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Matthew Oliver: Posfix – Making sense of delays in mail

Sat, 2014-11-01 05:26

The maillog

The maillog is easy enough to follow, but when you understand what all the delay and delays numbers mean then this may help really understand what is going on!

A standard email entry in postfix looks like:

Jan 10 10:00:00 testmtr postfix/smtp[20123]: 34A1B160852B: to=, relay=mx1.example.lan[]:25, delay=0.49, delays=0.2/0/0.04/0.25, dsn=2.0.0, status=sent

Pretty straight forward: date, email identifier in the mailq (34A1B160852B), recipient, which server the email is being sent to (relay). It is the delay and delays I’d like to talk about.

Delay and Delays

If we take a look at the example email from above:

Jan 10 10:00:00 testmtr postfix/smtp[20123]: 34A1B160852B: to=, relay=mx1.example.lan[]:25, delay=0.49, delays=0.2/0/0.04/0.25, dsn=2.0.0, status=sent

The delay parameter (delay=0.49) is fairly self explanatory, it is the total amount of time this email (34A1B160852B) has been on this server. But what is the delays parameter all about?


NOTE: Numbers smaller than 0.01 seconds are truncated to 0, to reduce the noise level in the logfile.

You might have guessed it is a break down of the total delay, but what do each number represent?

Well from the release notes we get:


a=time before queue manager, including message transmission;

b=time in queue manager;

c=connection setup time including DNS, HELO and TLS;

d=message transmission time.

There for looking at our example:

  • a (0.2): The time before getting to the queue manager, so the time it took to be transmitted onto the mail server and into postfix.
  • b (0): The time in queue manager, so this email didn’t hit the queues, so it was emailed straight away.
  • c (0.04): The time it took to set up a connection with the destination mail relay.
  • d (0.25): The time it took to transmit the email to the destination mail relay.

However if the email is deferred, then when the email is attempted to be sent again:

Jan 10 10:00:00 testmtr postfix/smtp[20123]: 34A1B160852B: to=, relay=mx1.example.lan[]:25, delay=82, delays=0.25/0/0.5/81, dsn=4.4.2, status=deferred (lost connection with mx1.example.lan[] while sending end of data -- message may be sent more than once)

Jan 10 testmtr postfix/smtp[20123]: 34A1B160852B: to=, relay=mx1.example.lan[]:25, delay=1092, delays=1091/0.2/0.8/0.25, dsn=2.0.0, status=sent

This time the first entry shows how long it took before the destination mail relay took to time out and close the connection:


Therefore: 81 seconds.

The email was deferred then about 15 minutes later (1009 seconds [delays - <total delay from last attempt> ]) another attempt is made.

This time the delay is a lot larger, as the total time this email has spent on the server is a lot longer.

delay=1092, delays=1091/0.2/0.8/0.25

What is interesting though is the value of ‘a’ is now 1091, which means when an email is resent the ‘a’ value in the breakdown also includes the amount of time this email has currently spend on the system (before this attempt).

So there you go, those delays values are rather interesting and can really help solve where bottlenecks lie on your system. In the above case we obviously had some problem communicating to the destination mail relay, but worked the second time, so isn’t a problem with our system… or so I’d like to think.

Matthew Oliver: Use xmllint and vim to format xml documents

Sat, 2014-11-01 05:26

If you want vim to nicely format an XML file (and a xena file in this example, 2nd line) then add this to your ~/.vimrc file:

" Format *.xml and *.xena files by sending them to xmllint

au FileType xml exe ":silent 1,$!xmllint --format --recover - 2>/dev/null"

au FileType xena exe ":silent 1,$!xmllint --format --recover - 2>/dev/null"

This uses the xmllint command to format the xml file.. useful on xml docs that aren’t formatted in the file.

Matthew Oliver: Debian 6 GNU/KFreeBSD Grub problems on VirtualBox

Sat, 2014-11-01 05:26

Debian 6 was released the other day, with this release they not only released a Linux kernel version but they now support a FreeBSD version as well!

So I decided to install it under VirtualBox and check it out…

The install process went smoothly until I got to the end when it was installing and setting up grub2. It installed ok on the MBR but got an error in the installer while trying to set it up. I jumped into the console to take a look around.

