In December of 2014 I wrote an article about a legal agreement that was discouraging network operators from implementing an important Internet security function. I am happy to report, the situation has improved: ARIN no longer requires operators explicitly accept a click-through agreement in order to access the Trust Anchor Locator (TAL). Resource Public Key […]
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Let’s have a little talk about BGP convergence.
Geoff Huston’s recent article on the reality of Internet connectivity—no, everyone cannot connect to everyone—prompted a range of reactions from various folks I know.
For instance, BGP is broken! After all, any routing protocol that can’t provide basic reachability to every attached destination must be broken, right? The problem with this statement is it assumes BGP is, at core, a routing protocol. To set the record straight, BGP is not, at heart, a routing protocol in the traditional sense of the term. BGP is a system used to describe bilateral peering arrangements between independent parties in a way that provides loop free reachability information. The primary focus of BGP is not loop free reachability, but policy.
After all, BGP convergence is a big deal, right? Part of the problem here is that we use BGP as a routing protocol in some situations (for instance, on data center fabrics), so we have a hard time adjusting our thinking Continue reading
Hi, I'm Manu Mahajan and I'm a software engineer with Keen IO's Platform team. Over the past year I've focused on improving our query performance and scalability. I wanted to share some things we've learned from this experience in a series of posts.
Today, I'll describe how we're working to guarantee consistent performance in a multi-tenant environment built on top of Apache Storm.
tl;dr we were able to make query response times significantly more consistent and improve high percentile query-duration by 6x by making incremental changes that included isolating heterogenous workloads, making I/O operations asynchronous, and using Storm’s queueing more efficiently.
Keen IO is an analytics API that allows customers to track and send event data to us and then query it in interesting ways. We have thousands of customers with varying data volumes that can range from a handful of events a day to upwards of 500 million events per day. We also support different analysis types like counts, percentiles, select-uniques, funnels, and more, some of which are more expensive to compute than others. All of this leads to a spectrum of query response times ranging from a few milliseconds to a few minutes.
The Continue reading
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A year after HPE moved to acquire the WLAN vendor, Aruba shows off the results of a deal that had network pros worried.
Site surveys are essential for optimal WLAN performance. Here’s how they’re done.