Ted Yu

Senior Member of Technical Staff @ Hortonworks

Ted Yu拥有15年软件开发经验，以及超过三年的HBase开发经验，2011年成为HBase代码提交者和PMC的成员。最近参与了HBase 0.96项目的开发，具体包括：引入Write-Ahead-Log接口，使得能够加载多种WAL实现；开发表的快照功能；开发WAL重播以降低 MTTR。同样还密切关注HDFS、Zookeeper和YARN，同时是HOYA代码提交者。

演讲主题：Recent developments in Apache Hbase 

HBase 1.0 release: Key features of HBase have approached maturity. It is time for HBase 1.0 to be released.
HydraBase achieves 4 9’s of availability across Data Centers. Each region will be hosted by a set of Region Servers. The set of regions are called replicas. There will be only one leader amongst the set whose election is done by using RAFT protocol.
Directly saving the binary MOB (medium object) to HBase leads to worse performance due to the frequent splits and compactions. A special MOB column family is introduced whose handling reduces write amplification.
Traditionally flush decision is made across all column families in a table. This results in small HFiles for column families which receive low write traffic. An approach to making per column family flush decision would alleviate this problem and reduce write amplification.