Monthly Archives: April 2016

Book notes about “Amazon Redshift Database Developer Guide”

Although be already familiar with Cloud Computing for may years, I haven’t look inside many services provided by Amazon Web Service. Because my company (Alibaba) has it’s own cloud platform: Aliyun, so we are only allowed to use home-made cloud products, such as ECS(like EC2 in AWS), RDS(like RDS in… Read more »

Use type of “Any” carefully in Scala

Think about the code below:

I intent to see the compiler error for second ‘increment’ int the first place. But it don’t, the compiler report ok and the output of the program is:

The compiler recognize the three arguments “world”, “6”, “7” as a tuple of (“world”, 6,… Read more »

Usage limitations of HDFS’s C API

I have to change a program which is written by c language from writing local files to writing on HDFS. After learning the example of C API in libhdfs, I complete the modification of open()/write()/read() to hdfsOpenFile()/hdfsWriteFile()/hdfsReadFile() and so on. But when running the new program, many problems occured. The… Read more »

Network problem of installing docker-engine on Centos-7

After installing docker-engine on Centos-7, it failed to start by

After I use

it shows:

To see more details, I use

There were much more informations now:

The ethernet interface of docker0 can not be assigned IPv4 addresse. It seems many people meet this problem… Read more »