I started off trying to run the update-grub command which fails silently (checking $? shows the return code of 1). On closer inspection I noticed the command created an incomplete grub config named /boot/grub/

So all we need to do is finish off this config file. So jump back into the installer and select continue without boot loader, this will pop up a message about what you must set the root partition as when you do set up a boot loader, so take note of it.. mine was /dev/ad0s5.

OK, with that info we can finish off our config file. Firstly lets rename the incomplete one:

cp /boot/grub/ /boot/grub/grub.cfg

Now my /boot/grub/grub.cfg ended like:

### BEGIN /etc/grub.d/10_kfreebsd ###

menuentry 'Debian GNU/kFreeBSD, with kFreeBSD 8.1-1-amd64' --class debian --class gnu-kfreebsd --class gnu --class os {

insmod part_msdos

insmod ext2

set root='(hd0,1)'

search --no-floppy --fs-uuid --set dac05f8a-2746-4feb-a29d-31baea1ce751

echo 'Loading kernel of FreeBSD 8.1-1-amd64 ...'

kfreebsd /kfreebsd-8.1-1-amd64.gz

So I needed to add the following to finish it off (note this I’ll repeat that last part):

### BEGIN /etc/grub.d/10_kfreebsd ###

menuentry 'Debian GNU/kFreeBSD, with kFreeBSD 8.1-1-amd64' --class debian --class gnu-kfreebsd --class gnu --class os {

insmod part_msdos

insmod ext2

insmod ufs2

set root='(hd0,1)'

search --no-floppy --fs-uuid --set dac05f8a-2746-4feb-a29d-31baea1ce751

echo 'Loading kernel of FreeBSD 8.1-1-amd64 ...'

kfreebsd /kfreebsd-8.1-1-amd64.gz

set kFreeBSD.vfs.root.mountfrom=ufs:/dev/ad0s5

set kFreeBSD.vfs.root.mountfrom.options=rw


Note: My root filesytem was UFS, thus the ‘ufs:/dev/ad0s5′ in the mountfrom option.

That’s it, you Debian GNU/kFreeBSD should now boot successfully

Russell Coker: Links October 2014

Sat, 2014-11-01 01:26

The Verge has an interesting article about Tim Cook (Apple CEO) coming out [1]. Tim says “if hearing that the CEO of Apple is gay can help someone struggling to come to terms with who he or she is, or bring comfort to anyone who feels alone, or inspire people to insist on their equality, then it’s worth the trade-off with my own privacy”.

Graydon2 wrote an insightful article about the right-wing libertarian sock-puppets of silicon valley [2].

George Monbiot wrote an insightful article for The Guardian about the way that double-speak facilitates killing people [3]. He is correct that the media should hold government accountable for such use of language instead of perpetuating it.

Anne Thériault wrote an insightful article for Vice about the presumption of innocence and sex crimes [4].

Dr Nerdlove wrote an interesting article about Gamergate as the “extinction burst” of “gamer culture” [5], we can only hope.

Shweta Narayan wrote an insightful article about Category Structure and Oppression [6]. I can’t summarise it because it’s a complex concept, read the article.

Some Debian users who don’t like Systemd have started a “Debian Fork” project [7], which so far just has a web site and nothing else. I expect that they will never write any code. But it would be good if they did, they would learn about how an OS works and maybe they wouldn’t disagree so much with the people who have experience in developing system software.

A GamerGate terrorist in Utah forces Anita Sarkeesian to cancel a lecture [8]. I expect that the reaction will be different when (not if) an Islamic group tries to get a lecture cancelled in a similar manner.

Model View Culture has an insightful article by Erika Lynn Abigail about Autistics in Silicon Valley [9].

Katie McDonough wrote an interesting article for Salon about Ed Champion and what to do about men who abuse women [10]. It’s worth reading that while thinking about the FOSS community…

Related posts:

  1. Links September 2014 Matt Palmer wrote a short but informative post about enabling...
  2. Links July 2014 Dave Johnson wrote an interesting article for Salon about companies...
  3. Links August 2014 Matt Palmer wrote a good overview of DNSSEC [1]. Sociological...

Russell Coker: Samsung Galaxy Note 3

Sat, 2014-11-01 00:26

In June last year I bought a Samsung Galaxy Note 2 [1]. Generally I was very happy with that phone, one problem I had is that less than a year after purchasing it the Ingress menus burned into the screen [2].

