> wrote:
>>
>>> Hi all,
>>>
>>> I want to try something new, which I call Code and Coffee.  The goal is
>>> basically to be the equivalent of the brainstorming sessions, but oriented
>>> less around what research we're doing and more around what research tools
>>> we're using/developing/wish we had.  I want to do them at least monthly,
>>> maybe weekly if we can manage it, just to get a lot of people together in
>>> the same room to talk about programming.
>>>
>>> The first session will be next Thursday at 12:30 PM, in NSH 3001.  Feel
>>> free to bring lunches, and if people want we can pass a hat around and get
>>> a couple pots of actually good coffee.  I will be kicking off by talking
>>> about Collective Mind Data Server, a web service for time-series data
>>> analysis being built by Jarod, Saswati, Anthony and myself.
>>>
>>> Simon
>>>
>>> --
>>> Simon Heath, Research Programmer and Analyst
>>> Robotics Institute - Auton Lab
>>> Carnegie Mellon University
>>> sheath at andrew.cmu.edu
>>>
>>
>>
>
>
> --
> Simon Heath, Research Programmer and Analyst
> Robotics Institute - Auton Lab
> Carnegie Mellon University
> sheath at andrew.cmu.edu
>
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From predragp at cs.cmu.edu  Fri Apr 28 11:51:19 2017
From: predragp at cs.cmu.edu (Predrag Punosevac)
Date: Fri, 28 Apr 2017 11:51:19 -0400
Subject: DNS issues demystified
In-Reply-To: <4836d14887d70e9afdd94c2c7798b61f@imap.srv.cs.cmu.edu>
References: <CAGeWgZTJVMbT2+DEhNmwfgm1UnwROYVgn4QP=sQyW0FykZRBOQ@mail.gmail.com>
 <4836d14887d70e9afdd94c2c7798b61f@imap.srv.cs.cmu.edu>
Message-ID: <20170428155119.ZsBT5_u2s%predragp@cs.cmu.edu>

Dear Autonians,

I got to the bottom of DNS/OpenVPN issue. As I suspected the CMU network
guys have being upgrading backplane on the switches.  The CMU switches
are now passing packets at the speeds of 20 Gigabit/s.

Best,
Predrag

Predrag Punosevac <predragp at imap.srv.cs.cmu.edu> wrote:

> On 2017-04-27 11:48, Simon Heath wrote:
> > Dear all,
> > 
> > Several people are experiencing intermittent DNS issues.  We are
> > looking into it and will follow up when we figure out what's going on.
> > 
> > Simon
> > 
> 
> DNS issue on desktops seems to be resolved at this point.I restarted 
> OpenVPN
> server which also serves as the DNS resolver for desktops. It is not 
> clear
> to me (even after going through log files) what caused the problem 
> (OpenVPN
> connection between desktops and the main firewall/OpenVPN server being a 
> prime suspect).
> People who were trying to access computing nodes from the 
> lop1.autonlab.org
> never experienced any problems which is another pointer to OpenVPN 
> server.
> 
> I did physically inspect the server and made sure that cables OK. I was 
> unable
> to locate Matt Nickelson (CS CMU network guy) which is kind a bad sign 
> as
> he had lots issues yesterday with his switches. I am continue to monitor 
> the situation
> and I am ready to act.
> 
> Best,
> Predrag
> 
> > --
> > 
> >  Simon Heath, Research Programmer and Analyst
> > Robotics Institute - Auton Lab
> > Carnegie Mellon University
> > sheath at andrew.cmu.edu