Have you ever counted the number of Linux devices at home or work that haven’t been updated since they came out of the factory? Your cable/fibre/ADSL modem, your WiFi point, television sets, NAS storage, routers/bridges, media centres, etc. Typically this class of devices hosts a proprietary hardware platform, an embedded proprietary Linux and a proprietary application. If you are lucky you are able to log into a web GUI often using the admin/admin credentials and upload a new firmware blob. This firmware blob is frequently hard to locate on hardware supplier’s websites. No wonder the NSA and others love to look into potential firmware bugs. They are the ideal source of undetected wiretapping.
The next IT revolution: micro-servers
The next IT revolution is about to happen however. Those proprietary hardware platforms will soon give room for commodity multi-core processors from ARM, Intel, etc. General purpose operating systems will replace legacy proprietary and embedded predecessors. Proprietary and static single purpose apps will be replaced by marketplaces and multiple apps running on one device. Security updates will be sent regularly. Devices and apps will be easy to manage remotely. The next revolution will be around managing millions of micro-servers and the apps on top of them. These micro-servers will behave like a mix of phone apps, Docker containers, and cloud servers. Managing them will be like managing a “local cloud” sometimes also called fog computing.
Micro-servers and IoT?
Are micro-servers some form of Internet of Things. Yes they can be but not all the time. If you have a smarthub that controls your home or office then it is pure IoT. However if you have a router, firewall, fibre modem, micro-antenna station, etc. then the micro-server will just be an improved version of its predecessor.
Why should you care about micro-servers?
If you are a mobile app developer then the micro-servers revolution will be your next battlefield. Local clouds need “Angry Bird”-like successes.
If you are a telecom or network developer then the next-generation of micro-servers will give you unseen potentials to combine traffic shaping with parental control with QoS with security with …
If you are a VC then micro-server solution providers is the type of startups you want to invest in.
If you are a hardware vendor then this is the type of devices or SoCs you want to build.
If you are a Big Data expert then imagine the new data tsunami these devices will generate.
If you are a machine learning expert then you might want to look at algorithms and models that are easy to execute on constraint devices once they have been trained on potentially thousands of cloud servers and petabytes of data.
If you are a Devop then your next challenge will be managing and operating millions of constraint servers.
If you are a cloud innovator then you are likely to want to look into SaaS and PaaS management solutions for micro-servers.
If you are a service provider then this is the type of solutions you want to have the capabilities to manage at scale and easily integrate with.
If you are a security expert then you should start to think about micro-firewalls, anti-micro-viruses, etc.
If you are a business manager then you should think about how new “mega micro-revenue” streams can be obtained or how disruptive “micro- innovations” can give you a competitive advantage.
If you are an analyst or consultant then you can start predicting the next IT revolution and the billions the market will be worth in 2020.
The next steps…
It is still early days but expect some major announcements around micro-servers in the next months…
The website defines Spark as a MapReduce-like cluster computing framework designed to support low-latency iterative jobs. However it would be easier to say that Spark is Hadoop for real-time.
Spark allows you to run MapReduce jobs together with your data on distributed machines. Unlike Hadoop Spark can distributed your data in slices and store it in memory hence your processing and data are co-located in memory. This gives an enormous performance boost. Spark is more than MapReduce however. It offers a new distributed framework on which different distributed computing paradigms can be modelled. Examples are: Hadoop’s Hive => Shark (40x faster than Hive), Google’s Pregel / Apache’s Giraph => Bagel, etc. An upcoming Spark Streaming is supposed to bring real-time streaming to the framework.
The excellent part
Spark is written in Scala and has a very straight forward syntax to run applications from the command line or via compiled code. The possibilities to run iterative operations over large datasets or very compute intensive operations in parallel, make it ideal for big data analytics and distributed machine learning.
The points for improvement
In order to use Spark, you need to install Mesos. Mesos is a framework for distributed computing that was also developed by Berkeley. So in a sense they are eating their own dog food. Unfortunately Mesos is not written in scala so installing Spark becomes a mix of make’s, ant’s, .sh, XML, properties, .conf, etc. It would not be bad if Mesos would have consistent documentation but due to incubation into Apache the installation process is currently undergoing changes and is not straightforward.
Spark allows to connect to Hadoop, Hbase, etc. However running Hadoop on top of Mesos is “experimental” to say the least. The integration with Hadoop should be lighter. At the end only access to HDFS, SequenceFiles, etc. is required. This should not mean that a complete Hadoop should be installed and Spark should be recompiled for each specific Hadoop version.
If Spark wants to become as successful as Hadoop, then they should learn from Hadoop’s mistakes. Complex installation is a big problem because Spark needs to be installed on many machines. The Spark team should take a look at Ruby’s Rubygems, Node.js’s npm, etc. and make the installation simple, ideally via Scala’s package manager, although it is less popular.
