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There are two basic problems in information theory that are very easy to explain. Two people, Alice and Bob, want to communicate over a digital channel over some long period of time, and they know the probability that certain messages will be sent ahead of time. For example, English language sentences are more likely than gibberish, and “Hi” is much more likely than “asphyxiation.” The problems are: Say communication is very expensive.
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There are two basic problems in information theory that are very easy to explain. Two people, Alice and Bob, want to communicate over a digital channel over some long period of time, and they know the probability that certain messages will be sent ahead of time. For example, English language sentences are more likely than gibberish, and “Hi” is much more likely than “asphyxiation.” The problems are: Say communication is very expensive.
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There are two basic problems in information theory that are very easy to explain. Two people, Alice and Bob, want to communicate over a digital channel over some long period of time, and they know the probability that certain messages will be sent ahead of time. For example, English language sentences are more likely than gibberish, and “Hi” is much more likely than “asphyxiation.” The problems are: Say communication is very expensive.
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Over the coming month I will be architecting, building and testing a modular, high performance SSD-only storage solution. I’ll be documenting my progress / findings along the way and open sourcing all the information as a public guide. With recent price drops and durability improvements in solid state storage now is better time than any to ditch those old magnets. Modular server manufacturers such as SuperMicro have spent large on R&D..
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Over the coming month I will be architecting, building and testing a modular, high performance SSD-only storage solution. I’ll be documenting my progress / findings along the way and open sourcing all the information as a public guide. With recent price drops and durability improvements in solid state storage now is better time than any to ditch those old magnets. Modular server manufacturers such as SuperMicro have spent large on R&D..
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Over the coming month I will be architecting, building and testing a modular, high performance SSD-only storage solution. I’ll be documenting my progress / findings along the way and open sourcing all the information as a public guide. With recent price drops and durability improvements in solid state storage now is better time than any to ditch those old magnets. Modular server manufacturers such as SuperMicro have spent large on R&D..
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Over the coming month I will be architecting, building and testing a modular, high performance SSD-only storage solution. I’ll be documenting my progress / findings along the way and open sourcing all the information as a public guide. With recent price drops and durability improvements in solid state storage now is better time than any to ditch those old magnets. Modular server manufacturers such as SuperMicro have spent large on R&D..
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Over the coming month I will be architecting, building and testing a modular, high performance SSD-only storage solution. I’ll be documenting my progress / findings along the way and open sourcing all the information as a public guide. With recent price drops and durability improvements in solid state storage now is better time than any to ditch those old magnets. Modular server manufacturers such as SuperMicro have spent large on R&D..
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Over the coming month I will be architecting, building and testing a modular, high performance SSD-only storage solution. I’ll be documenting my progress / findings along the way and open sourcing all the information as a public guide. With recent price drops and durability improvements in solid state storage now is better time than any to ditch those old magnets. Modular server manufacturers such as SuperMicro have spent large on R&D..
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On Thursday 2015–02–05 I gave a talk as the awesome SFNode Meetup entitled "Background Jobs for NodeJS".
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TL/DR: Regular expressions are fast, until they aren’t. How I got a 20x performance by switching to string functions. With the new version of searchcode.com one of the main things I wanted to address was performance. The previous version had all sorts of performance issues which were not limited to the usual suspects such as the database or search index. When developing the new version one of the tasks listed in my queue was to profile ..
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Further to my earlier post on XenServer storage performance with regards to directly attaching storage from the host, I have been analysing the performance of various SSD storage options. I have attached a HP DS2220sb storage blade to an existing server blade and compared performance with 4 and 6 SSD RAID-10 to our existing iSCSI SANs. While the P420i RAID controller in the DS2220sb is clearly saturated and unable to provide throughput ..
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The way we work at Infoxchange has changed greatly. A retrospective journey into transforming Infoxchange’s technology and culture over the past 24 months - presented a Melbourne DevOps - December 2014
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Intro At Infoxchange we use XenServer as our Virtualisation of choice. There are many reasons for this including: Open Source. Offers greater performance than VMware. Affordability (it’s free unless you purchase support). Proven backend Xen is very reliable. Reliable cross-host migrations of VMs. The XenCentre client, (although having to run in a Windows VM) is quick and simple to use. Upgrades and patches have proven to be more reliable..