2 weeks ago I bought a new Galaxy Note 3. One of the reasons for getting it is the higher resolution screen, I never realised the benefits of a 1920*1080 screen on a phone until my wife got a Nexus 5 [3]. I had been idly considering a Galaxy Note 4, but $1000 is a lot of money to pay for a phone and I’m not sure that a 2560*1440 screen will offer much benefit in that size. Also the Note 3 and Note 4 both have 3G of RAM, as some applications use more RAM when you have a higher resolution screen the Note 4 will effectively have less usable RAM than the Note 3.

My first laptop cost me $3,800 in 1998, that’s probably more than $6,000 in today’s money. The benefits that I receive now from an Android phone are in many ways greater than I received from that laptop and that laptop was definitely good value for money for me. If the cheapest Android phone cost $6,000 then I’d pay that, but given that the Note 3 is only $550 (including postage) there’s no reason for me to buy something more expensive.

Another reason for getting a new phone is the limited storage space in the Note 2. 16G of internal storage is a limit when you have some big games installed. Also the recent Android update which prevented apps from writing to the SD card meant that it was no longer convenient to put TV shows on my SD card. 32G of internal storage in the Note 3 allows me to fit everything I want (including the music video collection I downloaded with youtube-dl). The Note 2 has 16G of internal storage and an 8G SD card (that I couldn’t fully use due to Android limitations) while the Note 3 has 32G (the 64G version wasn’t on sale at any of the cheap online stores). Also the Note 3 supports an SD card which will be good for my music video collection at some future time, this is a significant benefit over the Nexus 5.

In the past I’ve written about Android service life and concluded that storage is the main issue [4]. So it is a bit unfortunate that I couldn’t get a phone with 64G of storage at a reasonable price. But the upside is that getting a cheaper phone allows me to buy another one sooner and give the old phone to a relative who has less demanding requirements.

In the past I wrote about the warranty support for my wife’s Nexus 5 [5]. I should have followed up on that before, 3 days after that post we received a replacement phone. One good thing that Google does is to reserve money on a credit card to buy the new phone and then send you the new phone before you send the old one back. So if the customer doesn’t end up sending the broken phone they just get billed for the new phone, that avoids excessive delays in getting a replacement phone. So overall the process of Google warranty support is really good, if 2 products are equal in other ways then it would be best to buy from Google to get that level of support.

I considered getting a Nexus 5 as the hardware is reasonably good (not the greatest but quite good enough) and the price is also reasonably good. But one thing I really hate is the way they do the buttons. Having the home button appear on the main part of the display is really annoying. I much prefer the Samsung approach of having a hardware button for home and touch-screen buttons outside the viewable area for settings and back. Also the stylus on the Note devices is convenient on occasion.

The Note 3 has a fake-leather back. The concept of making fake leather is tacky, I believe that it’s much better to make honest plastic that doesn’t pretend to be something that it isn’t. However the texture of the back improves the grip. Also the fake stitches around the edge help with the grip too. It’s tacky but utilitarian.

The Note 3 is slightly smaller and lighter than the Note 2. This is a good technical achievement, but I’d rather they just gave it a bigger battery.

Update USB 3

One thing I initially forgot to mention is that the Note 3 has USB 3. This means that it has a larger socket which is less convenient when you try and plug it in at night. USB 3 seems unlikely to provide any benefit for me as I’ve never had any of my other phones transfer data at rates more than about 5MB/s. If the Note 3 happens to have storage that can handle speeds greater than the 32MB/s a typical USB 2 storage device can handle then I’m still not going to gain much benefit. USB 2 speeds would allow me to transfer the entire contents of a Note 3 in less than 20 minutes (if I needed to copy the entire storage contents). I can’t imagine myself having a real-world benefit from that.

The larger socket means more fumbling when charging my phone at night and it also means that the Note 3 cable can’t be used in any other phone I own. In a year or two my wife will have a phone with USB 3 support and that cable can be used for charging 2 phones. But at the moment the USB 3 cable isn’t useful as I don’t need to have a phone charger that can only charge one phone.


The Note 3 basically does everything I expected of it. It’s just like the Note 2 but a bit faster and with more storage. I’m happy with it.

