Debugging with intelligence via probabilistic inference

Debugging with intelligence via probabilistic inference Xu et al., ICSE’18

Xu et al. have built a automated debugger that can take a single failing test execution, and with minimal interaction from a human, pinpoint the root cause of the failure. What I find really exciting about it, is that instead of brute force there’s a certain encoded intelligence in the way the analysis is undertaken which feels very natural. The first IDE / editor to integrate a tool like this wins!

The authors don’t give a name to their tool in the paper, which is going to make it awkward to refer to during this write-up. So I shall henceforth refer to it as the PI Debugger. PI here stands for probabilistic inference.

We model debugging as a probabilistic inference problem, in which the likelihood of each executed statement instance and variable being correct/faulty is modeled by a random variable. Human knowledge, human-like reasoning rules and program semantics are modeled as conditional probability distributions, also called probabilistic constraints. Solving these constraints identifies the most likely faulty statements.

In the evaluation, when debugging problems in large projects, it took on average just 3 interactions with a developer to find the Continue reading

Cisco’s David Goeckeler talks security, networking, software and SD-WAN outlook

David Goeckeler doesn’t wear all of the hats at Cisco but he certainly wears one of the biggest.Responsible for 20,000 engineers and $32 billion worth of the networking giant’s business, Goeckeler, executive vice president and general manager, masterminds Cisco's network and security strategy which now features ever more emphasis on software. In fact, at the recent Cisco Live, Goeckeler emphasized that notion saying, “all the routers and switches and wireless access points (and in big networks there are going to be tens of thousands of those in a single enterprise network) we're thinking about that as one large software system.”To read this article in full, please click here

Cisco’s David Goeckeler talks security, networking, software and SD-WAN outlook

David Goeckeler doesn’t wear all of the hats at Cisco but he certainly wears one of the biggest.Responsible for 20,000 engineers and $32 billion worth of the networking giant’s business, Goeckeler, executive vice president and general manager, masterminds Cisco's network and security strategy which now features ever more emphasis on software. In fact, at the recent Cisco Live, Goeckeler emphasized that notion saying, “all the routers and switches and wireless access points (and in big networks there are going to be tens of thousands of those in a single enterprise network) we're thinking about that as one large software system.”To read this article in full, please click here

Cisco’s David Goeckeler talks security, networking, software and SD-WAN outlook

David Goeckeler doesn’t wear all of the hats at Cisco but he certainly wears one of the biggest.Responsible for 20,000 engineers and $32 billion worth of the networking giant’s business, Goeckeler, executive vice president and general manager, masterminds Cisco's network and security strategy which now features ever more emphasis on software. In fact, at the recent Cisco Live, Goeckeler emphasized that notion saying, “all the routers and switches and wireless access points (and in big networks there are going to be tens of thousands of those in a single enterprise network) we're thinking about that as one large software system.”To read this article in full, please click here

Oracle launches global internet ‘health’ map

While major cloud providers such as Amazon, Microsoft and Google have spent billions investing in their own networks to provide high-speed backbones, as have connectivity players like Verizon Enterprise, the fact remains that you still have to contend with regular internet traffic on a daily basis.And if your connections to the cloud seem slow, blame Netflix and YouTube, as they account for half of all internet traffic.With that headache in mind, the Oracle Internet Intelligence group has launched a free map of the global health of the internet, allowing enterprises to see where there are bottlenecks in internet traffic and perhaps route around them to their cloud providers.To read this article in full, please click here

Alert – Web server host migration on June 19, 2018

As you may have noticed, our shiny new website has some speed issues. It is slow for many visitors. Over the past few months we’ve worked on a number of potential changes to improve the site performance. One big change we’re making is to move to a different hosting provider.

That change will happen tomorrow – Tuesday, 19 June 2018 at 13:00 UTC.

Assuming all goes well, you shouldn’t really notice – except that the site should be faster! But if you happen to be browsing the site around 13:00 UTC, you might see some glitches on pages while the DNS magic happens and we change to pointing to the new server.