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Further to my earlier post on XenServer storage performance with regards to directly attaching storage from the host, I have been analysing the performance of various SSD storage options. I have attached a HP DS2220sb storage blade to an existing server blade and compared performance with 4 and 6 SSD RAID-10 to our existing iSCSI SANs. While the P420i RAID controller in the DS2220sb is clearly saturated and unable to provide throughput ..
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The way we work at Infoxchange has changed greatly. A retrospective journey into transforming Infoxchange’s technology and culture over the past 24 months - presented a Melbourne DevOps - December 2014
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Intro At Infoxchange we use XenServer as our Virtualisation of choice. There are many reasons for this including: Open Source. Offers greater performance than VMware. Affordability (it’s free unless you purchase support). Proven backend Xen is very reliable. Reliable cross-host migrations of VMs. The XenCentre client, (although having to run in a Windows VM) is quick and simple to use. Upgrades and patches have proven to be more reliable..
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The way we work at Infoxchange has changed greatly. A retrospective journey into transforming Infoxchange’s technology and culture over the past 24 months - presented a Melbourne DevOps - December 2014
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Further to my earlier post on XenServer storage performance with regards to directly attaching storage from the host, I have been analysing the performance of various SSD storage options. I have attached a HP DS2220sb storage blade to an existing server blade and compared performance with 4 and 6 SSD RAID-10 to our existing iSCSI SANs. While the P420i RAID controller in the DS2220sb is clearly saturated and unable to provide throughput ..
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Intro At Infoxchange we use XenServer as our Virtualisation of choice. There are many reasons for this including: Open Source. Offers greater performance than VMware. Affordability (it’s free unless you purchase support). Proven backend Xen is very reliable. Reliable cross-host migrations of VMs. The XenCentre client, (although having to run in a Windows VM) is quick and simple to use. Upgrades and patches have proven to be more reliable..
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The way we work at Infoxchange has changed greatly. A retrospective journey into transforming Infoxchange’s technology and culture over the past 24 months - presented a Melbourne DevOps - December 2014
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Further to my earlier post on XenServer storage performance with regards to directly attaching storage from the host, I have been analysing the performance of various SSD storage options. I have attached a HP DS2220sb storage blade to an existing server blade and compared performance with 4 and 6 SSD RAID-10 to our existing iSCSI SANs. While the P420i RAID controller in the DS2220sb is clearly saturated and unable to provide throughput ..
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The way we work at Infoxchange has changed greatly. A retrospective journey into transforming Infoxchange’s technology and culture over the past 24 months - presented a Melbourne DevOps - December 2014
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Intro At Infoxchange we use XenServer as our Virtualisation of choice. There are many reasons for this including: Open Source. Offers greater performance than VMware. Affordability (it’s free unless you purchase support). Proven backend Xen is very reliable. Reliable cross-host migrations of VMs. The XenCentre client, (although having to run in a Windows VM) is quick and simple to use. Upgrades and patches have proven to be more reliable..
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The way we work at Infoxchange has changed greatly. A retrospective journey into transforming Infoxchange’s technology and culture over the past 24 months - presented a Melbourne DevOps - December 2014
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Further to my earlier post on XenServer storage performance with regards to directly attaching storage from the host, I have been analysing the performance of various SSD storage options. I have attached a HP DS2220sb storage blade to an existing server blade and compared performance with 4 and 6 SSD RAID-10 to our existing iSCSI SANs. While the P420i RAID controller in the DS2220sb is clearly saturated and unable to provide throughput ..
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Intro At Infoxchange we use XenServer as our Virtualisation of choice. There are many reasons for this including: Open Source. Offers greater performance than VMware. Affordability (it’s free unless you purchase support). Proven backend Xen is very reliable. Reliable cross-host migrations of VMs. The XenCentre client, (although having to run in a Windows VM) is quick and simple to use. Upgrades and patches have proven to be more reliable..
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Intro At Infoxchange we use XenServer as our Virtualisation of choice. There are many reasons for this including: Open Source. Offers greater performance than VMware. Affordability (it’s free unless you purchase support). Proven backend Xen is very reliable. Reliable cross-host migrations of VMs. The XenCentre client, (although having to run in a Windows VM) is quick and simple to use. Upgrades and patches have proven to be more reliable..