Related posts:

  1. Samsung Galaxy Note 2 A few weeks ago I bought a new Samsung Galaxy...
  2. Samsung Galaxy S3 First Review with Power Case My new Samsung Galaxy S3 arrived a couple of days...
  3. Samsung Galaxy Camera – a Quick Review I recently had a chance to briefly play with the...

Ben Martin: Terry 2.0 includes ROS!

Fri, 2014-10-31 19:27
What started as a little tinker around the edges has resulted in many parts of Terry being updated. The Intel j1900 motherboard is now mounted in the middle of the largest square structure, and SSD is mounted (the OCZ black drive at the bottom), yet another battery is mounted which is a large external laptop supply, the Kinect is now mounted on the pan and tilt mechanism along with the 1080p webcam that was previously there. The BeagleBone Black is moved to its own piece of channel and a breadboard is sunk into the main 2nd top level channel.

I haven't cabled up the j1900 yet. On the SSD is Ubuntu and ROS including a working DSLAM (strangely some fun and games getting that to compile and then to not segv right away).

I used 3 Actobotics Beams, one IIRC is a 7.7 incher and two shorter ones. The long beam actually lines on for the right side of the motherboard that you see in the image. The beam is attached with nylon bolts and has a 6.6mm standoff between the motherboard and the beam to avoid any undesired electrical shorts. With the two shorter beams on the left side of the motherboard it is rather securely attached to Terry now. The little channel you see on the right side up a little from the bottom is there for the 7.7 inch beam to attach to (behind the motherboard) and there is a shorter beam on this side to secure the floating end of the channel to the base channel.

The alloy structure at the top of the pan and tilt now has a Kinect attached. I used a wall mount plastic adaptor which with great luck and convenience the nut traps lined up to the actobotics holes. I have offset the channel like you see so that the center of gravity is closer to directly above the pan and tilt. Perhaps I will have to add some springs to help the tilt servo when it moves the Kinect back too far from the centre point. I am also considering a counter balance weight below the tilt which would also work to try to stabilize the Kinect at the position shown.

I was originally planning to put some gripper on the front of Terry. But now I'm thinking about using the relatively clean back channel to attach a threaded rod and stepper motor so that the gripper can have access to the ground and also table top. Obviously the cameras would have to rotate 180 degrees to be able to see what the gripper was up to. Also for floor pickups the tilt might have to be able to handle a reasonable downward "look" without being too hard on the servo.

There were also some other tweaks. A 6 volt regulator is now inlined into a servo extension cable and the regulator is itself bolted to some of the channel. Nice cooling, and it means that the other end of that servo extension can take something like 7-15v and it will give the servo the 6v it wants. That is actually using the same battery pack as the drive wheels (8xAA).

One thing that might be handy for others who find this post, the BeagleBone Black Case from sparkfun attaches to Actobotics channel fairly easily. I used two cheesehead m3 nylocks and had to force them into the enclosure. The nylocks lined up to the Actobotics channel and so the attachment was very simple. You'll want a "3 big hole" or more bit of channel to attach the enclosure to. I attached it to a 3 bit holer and then attaced that channel to the top of Terry with a few threaded standoffs. Simplifies attach and remove should that ever be desired.

I know I need slip rings for the two USB cameras up top. And for the tilt servo as well. I can't use a USB hub up top because both the USB devices can fairly well saturate a USB 2.0 bus. I use the hardware encoded mjpeg from the webcam which helps bandwidth, but I'm going to give an entire USB 2.0 bus to the Kinect. News: Keynote Speaker - Professor Eben Moglen

Fri, 2014-10-31 13:27

The LCA 2015 team is honoured to announce our first Keynote speaker - Professor Eben Moglen, Executive Director of the Software Freedom Law Center and professor of Law and Legal History at Columbia University Law School.

Professor Moglen's presentation is scheduled for 09:00 am Tuesday, 13 January 2015

Professor Moglen has represented many of the world's leading free software developers. He earned his PhD in History and his law degree at Yale University during what he sometimes calls his “long, dark period” in New Haven.

After law school he clerked for Judge Edward Weinfeld of the United States District Court in New York City and for Justice Thurgood Marshall of the United States Supreme Court. He has taught at Columbia Law School since 1987 and has held visiting appointments at Harvard University, Tel Aviv University and the University of Virginia.

