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By David Mytton, CEO & Founder of Server Density. Published on the 19th January, 2016. Distributed systems and microservices are all the rage these days, and Apache Kafka seems to be getting most of that attention. Here at Server Density we use it as part of our payloads processing (see: Tech chat: processing billions of events a day with Kafka, Zookeeper and Storm). For the uninitiated, Kafka is
Last year we compiled a list of 80 Linux monitoring tools. Encouraged by the success of that list, we’ve been meaning to do the same for Windows for some time now. Well, the time has finally come. Here is a comprehensive list of Windows monitoring tools. This is not meant to be a detailed review, not least a comparison or evaluation. Think of it as a starting point in your search for the perfect m
Network performance at AWS, Google, Rackspace and Softlayer By David Mytton, CEO & Founder of Server Density. Published on the 24th April, 2014. This post was originally published on GigaOm. Compute and storage are essentially commodity services, which means that for cloud providers to compete, they have to show real differentiation. This is often achieved with supporting services like Amazon’s Dy
The tech behind our time series graphs – 2bn docs per day, 30TB per month By David Mytton, CEO & Founder of Server Density. Published on the 14th March, 2014. This post was also published on the MongoDB Blog. Server Density processes over 30TB/month of incoming data points from the servers and web checks we monitor for our customers, ranging from simple Linux system load average to website respons
By David Mytton, CEO & Founder of Server Density. Published on the 14th April, 2016. Editor’s note: For a detailed look at how we systematically unearth productivity black-holes in our Ops team, join the webinar at the end of this page. Note, this is a new version of an article originally published on 03/15/2014. As your team infrastructure grows, one of the most important things is how it’s docum
By David Mytton, CEO & Founder of Server Density. Published on the 21st February, 2013. One of things that makes MongoDB easy to get started with is you don’t have to think about schema design – just shove data in and it’ll let you query it. That helps initial development and has benefits down the line when you want to change your document structure. That said… Remember, "schemaless" doesn't mean
By David Mytton, CEO & Founder of Server Density. Published on the 25th September, 2012. For a guaranteed surge of traffic and to hit the Hacker News homepage, all you need to do is write about why you hate MongoDB and/or migrated to some other database. We’ve been using it to power our server monitoring service, Server Density, for over 3 years now and so with experience, many of the problems cit
By David Mytton, CEO & Founder of Server Density. Published on the 23rd May, 2012. Perhaps the most oft-cited problem with MongoDB is the infamous global lock. In general terms, this means that the entire server is locked when you perform a write operation. This sounds bad but is actually blown out of proportion compared to the real world in production impact. It has been improved over the version
By David Mytton, CEO & Founder of Server Density. Published on the 11th May, 2012. Update There has been a lot of discussion of this post around whether this is a problem with Memcached or something else. The post content is accurate but in hindsight, the use of “Memcached” should really have been “Membase + Moxi”. Membase provides additional tools on top of Memcached so whilst Memcached itself wa
By David Mytton, CEO & Founder of Server Density. Published on the 21st July, 2011. Over the 2 years we’ve been using MongoDB in production with our server monitoring tool, Server Density, we’ve built up significant experience and knowledge about how it works. Back in 2009 when I was looking at a replacement for MySQL I looked at Cassandra but dismissed it because MongoDB had several advantages, a
By David Mytton, CEO & Founder of Server Density. Published on the 7th October, 2010. Perhaps the most important feature of our server monitoring iPhone and Android apps is the ability to receive alerts via push notification directly to your device. On the iPhone, notifications are easy to implement and included since iPhone OS 3 but on Android it’s a little more complex, and the Google provided “
By David Mytton, CEO & Founder of Server Density. Published on the 13th December, 2010. There are a number of built in tools and commands which can be used to get important information from MongoDB but because it is relatively new, it can be difficult to know what you need to be doing from an operational perspective to ensure that everything runs smoothly. This is the 1st in a series of 6 posts ab
By David Mytton, CEO & Founder of Server Density. Published on the 14th March, 2011. There are a number of built in tools and commands which can be used to get important information from MongoDB but because it is relatively new, it can be difficult to know what you need to be doing from an operational perspective to ensure that everything runs smoothly. This is the last in a series of 6 posts abou
By David Mytton, CEO & Founder of Server Density. Published on the 28th February, 2010. Back in July last year I wrote about our migration from MySQL to MongoDB. We have been running MongoDB in production for our server monitoring service, Server Density, since then – 8 months – and have learnt quite a few things about it. These are the kind of things that you only experience once you reach a cert
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