Category Open Source
NoSQL at Twitter: Why / How they use Scribe, Hadoop/Pig, HBase, Cassandra, and FlockDB for data analytics?
Here’s some interesting NoSQL stuff guys. It’s a presentation about how Twitter uses NoSQL for analytics by Kevin Weil (@kevinweil), Analytics Lead, Twitter. About the presentation Collecting data (Scribe) Storing and Analyzing data (Hadoop) Rapid Learning over Big Data (Pig) .. and Cassandra, HBase, FlockDB. For those who are not aware of the said technologies… […]
You can use the below snippet to take screenshot and save it where you want. Commons IO libraries can be downloaded here: http://commons.apache.org/io/download_io.cgi
From Spring framework API docs for org.springframework.jms.core.JmsTemplate, “…The ConnectionFactory used with this template should return pooled Connections (or a single shared Connection) as well as pooled Sessions and MessageProducers. Otherwise, performance of ad-hoc JMS operations is going to suffer. The simplest option is to use the Spring-provided SingleConnectionFactory as a decorator for your target ConnectionFactory, […]
Have worked on ActiveMQ for quite a while, and there’s one annoying exception – java.io.IOException: Too many open files – which we see time to time. [localhost:61613] ERROR TransportConnector – Could not accept connection : Too many open files [email@example.com:8161] WARN log – EXCEPTION java.io.IOException: Too many open files at sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method) at sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:145) at […]
To start with, WebDriver is a tool that’s pretty useful in automating the testing of web apps. As of writing this post, Selenium, another popular and well established testing framework, integrated WebDriver API into Selenium v1 in its Selenium v2.x release. If you’d like to read more about WebDriver and Selenium, click here. What do you […]
Sharing something that was really helpful to me, when I started working with ActiveMQ.. You can download the pdf here: Download link Here’s the brief list of topics covered, if you’d like to glance over it.. What is ActiveMQ? Configuring/Installing ActiveMQ Wire Formats Transport/Network Connectors Message Persistence Journaled/Non-journaled JDBC Master/Slave Configurations Broker Security Network of […]