In 2003 he was given the Electronic Frontier Foundation's Pioneer Award for efforts on behalf of freedom in the electronic society.

We are especially grateful to Michael Davies for his efforts in bringing Professor Moglen to LCA 2015 in Auckland for us - thank you Michael!

The LCA 2015 Auckland Team

Jan Schmidt: 2014 GStreamer Conference

Fri, 2014-10-31 00:26

I’ve been home from Europe over a week, after heading to Germany for the annual GStreamer conference and Linuxcon Europe.

We had a really great turnout for the GStreamer conference this year

as well as an amazing schedule of talks. All the talks were recorded by Ubicast, who got all the videos edited and uploaded in record time. The whole conference is available for viewing at

I gave one of the last talks of the schedule – about my current work adding support for describing and handling stereoscopic (3D) video. That support should land upstream sometime in the next month or two, so more on that in a bit.

There were too many great talks to mention them individually, but I was excited by 3 strong themes across the talks:

  • WebRTC/HTML5/Web Streaming support
  • Improving performance and reducing resource usage
  • Building better development and debugging tools

I’m looking forward to us collectively making progress on all those things and more in the upcoming year.

Andrew Pollock: [life] Day 274: Errands, friends old and new, and swim class

Thu, 2014-10-30 22:25

In researching ways to try and help Zoe sleep for longer, I learned that there's basically two triggers for waking up in the morning: light and heat. Because Queenslanders hate daylight saving, the sun gets up ridiculously early in summer. Because Queensland is hot, it also gets very hot pretty early. Our bedrooms are on the eastern side of the apartment to boot.

I already have nice blackout curtains, and I had pelmets installed last summer to try and reduce the light leakage around the curtains. I also had reflective window film put on our bedroom windows last summer in an effort to reduce the morning heat when the sun rose, but I don't think it's made a massive difference to a closed up bedroom. I think Zoe woke up at about 5:40am this morning. I'm not sure what the room temperature was, because the Twine in her room decided not to log it this morning. Air conditioning is the next thing to try.

After breakfast, we ran a few errands, culminating at a trip to the carwash for babyccino. After that, we headed over to Toowong to pick up Geneal, who was a friend of my biological mother that I've kept in loose contact since I've been an adult. We went over to the Toowong Bowls Club for lunch, and had a nice catch up.

The Toowong Bowls Club has a rather disturbing line on the wall showing the height of the 2011 floods. It's probably taller than my raised arm from the ground level of the building.

After lunch, and dropping Geneal home, we headed over for a play date at the home of Chloe, who will be starting Prep next year at Zoe's school. I met Chloe's Mum, Kelley, at the P&C meeting I went to earlier in the year, and then proceeded to continue to bump into her at numerous school-related things ever since. She's been a good person to know, having an older daughter at the school as well, and has given me lots of advice.

Zoe and Chloe got along really well, and Chloe seems like a nice kid. After the play date, we walked to school to collect Chloe's older sister, and then to swim class. We were early, but Zoe was happy to hang out.

I am just so loving the vibe I'm getting about the school, and really loving the school community itself. I'm really looking forward to the next seven years here.

After swim class, we walked back to Chloe's house to retrieve the car, and say goodbye to Chloe, and headed home. It was another nice full, but not too full day.

Linux Users of Victoria (LUV) Announce: LUV Main November 2014 Meeting: Raspberry Pi update + systemd

Thu, 2014-10-30 12:30
Start: Nov 5 2014 19:00 End: Nov 5 2014 21:00 Start: Nov 5 2014 19:00 End: Nov 5 2014 21:00 Location: 

The Buzzard Lecture Theatre. Evan Burge Building, Trinity College, Melbourne University Main Campus, Parkville.


Please note that the November meeting is on Wednesday night rather than Tuesday night due to the Melbourne Cup.

Alec Clews, Raspberry Pi update

Russell Coker, systemd

The Buzzard Lecture Theatre, Evan Burge Building, Trinity College Main Campus Parkville Melways Map: 2B C5

Notes: Trinity College's Main Campus is located off Royal Parade. The Evan Burge Building is located near the Tennis Courts. See our Map of Trinity College. Additional maps of Trinity and the surrounding area (including its relation to the city) can be found at

Parking can be found along or near Royal Parade, Grattan Street, Swanston Street and College Crescent. Parking within Trinity College is unfortunately only available to staff.

