Java Timestamp Class

Http://www.aliyun.com/zixun/aggregation/14223.html "> Application system, the log is an indispensable important part of all the application of error information should be able to find in the log file, 　　Some application system log may be very small, some large application system log is quite large, while the log file must be user-friendly and search, to have a high performance, otherwise it will affect the performance of the application system. Because the log usually involves I.

After completing the four basic learning steps of Apache Cassandra, you can try the actual code. If necessary, it is recommended to briefly review: Apache Cassandra Learning Step (1) Apache Cassandra Learning Ste ...

To use Hadoop, data consolidation is critical and hbase is widely used. In general, you need to transfer data from existing types of databases or data files to HBase for different scenario patterns. The common approach is to use the Put method in the HBase API, to use the HBase Bulk Load tool, and to use a custom mapreduce job. The book "HBase Administration Cookbook" has a detailed description of these three ways, by Imp ...

HBase is a distributed, column-oriented, open source database based on Google's article "Bigtable: A Distributed Storage System for Structured Data" by Fay Chang. Just as Bigtable takes advantage of the distributed data storage provided by Google's File System, HBase provides Bigtable-like capabilities over Hadoop. HBase Implements Bigtable Papers on Columns ...

MongoDB company formerly known as 10gen, founded in 2007, in 2013 received a sum of 231 million U.S. dollars in financing, the company's market value has been increased to 1 billion U.S. dollar level, this height is well-known open source company Red Hat (founded in 1993) 20 's struggle results. High-performance, easy to expand has been the foothold of the MongoDB, while the specification of documents and interfaces to make it more popular with users, this point from the analysis of the results of Db-engines's score is not difficult to see-just 1 years, MongoDB finished the 7th ...

The 2013 will soon be over, summarizing the major changes that have taken place in the year hbase. The most influential event is the release of HBase 0.96, which has been released in a modular format and provides many of the most compelling features. 　　These characteristics are mostly in yahoo!/facebook/Taobao/millet and other companies within the cluster run a long time, can be considered more stable available. 1. Compaction Optimization HBase compaction is a long-standing inquiry ...

This series of articles shows you how to use reverse Ajax http://www.aliyun.com/zixun/aggregation/7332.html "> Technology to develop event-driven WEB programs." The 1th part describes reverse Ajax, polling, streaming, Comet, and long polling. Part 2nd describes how to use WebSocket and discusses the limitations of WEB servers that use Comet and WebSocket. The first ...