Once we’ve made this migration, I’ll write more about what we have done and how it has helped our site’s performance. Meanwhile, I just wanted to give a quick alert about this impending change to anyone viewing our site.

The post Alert – Web server host migration on June 19, 2018 appeared first on Internet Society.

What is Cohesity and why did it just pull in $250M in venture money?

Normally venture funding stories don’t get much play here, but when a company scores $250 million, for a grand total of $410 million raised, one has to wonder what all the hoopla is about. Especially given some of the spectacular flameouts we’ve seen over the years.But Cohesity isn’t vapor; it’s shipping a product that it claims helps solve a problem that has plagued enterprises forever: data siloing.Founded in 2013 and led by Nutanix co-founder Mohit Aron, Cohesity just racked up a $250 million investment led by SoftBank Group’s Vision Fund, which includes funding from Cisco Investments, Hewlett Packard Enterprise, Morgan Stanley Expansion Capital, and Sequoia Capital. Those are some big names, to say the least.To read this article in full, please click here

What is Cohesity and why did it just pull in $250M in venture money?

Normally venture funding stories don’t get much play here, but when a company scores $250 million, for a grand total of $410 million raised, one has to wonder what all the hoopla is about. Especially given some of the spectacular flameouts we’ve seen over the years.But Cohesity isn’t vapor; it’s shipping a product that it claims helps solve a problem that has plagued enterprises forever: data siloing.Founded in 2013 and led by Nutanix co-founder Mohit Aron, Cohesity just racked up a $250 million investment led by SoftBank Group’s Vision Fund, which includes funding from Cisco Investments, Hewlett Packard Enterprise, Morgan Stanley Expansion Capital, and Sequoia Capital. Those are some big names, to say the least.To read this article in full, please click here

Reflecting on the Internet Society’s 2017 Asia-Pacific Activities

The Asia-Pacific Bureau has been producing an annual snapshot of its activities and initiatives for a couple of years now, and we are pleased to present the 2017 edition. While it is not meant to be an exhaustive record of all that we did, it does provide a good overview of our activities in the region.

In addition to the Bureau’s core programmes, our Chapters are also very active in their local communities and, as volunteer-led entities, do amazing work in helping to support and carry out the Internet Society’s mission at the local level. We invited our chapters in the region to submit a summary of their activities, and the submissions that made it before the deadline are included in the report.

As I reflect on 2017, it probably stands out as the year the digital economy began to cement itself in the Asia-Pacific. Across the region, numerous developments, from the emergence (and to some extent, dominance) of local technology firms to new policies designed to facilitate the growth of connected societies all signify that countries in the largest region of the world – both in geography and population – are finally putting their plans into action.

Nowhere is Continue reading

Off the Cuff: Microsoft Purchases Github

Last week, Eyvonne, Donald, Alistair, and I sat and talked about the recent purchase of Github by Microsoft. Will this be the end of git as a widely used open source repository, or will we all look back in five years and think “move along, nothing to see here?”

How Ably Efficiently Implemented Consistent Hashing

This is a guest post by Srushtika Neelakantam, Developer Advovate for Ably Realtime, a realtime data delivery platform.

Ably’s realtime platform is distributed across more than 14 physical data centres and 100s of nodes. In order for us to ensure both load and data are distributed evenly and consistently across all our nodes, we use consistent hashing algorithms.

In this article, we’ll understand what consistent hashing is all about and why it is an essential tool in scalable distributed system architectures. Further, we’ll look at data structures that can be used to implement this algorithm efficiently at scale. At the end, we’ll also have a look at a working example for the same.

Hashing revisited

Remember the good old naïve Hashing approach that you learnt in college? Using a hash function, we ensured that resources required by computer programs could be stored in memory in an efficient manner, ensuring that in-memory data structures are loaded evenly. We also ensured that this resource storing strategy also made information retrieval more efficient and thus made programs run faster.

The classic hashing approach used a hash function to generate a pseudo-random number, which is then divided by the size of the memory Continue reading

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