For those coming via Public Transport, the number 19 tram (North Coburg - City) passes by the main entrance of Trinity College (Get off at Morrah St, Stop 12). This tram departs from the Elizabeth Street tram terminus (Flinders Street end) and goes past Melbourne Central Timetables can be found on-line at:

Before and/or after each meeting those who are interested are welcome to join other members for dinner. We are open to suggestions for a good place to eat near our venue. Maria's on Peel Street in North Melbourne is currently the most popular place to eat after meetings.

LUV would like to acknowledge Red Hat for their help in obtaining the Buzzard Lecture Theatre venue and VPAC for hosting, and BENK Open Systems for their financial support of the Beginners Workshops

Linux Users of Victoria Inc., is an incorporated association, registration number A0040056C.

November 5, 2014 - 19:00

read more

Stewart Smith: New libeatmydata release: 105

Thu, 2014-10-30 10:27

Over on the project page and on launchpad you can now download libeatmydata 105.

This release fixes a couple of bugs that came in via the Debian project, including a rather interesting one about some binaries not running .so ctors to properly init libeatmydata and the code path in the libeatmydata open() not really dealing with being called first in this situation.

Enjoy! News: Speaker Feature: Meg Howie, Joshua Hesketh

Thu, 2014-10-30 08:28
Meg Howie Ask Away: Staking Out the Stakeholders

11:35am Friday 16th January 2015

Meg is a designer and thinker whose practice spans graphic, interactive, film, service and performance design. She is currently undertaking a Master of Design at Massey University and her research explores the influence of open source culture and participatory democracy on civic engagement. Meg’s work is deeply social, and draws from human-centred design, behavioural psychology and collaborative modes of working.

For more information on Meg and her presentation, see here. You can follow her as @howiemeg and don’t forget to mention #LCA2015.

Joshua Hesketh Who is Linux Australia?

3:40pm Thursday 15th January 2015

Joshua is a software developer for Rackspace Australia working on upstream OpenStack. He works from his home in Hobart, Tasmania. Joshua is currently President of Linux Australia, previously the co-chair for PyCon Australia and a key organiser for He has an interest in robotics having recently completed a degree in mechatronic engineering. Josh is an active contributor to the openstack-infra and nova projects.

For more information on Josh and his presentation, see here.

Andrew Pollock: [life] Day 273: Kindergarten, more startup stuff, and another Prep day

Wed, 2014-10-29 22:25

I had another busy day today. I've well and truly falled off the running wagon, which I really need to fix rather urgently. I would have liked to have gone for a run this morning, but it didn't happen.

I started off with a chiropractic adjustment, and then a bit of random cooking to use up some perishables, before the cleaners arrived.

While the cleaners were here, I managed to knock over another unit of my real estate course, which I was pretty stoked about. I'll try and get it in the mail tomorrow, and that's the last one from the first half of the course done.

I grabbed a massage, and then headed over to pick up Zoe early from Kindergarten to take her to school for another Prep introduction session. I really like Zoe's school. This year for the first time they're running a four week program where the kids can come for a couple of hours.

Today it was fine and gross motor skills. They divided the group in half, and Zoe's half did fine motor skills first. The kids rotated through three different stations, which all had three or four activities each. Zoe did pretty well with these.

Then the groups swapped over, and we returned to the hall where we started, to do some gross motor skills. I would have thought this would have been right up Zoe's alley, since a lot of it was similar to TumbleTastics, but she was very clingy, and they kept rotating between stations faster than she got warmed up to the activity.

She was a bit overwhelmed in the larger group setting in general. Hopefully next week with a bit of preparation before we come (and no Kindergarten) she'll do better.

After we got home, I showed Zoe a balloon full of water that I'd put in the freezer. She had a great time smashing it on the balcony. I'll have to do that again.

It's a hot night tonight, I hope Zoe sleeps okay. It was definitely time to bust out the fan.

