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I have recently made some programming using Hadoop, which is a framework for massive data processing over many numbers of servers. Hadoop reads input data from (large) files and performs MapReduce data reductions. One method of reading is input is decompressing GZIP:ed files. Java has built-in support for reading gzipped stream using GZIPInputStream. However, Hadoop ships with its own implementation that uses native libraries for efficiency. I was curious about…

Cloud computing is a general term for a public accessible virtualization system. Virtualization + DataCenter + PublicAccess = CloudComputing Although there are more than one provider and others to follow, Amazon (AWS) has pioneered the field and I will refer to AWS only when describing hands-on procedures. Sign Up The first thing to do is to create an AWS account and register a credit card – yes it’s not free,…

Nowadays, there are many services provided by Amazon WebServices (from now on referred to as AWS). Names and acronyms such as S3, EC2, SQS, FPS, SimpleDB, CloudFront, EBS, EIA are swirling around. I intend not to describe all of these, rather I will concentrate on the second acronym; EC2 (Elastic Compute Cloud) and its two companions EBS (Elastic Block Storage) and EIA (Elastic IP Address). These components (EC2/EBS/EIA + S3)…

I have previously investigated virtualization. A few years ago I used VMware WorkStation to run Fedora and Ubuntu on top WindowsXP. And before last summer, I used WMWS for a customer project running a deskop Ubuntu and two server Ubuntus (one with Oracle and the other as the project server). This autumn I discovered KVM @ Ubuntu. During this year I have been “kicking the tires” of the next logical…