HFile: A Block-Indexed File Format to Store Sorted Key-Value PairsSchubert Zhang
HFile is a mimic of Google’s SSTable. Now, it is available in Hadoop HBase-0.20.0. And the previous releases of HBase temporarily use an alternate file format – MapFile, which is a common file format in Hadoop IO package. I think HFile should also become a common file format when it becomes mature, and should be moved into the common IO package of Hadoop in the future.
Cassandra Compression and Performance EvaluationSchubert Zhang
Even though we had abandoned the Cassandra in all our products, we would like to share our works here.
Why we abandoned the Cassandra in our products? Because:
(1) It is a big wrong in Cassandra's implementation, especially on it's local storage engine layer, i.e. SSTable and Indexing.
(2) It is a big wrong to combine Bigtable and Dynamo. Dynamo's hash ring architecture is a obsolete technolohy for scale, it's consistency and replication policy is also unusable in big data storage.
The Cloud Computing China Congress (CCCC http://www.cloudcomputingchina.org ) is specially designed for senior IT and line of business executives evaluating and making purchasing decisions in the areas of on-demand infrastructure and software services.
HFile: A Block-Indexed File Format to Store Sorted Key-Value PairsSchubert Zhang
HFile is a mimic of Google’s SSTable. Now, it is available in Hadoop HBase-0.20.0. And the previous releases of HBase temporarily use an alternate file format – MapFile, which is a common file format in Hadoop IO package. I think HFile should also become a common file format when it becomes mature, and should be moved into the common IO package of Hadoop in the future.
Cassandra Compression and Performance EvaluationSchubert Zhang
Even though we had abandoned the Cassandra in all our products, we would like to share our works here.
Why we abandoned the Cassandra in our products? Because:
(1) It is a big wrong in Cassandra's implementation, especially on it's local storage engine layer, i.e. SSTable and Indexing.
(2) It is a big wrong to combine Bigtable and Dynamo. Dynamo's hash ring architecture is a obsolete technolohy for scale, it's consistency and replication policy is also unusable in big data storage.
The Cloud Computing China Congress (CCCC http://www.cloudcomputingchina.org ) is specially designed for senior IT and line of business executives evaluating and making purchasing decisions in the areas of on-demand infrastructure and software services.
Big Data World Forum (BDWF http://www.bigdatawf.com/) is specially designed for data-driven decision makers, managers, and data practitioners, who are shaping the future of the big data.
7. 要做什么?概述:网络拓扑 Legacy PHS Network PHS Core A interface IP/SS7 Google AdWords MobAdSense Servers Subscriber characteristic Profile Targeted ads Engine Internet CSC/CS/RP Internet Core Network SMSC OSS,NMS,TS Info. Service Gateway Google AdWords & AdSense System. MobAdWords Web Portal. Ads Customer Portal Account Management, Profile, Status, Statistic, Budget Control, Bill Report, etc. Operator Control examine and approve The contents Web Server Ads DB, Customer DB, Profile and OSS/Billing System