Lev Lafayette: Training and Education in High Performance Computing for eReseachers

Wed, 2014-10-29 11:29

"Big data" requires processing. Processing requires HPC. Increased processing results in increased research output. Research organisations that do not increase HPC usage will fall behind. HPC requires either 'dumb down the interface or skill up the user'. Making "user friendly" interfaces may not be the right path to take as HPC use will always have a minimum level of complexity. Training courses that use andragogical technqiues correlate with increased HPC use.

Presentation to eResearch Australasia, Melbourne, October 28, 2014 News: Speaker Feature: Christoph Lameter, Brandon Philips

Wed, 2014-10-29 08:28
Christoph Lameter SL[AUO]B:Kernel memory allocator design and philosophy

12:15pm Friday 16th January 2015

Christoph specializes in High Performance Computing and High Frequency Trading technologies. As an operating system designer and kernel developer he has been developing memory management technologies for Linux to enhance performance and reduce latencies. He is fond of new technologies and new ways of thinking that disrupt existing industries and causes new development communities to emerge.

For more information on Christoph and his presentation, see here. You can follow him as @qant and don’t forget to mention #lca2015.

Brandon Philips CoreOS: An introduction

11:35 am Friday 16th January 2015

Brandon Philips is helping to build modern Linux server infrastructure at CoreOS. Prior to CoreOS, he worked at Rackspace hacking on cloud monitoring and was a Linux kernel developer at SUSE. In addition to his work at CoreOS, Brandon sits on Docker's governance board and is one of the top contributors to Docker. As a graduate of Oregon State's Open Source Lab he is passionate about open source technologies.

Brandon has also been a speaker at many conferences including Open Source Bridge 2012 and Open Source Conference 2012.

For more information on Brandon and his presentation, see here. You can follow him as @BrandonPhilips and don’t forget to mention #lca2015.

Andrew Pollock: [life] Day 272: Kindergarten, startup stuff

Tue, 2014-10-28 22:25

I had a great, productive day today.

I got stuck into my real estate licence coursework this morning, and finished off a unit. I biked down to the post office to mail it off, and picked up the second half of my coursework. After I finish the unit I started today, I'll have 8 more units to go. Looking at the calendar, if I can punch out a unit a week (which is optimistic, particularly considering that school holidays are approaching) I could be finished by the end of the year. More realistically, I can try to be finished by the time Zoe starts school, which will be perfect, and well inside the 12 month period I'm supposed to get it done in. We shall see how things pan out.

I biked to Kindergarten to pick up Zoe, and she wanted to watch Megan's tennis class for a while, so we hung around. She was pretty wiped out from a water play day at Kindergarten today. We biked home, and then she proceeded to eat everything in the house that wasn't tied down until Sarah arrived to pick her up.

I used the rest of the afternoon to do some more administrative stuff and tidy up a bit, before heading off to my yoga class. I had a really lovely stretch class with just me and my yoga teacher, so we spent the whole class chatting and having a great catch up. It was a great way to end the day.

Andrew Pollock: [life] Day 271: Kindergarten, lots of administrivia and some tinkering

Tue, 2014-10-28 13:25

Zoe woke up at about 6am, which gave us a bit of extra time to get moving in the morning, or so I thought.

We biked over to the Kindergarten for drop off, and I left the trailer there to make biking back in the afternoon heat easier.

I had a pretty productive day. It was insanely hot, so I figured I could run the air conditioning more or less guilt (and expense free) courtesy of my solar power. I should check just how much power it draws to see how "free" it is to run.

I mostly cleared lots of random stuff off my to do list, and made a few lengthy phone calls. I also did some more tinkering with my BeagleBone Black, trying to get it set up so I can back up daedalus. It's been fun playing with Puppet again. I now have a pretty nice set up where I can wipe the BeagleBone Black and get it back to how I want it configured in about 5 minutes, thanks to Puppet.

I biked over to Kindergarten to pick up. I got there a few minutes early, and received a very heartening phone call regarding an issue I'd been working on earlier.

Zoe and Megan wanted to have a play date, and since it was hot and I'd left the air conditioning on, I suggested it be at our place. I biked home, and Jason dropped Megan around.

The girls played inside for a bit, but then wanted to do some more craft on the balcony, so I let them get to it, with instructions to put stuff away before they took more stuff out, and the balcony ended up significantly cleaner as a result. I used the time to do some more tinkering with my backups and to book a flight down to Sydney to help a friend out with some stuff.