If possible the team should drop Mesos as a prerequisite and make it optional. One of Spark’s competitors is Storm & Trident, you can install a Storm cluster in minutes and have a one click command to run Storm on an EC2 cluster.
It would be nice if there would be an integration SDK that allows extensions to be plugged-in. Integrations with Cassandra, Redis, Memcache, etc. could be developed by others. Also looking at a distribution in which Cassandra’s Brisk is used to mimic Hive and HDFS (a.k.a. CassandraFS) and have it all pre-bundled with Shark, could be an option. Spark’s in-memory execution and read speed, combined with Cassandra’s write speed, should make for a pretty quick and scalable solution. Ideally without the need to fight with namenodes, datanodes, jobtrackers, etc. and other Hadoop hard-to-configure inventions…
The conclusion is that distributed computing and programming is already hard enough by itself. Programmers should be focusing on their algorithms and not need a professional admin to get them started.
All-in-all Spark, Shark, Streaming Spark, Bagel, etc. have a lot of potential, it is just a little bit rough around the edges…
Update: I am reviewing my opinion about Mesos. See the Mesos post.
In a previous post I mentioned Storm already. Trident is an extension of Storm that makes it an easy-to-use distributed real-time analytics framework for Big Data. Both Trident and Storm were developed by Twitter.
One of Twitter’s major problems is to keep statistics of Tweets and Tweeted URLs that get retweeted by millions of followers. Imagine a famous person who tweets a URL to millions of followers. Lots of followers will retweet the URL. So how do you calculate how many Tweeters have seen the URL? This is important for features like “Top retweeted URLs”.
The answer was Storm but with the addition of Trident, it has become a lot easier to manage. Trident is doing to Storm what Pig and Cascading are doing to Hadoop: simplification. Instead of having to create a lot of Spouts and Bolts and take care of how messages are distributed, Trident comes with a lot of the work already done.
In a few lines of code, you set-up a Distributed RPC server, send it URLs, have it collect the tweeters and followers and count them. Fail-over and resiliance as well as massive distribution throughput are build into the platform. You can see it in this example code:
TridentState urlToTweeters =
TridentState tweetersToFollowers =
.stateQuery(urlToTweeters, new Fields("args"), new MapGet(), new Fields("tweeters"))
.each(new Fields("tweeters"), new ExpandList(), new Fields("tweeter"))
.stateQuery(tweetersToFollowers, new Fields("tweeter"), new MapGet(), new Fields("followers"))
.each(new Fields("followers"), new ExpandList(), new Fields("follower"))
.aggregate(new One(), new Fields("one"))
.aggregate(new Count(), new Fields("reach"));
The possibilities of Trident + Storm, combined with fast scalable datastores, like for instance Cassandra, are enormous. Everything from real-time counters, filtering, complex event processing, machine learning, etc.
The Storm concept of Spout [data generation] and Bolt [data processing] can be easily understood by most programmers. Storm is an asynchronous highly distributed framework but with a simple distributed RPC server it can easily be used in synchronous code.
The only drawback I have seen is that DRPC is focused only on Strings (and other primitive types that can be contained in a String). Adding more complex objects (via Kryo, Avro, Protocol Buffers, etc.), or at least bytes, would be useful for companies that do not only focus on Tweets.
Hadoop has run into architectural limitations and the community has started working on the Next Generation Hadoop [NGN Hadoop]. NGN Hadoop has some new management features of which multi-tenant application management is the major one. However the key change is that MapReduce no longer is entangled inside the rest of Hadoop. This will allow Hadoop to be used for MPI, Machine Learning, Master-Worker, Iterative Processing, Graph Processing, etc. New tools to better manage Hadoop are also being incubated, e.g. Ambari and HCatalog.
Why is this important for telecom?
Having one platform that allows massive data storage, peta-byte data analytics, complex parallel computations, large-scale machine learning, big data map reduce processing, etc. all in one multi-tenant set-up means that telecom operators could see massive reductions in their architecture costs together with faster go-to-market, better data intelligence, etc.
Telecom applications, that are redesigned around this new paradigm, can all use one shared back-office architecture. Having data centralized into one large Hadoop cluster instead of tens or hundreds of application-specific databases, will enable unseen data analytics possibilities and bring much-needed efficiencies.
What is needed is that several large operators define this approach as their standard architecture hence telecom solution providers will start incorporating it into their solutions. Commercial support can be easily acquired from companies like Hortonworks, Cloudera, etc.
Having one shared data architecture and multi-tenant application virtualization in the form of a Telco PaaS would allow third-parties to launch new services quickly and cheaply, think days in stead of years…