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The way we work at Infoxchange has changed greatly. A retrospective journey into transforming Infoxchange’s technology and culture over the past 24 months - presented a Melbourne DevOps - December 2014
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Further to my earlier post on XenServer storage performance with regards to directly attaching storage from the host, I have been analysing the performance of various SSD storage options. I have attached a HP DS2220sb storage blade to an existing server blade and compared performance with 4 and 6 SSD RAID-10 to our existing iSCSI SANs. While the P420i RAID controller in the DS2220sb is clearly saturated and unable to provide throughput ..
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Search - A Journey of Delivery on a Budget” Presented a Melbourne Search - July 2014 - “Search - A Journey of Delivery on a Budget” (Click for slides)
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The way we work at Infoxchange has changed greatly. A retrospective journey into transforming Infoxchange’s technology and culture over the past 24 months - presented a Melbourne DevOps - December 2014
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At the end of every year I note down a summary of the best applications, hardware & websites I’ve enjoyed & depended on throughout the year (and often for some time before). This post has long since been superseded. You can find the latest version of this post here . Software / General Use Fastmail - https://www.fastmail.com Evernote - https://evernote.com Reeder - http://reederapp.com Keynote - https://www.apple.com/au/mac/ke....
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Intro At Infoxchange we use XenServer as our Virtualisation of choice. There are many reasons for this including: Open Source. Offers greater performance than VMware. Affordability (it’s free unless you purchase support). Proven backend Xen is very reliable. Reliable cross-host migrations of VMs. The XenCentre client, (although having to run in a Windows VM) is quick and simple to use. Upgrades and patches have proven to be more reliable..
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The way we work at Infoxchange has changed greatly. A retrospective journey into transforming Infoxchange’s technology and culture over the past 24 months - presented a Melbourne DevOps - December 2014
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DbInspector is a useful library that helps us to view our database in the app. I have forked it and tried to add some small features to make this awesome library more awesome, and even more useful.
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Patching django sessions to control user sessions
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engineering.hackerearth.com
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11 years ago
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eng
Introduction HackerEarth uses django framework at its heart. We use two third party django packages for the purpose of user authentication and session management: django-allauth : Provides pre-built modules for email-based as well as all popular social authentication mechanisms. django-redis-sessions : Allows storage of user session data in redis (a memory based data store that writes on disk) for fast retrieval. We used MySQL earlier ....
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DbInspector is a useful library that helps us to view our database in the app. I have forked it and tried to add some small features to make this awesome library more awesome, and even more useful.
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Rust Sydney had its first event last Monday! The first Rust gathering I know of in Sydney, in Australia, or in the whole southern hemisphere. I had fun meeting all sorts of people interested in Rust: some who’d dived in deep already, some who’d only recently started playing with it, and some who’d been following for a while but had unfortunately not got time to actually use it (hopefully soon!). Thanks to everyone who came and, to ....
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Last Saturday we had the Short North gallery hop . Hundreds of people came through our gallery to see art. The guys helped me set up the Oculus and a projector on the wall. Sometimes I had to go out and pull people in, but most of the time, there was a line. My favorite customer by far was this kid: He jumped right in and played like a pro. The mother (recording video) was super supportive and excited.
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Amazon, I quit. I tried, Amazon. I really did. For the last few months I tried to make it work with an EC2 instance for Gastropoda. I tried two main methods of deployment, both of which worked sporadically at various points:
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h1Slides are up/h1 pThe slides from our speakers are now about on the site, and are linked to from a href=http://flick.etc.gen.nz/~puck/nz2015minidebconf/./Programme/Programme/a./p pThank you to the speakers and the attendees for making the mini-debconf a success!/p
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Frequently while coding I need to know the internal and external IP address of my development machine. For example, when your machine is serving a website from a locally running web server, the internal IP address can be used to test the site from a smartphone browser connected to the same network. Likewise, the external IP address is useful when you want to make a local web server publicly accessible or when you need to whitelist your IP a..
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We, at Wingify, have been writing e2e test cases for our A/B testing app for the past 5 months using protractor. Writing e2e scripts is easy…
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