A massive storm rolled in, not long after Anshu arrived, so we all went out on the balcony to watch the lightning, and then Sarah arrived to pick up Zoe. Megan hung out for a bit longer until Jason arrived to pick her up. News: Speaker Feature: Lillian Grace, David Rowe

Tue, 2014-10-28 09:28
Lillian Grace Wiki New Zealand: Winning through collaboration

4:35pm Thursday 15th January 2015

Lillian is the founder and chief of Wiki New Zealand.

Wiki New Zealand is a collaborative website making data about New Zealand visually accessible to everyone. The site presents data in simple, visual form only, so that it remains as unbiased and as accessible to everyone as possible. The content is easy to understand and digest, and is presented from multiple angles, wide contexts and over time, inviting users to compare, contrast and interpret. Lillian is an accomplished presenter who was invited to speak at OSDC 2013, was a keynote speaker at Gather 2014 and a speaker at TEDx Auckland 2013.

For more information on Lillian and her presentation, see here. You can follow her as @GracefulLillian and don’t forget to mention #LCA2015.

David Rowe The Democratisation of Radio

10:40am Thursday 15th January 2015

David is an electronic engineer living in Adelaide, South Australia. His mission is to improve the world – just a little bit, through designing open hardware and writing open source software for telephony.

In January 2006 David quit corporate life as an Engineering Manager to become an open source developer. He now develops open telephony hardware and software full time. David likes to build advanced telephony technology – then give it away.

For more information on David and his presentation, see here. You can follow him as @davidgrowe67 and don’t forget to mention #LCA2015.

James Morris: Linux Security Summit 2014 Wrap-Up

Tue, 2014-10-28 00:26

The slides from the 2014 Linux Security Summit in August may be found linked at the schedule.

LWN covered both the James Bottomley keynote, and the SELinux on Android talk by Stephen Smalley.

We had an engaging and productive two days, with strong attendance throughout.  We’ll likely follow a similar format next year at LinuxCon.  I hope we can continue to expand the contributor base beyond mostly kernel developers.  We’re doing ok, but can certainly do better.  We’ll also look at finding a sponsor for food next year.

Thanks to those who contributed and attended, to the program committee, and of course, to the events crew at Linux Foundation, who do all of the heavy lifting logistics-wise.

See you next year! News: Speaker Feature: Lana Brindley & Alexandra Settle, Olivier Bilodeau

Mon, 2014-10-27 11:28
Lana Brindley and Alexandra Settle 8 writers in under 8 months: from zero to a docs team in no time flat

11:35am Thursday 15th January 2015

Lana and Alexandra are both technical writers at Rackspace, the open Cloud Company.

Lana has been writing open source technical documentation for about eight years, and right now I’m working on documenting OpenStack with Rackspace, she does a lot of speaking, mostly about writing. She also talks about other topics from open source software to geek feminism and working in IT.

Lana is also involved in several volunteer projects including, Girl Geek Dinners, LinuxChix, OWOOT (Oceania Women of Open Tech), and various Linux Users Groups (LUGs). Alexandra is a technical writer with the Rackspace Cloud Builders Australia team. She began her career as a writer for the cloud documentation team at Red Hat, Australia. Alexandra prefers Fedora over other Linux distributions.

Recently she was part of a team that authored the OpenStack Design Architecture Guide, and hopes to further promote involvement in the OpenStack community within Australia.

For more information on Lana and Alexandra and their presentation, see here. You can follow them as @Loquacities (Lana) or @dewsday (Alexandra) and don’t forget to mention #LCA2015.

Olivier Bilodeau Advanced Linux Server-Side, Threats: How they work and what you can do about them

1:20pm Friday 16th January 2015

Olivier is an engineer that loves technology, software, security, open source, linux, brewing beer, travels and android.

Coming from the dusty Unix server room world, Olivier evolved professionally in networking, information security and open source software development to finally become malware researcher at ESET Canada. Presenting at Defcon, publishing in (In)secure Mag, teaching infosec to undergrads (ÉTS), driving the NorthSec Hacker Jeopardy and co-organizer of the MontréHack training initiative are among its note-worthy successes.

For more information on Olivier and his presentation, see here. You can follow him as @obilodeau and don’t forget to mention #LCA2015.