Corrupt Data Recovery

Refer to Hadoop_hdfs system dual-machine hot standby scheme. PDF, after the test has been added to the two-machine hot backup scheme for Hadoopnamenode 1, foreword currently hadoop-0.20.2 does not provide a backup of name node, just provides a secondary node, although it is somewhat able to guarantee a backup of name node, when the machine where name node resides ...

To date, security and compliance issues remain a major cause of the cloud's impediment. In a recent survey released by Lieberman Software Security, results showed that nearly 48% of teams are concerned about government and legal interference before placing sensitive data in the cloud. Lieberman Software Security Inc. has released a survey of more than 300 IT professionals involved in a survey that shows that companies are hesitant about migrating sensitive data to the cloud, mostly about government and law. ..

The advent of cloud computing has proclaimed the advent of Low-cost supercomputing, which has pushed human society into an era of hyper-sharing with its superior computing power, low cost and high efficiency, and the construction of digital archives has entered a qualitative change. In the past two years, all the archives have considered relying on the existing hardware network equipment to build a national and regional cloud computing platform to achieve the unified management of huge amount of archival information. Using cloud computing Architecture system platform, can make a large number of file servers work together to facilitate the deployment and opening of archival operations, rapid detection and recovery of system failures, to the daily ...

Without more forceful political, economic and technical support, Weibo, the main platform of public opinion in China, will decline.   　　But social media itself echoes the transcendental desire of Chinese citizens to be self-organizing and free speech, and should evolve through market competition and win the power to change the society with a more courageous posture. Sina Weibo, a veteran Nasdaq-listed company that has been on the market for 4 years, has been churning out a social product that is rapidly sweeping China's white-collar class-the highest peak in 20 months. Afterwards, the business became cash and the political wind ...

October 23, the gem is one year old!　　Over the past year, the newborn gem in the pursuit of investors and the abandonment of the faltering walk; a year of wind and rain, the gem has not only added a bit of worry, but also added a dash of maturity and infiltration of hope. Last year, "Ten years of grinding a sword" of the gem in the introduction of the market is not attracted to the eyeball.　　There is a keen hope that new sources of financing can help small and medium-sized enterprises to create a group of Microsoft, Intel, Amazon-style High-tech enterprises. Unfortunately, everyone's questioning of the gem is much higher than praise. Gem surrendered 28 ...